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Showing posts from September, 2025

Every time you flush the toilet, you may be inadvertently contributing to a global environmental crisis: wastewater pollution. Eighty percent of the world's wastewater enters our waterways without adequate treatment — and the repercussions are critical for both human and ecological health.

Tune in to waste(d)water, a first-of-its-kind podcast from The Nature Conservancy, to hear from experts across disciplines and geographies, so we can unpack wastewater pollution and learn about the solutions to tackle it. From resource recovery to nature-based solutions, we can reshape how we perceive and manage wastewater.

Listen to the podcast on your favorite streaming platforms:

EPISODE FOUR: SHOW NOTES

 

Burden or benefit? Recovering resources from wastewater

 Featuring Dr. Sasha Kramer, Maile Lono-Batura & Dr. Daniel Yeh


LISTEN ON:     Apple Podcasts    ◦    Spotify    ◦    YouTube



DESCRIPTION
What if wastewater could fuel our homes and feed our crops? In this episode of waste(d)water, host Kassie Morton dives into the transformative potential of domestic wastewater. Joined by Dr. Sasha Kramer (SOIL Haiti), Maile Lono-Batura (California Association of Sanitation Agencies), and Dr. Daniel Yeh (University of South Florida), we explore how biosolids and biogas can become renewable energy, sustainable fertilizer, and climate solutions. From cutting-edge tech like the NuGenerator to community-led models in Haiti, discover how circular sanitation can protect ecosystems, boost food security, and reduce emissions — while confronting challenges like PFAS contamination, financing, and public perception.


KEY WORDS
wastewater management, biosolids, sustainable agriculture, resource recovery, sanitation technology, circular economy, environmental health, SOIL Haiti, NuGenerator, PFAS


AT A GLANCE

  • Waste can be a valuable resource if managed properly.
  • Biosolids can contribute to sustainable agriculture.
  • Innovative technologies are transforming wastewater treatment.
  • Haiti faces significant sanitation challenges due to poor infrastructure.
  • SOIL Haiti is a model for sustainable sanitation practices.
  • Regulatory frameworks need to adapt to emerging contaminants.
  • Collaboration is key to solving wastewater issues.
  • Public awareness of wastewater's value is essential.
  • Future innovations in wastewater management are promising.

GUEST BIOS

Dr. Sasha Kramer is the Co-founder and Executive Director of SOIL Haiti. She’s an ecologist and human rights advocate who has been living and working in Haiti since 2004. She received her Ph.D. in Ecology from Stanford University in 2006 and co-founded SOIL that same year. Sasha is also a global advocate for the recycling of nutrients in human waste, helping others implement sustainable sanitation projects and inspiring people around the world to participate in the sanitation revolution. 

Maile Lono-Batura is the Director of Renewable Resources with the California Association of Sanitation Agencies, and prior to this was the Director of Sustainable Biosolids Programs at the Water Environment Federation after serving as Executive Director of Northwest Biosolids for 22 years. She holds a B.A. in Community & Environmental Planning with an Environmental Studies Minor from the University of Washington, received her Master’s in Nonprofit Leadership from Seattle University, and is a Certified Compost Facility Operator through the Washington Organic Recycling Council and a Board-Certified Environmental Scientist with the American Academy of Environmental Engineers and Scientists Board (AAEES). 

Dr. Daniel Yeh is a Professor of Environmental Engineering at the University of South Florida where he leads the Membrane Biotechnology Laboratory, focused on the research and development of innovative wastewater treatment and resource recovery technologies. He is a LEED green building accredited professional, a registered professional engineer, and a board-certified environmental engineer. He is also a Visiting Professor at NASA's Kennedy Space Center in the area of regenerative water purification for space. One of Daniel’s most impactful inventions is the NEWgenerator a portable and self-contained solar-powered toilet system that converts the collected waste into renewable energy, fertilizer nutrients, and clean water that can be used for irrigation of crops.


CHAPTERS

00:00 The Value of Waste: A New Perspective on Human Excrement

02:48 Wastewater as a Resource: Exploring Circular Economy Solutions

05:47 Innovative Technologies in Wastewater Treatment

11:30 Real-World Applications: Success Stories in Waste Recycling

17:51 Challenges and Opportunities in Sustainable Sanitation

23:24 Regulatory Landscape: Navigating Biosolids Management

29:26 Emerging Contaminants: The PFAS Challenge

35:35 Future Directions: Scaling Up Resource Recovery Programs

41:28 Collaboration for Change: Building a Sustainable Future



EPISODE RESOURCES

Brief: Resource Recovery from Domestic Wastewater Ocean Sewage Alliance

Solution Space: Fertilizer Recovery
Ocean Sewage Alliance
Explore the solution

Solution Space: Resource Recovery
Ocean Sewage Alliance
Explore the Knowledge Hub

Wastewater: Turning Problem to Solution 
United Nations Environment Programme, 2023 

SOIL Haiti
 
Sustainable Sanitation in Haiti 

Bill Gates Wants to Reinvent the Toilet The Daily Show, 2019 (Interview with Daniel Yeh) 

Bill Gates Drinks Water That Had Been Poop Just Minutes Before 
Time, 2015 

Biosolids Communication Toolkit 
Water Environment Federation

Phosphate Fertilizer Crisis Threatens World Food Supply 
The Guardian, 2019

Foodscapes: Toward Food System Transition The Nature Conservancy / IIASA / SystemiQ, 2021 

As Prices Soar, Japan Returns to Human Waste Fertilizer Phys Org, 2023 

Understanding Food Loss and Waste
Ishangulyyev et al., 2019 

How and Who Regulates the Use of Biosolids? 
School of Plant & Animal Science, Virginia Tech, 2011 

A History of Human Waste as Fertilizer 
Zeldovich, 2019
Treatment Technologies for PFAS in Biosolids Garg et al., 2022 

PFAS Substances in Biosolids 
U.S. Environmental Protection Agency 

EPA’s PFAS Strategic Roadmap 
U.S. Environmental Protection Agency, 2021-2024 

Forever Chemicals Are Everywhere. Here’s How to Limit Your Exposure 
Wirecutter , 2024 

Something’s Poisoning America’s Land. Farmers Fear ‘Forever’ Chemicals 
New York Times, 2024 

Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) National Institute of Environmental Health Sciences 

Risk Assessment of Pollutants in Sewage Sludge 
U.S. Environmental Protection Agency 

Draft Sewage Sludge Risk Assessment for PFOA and PFOS 
U.S. Environmental Protection Agency 

FAQ: Draft Sewage Sludge Risk Assessment for PFOA and PFOS U.S. Environmental Protection Agency 


CREDITS
Post-production services for waste(d)water provided by Two Aspen Audio. A special thank you to The Nature Conservancy Coda Fellows Sydney Bezanson and Juan Sebastián Gómez Gutiérrez for their contributions.