title: Simultaneous chemical oxygen demand removal, methane production and heavy metal precipitation in the biological treatment of landfill leachate using acid mine drainage as sulfate resource.
abstract: Biological treatment played an important role in the treatment of landfill leachate. In the current study, acid mine drainage (AMD) was used as a source of sulfate to strengthen the anaerobic treatment of landfill leachate. Effects of chemical oxygen demand (COD) and SO42-mass concentration ratio on the decomposition of organic matter, methane production and sulfate reduction were investigated and the microbial community was analyzed using the high throughout methods. Results showed that high removal efficiency of COD, methane production and heavy metal removal was achieved when the initial COD/SO42-ratio (based on mass) was set at 3.0. The relative abundance of anaerobic hydrogen-producing bacteria (Candidatus Cloacamonas) in the experimental group with the addition of AMD was significantly increased compared to the control. Abundance of hydrogenotrophic methanogens of Methanosarcina and Methanomassiliicoccus was increased. Results confirmed that AMD could be used as sulfate resource to strengthen the biological treatment of landfill leachate.
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Li
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China. Electronic address: zbyue@hfut.edu.cn.
authors.forename: Zheng-Bo
authors.initials: ZB
authors.lastname: Yue
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Tao
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Hai-Bin
authors.initials: HB
authors.lastname: Yang
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Yue-Fei
authors.initials: YF
authors.lastname: Zhou
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
authors.forename: Tian-Hu
authors.initials: TH
authors.lastname: Chen
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D011232:Chemical Precipitation; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification* / Q000378:metabolism*; D008697:Methane / Q000096:biosynthesis*; D008906:Mining; D013431:Sulfates / Q000378:metabolism*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D013431:Sulfates; D014874:Water Pollutants, Chemical; D008697:Methane
keywords: Acid mine drainage; Anaerobic digestion; Chemical oxygen demand/sulfate ratio; High-throughput sequencing; Landfill leachate