TECHNOLOGICAL PROCEDURE OF DEWATERING SLUDGES FROM WASTE WATER OR SEWAGE TREATMENT PLANTS BY MAKING USE OF POLYETHYLENE OXIDE

摘要

The solution relates to the use of high molecular weightpolyethylene oxide and reactive chemical cofactor,such as phenolic resin or betonite,for sludge dewatering.Various wood extracts obtained from wood cookingsuch as black sulfate or sulfiteleachate may also be used as reactivechemical-cofactor for polyethyleneoxy. Reactionpolyethylene oxide and cofactor in sludgethe suspension causes flocculation of the sludge and thereby createsconditions for easy sludge drainage and at the same timeit will increase the retention of sludge fines in the sludgecakes. This effect may be advantageousused for drainage of industrial aurban sludge.