Engineers have created a bacteria-filtering membrane using graphene oxide and bacterial nanocellulose. It's highly efficient, long-lasting and environmentally friendly -- and could provide clean water ...

Water filters on the market today can't always stop bacteria from passing through. The problem is a structural one. It's hard to get the pore sizes to align properly, leaving room for the pathogens to ...

A novel water filter that uses bacteria to kill bacteria works twice as fast as commercially available ultrafiltration membranes according to its developers at Washington University in St Louis. The ...

A low-cost water purification membrane capable of filtering out objects greater than one micron size and also killing E. coli bacteria has been developed by the Bangalore-based Indian Institute of ...

Coliform Bacteria: Less than one total coliform organism per 100 ml of water. Non-coliform Bacteria: Concentrations less than 200 organisms per 100 ml of water considered acceptable as long as the ...