Anaerobic digestion of municipal solid waste
Anaerobic digestion of classified municipal solid waste is a proposed disposal method for the mushrooming quantities of solid waste. To determine the suitability of anaerobic digestion to Los Angeles area wastes, a two-year pilot-scale study was conducted. A survey of a Southern California community was made to determine typical municipal waste composition. Municipal solid waste with characteristics conforming to survey results was classified using the Cal Recovery Process to provide a feedstock for digestion. Four 50-gal (0.19-cubic m) digesters were operated at organic loading rates from 0.065 lb VS/cu feet-day-0.25 lb VS/cubic feet-day (1.04 kg/cubic m day). Feed concentration ranged from 2.6%-8% VS and hydraulic retention time ranged from 15-30 days. Feed solids were composed of 80% classified municipal solid waste and 20% primary sludge. Results of the experimental investigation showed that gas containing 55%-60% methane can be produced at a rate of 7.0-9.0 gas/lb-VS applied (0.44 cubic m-0.56 cubic m/kg.VS applied). The highest gas production rate was obtained at the lowest digester loading rates. Digester mixing ability appeared to be the controlling process variable. No chemicals for pH control or nutrients were required to maintain normal process operation. (Refs. 17).
- Research Organization:
- Univ. of California, Los Angeles
- OSTI ID:
- 6722205
- Journal Information:
- J. Environ. Eng. (N.Y.); (United States), Vol. 109:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
METHANE
PRODUCTION
MUNICIPAL WASTES
ANAEROBIC DIGESTION
BIOMASS CONVERSION PLANTS
CALIFORNIA
GAS YIELDS
PERFORMANCE TESTING
PILOT PLANTS
SOLID WASTES
SURVEYS
ALKANES
BIOCONVERSION
DIGESTION
FEDERAL REGION IX
FUNCTIONAL MODELS
HYDROCARBONS
MANAGEMENT
NORTH AMERICA
ORGANIC COMPOUNDS
PROCESSING
TESTING
USA
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YIELDS
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)