MANN+HUMMEL has more than 75 years of experience in the area of filtration and today is a leading global filtration specialist. They develop solutions for motor cars and industrial applications and enable clean air in interior spaces and the sustainable use of water.

In 2008, MANN+HUMMEL recognized that polyacrylonitrile (PAN) membranes were increasingly used in the water filtration market, which had a clear cost advantage over state of the art polymer membranes. EMI Twente was requested to develop hollow fiber membranes from PAN for the application in the water filtration market. An important requirement was the use of solvents that did not fall under the REACH regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals). After successfully obtaining a proof of principle on the lab scale, the membrane was in a second phase further optimized and scaled up to the pilot scale. The final membrane met the targeted specifications and showed good reproducible water permeability, chemical durability (e.g. NaOCl-cleaning) and a nearly 8 log bacteria reduction. In 2010, they entered the water filtration membrane market with the acquisition of Singapore-based Ultra-Flo, which developed and produced hollow fiber membranes and systems for the water filtration market. Since 2015 MANN+HUMMEL also has full ownership of Microdyn-Nadir, a global supplier of membranes and modules for MF, UF and NF applications.