Process for converting biodegradable wastes into industrial gase

Details Process for converting biodegradable wastes into industrial gase Process for converting biodegradable wastes into industrial gase

1979-01-10

1980-05-27

Bashore, S. Leon

Gas: heating and illuminating

Processes

Fuel mixtures

48111, 48209, 71 10, 210 16, 435167, C02C 114

Patent

active

042048427

ABSTRACT:
Biodegradable organic wastes are crushed and then fed to a first cell A of a treatment unit in which they are mixed with liquid recirculated from the discharge end of that unit to form a sludge. After oxygenation in cell A, and following the establishment of an anaerobic atmosphere in that cell by the introduction of carbon dioxide, part of the sludge passes by gravity into a lower-level second cell B for prefermentation with evolution of carbon dioxide. Subsequently, part of the contents of cell B is transferred -- again by gravity -- to a third cell C, at a still lower level, where fermentation with generation of methane takes place. The methane production is continued thereafter in a fourth cell D at the lowest level, the latter containing a potash solution in which the accompanying carbon dioxide is dissolved while the methane is recovered. The recirculation of liquid from cell D to cell A not only supplies methane-producing bacteria to the incoming sludge but also maintains the latter at a pH of 7 or higher.

REFERENCES:
patent: 3314765 (1967-04-01), Abson et al.
patent: 3711392 (1973-01-01), Metzger
patent: 3756784 (1973-09-01), Pittwood
patent: 3973923 (1976-08-01), Staege et al.
patent: 4040953 (1977-08-01), Ort

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