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Gravity-Driven Membrane (GDM) technology

Inadequate access to microbiologically safe drinking water continuously threatens the health and well-being of more than a billion people, primarily in developing countries. Decentralized water treatment can be used in regions where central water infrastructure is not available at all, or not reliable. Ultrafiltration is an effective technology to treat water and in principle can be applied on a decentralized scale. During dead-end ultrafiltration all macro- and microorganisms, particles and colloids accumulate on the membrane surface and a fouling layer is formed. Conventionally, the membrane is prevented from clogging through backflushing or chemical cleaning. However, backflushing or cleaning results in complex and maintenance-intensive systems, which are difficult to operate on a long term in developing countries. This project develops gravity-driven membrane (GDM) technology for water treatment, a technology which does not require backflushing or cleaning. GDM technology is an attractive solution for household and community drinking water treatment, particularly in developing countries. Read more