Integral anaerobic dynamic membrane bioreactor and method of operation

Abstract

The invention provides an integral anaerobic dynamic membrane bioreactor and an operation method thereof. The integral anaerobic dynamic membrane bioreactor mainly comprises a main body, a dynamic membrane module and a stirring device, wherein the main body has a hermetical structure; the top of the main body is provided with an air outlet; the side of the main body is provided with a water outlet; the bottom of the main body is provided with a water inlet and a mud outlet; the dynamic membrane module is arranged inside the main body; the inside of the dynamic membrane module is provided with a water outlet pipe which is connected with the water outlet on the main body; the stirring device is arranged on the main body; a transmission shaft of the stirring device passes through the dynamic membrane module; a blade on the transmission shaft is positioned under the dynamic membrane module; and a liquid level sensor is arranged inside the main body. Water automatically flows out after being filtered by a dynamic membrane depending on the pressure difference between the liquid level of a mixture and the water outlet pipe of the reactor. The operation method for the reactor is to operate the reactor by adopting constant liquid level, wherein the water automatically flows out after being filtered by the dynamic membrane module depending on the pressure difference between the liquid level of the mixture in the main body and the water outlet pipe of the dynamic membrane module. The integral anaerobic dynamic membrane bioreactor solves the problem of membrane blocking and reduces the operating cost.

Description

technical field [0001] The invention relates to an integrated anaerobic dynamic membrane bioreactor, which belongs to the technical field of water treatment with anaerobic technology as the main body. Background technique [0002] Membrane bioreactors can be divided into integrated type and split type according to different configurations. Traditional anaerobic membrane bioreactors mostly adopt a split configuration. The membrane modules are placed outside the main body of the anaerobic reactor, and a pump is used to drive the mixed liquid to flow on the membrane surface to form a higher cross-flow velocity. While this method obtains a large membrane flux, the shearing action of the pump destroys the structure of the sludge flocs, weakens the metabolic activity of microorganisms, and reduces the sewage treatment efficiency. [0003] Due to the use of microfiltration and ultrafiltration membranes, traditional anaerobic membrane bioreactors have disadvantages such as high mem...

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Problems solved by technology

[0003] Due to the use of microfiltration and ultrafiltration membranes, traditional anaerobic membrane bioreactors have disadvantages such as high membrane cost, easy clogging, difficult cleaning, and high energy consumption of circulating pumps, which have become bottlenecks that limit the further promotion and application of membrane bioreactors.

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