Anaerobic digestion process

Details Anaerobic digestion process Anaerobic digestion process

1978-09-14

1980-07-22

Castel, Benoit

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 8, 210 12, 210 16, C02C 116

Patent

active

042138574

ABSTRACT:
The present invention relates to a process for digestion treatment of organic wastes that are difficult to digest, with a high efficiency and an improved recovery rate of methane.
The wastes, before subjected to anaerobic treatment, are heated at 55.degree.-75.degree. C. within an acid or alkaline solution for dissolving digestible ingredients and the insoluble ingredients are eliminated before being transferred to an anaerobic digestion step. By exercising a pre-treatment for dissolving and separating digestible ingredients, the size of the container will be minimized as a result of the shortened time required for digestion and the recovery rate of methane will be improved.

REFERENCES:
patent: 3622507 (1971-11-01), Pasveer
patent: 3649534 (1972-03-01), Schotte
patent: 3772191 (1973-11-01), Thorn
patent: 3981800 (1976-09-01), Ort
patent: 4134830 (1979-01-01), Skogman et al.
Ghosh S. et al., "Anaerobic Acidogenesis of Wastewater Sludge", Journal W.P.C.F., vol. 47, No. 1, Jan. 1975, pp. 30-45.

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