Recycling industrial waste water

Space Daily via SPX: A research group composed of Dr. Martin Prechtl, Leo Heim and their colleagues at the University of Cologne's Department of Chemistry has discovered a new method of generating hydrogen using water and formaldehyde.

The generation of hydrogen from liquids is of particular interest when it comes to fuel cell technologies. The results of the project, entitled "Selective and mild hydrogen production using water and formaldehyde", have recently been published in the journal Nature Communications.

Among other applications, the new approach can be used to recycle industrial waste water contaminated by formaldehyde to break down the contaminants whilst simultaneously generating hydrogen.

With the aid of this method, it is possible to reclaim an important raw material from industrial waste water. Prechtl and his colleagues have also identified an air-stable and robust catalyst that can be employed with the technique. The researchers have already filed a corresponding patent application....

A water treatment plant at Bret Lake, Switzerland, shot by Rama, Wikimedia Commons,  under the Creative Commons Attribution-Share Alike 2.0 France license

Powerful storm and power shortages fill Gaza with waste water

IRIN: Hamdi Al Shami, 54, woke up in the highly populated Zeitoun area of Gaza City, on 11 December, to find raw sewage flowing down his street at a height of more than 2m. It was just one of several sewage overflows to occur in his neighbourhood over the last five weeks.

On 13 November, more than 35,000 cubic metres of raw sewage overflowed when the Zeitoun pumping station failed, affecting 3,000 nearby residents. Just as the mess was being cleaned up, the area was again inundated - this time with approximately twice as much waste - when heavy rains fell over the Gaza Strip between 11 and 15 December. In Gaza City, one of the worst-hit areas, the municipality estimated that hundreds of thousands of cubic metres of sewage and rainwater overflowed from pumping stations and manholes, flooding streets and homes.

“It was horrible. We lost many things when the sewage came from everywhere around us - the doors, manholes and sinks. This cannot be forgotten,” said Al Shami, speaking about November’s flooding.

That flooding was attributed to a combination of factors: power outages disrupting the city’s sewage pumps and a shortage in capacity, spare parts and facilities because of a seven-year blockade against Gaza. At the time, residents were told that a rapidly established power connection to the Israeli grid would prevent future problems. But with the recent rainfall, the situation in Al Shami’s neighbourhood has only worsened. He was stranded amid water and sewage for days....

Destruction in Gaza after Israeli bombardment, part of Operation Pillar of Defense in November 2012, photo by Scott Bobb, Voice of America