Method for manufacturing immersed square staggered arrangement tubular membrane bioreactor

Abstract

The invention discloses a method for manufacturing an immersed square staggered arrangement tubular membrane bioreactor (MBR). Tubular membranes are arranged in square staggered rows in the horizontal direction, and the two ends of each membrane are connected with effluent and backflushing operation respectively. A membrane assembly is immersed into a biological reaction pond, and an aerating device is mounted at the bottom of an MBR device to compress air for aeration. The flowing direction of air-liquid mixed fluid is perpendicular to the surface of a cylindrical membrane, and a remarkable inhibiting effect is achieved on a membrane face contaminated layer. Membrane face pollutants are removed through the reverse washing process to keep high membrane flux.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a submerged square staggered tubular membrane bioreactor. Background technique [0002] Membrane bioreactor (MBR) is a water treatment technology that organically combines biological treatment process and membrane separation process. It has significant advantages over traditional biological treatment technology and has played an important role in the field of sewage treatment. One of the key technologies in the development of MBR is how to weaken membrane fouling. The earliest developed curtain hollow fiber MBR technology is a treatment process based on the dynamic balance among factors such as sludge concentration, pollutant characteristics, aeration rate, membrane characteristics and water production. Curtain-type hollow fiber MBR has operational problems such as broken filaments, fiber entanglement and cleaning difficulties, and people have developed a flat-plate MBR. The fla...

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Problems solved by technology

However, the manufacturing cost of the flat MBR membrane module is also greatly increased, and the bubble rise process is too regular, which fails to significantly weaken the development of the fouling layer on the membrane surface.

[0003] The characteristics of these membrane modules determine that the control measures are limited, the membrane modules cannot be backwashed, and other technologies that can effectively control membrane surface pollution can only maintain the dynamic balance of the low-flux operating system in a low-flux operation mode.

[0004] The preparation of tubular MBR components has also been reported, but this technology is similar to the preparation principle of flat MBR components. The tube membranes are arranged vertically, and the gas-liquid fluid floats from bottom to top along the surface of the tube membranes, but backwashing cannot be performed.

Membrane surface fouling is also controlled based on the vertical flow rate of the aeration bubbles, the vacuum degree of the product water, and external factors, and the dynamic balance of the low-flux operation system has not been significantly improved.

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