Affiliation:
1. Chongqing Jiaotong University
2. Chongqing University
Abstract
Abstract
In this study, we attempted to examine the dewaterability performances of sludge after pH/KMnO4 treatment, with the goal of understanding the dewaterability of strong oxidizers to waste activated sludge.With adjustment of pH, the impacts of different KMnO4 dosing on sludge dewatering are investigated.It plays good dewatering performance after treated by pH/KMnO4,which showed by capillary suction ti-mes (CST) decreased from 263.4s to 30.1s,and SRF fell by about 19.6%.The result perfomanced that the proteins and polysaccharides were significant decreased in tightly-bound EPS.Meanwhile,it was got that higher zeta potentials, and more obvious T2 after treatment.According to the changes of sludge’s physicochemical properties,and the variety of EPS,explained the mechanisms of improv-ed sludge dewatering under pH/KMnO4 conditions. Under the strong oxidation, the structure surrounding the bound water is oxidized and the bound water is released, so the dewaterability of the sludge is improved.
Publisher
Research Square Platform LLC
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