A COMPANY that designed a water-purification system for the International Space Station (ISS) is developing spin-off technologies with the potential to provide clean drinking water in the places that need it most.

On the ISS, every drop of moisture, from humidity to urine, has to be filtered and reused. But the current system is very heavy, has to be replaced every 90 days, and fails to filter out certain contaminants, according to NASA.

Danish company Aquaporin A/S has developed a new system that uses proteins called aquaporins. “It is essentially the mechanism that allows water to cross the cell membrane of living cells,” says Peter Holme Jensen, CEO of Aquaporin A/S. In nature, these proteins allow plant roots to absorb water from soil, and let the two human kidneys together filter about 170 liters of fluid per day. They are also very selective, preventing contaminants from passing through.

Having tested it in space, NASA is considering replacing its current system with Aquaporin’s, but the technology is also finding uses closer to home.

The company is working with wastewater companies — including BIOFOS, Denmark’s largest state-owned wastewater utility, and UTB Envirotec in Hungary — to remove micropollutants and microplastics from wastewater, preventing them from flowing into the sea.

Last year, Aquaporin A/S launched an under-the-sink household filtration system that works without electricity. The system costs US$788 and the company is currently targeting the European market. (SD-Agencies)