Anaerobic digestion of municipal solid waste and agricultural waste and the effect of co-digestion with dairy cow manure |
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Authors: | Macias-Corral Maritza Samani Zohrab Hanson Adrian Smith Geoffrey Funk Paul Yu Hui Longworth John |
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Institution: | Department of Civil Engineering, New Mexico State University, MSC 3CE, P.O. Box 30001, Las Cruces, NM 88003, USA. |
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Abstract: | Anaerobic digestion of dairy cow manure (CM), the organic fraction of municipal solid waste (OFMSW), and cotton gin waste (CGW) was investigated with a two-phase pilot-scale anaerobic digestion (AD) system. The OFMSW and CM were digested as single wastes and as combined wastes. The single waste digestion of CM resulted in 62m(3) methane/ton of CM on dry weight basis. The single waste digestion of OFMSW produced 37m(3) methane/ton of dry waste. Co-digestion of OFMSW and CM resulted in 172m(3) methane/ton of dry waste. Co-digestion of CGW and CM produced 87m(3) methane/ton of dry waste. Comparing the single waste digestions with co-digestion of combined wastes, it was shown that co-digestion resulted in higher methane gas yields. In addition, co-digestion of OFMSW and CM promotes synergistic effects resulting in higher mass conversion and lower weight and volume of digested residual. |
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