title: Enhancing the CH4 yield of anaerobic digestion via endogenous CO2 fixation by exogenous H2.
abstract: A large amount (25-60%) of degraded organics is converted directly to CO2 during anaerobic digestion (AD) process, which substantially lowers the energy (methane, CH4) yield. In this study, endogenous CO2 fixation by H2 from in-situ iron corrosion was explored to enhancing the CH4 yield. The results demonstrated that a substantial enhancement (up to 61%) in the CH4 yield could be achieved with both nano-scale zero-valent iron (NZVI) and waste iron scraps (WIS) being the added iron. Additionally, the added iron could also achieve effective phosphorus removal from the AD supernatant.
authors.affiliation: Beijing University of Civil Engineering and Architecture/Beijing Climate Change Research and Education Centre, Beijing 100044, PR China.
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Beijing University of Civil Engineering and Architecture/Beijing Climate Change Research and Education Centre, Beijing 100044, PR China. Electronic address: xdhao@hotmail.com.
authors.forename: Xiaodi
authors.initials: X
authors.lastname: Hao
authors.affiliation: Beijing University of Civil Engineering and Architecture/Beijing Climate Change Research and Education Centre, Beijing 100044, PR China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhao
authors.affiliation: Beijing University of Civil Engineering and Architecture/Beijing Climate Change Research and Education Centre, Beijing 100044, PR China.
authors.forename: Kunming
authors.initials: K
authors.lastname: Fu
mesh_terms: D000693:Anaerobiosis; D002245:Carbon Dioxide / Q000378:metabolism*; D004063:Digestion; D006859:Hydrogen / Q000378:metabolism*; D007501:Iron; D008697:Methane / Q000378:metabolism*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage; D002245:Carbon Dioxide; D006859:Hydrogen; D007501:Iron; D008697:Methane
keywords: Anaerobic digestion; Carbon fixation; Hydrogen; Iron corrosion; Waste activated sludge