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Improved dewaterability of sewage sludge by Fe(II)‐activated persulfate oxidation combined with polymers
Author(s) -
Wang Huiliang,
Liu Changgeng,
Wu Zening,
Yang Wanquan,
Chen Cheng
Publication year - 2017
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12266
Subject(s) - persulfate , chitosan , chemistry , filtration (mathematics) , polymer , activated sludge , chloride , chemical engineering , nuclear chemistry , sewage sludge , pulp and paper industry , sewage treatment , organic chemistry , environmental engineering , environmental science , catalysis , statistics , mathematics , engineering
The combination of Fe(II)‐activated persulfate oxidation with polymers potentially applied to enhance sludge dewaterability was investigated in this work. The experiments mainly concentrated on their efficacies and the optimization of the major operational parameters. The results showed that the combination was efficient, especially when polyaluminium chloride (PAC) and chitosan were used as polymers. The optimal conditions of this process under experimental conditions were atFe 2 + = 50 mg/g (dry solids),S 2O 8 2 − = 125 mg/g, reaction time = 20 min, PAC = 125 mg/g and chitosan = 100 mg/g, under which the specific resistance to filtration (SRF) with a reduction efficiency of 94.87% was achieved.