Lateral flow type membrane bioreactor device and sewage treatment method using same

Abstract

The invention provides a lateral flow type membrane bioreactor device and a sewage treatment method using same. The device sequentially comprises a regulating pond (10-2), at least a first bioreactor (20-0) and an ultrafiltration system (40-0), wherein the first bioreactor (20-0) comprises a first aerobic pond (20-2), a first anoxic pond (20-4) and a first anaerobic pond (20-6); the ultrafiltration system (40-0) also comprises a membrane ultrafiltration device (40-0-0) and an ultrafiltration back flush water pot (40-10-4); a gas back flush pipe (40-8-30) is arranged at the centre of a membrane cylinder (40-8-64); a filtered water collection bin (40-8-48) is arranged below the membrane cylinder (40-8-64); an impermeable clapboard is arranged between the membrane cylinder (40-8-64) and the filtered water collection bin (40-8-48); and a plurality of U-shaped hollow fibrous membranes (40-8-10) are closely arranged between the inner wall of the hollow membrane cylinder (40-8-64) and the outer wall of the gas back flush pipe (40-8-30), sealed in the membrane cylinder (40-8-64) with downward openings, and form a sewage storage bin (40-8-40) with the hollow membrane cylinder. The invention also provides a combined sewage treatment method by utilizing at least the lateral flow type membrane bioreactor device and a lateral flow type membrane ultrafiltration device comprising a gas back flush, gas-water joint back flush and chemical membrane cleaning system.

Description

technical field [0001] The invention relates to a sewage treatment device and method, more specifically, to a device using a side-flow membrane bioreactor (MBR) and a method for treating sewage with the device. Background technique [0002] China is a water-scarce country, and sewage treatment and its reuse are effective measures for the development and utilization of water resources. The reuse of "reclaimed water" is to use urban sewage for non-drinking purposes such as greening, flushing, replenishment of ornamental water bodies, and supplementary water for industrial circulating water after being treated by equipment such as membrane bioreactors; Clean water can be used for purposes with high water quality requirements such as drinking. Urban sewage is available nearby, eliminating the need for long-distance water transportation, and the pollutants are greatly removed after being treated, which not only saves water resources, but also reduces environmental pollution. "R...

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Problems solved by technology

[0023] However, the above-mentioned sewage advanced treatment device using the combined process of upflow multi-layer biofilm filtration and planktonic growth is fixedly configured, and cannot be flexibly matched according to water quality needs and site requirements, so there are certain defects

[0024] On the whole, the existing MBRs are basically submerged MBRs. Although the energy consumption has been reduced compared with most traditional activated sludge methods, the energy consumption is still high; Its membrane system only plays the role of reverse water separation, but cannot play a role in regulating activated sludge; membrane pollution is always a problem that is difficult to solve. Although cross-flow technology can reduce membrane pollution to a certain extent, However, the required technical equipment is complex and energy-consuming; the membrane maintenance process is complex, requiring high technical level of equipment and personnel, and generally requires downtime maintenance; excess sludge discharge is large; and the cost and operating cost are also high

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