Sewage treatment equipment and treatment method combining multi-stage anoxic oxic (AO) membrane technology and membrane bioreactor (MBR) membrane technology

Abstract

The invention belongs to the technical field of sewage and wastewater treatment, and particularly relates to a sewage treatment equipment and treatment method combining multi-stage anoxic oxic (AO) membrane technology and membrane bioreactor (MBR) membrane technology. The sewage treatment equipment comprises a raw water pretreatment device, an AO process treatment device and an MBR membrane mechanism; the AO process treatment device comprises an anaerobic mechanism and an aerobic mechanism, wherein the anaerobic mechanism comprises a plurality of anaerobic tanks, the aerobic mechanism comprises a plurality of aerobic tanks, and all the anaerobic tanks and the aerobic tanks are all internally provided with an aeration system; the raw water pretreatment device comprises a plurality of filterturnover mechanisms and a plurality of filter tanks; and the MBR membrane mechanism comprises a membrane separation tank, an MBR membrane reactor and a back cleaning assembly. Regulation of differentprocesses can be realized through the control of gate valves, and certain flexibility is achieved, and the plurality of aerobic tanks and anaerobic tanks can be operated in series or in parallel through the gate valves. The sewage passes through the series-connected multi-stage A / O process treatment devices and then enters an MBR membrane area, so that high-efficiency nitrogen removal is realized, and treatment efficiency of the equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage and waste water treatment. Specifically, the invention relates to a sewage treatment equipment and treatment method combined with multi-stage AO and MBR membrane technology. Background technique [0002] If the sewage or wastewater produced by human production and life is directly discharged into the natural environment without treatment, it will not only pollute the living environment of human beings, but also pose a threat to human health. Therefore, it is necessary to treat the generated sewage or waste water, and the treated water resources can be discharged to natural water bodies or reused as reclaimed water to reduce pollution to the natural environment. Reuse of reclaimed water not only saves human water resources but also saves Cost of production. As the country's requirements for water environment quality are getting higher and higher, and the sewage discharge indicators are constantly i...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing activated sludge method, traditional contact oxidation method, traditional MBR and other processes have their own advantages and disadvantages. For example, the investment cost of the activated sludge method is low, but the sludge generation is large and the process occupies a large area; the traditional The amount of sludge produced in the contact oxidation process is small, but the investment cost is large and the floor area is large; the traditional MBR process covers a small area, but it still needs to discharge excess sludge regularly and cannot reduce the generation of excess sludge; the above processes are not very good Solve the problem of denitrification

Most village and town sewage treatment equipment adopts the traditional A2O process for denitrification and phosphorus removal. However, due to the contradiction between denitrification and phosphorus removal in the traditional A2O process, it is difficult to obtain efficient nitrogen and phosphorus removal effects in the same reaction tank. The removal rate of nitrogen and phosphorus is low

Images