title: Effect of iron-manganese-sepiolite as heterogeneous Fenton-like catalyst on the performance and microbial community of anaerobic granular sludge treatment system.
abstract: Both short-term and long-term exposure experiments have been carried out to investigate the influence of iron (Fe)-manganese (Mn)-sepiolite, as a heterogeneous Fenton-like catalyst, on the performance and microbial community of anaerobic granular sludge. During the short-term exposure experiments, chemical oxygen demand (COD) removal efficiency decreased from 73.1% to 64.1% with the presence of 100mg/L of catalyst. However, long-term exposure to the catalyst did not significantly affect the COD removal efficiency (81.8%) as compared to the control (83.5%). Meanwhile, the absorption peaks of coenzyme F420 in extracellular polymeric substances (EPS) of sludge samples were remarkable by excitation-emission matrix (EEM) fluorescence spectra. After long-term exposure, the presence of the catalyst increased secretions of EPS from 83.7mg/g VSS to 89.1mg/g VSS. Further investigations with high throughput sequencing indicated that the abundance of Methanosaeta increased from 57.7% to 70.4% after long-term exposure. In bacterial communities, Proteobacteria, Firmicutes, and Synergistetes were predominant.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China; School of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China. Electronic address: suchengyuan2008@126.com.
authors.forename: Chengyuan
authors.initials: C
authors.lastname: Su
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
authors.forename: Weiguang
authors.initials: W
authors.lastname: Li
authors.affiliation: School of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
authors.forename: Menglin
authors.initials: M
authors.lastname: Chen
authors.affiliation: School of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Huang
authors.affiliation: School of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wu
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism; D057919:Biological Oxygen Demand Analysis; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D017633:Magnesium Silicates / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D059013:Microbial Consortia / Q000502:physiology*; D011108:Polymers / Q000737:chemistry; D012722:Sewage / Q000382:microbiology*; D013050:Spectrometry, Fluorescence; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods
chemical_list: C045076:Fenton's reagent; D017633:Magnesium Silicates; D011108:Polymers; D012722:Sewage; D008345:Manganese; D006861:Hydrogen Peroxide; C001671:magnesium trisilicate; D007501:Iron
keywords: Anaerobic granular sludge; Exposure experiments; Extracellular polymer substrates; Heterogeneous Fenton-like catalyst; Microbial community