Anaerobic digestion of municipal solid waste and agricultural waste and the effect of co-digestion with dairy cow manure.
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 62m3 methane/ton of CM on dry weight basis. The single waste digestion of OFMSW produced 37m3 methane/ton of dry waste. Co-digestion of OFMSW and CM resulted in 172m3 methane/ton of dry waste. Co-digestion of CGW and CM produced 87m3 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.
Macias-Corral
Maritza
M
Department of Civil Engineering, New Mexico State University, MSC 3CE, P.O. Box 30001, Las Cruces, NM 88003, USA.
Samani
Zohrab
Z
Hanson
Adrian
A
Smith
Geoffrey
G
Funk
Paul
P
Yu
Hui
H
Longworth
John
J
D000693:Anaerobiosis; D000818:Animals; D019149:Bioreactors; D002417:Cattle; D003612:Dairying; D005227:Fatty Acids / Q000032:analysis; D005740:Gases / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008372:Manure; D010100:Oxygen / Q000032:analysis; D012037:Refuse Disposal; D014835:Volatilization; D014866:Waste Products
D005227:Fatty Acids; D005740:Gases; D008372:Manure; D014866:Waste Products; D010100:Oxygen