Control of sludge temperature in autothermal sludge digestion

Details Control of sludge temperature in autothermal sludge digestion Control of sludge temperature in autothermal sludge digestion

1980-03-26

1981-06-30

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

210614, 210630, 435290, C02F 1104

Patent

active

042761743

ABSTRACT:
A process for controlling the autothermal aerobic digestion of sludge wherein sludge is mixed with an oxygen-containing gas in a covered digestion zone to form an aerated mixed liquor. The oxygen-containing gas is introduced into the mixed liquor being aerated at an oxygen concentration of at least 20% by volume, in sufficient quantity and rate to dissolve at least 0.03 pounds of oxygen per pound of total volatile solid content in the sludge introduced into the covered aerobic digestion zone, and the volatile solids content of the aerated mixed liquor is maintained at a high level. Temperature of the aerated mixed liquor is sensed, and the rate of introducing oxygen-containing gas into the aerated mixed liquor is controlled in response to the temperature sensing by increasing the rate of introduction of the oxygen-containing gas when temperature of the aerated mixed liquor decreases and by decreasing the rate of introduction of oxygen-containing gas when the temperature of the aerated mixed liquor increases, to maintain temperature of the aerated mixed liquor within predetermined limits.

REFERENCES:
patent: 1902550 (1933-03-01), Forrest
patent: 3010801 (1961-11-01), Schulze
patent: 3384553 (1968-05-01), Cuslavsky et al.
patent: 3670887 (1972-06-01), McWhirter
patent: 3857757 (1974-12-01), Herrick et al.
patent: 3926794 (1975-12-01), Vahldieck
patent: 4026793 (1977-05-01), Rein
patent: 4130481 (1978-12-01), Chase et al.

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