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Better methods of dewatering and disposing of these sludges are needed .

需要研究更好的污泥脱水和处置方法。

Typically these sludges settle rapidly but do not compact very well .

这些污泥一般沉降迅速，但并不很紧密。

Characterization of sludges - detection and enumeration of escherichia coil and salmonella spp. in sludges , soils soil improvers , growing media and biowastes .

在淤泥、土壤、土壤改良液、生长媒介和生态垃圾中大肠杆菌和沙门氏菌的检测与计数。

Silver in photographic films , papers , fixing baths , sludges , or residues , determination of .

摄影胶片、相纸、定影液、污泥或残留物中银的测定。

To find out the pollution sources by biological monitoring , a trial of potted rice has been carried out using wastewaters and sludges from 5 factories .

采用生物监测方法查找污染源，用5个工厂的污水和污泥进行盆栽水稻试验。