Features of sewage sludge dewatering process at the use offlocculant based on epichlorohydrinand dimethylamine

Abstract

The paper presents the results of experimental studies on the use of new synthesized reagent based on epichlorohydrin(chloropropylene oxide) and dimethylamine at the mechanical sludge dewatering unit; the effect of the residual flocculant content on sludge dewatering process is determined. In particular, it was found that the use of the proposed reagent led to increase in the efficiency of settling industrial effluents at the primary settling unit up to 95%; it had a beneficial effect on further wastewater treatment at biological treatment facilities, which led to 1.5-fold decrease in the consumption of flocculant. The use of this reagent made it possible to achieve a high degree of dewatering of sewage sludge and reduce the moisture content of the formed cake from 98 to 73%. Consequently, this allowedto significantlydecrease the volume of sludge further placed in sludge collectors and to reduce the amount of land allotted for its disposal.