Performance evaluation of an anaerobic/aerobic landfill-based digester using yard waste for energy and compost production.
The objective of this study was to evaluate a new alternative for yard waste management by constructing, operating and monitoring a landfill-based two-stage batch digester (anaerobic/aerobic) with the recovery of energy and compost. The system was initially operated under anaerobic conditions for 366 days, after which the yard waste was aerated for an additional 191 days. Off gas generated from the aerobic stage was treated by biofilters. Net energy recovery was 84.3MWh, or 46kWh per million metric tons of wet waste (as received), and the biochemical methane potential of the treated waste decreased by 83% during the two-stage operation. The average removal efficiencies of volatile organic compounds and non-methane organic compounds in the biofilters were 96-99% and 68-99%, respectively.
Yolo County Planning & Public Works Department, Division of Integrated Waste Management, Woodland, CA 95776, USA. ryazdani@sbcglobal.net
Ramin
R
Yazdani
Morton A
MA
Barlaz
Don
D
Augenstein
Masoud
M
Kayhanian
George
G
Tchobanoglous
D000693:Anaerobiosis; D056804:Biofuels; D003362:Cost-Benefit Analysis; D004868:Equipment Failure; D008697:Methane; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D012987:Soil; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical / Q000737:chemistry
D056804:Biofuels; D012987:Soil; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical; D008697:Methane