Using bacteria to create a water filter that kills bacteria

Published Date : Jan 23, 2019

According to its developers at the Washington University in St Louis, a new water filter using bacteria to kill bacteria works twice as quickly as commercially available ultrasonic membranes. The experimental development of the Ultrafiltration membrane, using graph oxide and bacterial nanocellulose, which they found to be highly efficient, lasting and environmentally friendly, combined with their experts Srikanth Singamaneni, Professor of Engineering and Materials Science, and Youth-Shin Jun, Professor of Energy Engineering. If their technology was to be extended to a large extent, many developing countries could benefit from sparing clean water.

The new UL membrane cleans water and prevents bacteria and other harmful microorganisms from bio-fouling or accumulation that reduces the flow of water. If the technology is large, a study published in the journal Environmental Science & Technology would benefit many developing countries with some clean water.  

Nanocellulose Fibres Bolster Filter Process

Biofouling accounts for almost half of all membrane failure and is very difficult to completely eradicate. The researchers developed other membranes using gold nanostars previously, but wanted to design one with lower cost materials. Your new membrane will start with feeding a hindible substance from Gluconacetobacter hansenii bacteria to form cellulose nanofibers when they are in water.

The researchers were able to filter water twice as rapidly as commercially available ultrafiltration membranes with high quality nanocellulose fibers under high operational pressure while killing the bacteria.