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WATER WORLD
UBC invention uses bacteria to purify water
by Staff Writers
Vancouver, Canada (SPX) Apr 10, 2017


This is UBC civil engineering professor Pierre Berube (left) and his graduate student Lukas Dossegger. Image courtesy Clare Kiernan/University of British Columbia.

A University of British Columbia-developed system that uses bacteria to turn non-potable water into drinking water will be tested next week in West Vancouver prior to being installed in remote communities in Canada and beyond.

The system consists of tanks of fibre membranes that catch and hold contaminants--dirt, organic particles, bacteria and viruses--while letting water filter through. A community of beneficial bacteria, or biofilm, functions as the second line of defence, working in concert to break down pollutants.

"Membrane treatment can remove over 99.99 per cent of contaminants, making them ideal for making drinking water," said project lead Pierre Berube, a UBC civil engineering professor who developed the system with support from the federally funded Canada-India research organization IC-IMPACTS.

Membrane water treatment is not new, but Berube says the modifications developed by his team, described recently in Water Research, produce an even more effective solution.

"Our system is the first to use gravity to scour and remove captured contaminants, which otherwise accumulate and clog the membrane. It's low-maintenance and as efficient as conventional approaches that need chemicals and complex mechanical systems to keep the membranes clean," said Berube.

"The biofilm also helps by essentially eating away at the captured contaminants. You just open and close a few valves every 24 hours in order to 'lift' the water and let gravity and biology do their thing. This means significant savings in time and money over the lifetime of the system."

West Vancouver was chosen for pilot testing because of its proximity, but the eventual goal is to install similar systems for communities where clean drinking water is hard to come by.

"Access to clean drinking water is a constant challenge for millions of people around the world. Our goal is to provide a model for low-cost, effective water treatment for communities, and to help locals help themselves as they build, operate and even expand their water treatment plants," said Berube.

"Operation of passive membrane systems for drinking water treatment" was published February 2017 in Water Research.

WATER WORLD
Dead Sea to come alive with concert by electro pioneer
Jerusalem (AFP) April 6, 2017
The Dead Sea was to come alive with music and an extravagant light show Thursday with a concert by electro pioneer Jean-Michel Jarre to draw attention to its shrinking water levels. Jarre was set to take the stage in front of the ancient Masada fortress next to the Dead Sea late Thursday for a show that will include a range of performers and stretch into the wee hours of Friday. He told ... read more

Related Links
University of British Columbia
Water News - Science, Technology and Politics


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