AI Article Synopsis
- The study compared the biomethanation performance of two anaerobic digesters: conventional fixed dome (CFDAD) and high rate self mixed (SMAD) in processing poultry litter from farms generating around 500 kg/day.
- The optimized parameters for SMAD showed better efficiency with a hydraulic residence time of 40 days, resulting in a higher methane yield and volatile solids reduction compared to CFDAD's 24-day HRT.
- SMAD's design features and self-mixing mechanism contributed to its superior performance, making it financially advantageous for poultry farmers through biogas production and bio-manure generation.
Article 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.
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| http://dx.doi.org/10.1016/j.biortech.2013.06.076 | DOI Listing |
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