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A submerged flat-plate membrane bioreactor with additional microchannel turbulent flow promoter

A bioreactor, biological reaction technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of reducing membrane area, increasing energy consumption, and increasing axial pressure drop. It can increase the turbulence intensity, strengthen the scouring effect, and reduce the concentration polarization effect.

Inactive Publication Date: 2019-03-12
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the existence of the turbulent flow promoter, the effective membrane area will be reduced, and the axial pressure drop will increase sharply, thus increasing the additional energy consumption. In order to overcome this shortcoming, a "microchannel" turbulent flow promoter is introduced here

Method used

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  • A submerged flat-plate membrane bioreactor with additional microchannel turbulent flow promoter
  • A submerged flat-plate membrane bioreactor with additional microchannel turbulent flow promoter
  • A submerged flat-plate membrane bioreactor with additional microchannel turbulent flow promoter

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Embodiment Construction

[0013] see figure 1 , a submerged flat-panel membrane bioreactor with additional microchannel turbulence promoters, including a bioreactor, a flat membrane module and a microchannel turbulence promoter arranged in the bioreactor, the microchannel turbulence promoters are placed crosswise on the flat membrane On the surface, the aerator is arranged under the flat membrane module and the microchannel turbulence promoter. The aerator adopts an aeration tube with a plurality of small holes. At the same time, it drives the sewage to rise and flow in the gap formed by the flat membrane module and the microchannel turbulence promoter. At this time, the air bubbles are in the throttling flow state, and the cross flow required for cleaning the membrane surface is generated by air agitation. The gas device is set directly below the membrane, and the mixed liquid flows upward with the air flow, generating cross-flow shear force on the membrane surface, which can reduce membrane fouling, ...

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Abstract

The invention discloses an immersed flat sheet membrane bioreactor with micro-channel turbulence-flow promoters. The micro-channel turbulence-flow promoters are arranged in the immersed flat sheet membrane bioreactor at certain intervals in a certain arrangement manner, so that the micro-channel turbulence-flow promoters can generate a sluggish flow since gas generated in an aerator and liquid carried in the micro-channel turbulence-flow promoters are combined to form a mixed fluid which is lifted in a channel between a membrane and the micro-channel turbulence-flow promoters. The micro-channel turbulence-flow promoters can increase the turbulent degree on the surface of the membrane and further generate a shear force on the surface of the membrane, thereby reducing the thickness of a boundary layer and slowly-reducing concentration polarization. When sewage passes through the micro-channel turbulence-flow promoters, sludge particles are blocked in the micro-channels due to adsorption and bridging and such effects so that pores in the membrane is not liable to be blocked. A plurality of micro-pores are distributed on the micro-channel turbulence-flow promoters so that when suspension particles are deposited on the surface of the membrane, a filter cake layer which is better in compression resistance and is higher in porosity is formed, so that the filter cake layer deposited on the surface of the membrane is promoted to fall, thereby reducing the accumulation speed of the filter cake layer, improving membrane flux and correspondingly slowly-reducing membrane pollution.

Description

technical field [0001] The invention relates to a submerged flat-plate membrane bioreactor with an additional microchannel turbulent flow promoter. Background technique [0002] Membrane bioreactor is a new and efficient sewage treatment technology. In view of its many advantages that cannot be compared with traditional treatment processes (such as: good effluent quality, high sludge concentration, high sustainable organic load, small footprint, Low sludge production, easy automatic control, convenient operation and management, etc.), has been highly praised and concerned by scholars and water treatment practitioners in recent years. Especially the submerged membrane bioreactor, which has more compact structure, lower operating pressure and lower energy consumption, is the focus of membrane bioreactor research and application. Compared with tubular membranes, roll membranes, curtain membranes and beam membranes, flat membranes have gained a lot of attention in the field of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/28
Inventor 解芳刘进荣陈伟伟王建敏
Owner INNER MONGOLIA UNIV OF TECH
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