top of page

2022 Summit Recordings 

Watch recordings of the presentations and check out the discussion saved from the chat in accompanying PDFs below. 


Pipe Dream to Mainstream: Reporting on the Urine Revolution

Chelsea Wald

Science journalist Chelsea Wald is the author of the book Pipe Dreams: The Urgent Global Quest to Transform the Toilet (Avid Reader Press/Simon & Schuster, 2021) and the Nature feature The urine revolution: how recycling pee could help to save the world (2022). For nearly a decade, she has repeatedly plunged into the topic of toilets, since editors first approached her to write about the latent potential in our stagnating infrastructure. Since then she has traveled to Italy, South Africa, Indonesia, and Haiti, as well as throughout the Netherlands and the United States, in search of the past and future of toilet systems. She has donated her urine to a urine-donation scheme in the Netherlands and visited several urine-diversion projects. With a degree in astronomy from Columbia University and a master’s in journalism from Indiana University, Chelsea has more than fifteen years of experience in writing about science and the environment. She has won several awards and reporting grants, including from the Society of Environmental Journalists, the European Geosciences Union, and the European Journalism Centre. She cofounded and continues to help coordinate the DC Science Writers Association Newsbrief Awards for short science writing. She lives with her family in the Netherlands, in a region renowned for its water-related innovations. 

Pipe Dream to Mainstream: Reporting on the Urine Revolution

Chelsea Wald

Community Knowledge & Social Change 


Initial Findings from Rich Earth’s ‘Urine My Garden’  Community Science Survey

Julia Cavicchi & Tatiana Schreiber, Rich Earth Institute, US

Urban Cycles - A Citizen Science Project for sustainable fertilization with urine-based recycling fertilizers in urban gardens in Berlin

Corinna Schröder, Leibniz Institute for Vegetable and Ornamental Plant Cultivation, Germany

​A glimpse into global sanitation justice initiatives

Sarah Nahar, Syracuse University, US

​Urban uses of urine as a fertilizer: an field study in France

Marine Legrand, LEESU, Ecole des Ponts ParisTech, Research and animation Fellow (OCAPI Program), France

Undergraduates Value Learning about Regenerative Sanitation Systems: Insights for Teaching about Urine-derived Fertilizers

Hayley Joyell Smith, University of Georgia & PHLUSH, US & Jamina Shupack, US

Urine Research Facilities

Video Tours

University of Michigan

Lucinda Li, University of Michigan, US

Stanford University

Kindle Williams, Stanford University, US

Cornell University

Rebecca Nelson, Eli Newell, Andrew Hubble, Alyssa Kim 

Progress in Tech Research 

Part 1: Contamination Removal

Influence of organics removal on pharmaceutical adsorption

Aurea Heusser, Eawag - Swiss Federal Institute of Aquatic Science and Technology, Switzerland

Feasibility study of powdered activated carbon membrane bioreactor (PAC-MBR) for source-separated urine treatment: a comparison with MBR

Jiaxi Jiang, University of Technology Sydney (UTS), Australia

Fate of organic contaminants in electrochemical nitrogen recovery processes treating urine

Anna Kogler, Stanford University, US​

Removal of antibiotics from nitrified real human urine by GAC

Abdulaziz Almuntashiri, University of Technology Sydney, Australia

Progress in Tech Research 

Part 2: Resource Recovery 

Compact and high-performance activated carbon incorporated membrane bioreactor with the addition of biofilm carriers

Weonjung Sohn, University of Technology Sydney, Australia


Scaling up an electrochemical nitrogen recovery process from lab benchtop to pilot wastewater plant

Kindle Williams, Stanford University, US

A hybrid nanofiltration and reverse osmosis process for urine
treatment: Effect on urea recovery and purity

Caitlin Courtney, University of Cape Town, South Africa

Bacterial succession in human fecal waste composting

Greg Caporaso & Jeff Meilander, Northern Arizona University, US

Urine storage conditions influence nitrogen adsorption and plant uptake in urine-enriched biochars

Elena Bischak, University of California, Merced, US

Implementation Projects


ARC Research Hub for Nutrients in a Circular Economy (ARC NiCE Hub): project progress and perspectives

Hokyong Shon, Australian Research Council, Australia

VunaNexus: examples of large scale applications of urine nitrification

Nadège de Chambrier, VunaNexus AG, Switzerland

Urocyclus, Overview of an Ongoing Urine Recycling Project

Valentin Aubois-Liogier, University of Tours, France

Nitrification of urine and co-composting of nitrified urine in the zirkulierBAR project

Carsten Beneker, Kreiswerke Barnim GmbH, Germany

Lactopi Start: the first European-wide registered microbial biostimulant using urine as growth medium

Julien Saludas, Toopi Organics, France

“Pee for the Peonies”: Demonstration of urine-derived fertilizer on peony plants

Juliana Marks, University of Michigan, US

Brightwater Tools Urine Pasteurizer

Abe Noe-Hays, Brightwater Tools, US

Urine Diversion Tools


LAUFEN Urine-Diverting Toilets

Cristiane Kopp & Marc Richterich, LAUFEN AG, Switzerland


P-POD waterless in-wall urinal and other UD systems to reduce pollution on Cape Cod, MA

Earle Barnhart & Hilda Maingay, Green Center, US

Urine-Diverting Toilet Design

Jason Kass, Toilets For People, US

Enter the Nytrogen cycle with the ORIAZ Solar-Dripper

Robert Cossette, ORIAZ Solar-Dripper, France

ODM - Open Design Toilet Mold - The toilet revolution for the bottom of the pyramid

Lotte Kristoferitsch, EOOS NEXT, Austria

Impacts & Decision-Making Tools


Ocean Sewage Alliance Knowledge Hub

Kassie Morton, The Nature Conservancy, US

Impact of urine diversion and conversion to fertiliser products in Sydney Central Park

Umakanth Badeti, University of Technology Sydney, Australia

The potential role of urine separation in improving nutrient circularity in New York City

Lucinda Li, University of Michigan, US

Nutrient stocks, flows and balances for the Bolivian agri-food system: Can recycling human urine close the nutrient circularity gap?

Luis Perez-Mercado; Prithvi Simha, Swedish University of Agricultural Sciences, Universidad Mayor de San Simon, Sweden/Bolivia

Benefits of urine diversion for rural housing on septic systems

Merilee D. Karr, PHLUSH (Public Hygiene Lets Us Stay Human), US

Egestabase – Navigating technologies for recovery and reuse of plant nutrients from human excreta and wastewater

Jennifer McConville, Swedish University of Agricultural Sciences, Sweden

bottom of page