title: Changes in bacterial and archaeal communities in anaerobic digesters treating different organic wastes.
abstract: The goal of this study was to characterize microbial communities in anaerobic batch digesters treating different representative organic sources (sewage sludge, food waste, septage). Among the digesters, the anaerobic digester of food waste had the highest methanogen density, producing a peak value methane yield of 813.2mLCH4/gVS. In all the digesters, acetoclastic Methanosarcinales and hydrogenotrophic Methanomicrobiales were the most dominant methanogen groups, but their proportion among the methanogens varied depending on the organic sources. The bacteria community in the anaerobic digestion (AD) of food waste and septage was distinctly different from that found in the AD of sewage sludge (primary sludge and waste activated sludge). Shifts in both bacterial and archaeal community structures could be related to differences in chemical properties, production, and accumulation of intermediates digested from organic wastes having different characteristics. These findings could prove useful in optimizing the microbial community to enhance AD process treating organic wastes.
authors.affiliation: School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Buk-gu, Gwangju 500-712, Republic of Korea.
authors.forename: Young Mo
authors.initials: YM
authors.lastname: Kim
authors.affiliation: School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 790-784, Republic of Korea.
authors.forename: Hyun Min
authors.initials: HM
authors.lastname: Jang
authors.affiliation: Department of Civil and Environmental System Engineering, Konkuk University, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Kwanyong
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Civil and Environmental System Engineering, Konkuk University, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Phrompol
authors.initials: P
authors.lastname: Chantrasakdakul
authors.affiliation: Department of Civil and Environmental System Engineering, Konkuk University, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Daegi
authors.initials: D
authors.lastname: Kim
authors.affiliation: Department of Civil and Environmental System Engineering, Konkuk University, Gwangjin-gu, Seoul 143-701, Republic of Korea. Electronic address: kypark@konkuk.ac.kr.
authors.forename: Ki Young
authors.initials: KY
authors.lastname: Park
mesh_terms: D000693:Anaerobiosis; D001105:Archaea / Q000254:growth & development*; D019149:Bioreactors / Q000382:microbiology*; D008697:Methane / Q000032:analysis*; D017018:Methanomicrobiales / Q000254:growth & development*; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology
chemical_list: D012722:Sewage; D008697:Methane
keywords: Anaerobic digestion; Biogas; DGGE; Microbial community; qPCR