04323367 is referenced by 73 patents and cites 6 patents.

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 Low Btu gas is withdrawn from the acid phase digester while high Btu gas is withdrawn from the methane phase digester and may be upgraded for use as SNG.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.

Title
Gas production by accelerated in situ bioleaching of landfills
Application Number
6/161922
Publication Number
4323367
Application Date
June 23, 1980
Publication Date
April 6, 1982
Inventor
Sambhunath Ghosh
Homewood
IL, US
Agent
Thomas W Speckman
Assignee
Institute of Gas Technology
IL, US
IPC
C12P 5/02
C02F 11/04
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