title: Effect of volumetric organic loading rate (OLR) on H2and CH4production by two-stage anaerobic co-digestion of food waste and brown water.
abstract: Two-stage anaerobic digestion system consisting of two continuously stirred tank reactors (CSTRs) operating at mesophillic conditions (37°C) were studied. The aim of this study is to determine optimum Hydraulic Retention Time (HRT) of the two-stage anaerobic digester system for hydrogen and methane production. This paper also discusses the effect of OLR with change in HRT on the system. Four different HRTs of 48, 24, 12, 8h were monitored for acidogenic reactor, which provided OLR of 17.7, 34.8, 70.8, 106gVS/L·d respectively. Two HRTs of 15days and 20days were studied with OLR of 1.24 and 1.76gVS/L·d respectively in methanogenic reactor. Hydrogen production at higher OLR and shorter HRT seemed favorable 106gVS/L·d (8h) in acidogenic reactor system. In methanogenic reactor system HRT of 20day with OLR of 1.24gVS/L·d was found optimum in terms of methane production and organic removal. The result of this study illustrated the optimum HRT of 8h and 20days in acidogenic stage and methanogenic stage for maximum hydrogen and methane production.
authors.affiliation: Department of Environmental Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 641-773, Republic of Korea.
authors.forename: Sachin
authors.initials: S
authors.lastname: Paudel
authors.affiliation: Department of Eco-friendly Offshore FEED Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 641-773, Republic of Korea.
authors.forename: Youngjun
authors.initials: Y
authors.lastname: Kang
authors.affiliation: Advanced Environment Technology Research Department, Korea Institute of Construction Technology, Goyang 10223, Republic of Korea.
authors.forename: Yeong-Seok
authors.initials: YS
authors.lastname: Yoo
authors.affiliation: Department of Environmental Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 641-773, Republic of Korea. Electronic address: gts@changwon.ac.kr.
authors.forename: Gyu Tae
authors.initials: GT
authors.lastname: Seo
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D005191:Family Characteristics; D005232:Fatty Acids, Volatile / Q000032:analysis / Q000378:metabolism; D005502:Food; D006859:Hydrogen / Q000378:metabolism*; D007773:Lactates / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D056910:Republic of Korea; D018505:Waste Management / Q000379:methods*; D062065:Wastewater
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D006859:Hydrogen; D007773:Lactates; D008697:Methane; D062065:Wastewater
keywords: Anaerobic co-digestion; Brown water; Food waste; Hydrogen; Methane; Organic loading; Two-stage system