Liquid purification or separation – Processes – Treatment by living organism
Patent
1992-01-17
1993-08-10
Drodge, Joseph W.
Liquid purification or separation
Processes
Treatment by living organism
71 9, 71 12, 71 13, 71 14, 210620, 436137, C02F 302
Patent
active
052345963
ABSTRACT:
A process for controlling the throughput rate of aeration air when composting organic waste and/or sewage sludge migrating through a closed reaction vessel from an inlet opening to an outlet opening while aeration air supplied to the reaction vessel flows countercurrently through it, wherein a measured value corresponding to the O.sub.2 content of the waste air evacuated from the reaction vessel is continuously produced and, starting from a minimum value, the throughput rate of the aeration air is increased up to a maximum value until the measured O.sub.2 content of the waste air has dropped to its minimum value, and is decreased again when the O.sub.2 content of the waste air increases, the minimum value of the throughput rate being the value at which the O.sub.2 content of the evacuated waste air just begins to drop as compared to the O.sub.2 content of the supplied aeration air, and wherein the throughput rate is controlled between the minimum value and the maximum value as a monotonical descending function of the measured O.sub.2 content.
REFERENCES:
patent: 439881 (1983-07-01), Kneer
patent: 3138448 (1964-06-01), Schulze
patent: 4062770 (1977-12-01), Kneer
patent: 4174371 (1979-11-01), Bell et al.
patent: 4184269 (1980-01-01), Kneer
patent: 4249929 (1981-02-01), Kneer
Drodge Joseph W.
Dubno Herbert
Licencia-Holding S.A.
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