Performance evaluation of a full-scale innovative swine waste-to-energy system.
Intensive monitoring was carried out to evaluate the performance of a full-scale innovative swine waste-to-energy system at a commercial swine farm with 8640 heads of swine. Detailed mass balances over each unit of the system showed that the system, which includes a 7600m(3) anaerobic digester, a 65-kW microturbine, and a 4200m(3) aeration basin, was able to remove up to 92% of the chemical oxygen demand (COD), 99% of the biological oxygen demand (BOD), 77% of the total nitrogen (TN), and 82% of the total phosphorous (TP) discharged into the system as fresh pig waste. The overall biogas yield based on the COD input was 64% of the maximum theoretical, a value that indicates that even greater environmental benefits could be obtained with process optimization. Overall, the characterization of the materials fluxes in the system provides a greater understanding of the fate of organics and nutrients in large scale animal waste management systems.
Department of Civil and Environmental Engineering, Duke University, Durham, NC 27708, United States.
Jiele
J
Xu
Duke Carbon Offsets Initiative, Office of the Executive Vice President, Duke University, Durham, NC 27708, United States.
Charles W
CW
Adair
Department of Civil and Environmental Engineering, Duke University, Durham, NC 27708, United States. Electronic address: marc.deshusses@duke.edu.
Marc A
MA
Deshusses
D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004867:Equipment Design; D000072480:Farms; D008372:Manure; D009584:Nitrogen / Q000378:metabolism; D009657:North Carolina; D010758:Phosphorus / Q000378:metabolism; D013552:Swine; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*
D056804:Biofuels; D008372:Manure; D010758:Phosphorus; D009584:Nitrogen
Anaerobic digester; Biogas; Methane; Nutrient management; Swine waste