Pyrite activated peroxymonosulfate combined with as a physical-chemical conditioner modified biochar to improve sludge dewaterability: analysis of sludge floc structure and dewatering mechanism.

ABSTRACT: In this study, we proposed an advanced oxidation process of pyrite (FeS₂) and peroxymonosulfate (PMS) and prepared a modified polyaluminum chloride biochar (P-BC). The motivation is to use the combination of FeS₂ + PMS + P-BC to improve waste activated sludge (WAS) dewaterability. The method to improve the sludge dewatering effect with the combination of FeS₂ + PMS + P-BC is as follows: in the first step, pour 0.75 g/g TSS FeS₂ and 0.6 g/g TSS PMS into the sludge, and stir for 15 min. Then, add P-BC and stir for 5 min; complete the entire WAS processing process. The vacuum filtration test was used to evaluate the dehydration effect. The water content (Wc) and specific resistance to filtration (SRF) of the raw sludge can be reduced from the origin

SUBMITTER: Gao W 

PROVIDER: S-EPMC9153877 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature