Process for the treatment of sludge

Details Process for the treatment of sludge Process for the treatment of sludge

1978-12-08

1980-05-20

Wyse, Thomas G.

Liquid purification or separation

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

Responsive to fluid flow

210 63Z, 210 73S, C02C 300

Patent

active

042038383

ABSTRACT:
Process for treating sewage sludge at relatively low temperatures below 165.degree. C. under pressure. The sludge is heat treated in a reactor in which it is brought into close, uniform contact with air with the discharge of air bubbles from the reactor effectively prevented. The liquor separated from the treated sludge is treated by two steps of the activated sludge process. The malodorous gas produced during the treatment of sludge is also deodorized or incinerated. A fully closed treatment process is provided which does not cause any secondary pollution problem.

REFERENCES:
patent: 1271899 (1918-07-01), Howard
patent: 3256179 (1966-06-01), Teletzke et al.
patent: 3660277 (1972-05-01), McWhirter et al.
patent: 3661778 (1972-05-01), Pradt
patent: 3697417 (1972-10-01), Teletzke et al.
patent: 3824186 (1974-07-01), Erickson et al.
patent: 3849536 (1974-11-01), Morgan
patent: 3920506 (1975-11-01), Morgan

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