Wastewater as a source of energy

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Researchers at Pennsylvania State University have tested
success bacterial fuel cell through which they
product from wastewater, a current 72 watts per square meter.
Similar in design to the hydrogen fuel cell (both electrodes
separated by a proton exchange membrane), the device of
Bruce Logan and colleagues captures electrons naturally
released by bacteria in the organic matter digestion and
converts them into electricity. Certainly the current generated is still low,
but technology seems to evolve rapidly. Since they
submitted their results to the journal Science & Enviromental
Technology, researchers have made a leap forward and got more
350 of watts per square meter. According to them, the process could someday
be used in developing countries in small
wastewater treatment units that would ensure their own well
power supply. The food industry, especially
pig farms, as well as NASA, working on a project
similar for future long human space travel,
could also show interest.

WP 01 / 11 / 04 (Making
Power from wastewater)
http://www.washingtonpost.com/wp-dyn/articles/A14670-2004Oct31.html

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