Solar-powered membrane technology offers an off-grid solution
Researchers at the University of Ghent in Belgium have developed an innovative solar-powered system that converts human urine into potable water and valuable fertilizer—a breakthrough technology with promising applications for remote communities and developing nations.
What sets this approach apart from conventional wastewater treatment methods is its use of a specialized membrane combined with solar energy, making it both energy-efficient and practical for locations without access to electrical infrastructure.
“We can extract both fertilizer and drinking water from urine through a straightforward process powered entirely by solar energy,” explained Sebastiaan Derese, a researcher at the University of Ghent.
As explained here, the system works by collecting urine in a large storage tank and heating it with a solar-powered boiler. The heated liquid passes through a membrane that separates clean water from essential nutrients, including potassium, nitrogen, and phosphorus.
The research team recently field-tested their technology at a 10-day music and theater festival in downtown Ghent under the campaign hashtag #peeforscience. The machine successfully processed festival-goers’ urine, recovering 1,000 liters of clean water.
Looking ahead, Derese envisions scaling up the technology for installation in high-traffic venues like sports stadiums and airports. More importantly, the team plans to deploy the system in rural areas of developing countries where both fertilizer and safe drinking water remain scarce resources.
Staying true to their earlier research projects, the team will put the festival’s reclaimed water to a uniquely Belgian use—brewing beer.
“We call it ‘from sewer to brewer,'” Derese quipped.