title: Remediation of acid mine drainage using microbial fuel cell based on sludge anaerobic fermentation.
abstract: The aim of this work is to utilize the microbial fuel cell for removing metals and sulfate from acid mine drainage using sewage sludge organics and simultaneous electricity generation. The enriched sulfate-reducing mixed culture was used as the cathodic biofilm and the sludge as the substrate. Under anaerobic conditions, 71.2% sulfate, 99.7% heavy metals, and 51.6% total chemical oxygen demand are removed at an electrode spacing of 4 cm and a sludge concentration of 30% (v/v) after 10-day treatment. A maximum power density of 51.3 mW/m2is obtained. Approximately 79.5% of the dissipated sulfate is converted to element sulfur or polysulfides. The sulfide concentration is kept at below 20 mg-S/L. The concentrations of heavy metals are in the range of 0.02-0.06 mg/L in the effluent, which are far below the levels required by Chinese legislation. Microbial community analysis reveals that sulfate-reducing bacteria in Desulfuromonadales are dominant on the cathodic biofilm at the end of experiments. This study shows the potential of synchronous degradation of residual sludge and treatment of AMD with electricity harvesting.
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Peng
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.|b School of Tropical and Laboratory Medicine , Hainan Medical University , Haikou Hainan , People's Republic of China.
authors.forename: Tianle
authors.initials: T
authors.lastname: Tang
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Xiaoqiao
authors.initials: X
authors.lastname: Zhu
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Gaohui
authors.initials: G
authors.lastname: Jia
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Yanran
authors.initials: Y
authors.lastname: Ding
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Yawen
authors.initials: Y
authors.lastname: Chen
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: a College of Environment and Plant Protection , Hainan University , Haikou Hainan , People's Republic of China.
authors.forename: Wenhao
authors.initials: W
authors.lastname: Tang
mesh_terms: D001674:Bioelectric Energy Sources; D005285:Fermentation; D008906:Mining; D012722:Sewage; D013431:Sulfates
chemical_list: D012722:Sewage; D013431:Sulfates
keywords: MFC; SRB; Sulfate; heavy metals; sulfide