Back-flushing operation method of dynamic membrane bioreactor

A technology of bioreactor and operating method, which is applied in the field of sewage treatment, can solve the problems of long time required for dynamic membrane recovery, large aeration volume and aeration time, low efficiency of aeration and backwashing, etc., to reduce the degree of damage, The effect of shortening time and reducing membrane fouling
CN1843971AInactive Publication Date: 2006-10-11SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2006-10-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a backwash operating mode of dynamic flim bioreactor, which belongs to the technical sphere of sewage disposal. Setting Film assembly made from bolting silk on the middle of the reaction, installing aeration device on its bottom, filtering by dynamic flim, making aeration device below film assembly, both supply oxygen for upper miscible liquids and accelerate the flow of miscible liquids, by the flow of bubble and miscible liquids, enhancing scouring and disturbance to dynamic flim; during the operation of dynamic flim bioreactor, when backwash needed, closing water outlet, opening backwash aeration pipe, supplying gas of 1.6- 8.0m3 / (m2*h) by backwash gas pump. The invention, greatly improves backwash efficiency, reduces aeration intensity and aeration time and cuts operating cost dowm; compared with cleaning with water under high pressure, it can proceedis on line, don't effect the operation of reaction, reduces the damage degree to dynamic flim, and shoertens the recovery time of dynamic flim.
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Description

technical field

[0001] The invention relates to a backwash operation method of a dynamic membrane bioreactor, belonging to the technical field of sewage treatment. Background technique

[0002] Currently used dynamic membrane bioreactors are all equipped with a baffle in the reactor, and the baffle divides the reactor into two parts, and the two parts are connected up and down. A membrane module is installed at one end, water is fed into the other end, and aeration is aerated at the water inlet end; a membrane module is installed at the other end, and water is discharged by utilizing the head difference between the liquid level of the reactor and the water outlet of the membrane module. During the operation of the dynamic membrane bioreactor, with the growth and reproduction of microorganisms, the dynamic membrane will become thicker and thicker, which will lead to the increase of membrane filtration resistance and the continuous increase of effluent head. When the effluent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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