The low temperature thermo chemical conversion process for sewage sludge, through which the energy can be expected to be recovered, is a new developing technology.
污水厂污泥低温热化学转化是可望达到能量平衡的污泥处理新技术。
In cases where sewage sludge is used, expensive chemical fertilizer use can be avoided, he said. The sludge contains the same critical nutrients-nitrogen, phosphorous, and potassium.
有时候，人们用下水道污泥来代替昂贵的化学肥料，其中一样含有重要的营养成分——氮，磷和钾。
Residual products of the chemical or allied industries, not elsewhere specified or included; municipal waste; sewage sludge; other wastes specified in Note 6 to this Chapter.
其他税目未列名的化学工业及其相关工业的副产品；城市垃圾；下水道淤泥；本章注释六所规定的其他废物。
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