Flow-control apparatus and process for an oxidation ditch

Details Flow-control apparatus and process for an oxidation ditch Flow-control apparatus and process for an oxidation ditch

C - Chemistry, Metallurgy

02

F

362/4

C02F 3/30 (2006.01) C02F 3/12 (2006.01) C02F 3/20 (2006.01)

Patent

CA 1105624

MPL-77-2 FLOW-CONTROL APPARATIJS AND PROCESS FOR AN OXIDATION DITCH ABSTRACT OF THE DISCLOSURE This flow-control apparatus for an oxidation ditch comprises a barrier which divides a channel of an oxidation ditch into an intake channel and a discharge channel, at least one submerged turbine which pumps mixed liquor from the intake channel, and at least one discharge duct which connects each turbine to the discharge channel and passes beneath the barrier. Compressed air is supplied to each turbine and/or to each discharge duct. Activated sludge is fed to the anoxic portion of the ditch and/or to each turbine which provides complete mix and propels the mixed liquor in plug-type flow through the channels of the oxidation ditch. By selectively and independently controlling turbine speed amount and/or feed location of compressed air, the timed aerobic/anoxic ratio for the ditch can be controlled in accordance with independent parameters, such as seasonal temperatures. - 1 -

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