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South Korean Researchers Create Clean Biodiesel from Sewage Sludge
Posted By Kristine Lofgren On September 3, 2012 @ 11:37 am In green technology,News,Poo Power!,Recycling / Compost,Renewable Energy | 1 Comment
Biodiesel is an excellent source of fuel: not only does it come from renewable sources , but it also burns cleaner, producing less pollution than fossil fuels . But it can be expensive to produce. That is set to change, however, as South Korean researchers recently developed a new way to source fuel from sewage sludge at a fraction of the cost of regular sources.
Although biodiesel  from sludge has been researched before, South Korean researchers at the Research Institute of Industrial Science and Technology  figured out a new way to extract lipids, the compounds used to create biodiesel, using sludge at a local wastewater treatment plant. The process involves using heat to extract the lipids, rather than using catalysis, the method previously used.
According to Kwon, one of the researchers involved in the study, the process opens up new options in recycling waste . “Waste is not simply waste—it can be converted into useful resources like biodiesel,” says Kwon. Rafael Hernandez  of Mississippi State University , who has also worked on producing biofuel from sludge, cautions that due to the varying concentration of lipids from treatment plant to treatment plant, the cost could vary and notes that the new process seems to be “very encouraging.”
Today, biofuel is created using vegetable oils, like rapeseed oil or soybean oil, or animal fat, which costs an average 80 cents to make. Sewage sludge , on the other hand, costs only 3 cents due to its high lipid content – a difference that makes it an attractive option.
via Chemical and Engineering News 
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 renewable sources: http://inhabitat.com/iceland-gets-99-5-of-its-energy-from-renewable-sources-but-how-clean-is-it/
 producing less pollution than fossil fuels: http://inhabitat.com/los-angeles-cuts-vehicle-pollution-by-a-massive-98-since-1960/
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 biodiesel: http://inhabitat.com/16-year-old-egyptian-scientist-finds-way-to-turn-plastic-waste-into-78-million-of-biofuel/
 Research Institute of Industrial Science and Technology: http://www.rist.re.kr/eng/
 recycling waste: http://inhabitat.com/david-mach%E2%80%99s-gigantic-sculpture-is-a-wave-of-recycled-magazines/
 Rafael Hernandez: http://www.che.msstate.edu/people/faculty/rafael-hernandez/
 Mississippi State University: http://www.msstate.edu/
 Sewage sludge: http://inhabitat.com/osus-new-microbial-fuel-cell-can-generate-10-50-times-more-power-from-wastewater/
 Chemical and Engineering News: http://cen.acs.org/articles/90/web/2012/08/Biodiesel-Sewage-Sludge.html
 Jon Rostron: http://www.geograph.org.uk/profile/32907
 Rennett Stowe: http://www.fotopedia.com/items/flickr-2914576943
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