title: [Sewage sludge conditioning by bioleaching combined with Fenton-like oxidation].
abstract: Bioleaching combined with Fenton-like oxidation was used to condition sewage sludge. The results showed that it took approximately 1 d to decrease pH from 6.9 to 2.5 by bioleaching, with fixed sulfur power and FeSO4 x 7H2O dosages of 3 g x L(-1) and 8 g x L(-1), respectively. After bioleaching, the volatile solids(VS) reduction was 13.4%, and the specific resistance to filtration(SRF) dropped from 3.1 x 10(9)s2 x g(-1) to 1.5 x 10(9)s2 x g(-1) with a reduction of 51.6%, but the bioleached sludge was still difficult to be dewatered. The bioleached sludge was further oxidized by Fenton-like oxidation. The results indicated that the optimal H2O2 dosage and reaction time were 3.3 g x L(-1) and 60 min, respectively. Under the optimal conditions, VS reduction was 30.8%, SRF was declined to 1.9 x 10(8) s2 x g(-1) with a reduction of 93.9%, and the moisture of sludge cake was 76.9%. After treated by bioleaching combined with Fenton-like oxidation, the dewaterability and stability of sewage sludge were significantly improved. Besides, the combined technology was more efficient in conditioning sewage sludge than single Fenton-like oxidation.
authors.forename: Chang-geng
authors.initials: CG
authors.lastname: Liu
authors.forename: Pan-yue
authors.initials: PY
authors.lastname: Zhang
authors.forename: Jiao-jiao
authors.initials: JJ
authors.lastname: Jiang
authors.forename: Cheng-hua
authors.initials: CH
authors.lastname: Zeng
authors.forename: Yi
authors.initials: Y
authors.lastname: Huang
authors.forename: Guo-yin
authors.initials: GY
authors.lastname: Xu
mesh_terms: D005374:Filtration; D006861:Hydrogen Peroxide; D010084:Oxidation-Reduction; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage; D006861:Hydrogen Peroxide