Anaerobic digester gas collection and storage systems

Details Anaerobic digester gas collection and storage systems Anaerobic digester gas collection and storage systems

1982-07-01

1984-03-20

Castel, Benoit

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Maintaining stream pressure or flow

210180, 210218, 210DIG9, 435316, 220 85A, 220 85B, 220426, C02F 1104, C12M 102

Patent

active

044379870

ABSTRACT:
In an anaerobic sludge digestion tank system having walls communicating with a floor forming a storage container for the sludge and a fixed outer cover overlaying the storage container having a center stack communicating with the storage container, a flexible gas membrane is provided extending between the wall and the center stack over and above the storage container and a pressurizing membrane extends over the top of the gas membrane between the gas membrane and the cover and between the wall and center stack. The two membranes are sealingly attached to the top of the wall at their bottom portion and the center stack at their upper portion and form an inner pressurizing chamber.
An air injection system is provided for injection of air under pressure between the gas membrane and the pressure membrane into the inner chamber thus forcing the inner chamber to expand via the downward movement of the gas membrane. The controllable expansion of the inner chamber maintains and regulates the pressure of the gas produced by the anaerobic process that collects between the top of the sludge mixture and the bottom of the gas membrane.

REFERENCES:
patent: 3122985 (1964-03-01), Osborne
patent: 3981803 (1976-09-01), Coulthard
patent: 4060175 (1977-11-01), Rysgaard, Sr.
patent: 4166835 (1979-09-01), Anderson
patent: 4256837 (1981-03-01), Fluri et al.
patent: 4375784 (1983-03-01), Kalnins

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