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Quick Key Facts

  • Bioremediation is a process that uses plants and microorganisms like bacteria, fungi and algae to treat contaminated soils, water and other pollution.
  • Microorganisms are very small organisms that live naturally in the environment and bioremediation stimulates the growth of certain microbes that use contaminants as a source of food and energy.
  • Bioremediation methods can be used to clean up oil and other petroleum products, chemical pollution, pesticides, wastewater and sewage, excessive nutrients in waterways, and can be used to break down plastic pollution.
  • Bioremediation may take place “in situ” at the contamination site, or “ex situ” away from the site.
  • For bioremediation to be effective, the right temperature, nutrients and food must be present. Proper conditions allow the right microbes to grow and multiply — and eat more contaminants.
  • Bioremediation can also be used on pollution caused by natural disasters like hurricanes, tsunamis and wildfires.

What Is Bioremediation?

Over the last century, urbanization and industrialization, combined with poor waste management, has led to an alarming rise in the amount of pollution in our soils, waterways, groundwater and air.

Heavy metal toxins from industrial production, chemicals from the agriculture sector, untreated wastewater, plastic pollution, crude oil leaks and spills, toxins from the increasing wildfires, and other pollutants need systems-level change. However, natural processes in the environment do offer solutions.

Bioremediation is a process by which plants and microbes that are already present in the environment — like fungi, algae and bacteria — have the power to remove or reduce environmental pollution — even plastic pollution.

While natural bioremediation has been around since the dawn of time (microbes were the earliest known life forms), modern bioremediation offers techniques that stimulate and augment these processes.

Types of Bioremediation

There are several forms of bioremediation. Here are some of the more prominent examples.

Microbial Remediation

Microbial remediation uses microorganisms to degrade organic contaminants or to bind heavy metals to make them less available to other organisms. Microorganisms can use them for food, or metabolize them along with food.

This can be done by breeding bacteria in high numbers and then introducing them into contaminated areas, through a process called bioaugmentation, or it can be done through a process called biostimulation, which creates the conditions for an ideal habitat for bacterial growth in the contaminated soil or water.

The byproduct of microbial remediation floats in the lagoon at the French Limited Superfund site in Houston, Texas on July 1, 1993. An industrial waste facility where oils, grease, acids and solvents were dumped, the site was treated with naturally occurring bacteria that digest toxic sludge. Paul S. Howell / Liaison

Phytoremediation

Phytoremediation uses plants to clean up contaminated soil, water and air. There are several subprocesses by which plants can do this.

With phytoextraction, contaminants are removed from the soil and concentrated in the plant tissue above ground. Some plants used to extract heavy metal contaminants are sunflowers, willow and Indian mustard.

Phytostabilization uses plants to sequester toxic heavy metals below ground to prevent migration into the ecosystem, helping to reduce the chance of metals entering the food chain. Poplar trees are one of the plants used for this process.

Phytoremediation with hydroponic plants at the abandoned Cunha Baixa uranium mine in Viseu, Portugal on May 30, 2014. Daniela / Flickr

In phytovolatilization, plants can also absorb contaminants, convert them into less toxic substances, then through transpiration, which is the exhalation through pores of the plant, let them evaporate in the atmosphere. Also, in the process of rhizofiltration, plants filter water through a root system that removes toxic substances and excess nutrients.

Mycoremediation

This process uses fungi’s digestive enzymes to break down contaminants in the environment. Fungi can break down chemical pollutants, including oil and pesticides, can extract or bind heavy metals, and can filter water. Fungi can also break down certain plastics.

Bioremediation Processes

While there are numerous bioremediation types, there are also several processes that have been utilized and are either done in situ (at the place of contamination) or ex situ (off-site of the contamination).

Some in-situ processes can involve bioventing, which is a process of aerating soils in order to promote bioremediation by stimulating the biological activity of indigenous microbial populations. Or it can involve the opposite, which is biosparging, injecting pressurized air or gas into contaminated zones in order to target chemical compounds that degrade under aerobic conditions.

There are also pump-and-treat methods that remove and treat contaminated groundwater.

Ex-situ processes can include landfarming, which is a waste treatment process that transports contaminated soil and spreads it on the ground at another site, stimulating microbial activity within the soils through aeration and/or the addition of minerals, nutrients and moisture.

As mentioned above through bioventing and biosparging, processes also involve whether or not an organism requires oxygen to break down an environmental contaminant, which is aerobic bioremediation, or if an organism carrying out bioremediation can breathe some other molecule besides oxygen, which is anaerobic bioremediation.

Bioremediation of Hazardous Waste Sites

In 1980, the United States Environmental Protection Agency (EPA) established the Superfund program to clean up sites contaminated with hazardous substances. Thousands of contaminated sites exist nationally and the waste is primarily due to hazardous waste being dumped or improperly managed by manufacturing facilities, processing plants, landfills, mining sites and pollution from the military.

Since 1999, the EPA has utilized bioremediation in cleanups involving petroleum and chemicals found in crude oil, pesticides and other contaminants. One of the most common methods used is bioventing, also known as biostimulation — aerating soils to stimulate the biological activity of indigenous microbes.

One of the sites they cleaned up is an example of anaerobic bioremediation and was used to remediate the groundwater at Dover Air Force Base in Delaware.

The area was contaminated by industrial activity and hazardous waste storage. Remediation began in 2006, and since then over 240,000 gallons of a solution of vegetable oil and sodium lactate were injected into the location to provide carbon sources to fuel the growth of microorganisms.

As of 2022, 1329 Superfund sites across the country were on the national priorities list, with 452 cleaned up since the program’s establishment. Though $1 billion dollars was recently allocated toward cleaning up 22 toxic sites, the program has languished for years due to a lack of funding.

Hemp phytoremediation on the former Loring Air Force Base – a Superfund site. Upland Grassroots

Grassroots organizations have also stepped up to use bioremediation. Upland Grassroots in Limestone, Maine is working to remediate Loring Air Force Base, which has been identified by the EPA as one of several sites with PFAS (also known as forever chemicals) in the soil, which can cause cancer and other adverse health effects.

The site has since been taken over by the M’ikmaq Nation, the Indigenous Tribe of Aroostook County. Tribal members teamed up with scientists to start a phytoremediation project that involved planting fiber hemp to pull the PFAS out of the ground, which they’ve done successfully since 2019.

Bioremediation Uses on Agriculture Land

According to the Center for Biological Diversity, the United States uses more than 1 billion pounds of pesticides every year, and as little as 0.1% of an applied pesticide interacts with its targeted weed or pest. The remainder contaminates the soil, air and water and can have significant impacts throughout the ecosystem and on public health.

Pesticides can also linger in the soil for years or decades after they are applied.

Over the last century, industrial agriculture has led to more application of pesticides. The pesticides are a major threat to ecosystem biodiversity, compromising soil health alongside other unsustainable agriculture methods.

Cleanup of soil contaminated by the use of pesticides on a former orchard, at Lincoln Elementary School in Wenatchee, Washington in 2006. Washington State Department of Ecology

Application of animal waste from industrial animal facilities can also be a cause of heavy metal contamination from metals in feed, including copper, zinc and lead. Animal waste from factory farms that is spread on agricultural fields may also contain harmful microbes and antibiotics, with other pharmaceutical residues that can affect soil.

Conventional approaches to remediation, which involve chemicals and physical extraction, are costly, and introduce other pollutants. However, phytoremediation approaches are more sustainable when reclaiming soils.

The Rhizae Renewal Collective phytoremediates a lead-contaminated lot in Baltimore’s Johnston Square, using sunflowers and fungi to make it suitable for food production, pictured on Sept. 18, 2020. Baltimore Heritage / Flickr

Currently, the Upland Grassroots folks are also planting fiber hemp on farmland owned by the Tribal Nation contaminated with pesticides and fungicides.

Other microbial remediation methods include biostimulation, through using indigenous microbes, nutrients and other substances to encourage microbes to feed on chemical pollutants. Bioaugmentation can also be used by introducing bacterial microbes sourced from outside the soil to aid in remediation.

Another method studied has been the use of microalgae. With its ability to grow rapidly in moist locations, microalgae can absorb and degrade toxic contaminants and heavy metals. Some of the non-degraded particles can be absorbed by microalgae, and then be turned into biomass for use in biodiesel production.

Construction equipment levels gravel and soil during a remediation project on the site of the old Pacific Rod and Gun Club at Lake Merced in San Francisco, California on Dec. 1, 2015. Paul Chinn / The San Francisco Chronicle via Getty Images

Bioremediation of Marine and Freshwater Environments

Our marine, coastal and freshwater resources are constantly impacted by human-caused pollution. Bioremediation methods are used with plastics, industrial and agricultural waste, chemicals from pesticides contaminating waterways and groundwater, raw sewage, fuel and other pollutants.

Workers from the Lake Restoration company pump gallons of alum into Lake Rebecca near Rockford, Minnesota on Nov. 10, 2010. The compound improves water quality by precipitating out phosphates in the lake water. David Brewster / Star Tribune via Getty Images

Oil Spills

Bioremediation methods were used during the devastating 1989 Exxon Valdez Oil spill of 11 million gallons over 1300 miles of Alaska coastline, killing hundreds of harbor seals and bald eagles.

Around 110,000 pounds of nitrogen in fertilizer was applied to numerous areas for three years. Through biostimulation, the nutrients added to the soils enabled local microbes to degrade contaminants more efficiently.

Another approach to bioremediation of oil spills is bioaugmentation, which uses oil-degrading bacteria to supplement the existing microbial population.

Treatment requires certain conditions to be effective. For example, the nutrients need to remain intact with the oiled material, and the concentration of nutrients, like in the fertilizer, needs to support the maximum growth rate of the microbes, both of which don’t work in open water environments, because anything applied to a floating oil slick would disperse.

However, hundreds of kinds of bacteria, fungi and archaea (microbes different from bacteria) are capable of degrading petroleum.

Phytoremediation is also utilized in oil cleanups. In one instance, researchers reported that a floating treatment wetland, which used four different plant species to vegetate a floating mat made of locally sourced materials, successfully remediated a majority of contamination at a water stabilization pit in Pakistan. The plants and the water in the pit were inoculated with different hydrocarbon-degrading bacteria.

Eutrophication

Eutrophication is when a body of water becomes overloaded on nutrients, as a result of human activity like sewage discharge, surface runoff from industrial agricultural practices with manure and fertilizers, and home lawn practices. This leads to acidification, harmful algal blooms which produce toxins that make humans and animals sick, and the depletion of oxygen, resulting in dead zones and fish kills.

According to the National Oceanic and Atmospheric Administration (NOAA), 65% percent of the estuaries and coastal waters in the contiguous U.S. studied by researchers are moderately to severely degraded by excessive nutrient inputs.

A floating island of plants to filter stormwater runoff and remove excess nutrients from the water is installed at Angelica Creek Park in Reading, Pennsylvania on Sept. 22, 2016. Lauren A. Little / MediaNews Group / Reading Eagle via Getty Images

Phytoremediation has been used as a solution, with species that soak up the nitrates and phosphates, abating overnutrition and eutrophication. Commonly used plants for this task are macrophytes, which are aquatic plants that float on the water, such as water hyacinth or water lettuce.

After the species soaks up the excess nutrients, the plants used to target the issue are harvested and disposed of, and depending on the kinds of pollutants in the area, might be composted and reused as fertilizer.

Bioremediation and Natural Disasters

While wildfires are typically human-caused, they are still considered natural disasters, and they often leave behind many toxins through dangerous ash, remains of incinerated hazardous household waste and building materials, charred paint, pesticides, cleaning products, and other items that leave pollutants in the soil like arsenic, asbestos, copper, lead and zinc.

California, which has suffered severe wildfire devastation in recent years, has utilized bioremediation.

The California Department of Resources Recycling and Recovery, known as CalRecycle — a department within the California Environmental Protection Agency — promotes the benefits of mycoremediation after wildfires.

Wildfires eliminate the soil’s protective vegetative layer, exposing it to wind and rain. This can lead to sediments being washed during heavy rainfall into waterways, roads and neighborhoods, and potentially dangerous mudslides.

Utilizing compost restores soil properties, provides a protective layer, binds and absorbs contaminants, increases water infiltration, protects against erosion and helps reestablish vegetation.

After the wildfires in 2017, as federal and state workers used traditional methods to remove a lot of the toxic debris, a coalition of fire remediation experts, local businesses and ecological activists in Sonoma County worked together to try mycoremediation with oyster mushrooms.

Called the Fire Remediation Coalition, they installed 40 miles of wattle — straw-filled tubes designed to prevent erosion — inoculated with oyster mushrooms around parking lots, along roads and across hillsides. These divert runoff from sensitive waterways, while the mushrooms break down the toxins.

Following the 2018 Camp Fire, a mushroom farmer who lost his property founded the nonprofit Butte Remediation to provide his neighbors with no-cost mycoremediation. The founder, Cheetah Tchudi, is now working alongside ecological restoration nonprofit CoRenewal, which after the 2020 fires has been experimenting with mycoremediation in some of the burn zones.

Mushrooms sprout from wattle following California’s Camp Fire in 2018. Butte Remediation

As Lahaina on Maui moves forward with recovery from a devastating fire last August, some residents are encouraging the local government to utilize bioremediation to clean up toxic pollutants in the water and soil.

The Maui Bioremediation Group is looking to remediate the environment using genki balls — biodegradable capsules filled with clay and beneficial microorganisms to clean the waterways — and like the Fire Remediation Coalition in California, use fungi-inoculated wattles.

Bioremediation for Plastic

Bioremediation can be one of the solutions to our plastic crisis. Research has shown a few ways this can occur. One is through mealworms, which can eat and fully degrade plastic in hours due to microscopic bacteria in their guts that result in them secreting an enzyme that allows for the breakdown.

Another study from a team of researchers in Queensland has pointed to superworms as a source to devour plastic. The team has been seeking to identify which superworm gut enzyme is most effective at degrading plastic, and they hope to reproduce it at scale for recycling.

Several different microorganisms like fungi, bacteria and algae have different enzymes that lead to degradation.

To date, 436 species of fungi and bacteria have been found to degrade plastic, while researchers continue to make new discoveries.

Scientists recently found two strains of fungi in soils that can break down polypropylene (plastic that is often used to make bottle caps and food containers) in just 140 days.

In 2016, scientists in Japan discovered a bacteria in sludge outside a bottling factory in Japan had developed the ability to devour or decompose PET plastics, leading some to believe breakthroughs like this might lead to industrial-scale facilities that can tackle plastic waste that otherwise might end up in a landfill.

Bacteria and fungi have also been found in the Alps and the Arctic that only work at cold temperatures. Nineteen strains, including 11 fungi and 8 bacteria, were able to digest polyester-polyurethane, while 14 fungi and 3 bacteria were able to digest polybutylene adipate terephthalate (used in food packaging, agricultural, textile and other industries) and polylactic acid (used in clothing, disposable cutlery and medical implants).

During the process of mineralization, algae has been found to transform plastic waste into metabolites such as water and carbon dioxide as well as new biomass. Microalgae, specifically, has also been a promising candidate to destroy microplastics, and is said to be easily cultivated on a large scale, because it doesn’t require fertile land, freshwater or pesticides to grow.

Research is ongoing in the bioremediation of marine plastic pollution, utilizing bacteria, fungi and microalgae to accelerate the biodegradation process that turns certain plastics into a source of carbon, hydrogen or methane.

Policy

In 2021, the EPA put out a document for Principles for Greener Cleanups, which outlines policy for evaluating and minimizing the environmental footprint when cleaning up contaminated sites. The document includes EPA’s recommended best management practices fact sheets for project managers and stakeholders.

Before and after photos of a green remediation project at the Elizabeth Mine in South Strafford, Vermont. U.S. Department of Environmental Protection

It includes processes such as biostimulation, bioaugmentation and bioreactors, which all in some ways promote the growth of microbes, or create the right conditions to help the process of allowing them to thrive to be able to aid in the breakdown of contaminates.

It also promotes the beneficial use of locally generated industrial byproducts like wood chips, sawdust or agricultural byproducts, as well as manure, wastewater and pesticide-free compost from mushroom farms instead of using new products.

Bioremediation Projects

CoRenewal

Formerly known as Amazon MycoRenewal Project, this nonprofit organization provides education and research in ecosystem restoration, health and healing, and sustainable community dynamics utilizing mycoremediation.

Maui Bioremediation Group

After the fires in Lahaina, a coalition of biologists, cultural practitioners, ecologists, conservationists and specialists teamed up to work towards using several bioremediation methods for cleanup of the wildfire disaster.

Butte Remediation

Established in 2018 in response to the Camp Fire in Northern California, this organization provides soil testing bioremediation with mycoremediation, and provides consulting and educational outreach.

Mycocycle

This Illinois-based company uses fungi to reduce toxins in some landfill materials like gypsum, carpet, rubber and asphalt, as well as to absorb and digest waste, then converts it into reusable materials that can be used in compost or building materials.

Upland Grassroots

This grassroots organization in Maine does phytoremediation research on fiber hemp’s ability to remove toxins. They are currently working on a Superfund site at the former Loring Air Force Base on land contaminated with jet fuel, as well as former farmland owned by the Mi’kmaq Nation that is contaminated with pesticides and fungicides.

Phytoremediation using hemp at the former Loring Air Force Base in Limestone, Maine. Chelli Stanley / Upland Grassroots

Genki Ala Wai Project

Hawai’i-based nonprofit using genki balls (mud balls made with clay, soil, rice, bran, molasses and other components) to restore the ecosystem at the polluted Ala Wai Canal on O’ahu, so it can once again be swimmable and fishable.

The post Bioremediation 101: Everything You Need to Know appeared first on EcoWatch.

https://www.ecowatch.com/bioremediation-facts-ecowatch.html

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Earth911 Inspiration: Half The Energy and Doing Just Fine

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Stewart Brand, who popularized the “blue marble” photograph that changed humanity’s perspective on the fragility of the Earth, points out that Californians and Europeans use half the energy of the typical American, without losing any quality of life. This quote comes from Whole Earth Discipline: Why Dense Cities, Nuclear Power, Transgenic Crops, Restored Wildlands, and Geoengineering Are Necessary, and Brand is also the creator of the Whole Earth Catalog.

Post and share Earth911 posters to help people think of the planet first, every day. Click the poster to get a larger image.

The post Earth911 Inspiration: Half The Energy and Doing Just Fine appeared first on Earth911.

https://earth911.com/inspire/earth911-inspiration-half-the-energy-and-doing-just-fine/

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Best of Sustainability In Your Ear: Project Repat Is Saving US Jobs & T-Shirts From Landfills

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Project Repat, founded by Ross Lohr and Nathan Rothstein, had prevented more than 11 million T-shirts from landfills while bringing some sewing work back to the United States when we talked with them in 2019. They’re still going strong. Tune into a classic conversation as Earth911’s Mitch Ratcliffe talks with Rothstein about the inspiration behind Project Repat and the massive changes in U.S. T-shirt manufacturing over the past 30 years. After migrating to Mexico, T-shirt printing jobs have gone overseas and few American companies still make them.

A Project Repat quilt memorializes a soldier’s tours of duty.

Project Repat has a better idea: turn old shirts into keepsake quilts hand-sewn using T-shirts sent by customers. Instead of tossing a T-shirt in the donation bin, it can be turned into a part of a memorable and snug quilt. Love a sports team? Make a quilt of the team T-shirts and jerseys you’ve purchased over the years. Want to remember a school or a company where you worked? In all likelihood, you have the makings of a Project Repat quilt. Reasonably priced  based on the size, Project Repat takes your order and receives your shirts by mail, then turns them into fleece-backed quilt.

Editor’s note: This epsiode originally aired on October 7, 2019.

The post Best of Sustainability In Your Ear: Project Repat Is Saving US Jobs & T-Shirts From Landfills appeared first on Earth911.

https://earth911.com/podcast/earth911-podcast-october-25-2019-saving-us-jobs-and-t-shirts-from-landfills-with-project-repat/

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Sustainability In Your Ear: The XPRIZE Wildfire Competition Heats Up

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Every wildfire starts small. The problem is that by the time most are detected, minutes have already passed and, under increasingly common conditions driven by a warming climate, a fire can grow beyond any tanker truck’s capacity to contain. The gap between ignition and coordinated response currently averages around 40 minutes. Firefighters have long understood the math: a spoonful of water in the first second, a bucket in the first minute, a truckload in the first hour. The XPRIZE Wildfire competition is an $11 million global effort to prove that autonomous systems, including AI-enabled drones, ground-based sensor networks, and space-based detection platforms, can collapse that window to 10 minutes. Our guest is Andrea Santy, who leads the program. She came to XPRIZE after nearly two decades at the World Wildlife Fund, where she watched conservation projects fall to wildfire. That experience sharpened her understanding of the stakes: wildfires are now the leading driver of deforestation globally, having surpassed agriculture. In places like the Amazon, the Congo Basin, and parts of tropical East Asia, a single fire can eliminate species found nowhere else on Earth. In cities, it can destroy entire neighborhoods in hours. On January 7, 2025, Santa Ana winds drove flames through Pacific Palisades and Altadena, destroying more than 16,000 structures, killing 30 people, displacing 180,000 residents, and generating between $76 billion and $130 billion in total economic losses from a single event. Annual U.S. wildfire costs, when healthcare, lost productivity, ecosystem damage, and rebuilding are included, are estimated between $394 billion and $893 billion. XPRIZE announced the five autonomous wildfire response finalists just over a year after the LA fires: Anduril, deploying its Lattice AI platform with autonomous fire sentry towers and Ghost X drones; Dryad, running solar-powered mesh sensor networks that detect fires at the smoldering stage; Fire Swarm Solutions, coordinating heavy-lift drone swarms that can deliver 100 gallons of water autonomously; Data Blanket, building rapidly deployable drone swarms for real-time perimeter mapping and suppression; and Wildfire Quest, a team of high school students from Valley Christian High School in San Jose who used multi-sensor triangulation to locate fires that can’t be seen from monitoring positions, solving the literal over-the-hill problem that any fire detection system faces.

Andrea Santy, program director of XPRIZE Wildfire, is our guest on Sustainability In Your Ear.

The conversation covers what the finalists demonstrated during semi-final trials at 40-mile-per-hour winds, why the decoy fire requirement — distinguishing a wildfire from a barbecue, a pile burn, or a flapping tarp — is one of the hardest AI classification problems in the competition, and how autonomous systems would integrate with existing incident command structures. Santy is direct about where progress is lagging: the testing is ahead of the regulations. Autonomous drones operating beyond visual line of sight and coordinating with manned aircraft in active fire emergencies require FAA frameworks that don’t yet exist at the necessary scale. There’s also the deeper ecological tension — the growing scientific consensus that many fire-adapted landscapes need more fire, not less, and that indigenous fire stewardship practices developed over millennia have a place alongside autonomous suppression technology. One XPRIZE finalist is already working with an indigenous community in Canada to pilot their heavy-lift drone system in a remote area where that community is exploring how the technology fits their land management approach. Meanwhile, the Trump administration’s FY 2026 budget proposes eliminating Forest Service state fire capacity grants, cutting vegetation and watershed management programs by 30%, and zeroing out $300 million in forest research funding — maintaining suppression spending while gutting the prevention and detection infrastructure that could reduce what there is to suppress. The engineering, Santy says, has arrived. Whether the institutions can move at the speed the crisis demands is the harder question.

You can learn more about XPRIZE Wildfire and follow the finalists at xprize.org/competitions/wildfire.

Interview Transcript

Mitch Ratcliffe  0:09

Hello, good morning, good afternoon, or good evening, wherever you are on this beautiful planet of ours. Welcome to Sustainability In Your Ear. This is the podcast conversation about accelerating the transition to a sustainable, carbon-neutral society, and I’m your host, Mitch Ratcliffe. Thanks for joining the conversation today.

Fire season is coming, and we’re going to dig into how new technology may catch and contain fires in the first few minutes after ignition. There’s a saying among firefighters: you can fight fire in the first second with a spoonful of water, in the first minute with a bucket of water, and in the first hour with a truckload of water. The problem is that by the time most wildfires are detected, minutes have already passed, and in those minutes, under increasingly common conditions, a fire can grow beyond any tanker truck’s capacity.

On January 7, 2025, hurricane-force Santa Ana winds drove flames through Pacific Palisades and Altadena in Los Angeles, and in a matter of hours, more than 16,000 structures were destroyed. Thirty people were killed, and 180,000 residents were forced to flee. The total economic losses are estimated to be between $76 billion and $130 billion from a single fire event. And that was just one week in one city. In 2025, the U.S. recorded more than 61,500 wildfires that burned nearly 5 million acres, leading to annual U.S. wildfire costs of between $394 billion and $893 billion when you factor in the cost of healthcare, lost productivity, ecosystem damage, and the expensive task of rebuilding entire cities.

So there’s an identifiable gap in the current best practices, which take roughly 40 minutes from ignition to deliver a coordinated response. What if you could cut that to 10 minutes, when only a few buckets of water could extinguish a threat? And what if autonomous systems — AI-enabled drones and ground-based sensor networks — could detect a fire, distinguish it from a prescribed burn, and suppress it before getting a human on the radio?

That’s the challenge behind the XPRIZE Wildfire program, an $11 million global competition now entering its final year, and our guest today is Andrea Santy, the program director leading it. Andrea came to XPRIZE after nearly two decades at the World Wildlife Fund, and before that she spent time at the Smithsonian Institution, leading conservation and academic programs.

On January 29 — just after the one-year anniversary of those LA fires — XPRIZE announced the five finalist teams advancing in the autonomous wildfire response track of the competition. They include:

Andruil, a defense technology company deploying a Lattice AI platform with autonomous fire sentry towers and Ghost X drones that watch for fires at the moment they break out;

Dryad, a German company running solar-powered sensor networks that detect fires at the smoldering stage;

Fire Swarm Solutions, a Canadian team coordinating heavy-lift drone swarms that can carry 100 gallons of water autonomously to the point where a fire begins;

Data Blanket, building a rapidly deployable drone swarm system for real-time perimeter mapping and suppression; and

Wildfire Quest, a team of high school students from Valley Christian High School in San Jose who partnered with two aerospace companies to use multi-sensor triangulation to locate fires that cannot be seen from monitoring locations — because, after all, a lot of fires happen just over the hill.

A separate track of the competition, the space-based wildfire detection and intelligence program, includes 10 finalists from six countries who are heading to Australia in April for their own finals. Those teams will have one minute to detect all fires across an area larger than a state, and 10 minutes to deliver precise reports to firefighting decision-makers on the ground.

We’re going to talk with Andrea about what the finalists demonstrated during live trials, why the decoy fire requirement is one of the hardest AI classification problems in the competition, and how these autonomous systems would actually integrate with existing wildfire incident command structures. We’ll also dig into the tension between suppression technology and the growing scientific consensus that many landscapes need more fire, not less, and whether indigenous fire stewardship practices have a place in this conversation.

You can learn more about XPRIZE Wildfire at xprize.org/competitions/wildfire. Can autonomous drones and AI-driven sensor networks actually detect and suppress a wildfire in less than 10 minutes? Let’s find out right after this brief commercial break.

[COMMERCIAL BREAK]

Welcome to the show, Andrea. How are you doing today?

Andrea Santy  5:34

I’m doing great, Mitch. Thanks for having me.

Mitch Ratcliffe  5:34

Well, thanks for joining me. We’ve had XPRIZE leaders on the show a number of times, and you do such interesting work. You announced the finalists just at one year after the catastrophe in LA. How did that reshape the urgency and direction for the XPRIZE Wildfire competition?

Andrea Santy  5:34

It definitely focuses a more intense light on the competition and the need for these solutions. Climate change is driving more intense, more frequent wildfires all around the world, and so I think the urgency was already there. But when you have a disaster at the scale and scope of the LA fires, it absolutely changes the way that everybody thinks about wildfires.

Mitch Ratcliffe  6:04

What’s the realistic timeline for these technologies in the competition to potentially start changing the way that we fight fire and the outcomes of those fires?

Andrea Santy  6:14

So I’ll start by saying we were in LA when the fires started. XPRIZE has a lot of LA-based staff, and we’re originally LA-based, and we were having our staff meeting — so our entire staff was there. We knew from our prize that it was going to be very high risk, and so we were in touch with fire chiefs as the fires were starting. We were able to go out and see where the fires had gone through the Palisades and part of the city — basically 24 hours after it had happened.

It really, I will just say, definitely had a huge impact in terms of being able to see a landscape, communities, homes, schools, and businesses that had been devastated. A lot of the technology being integrated with these solutions can be deployed almost immediately. I think that as the fire agencies begin to get their hands on more of this technology, we’re going to have a hopefully relatively quick uptake. Cameras, sensors, satellite data — a lot of this is already being deployed. So we’re looking at how quickly and under what conditions it can help improve our detection. And then we have other components that I would say are going to have a longer timeline to full deployment.

Mitch Ratcliffe  7:56

It sounds like part of the problem, then, is just knitting all this together. Does that also apply to areas outside of major cities? Do we have the resources to do this on a nationwide basis?

Andrea Santy  8:10

Yeah, absolutely. We’re doing our testing for our space-based competition in Australia, so we’re looking at how you detect fires over vast areas from satellites as quickly as possible and deliver that information down within 10 minutes, with 15-minute updates. For our autonomous track, we’re testing in Alaska — so it will definitely be a real-world scenario where we can understand the capabilities of these technologies in forested areas, in really vast terrain, and under different environmental conditions. Part of why we’re working with these partners is because they’re great partners, but it also allows us to validate this technology under real-world, challenging conditions.

Mitch Ratcliffe  9:03

So how does the wildfire strategy change when this technology is in place? You’ve already mentioned that the climate crisis is accelerating the size and pace of these fires. Is the goal to suppress more fires earlier so that available resources can be deployed to those that actually break out? What’s the big-picture change in policy here?

Andrea Santy  9:26

XPRIZE really decided to double down on early detection and autonomous response, and we have two tracks. I’ll talk about the detection piece first because it’s digestible for everyone. Every wildfire starts small. They don’t start as a huge catastrophe — they start small, often in pretty remote areas. Sometimes they burn really fast, sometimes slower, depending on the conditions. But if you can address a wildfire at its very smallest phase, essentially post-ignition, that gives you the best chance to address it — either through autonomous suppression systems or through your fire service. If you have more eyes, ears, and noses on the landscape, the better your chance of getting that alert as soon as possible, which allows the fire service to decide how to prioritize their resources.

The second component we’re advancing is autonomous detection and response. Sensors and cameras handle the detection; the autonomous response system deploys, verifies there is a fire — that it’s not a barbecue but an actual wildfire that needs suppression — and places suppressant fully autonomously. That’s what we’re going to be testing in Alaska: can they execute this full end-to-end system? Is the technology integrated? Will it reach the scale and scope of the challenge and the geography? Because 1,000 square kilometers — which is our testing area — is roughly the size of San Antonio, Texas. The teams will have to find multiple fires and demonstrate persistent monitoring and persistent response. Imagine having a fire starting in a ravine: if you can get something out there in minutes, your chance of knocking it down — even just deterring the spread enough that firefighters can arrive — we hope will be a game changer.

Mitch Ratcliffe  12:13

We’re talking about autonomous drones. But one of the things that happened in the LA wildfire was that Santa Ana winds were so extreme, fixed-wing aircraft couldn’t fly. Can a drone perform in those conditions?

Andrea Santy  12:27

During our semi-final testing, our team traveled the world to observe these solutions in action. While not at scale, each of the five finalists was able to demonstrate that they could detect a fire, navigate to it, and suppress it fully autonomously over a small area. Coincidentally, relatively strong winds followed us — nothing like the Santa Ana winds, but we had 40-mile-per-hour winds pretty consistently during testing. It was odd, but it was helpful in terms of validating the technology.

Because you don’t have a human pilot, it’s not that helicopters and planes can’t fly — it’s that they can’t fly in that type of wind without putting a human at risk. This approach removes at least that human element. It’s going to continue to be a challenge, but many of the drones have a relatively high wind tolerance, and as the technology improves, the systems themselves are providing the input to stay balanced.

Mitch Ratcliffe  13:54

These systems are also being combined with sensor networks. Can you talk about how those are being deployed?

Andrea Santy  14:01

Some teams are really focused on ultra-early detection by deploying a sensor network — many, many sensors connected through a mesh network — allowing small, distributed sensors across a large area, which gives you great coverage. All of the different teams are competing under the same scenario, so we’ll get to see which technologies work under which conditions. There’s no single silver bullet that works in every condition, every geography, and every forest type. We’re also working on a pilot phase post-competition so the teams can continue to test and deploy, gaining even better understanding. Building trust with fire agencies — so they know what the technology can do under critical situations — is really important.

Mitch Ratcliffe  15:24

Do the fire agencies participate in these trials as well?

Andrea Santy  15:28

Absolutely. We have partners from different fire agencies in Australia — we’re doing our testing with the Rural Fire Service of New South Wales, which is a testing partner. Many of our judges come from different fire agencies across the United States and around the world. From the beginning, that was really an ethos we set forward — making sure this was done hand in hand with the fire agencies.

Mitch Ratcliffe  15:59

You’ve mentioned decoy fires. I’m curious how the trials will incorporate them. You mentioned barbecues — are you going to have people setting up small fires to lure the competition’s sensors?

Andrea Santy  16:11

I can’t say too much because testing hasn’t happened — I can’t give away the secret sauce. But yes — the teams do know they will have decoys and will need to ensure their technology ignores them. It can be anything from something flapping in the wind that resembles the color of fire all the way to barbecues or pile burns — anything that would confuse the technology.

Mitch Ratcliffe  16:52

And that could happen any day of the year. Really interesting. One of the most compelling things about the competition is the breadth of sources of ideas and the range of approaches — including even a high school team from Valley Christian High School in San Jose. What does that diversity tell us about where wildfire innovation will actually come from?

Andrea Santy  17:15

At XPRIZE, we believe that ideas can come from anyone, anywhere, and I think XPRIZE Wildfire really demonstrates what that looks like. We had teams from over 55 different countries enter the competition. We currently have six countries represented through our finals teams, and the range spans from Valley Christian — a high school team — through universities, startups, and all the way up to major industry. That truly spans the whole spectrum.

What I really love about our competition is that for many of the teams, this is both a company and a passion. Wildfires happen in so many places, and so many teams have been personally impacted. The high school team talked about growing up in areas where wildfires are a constant presence — they are very cognizant of the need for these solutions. Something remarkable: one in six Americans live in an area of wildfire risk, and 25% of Californians.

Mitch Ratcliffe  18:57

It’s a very tangible problem for so many of us, particularly in the West. And the smoke from fires in Canada is now familiar on the East Coast — it’s changed the very shape of life. This is a great place to take a quick commercial break. We’ll be right back.

[COMMERCIAL BREAK]

Welcome back to Sustainability In Your Ear. Let’s return to my discussion with Andrea Santy. She is Program Director of XPRIZE Wildfire — a competition headed into its final year with two groups of finalists vying to win shares of an $11 million prize to help commercialize their technologies.

Andrea, the autonomous competition requires teams to detect and suppress a high-risk wildfire in a 1,000-square-kilometer area — roughly the size of San Antonio — and do it within 10 minutes, while ignoring decoy fires. That’s four times faster than current best practices. Have any of the teams met that benchmark yet in the trials?

Andrea Santy  19:57

As I mentioned, the five teams advancing to finals all demonstrated they have end-to-end solutions to autonomously detect, navigate, and suppress a fire. Our semi-final testing was at a much smaller scale, and while some teams did it in less than 10 minutes, this finals competition is at a very large scale — and it is going to be challenging. Every XPRIZE is very audacious. We really want to push the limits, but we’re very confident we’re going to have a team that can do it. Still to be seen, but that is what finals is for.

Mitch Ratcliffe  20:42

Absolutely. It’s great that we’re testing in such diverse settings. Australia and Alaska seem very different. Is that actually the case, or are wildfire conditions globally roughly the same?

Andrea Santy  20:59

Very different. In Alaska, it will be wildfire season, and we’re testing in an area of much lower risk. The vegetation is different. The geography is different. The fuels — the plants and trees — are different. In Australia, the teams will be arriving as it comes out of summer and goes into fall, which means we don’t actually know exactly which specific days we’ll test, because the Rural Fire Service has to execute prescribed burns when it’s safe. We have a two-week testing window, with five planned days of testing, and approximately 20 fires of varying sizes that the teams will need to identify under different conditions and vegetation types.

Mitch Ratcliffe  22:11

Let’s talk a bit about the space-based prize. Lockheed Martin is adding a million dollars for the teams that can demonstrate the fastest and most accurate detection. Is detection turning out to be the harder technical problem — or is it the transition from detection to action, that coordination piece we talked about?

Andrea Santy  22:40

Lockheed Martin is supporting the autonomous wildfire response track — which we call Track B. The autonomous track requires teams to detect, navigate, and suppress, with all teams using drones. There’s a lot of different detection technology, from sensors that detect particulates up to cameras, and sensors and cameras mounted on drones.

Getting that detection into these autonomous response systems is really the step change — having something that communicates without human intervention, with drones that can fly under wind conditions and navigate to the right location, confirm there’s a fire, and then suppress it accurately. The teams will be testing on a moving fire — not a barrel of fire, but an actual fire that will be dynamic and small-scale but moving. That’s really challenging and requires quite a bit of system training. During semi-finals, accurately hitting the target was one of the harder challenges.

Mitch Ratcliffe  24:43

As you talk about it, it sounds like the transition from detection to addressing the fire appropriately — choosing the right suppression mechanism — is something you’ll continue to work on.

Andrea Santy  24:58

The teams are definitely still working on their systems. They have until June to have all of their systems working. Yeah, it requires a lot of different components.

Mitch Ratcliffe  25:20

And obviously that’s part of the bigger challenge — coordinating technological responses to a changing climate and acute situations like fire. As you observe the environment with these systems, are we also potentially identifying opportunities for prescribed burns in order to reduce fire risk?

Andrea Santy  25:45

Absolutely. While our competition is focused on detection and response to incipient-stage wildfires, I do think this technology can be utilized across many different scenarios — including prescribed burns, where you want to monitor large burn areas to ensure nothing escapes. That is definitely a use case, and anything that reduces our risk. Personally, I think it could provide peace of mind: if you have something on hand that can prevent a prescribed fire from spreading when weather conditions change unexpectedly, that’s enormously valuable.

Mitch Ratcliffe  26:43

Indigenous communities have managed fire for millennia using these kinds of burning practices. Have you engaged with tribal fire practitioners? Do they see autonomous technology as complementary to, or in tension with, their traditional fire stewardship programs?

Andrea Santy  27:02

We have engaged with some. I was just at a meeting where I was able to meet with a representative from an indigenous community in Canada, and they are actually going to pilot-test one of the team’s technologies — specifically a team with a heavy-lift drone. It was really exciting to talk with them and learn more about how they envision it being used. Their community is quite remote, and understanding how this technology could work within their context was a great conversation.

Mitch Ratcliffe  27:41

When I think about the swarm of drones approach to fire management, the regulatory landscape seems like a significant challenge. The FAA has been grappling with drone airspace management. Does the regulatory framework need to change significantly to accommodate these systems?

Andrea Santy  28:06

That’s an excellent question. Current regulations and protocol don’t allow drones in airspace with manned aircraft. As the technology gets better, there are definitely ways this can happen — there are pilots and tests already occurring with other partners looking at shared airspace for heavy-lift drones operating at higher altitudes. Beyond visual line of sight is one area where the testing is definitely ahead of where the regulations are.

Mitch Ratcliffe  28:55

What has your conservation career taught you about how technology deployment can shape our relationship with nature?

Andrea Santy  29:07

I got into this position in part because many of the projects I was working on at the World Wildlife Fund were being lost to wildfire, and I felt we hadn’t really understood the impact of wildfires on conservation. Wildfires are now the main driver of deforestation globally, having surpassed agriculture. In places like the Amazon, the Congo, and parts of tropical East Asia, there’s such critical biodiversity — and I think if we can use technology to monitor these areas, understand where fires are happening, and deploy appropriate responses, my hope is that we can save really, really important places. There are endemic species that only live in very, very small areas, and one fire could wipe out an entire species.

I also worked for a long time on projects where your goal was 20 to 50 years away. Being able to work with XPRIZE, where in three years we’ve seen an absolute transformation in both what the technology can do and how people understand what technology is for — I think we need more of these competitions, more technology applied to conservation problems. I’m really hopeful.

Mitch Ratcliffe  31:23

After three years with XPRIZE Wildfire, do you feel like we can turn back the rising incidence of wildfire and all the costs we’re seeing pile up when cities burn?

Andrea Santy  31:35

I think so. Communities and citizens around the world are understanding the problem at a deeper level. This is going to be all hands on deck. You need citizens and homeowners making sure they have zone zero — no vegetation around their homes. You need communities, city and state incentives, industry engagement. You need prescribed fire and better forest management policies that allow good fire on the landscape, and communities that encourage it. All of these factors together are what will get us to a new paradigm.

Mitch Ratcliffe  32:29

You mentioned raising awareness — this competition actually sounds like really good TV. Have you thought about how to tell this story of wildfire innovation so that people can get engaged with and behind this kind of activity?

Andrea Santy  32:49

We’ve discussed at length how we would be able to document some of the testing. For the autonomous wildfire response, it is a very big, vast area, and turning it into good TV is probably a step beyond us — but I think the teams have amazing stories to tell. We’re going to capture a lot of imagery to share that story out. We have a resource page that provides a lot of different information to homeowners and individuals about other really amazing organizations doing great work in the wildfire space.

Mitch Ratcliffe  33:47

How can our listeners follow along as you complete the project?

Andrea Santy  33:51

We’d love to have them follow along. The easiest way is xprize.org/wildfire — we have lots of information about the competition and the teams, lookbooks to learn about which teams are competing, social media updates, and a newsletter you can subscribe to. During the testing events we’ll be sharing quite a bit of good information. The events are in fairly remote, closed-system locations, so we can’t invite everyone there — but we’ll definitely be exploring how to make sure as many people as possible can get their eyes on what we’re doing.

Mitch Ratcliffe  34:42

Andrea, thank you very much for spending time with us today. It’s been a really interesting conversation.

Andrea Santy  34:48

Thank you so much. We hope all your listeners think deeply about wildfire and what they can do. Our goal is that collectively we can all work together to reduce this wildfire risk and keep good fire on the landscape.

[COMMERCIAL BREAK]

Mitch Ratcliffe  35:11

Welcome back to Sustainability In Your Ear. You’ve been listening to my conversation with Andrea Santy, Program Director of XPRIZE Wildfire, an $11 million global competition now in its final year. Learn more and follow the finalists at xprize.org/competitions/wildfire.

This conversation revealed, at least for me, that solutions to wildfire are arriving — but perhaps faster than the systems built to receive them can accept and use them. We’ll need more public funding to deploy these technologies, and right now we’re moving in the wrong direction. As wildfire damage grows, total federal wildfire spending is holding roughly flat at around $7 billion a year. However, the Trump administration’s FY 2026 budget proposes eliminating the Forest Service’s state fire capacity grants, cutting vegetation and watershed management programs by 30%, and zeroing out the $300 million in forest research funding that was in the budget previously. So we’re maintaining the suppression budget while cutting the prevention, detection, and research infrastructure that could reduce what we have to suppress.

Fortunately, we have XPRIZE Wildfire to take on some of the burden — but it’s not enough. Consider what Andrea said about early detection: every wildfire does start small. If autonomous systems can get suppressant on a fire quickly enough, it might not even need to be fully extinguished — just deterred enough that firefighters can arrive to finish the job. The technology to do that end-to-end and autonomously is already being demonstrated in the field. But Andrea was equally direct about what’s lagging: the testing is ahead of where the regulations are.

Consider autonomous drones operating beyond visual line of sight and coordinating with manned aircraft during active fire emergencies. For that to work, the FAA’s frameworks for widespread drone operations need to be reinvented. The recent closure of El Paso International Airport over nearby counter-drone laser testing is evidence of how unprepared we truly are for the innovations that are coming.

In short, the engineering has arrived, but institutions need support to integrate that engineering into their operations. A similar gap is evident in who’s doing the innovating: teams from over 55 countries entered this competition, and a high school team from San Jose made the finals by solving the problem of locating fires beyond ridgelines using multi-sensor triangulation — not because they had institutional backing, but because they had access to a well-defined problem and the drive to solve it, along with the incentive of XPRIZE’s $11 million award.

The XPRIZE premise that ideas can come from anyone, anywhere — it turns out — is literally true. But recognizing that changes nothing if the regulatory, procurement, and deployment systems still favor incumbents and slow-moving approval processes.

Underlying all these challenges is what Andrea brought to this work from nearly two decades at the World Wildlife Fund: wildfires are now the leading driver of deforestation globally, having surpassed agriculture. The game has changed, but policy is still anchored in now-outdated 20th-century strategies. One fire in the wrong place can drive a species to extinction, or it can burn a city to the ground.

Andrea said she’s hopeful — not because the problem is easy, but because in three years she’s watched a transformation in what technology can do and how people understand what technology is for. That hope is well earned. But it will only translate into outcomes if institutions move at the speed the crisis demands — citizens, homeowners, communities, industries, and policy, all moving together. The competition creates urgency; the systems around it need to act on and use the innovations being delivered.

So stay tuned for more conversations with people actually making sustainability happen, and I hope you’ll check out our archive of more than 540 episodes. There’s something worth sharing with anyone you know. Writing a review on your favorite podcast platform will help your neighbors find us — because, folks, you are the amplifiers that spread ideas to create less waste. Please tell your friends, your family, your co-workers, and the people you meet on the street that they can find Sustainability In Your Ear on Apple Podcasts, Spotify, iHeartRadio, Audible, or wherever they get their podcast goodness.

Thank you for your support. I’m Mitch Ratcliffe. This is Sustainability In Your Ear, and we will be back with another innovator interview soon. In the meantime, folks — take care of yourself, take care of one another, and let’s all take care of this beautiful planet of ours. Have a green day.

The post Sustainability In Your Ear: The XPRIZE Wildfire Competition Heats Up appeared first on Earth911.

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