Gas production by accelerated in situ bioleaching of landfills
A process for improved gas production and accelerated stabilization of landfills by accelerated in situ bioleaching of organic wastes by acid forming bacteria in substantially sealed landfills, passing the leachate of hydrolysis and liquefaction products of microbial action of the microorganisms with the organic material to an acid phase digester to regenerate the activated culture of acid forming microorganisms for recirculation to the landfill, passing the supernatant from the acid phase digester to a methane phase digester operated under conditions to produce methane rich gas. The supernatant from the methane phase digester containing nutrients for the acid forming microorganisms and added sewage sludge or other desired nutrient materials are circulated through the landfill. Low Btu gas is withdrawn from the acid phase digester while high Btu gas is withdrawn from the methane phase digester and may be upgraded for use as SNG. The process of this invention is applicable to small as well as large organic waste landfills, provides simultaneous disposal of municipal solid waste and sewage sludge or other aqueous organic waste in a landfill which may be stabilized much more quickly than an uncontrolled landfill as presently utilized.
- Assignee:
- Institute Of Gas Technology
- Patent Number(s):
- US 4323367
- OSTI ID:
- 5151659
- Resource Relation:
- Patent File Date: Filed date 23 Jun 1980; Other Information: PAT-APPL-161922
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved energy recovery from municipal solid wastes in sanitary landfills by two-phase digestion of biomass
Design of top covers supporting aerobic in situ stabilization of old landfills - An experimental simulation in lysimeters
Related Subjects
42 ENGINEERING
09 BIOMASS FUELS
METHANE
BIOSYNTHESIS
ORGANIC WASTES
ANAEROBIC DIGESTION
IN-SITU PROCESSING
SANITARY LANDFILLS
LEACHING
GASES
WASTE PROCESSING
ALKANES
BIOCONVERSION
DIGESTION
DISSOLUTION
FLUIDS
HYDROCARBONS
MANAGEMENT
ORGANIC COMPOUNDS
PROCESSING
SEPARATION PROCESSES
SYNTHESIS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
420900 - Engineering- Waste Processing Plants & Equipment- (-1989)
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)