title: Decentralized application of anaerobic digesters in small poultry farms: performance analysis of high rate self mixed anaerobic digester and conventional fixed dome anaerobic digester.
abstract: Biomethanation of poultry litter was studied in conventional fixed dome anaerobic digester (CFDAD) and high rate self mixed anaerobic digester (SMAD) for possible decentralized application in poultry farms generating litter in the range of 500 kg/day. The performance of CFDAD and SMAD was compared. The study revealed that optimized hydraulic residence time (HRT), volatile solids (VS) loading rate, VS reduction, methane yield was 24 days, 4.0 kg VS/m(3)/day, 64%, 0.15 m(3)/(kg VS fed) and 40 days, 2.15 kg/m(3)/day, 42%, 0.083 m(3)/(kg VS fed) for SMAD and CFDAD, respectively. Better results with SMAD could be attributed to specific design features and intermittent mixing of the digester contents due to self-mixing mechanism. Preliminary cost estimates revealed that installation of SMAD would be remunerative for the farmer in terms of biogas and bio-manure.
authors.affiliation: Bioengineering and Environmental Centre (BEEC), CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India. gangagnirao@yahoo.com
authors.forename: A Gangagni
authors.initials: AG
authors.lastname: Rao
authors.forename: Bharath
authors.initials: B
authors.lastname: Gandu
authors.forename: K
authors.initials: K
authors.lastname: Sandhya
authors.forename: K
authors.initials: K
authors.lastname: Kranti
authors.forename: Shruti
authors.initials: S
authors.lastname: Ahuja
authors.forename: Y V
authors.initials: YV
authors.lastname: Swamy
mesh_terms: D000693:Anaerobiosis; D000822:Animal Husbandry; D000818:Animals; D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis; D019149:Bioreactors / Q000382:microbiology*; D008697:Methane / Q000032:analysis; D011200:Poultry; D012037:Refuse Disposal / Q000295:instrumentation* / Q000379:methods*; D013997:Time Factors; D014835:Volatilization; D014866:Waste Products / Q000032:analysis
chemical_list: D056804:Biofuels; D014866:Waste Products; D008697:Methane
keywords: Biogas; Biomethanation; CFDAD; Poultry litter; SMAD