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process and apparatus for the use of sludge containing organic impurities formed essentially as a byproduct of the treatment of municipal sewage
process and apparatus for the use of sludge containing organic impurities formed essentially as a byproduct of the treatment of municipal sewage
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机译:含有有机杂质的污泥的处理方法和设备,这些污泥基本上是城市污水处理的副产品
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摘要
A process for the utilization of anaerobic digested sewage sludge which comprises: (a) heating the digested sewage sludge to at least 80 DEG C and then optionally cooling it from 80 to 40 DEG C; (b) separating the heat treated digested sewage sludge, optionally in the presence of a coagulant, to give a concentrate and a supernatant; (c) preparing a culture medium by adding to the supernatant a C1-C3 alcohol and a nitrogen-containing inorganic salt and, optionally, one or more water-soluble vitamin precursors or growth factors; (d) inoculating the culture medium with anaerobic digested sewage sludge; (e) anaerobically fermenting the inoculated culture medium at from 26 to 38 DEG C; (f) separating the biomass from the fermentation liquid formed during the fermentation. e
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