Cyclic, multi-stage biological process for wastewater treatment

Details Cyclic, multi-stage biological process for wastewater treatment Cyclic, multi-stage biological process for wastewater treatment

1990-04-16

1990-12-04

Wyse, Tom

Liquid purification or separation

Processes

Treatment by living organism

210614, 210620, 210142, 210201, C02F 330

Patent

active

049751964

ABSTRACT:
A method for anaerobic biological waste treatment in multiple stages wherein a relatively high strength wastewater is introduced into a first biological reactor to produce an effluent of reduced strength, the effluent is passed into a second biological reactor for reaction therein, passage of the effluent into the second biological reactor is continued until the biological solids in the second reactor enter into a negative growth phase and become relatively stable, whereupon the flow of waste through the reactors is reversed by terminating introduction of the waste into the first reactor and passing the same into the second reactor to cause microorganisms in the second reactor to enter into a positive growth phase and the solids in the first reactor to enter into a negative growth phase.

REFERENCES:
patent: 3442386 (1969-05-01), Malm et al.
patent: 3497066 (1970-02-01), Nicol
patent: 3524547 (1970-08-01), Nicol
patent: 3977965 (1976-08-01), Tholander et al.
patent: 4179366 (1979-12-01), Kaelin
patent: 4624788 (1986-11-01), Repin

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