title: Sewage sludge pretreatment by microwave irradiation combined with activated carbon fibre at alkaline pH for anaerobic digestion.
abstract: This research focuses on the effects of microwave-assisted activated carbon fibre (ACF) (MW-ACF) treatment on sewage sludge at alkaline pH. The disintegration and biodegradability of sewage sludge were studied. It was found that the MW-ACF process at alkaline pH provided a rapid and efficient process to disrupt the microbial cells in the sludge. The results suggested that when irradiated at 800 W MW for 110 s with a dose of 1.0 g ACF/g solid concentration (SS) at pH 10.5, the MW-ACF pretreatment achieved 55% SS disintegration, 23% greater than the value of MW alone (32%). The concentration of total nitrogen, total phosphorus, supernatant soluble chemical oxygen demand, protein, and polysaccharide increased by 60%, 144%, 145%, 74%, and 77%, respectively. An increase in biogas production by 63.7% was achieved after 20 days of anaerobic digestion (AD), compared to the control. The results indicated that the MW-ACF pretreatment process at alkaline pH provides novel sludge management options in disintegration of sewage sludge for further AD.
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Dedong
authors.initials: D
authors.lastname: Sun
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Sixiao
authors.initials: S
authors.lastname: Guo
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Nina
authors.initials: N
authors.lastname: Ma
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Guowen
authors.initials: G
authors.lastname: Wang
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Chun
authors.initials: C
authors.lastname: Ma
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Jun
authors.initials: J
authors.lastname: Hao
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Mang
authors.initials: M
authors.lastname: Xue
authors.affiliation: School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail: sundedong@sina.com.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Zhang
mesh_terms: D001673:Biodegradation, Environmental; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D002606:Charcoal / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008872:Microwaves; D012722:Sewage / Q000032:analysis*; D012995:Solubility; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*
chemical_list: D000077482:Carbon Fiber; D012722:Sewage; D002606:Charcoal; D002244:Carbon