Mechanical scrubbing membrane bioreaction system and method

Abstract

The present disclosure relates to the technical field of membrane bioreaction, in particular to a mechanical scrubbing membrane bioreaction system and method. The mechanical scrubbing membrane bioreaction system includes the water inlet buffer, the filter area connected to the water inlet buffer, and the scrubbing particles that flow from the water inlet buffer to the filter area with the flow of water; the filter area includes an aeration area, a sedimentation recovery area And the membrane module used to filter the water inside the filter area, the aeration area is connected with the water inlet buffer zone, so that the scrubbing particles flow from the water inlet buffer zone to the aeration area with the flow of water; the aeration area and the membrane module Connected, so that the scrubbing particles in the aeration area flow to the membrane module with the water flow and air bubbles, and the scrubbing particles flowing to the membrane module scrub the membrane module through collision to slow down the pollution of the membrane module; after scrubbing the membrane module, the scrubbing particles fall into the In the sedimentation recovery area, the scrubbing particles in the sedimentation recovery area flow to the water inlet buffer zone through the channel, and the scrubbing particles can be recycled, thereby saving costs.

Description

technical field [0001] The present disclosure relates to the technical field of membrane bioreaction, in particular to a mechanical scrubbing membrane bioreaction system and method. Background technique [0002] The treatment and reuse of industrial and domestic wastewater is an effective way to save water resources and improve the ecological environment. Among the new technologies of reclaimed water reuse, membrane bioreactor (MBR) has obvious technical advantages. However, the membrane module is polluted during operation, so that the water output of the membrane gradually decreases with the extension of time, which increases the difficulty of MBR operation and management, and affects the development and application of this technology. [0003] At present, there are many ways to control the pollution of membrane modules at home and abroad, such as: optimizing operating parameters, modifying membranes, adding flocculants in the reactor, aeration scrubbing, and adding activat...

AI Technical Summary

Problems solved by technology

Among them, the method of optimizing operating parameters, although the operation is relatively simple, has no obvious effect on delaying membrane module fouling

Although the chemical modification of the membrane material can temporarily improve the anti-fouling performance of the membrane, the modification often requires additional costs and may cause other adverse effects such as membrane damage

Although the addition of flocculants can slow down the fouling of the membrane, the addition of chemical agents to the reactor is likely to affect the properties of the sludge itself

Patent CN204529441U discloses a membrane bioreactor scrubbed by pulse aeration. The aeration and scrubbing method has poor washing effect on the filter cake layer containing high-viscosity bacterial extracellular polymer (EPS), and the energy consumption of aeration higher

Patent CN105129972A discloses a membrane bioreactor that optimizes the way of backwashing and dosing of membrane modules. By calculating the membrane fouling situation, the amount of backwashing dosing is adjusted, and the dosing is eliminated at the stage of MBR membrane fouling. However, frequent dosing and washing will Damage the service life of the MBR diaphragm and increase the extra cost

Dosing activated carbon is a better way to deal with membrane module pollution. Although it can slow down the membrane module pollution and prolong the membrane module filtration cycle, the price of activated carbon is high and the density is high. The processing of components requires continuous dosing of activated carbon, and the cost is relatively high

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