Chinese scientists have developed a technology that can
effectively turn sewage water and mud, two main headaches of
urbanization, into organic fertilizer and high value
pesticide.
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The closed microorganism aerobic fermentation technology, developed
by a research group headed by professor Chen Liqiao of the
Shanghai-based Huadong Teachers' University, has passed a technical
appraisal by experts of the Shanghai Municipal Science and
Technology Committee recently.
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Experts spoke highly of the technology, saying it can remove the
odor of sewage and mud, and turn waste into resources.
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Experiments by the Shanghai Sewage Water Treatment Plant show that
disposing of mud with the new technology can generate 150 yuan
(US$18.13) per ton.
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Currently, China's sewage treatment plants discharge more than nine
million tons of mud annually and the figure is rising by an average
10 percent year on year.
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Two methods are now used to deal with increasing urban sewage water
and mud in China: incinerating and burying underground.?
(Xinhua News Agency February 20, 2005)