Autotrophic nitrogen removal membrane bioreactor

Abstract

The invention provides an autotrophic nitrogen removal membrane bioreactor. The main body of the membrane bioreactor is of a cylinder structure, is divided into a partial nitrosification region, a transition region, an anaerobic ammonium oxidation region, a filter material filtering region, a membrane treatment region according to functions, and comprises an inner cylinder, an outer cylinder, a water inlet pipe, a water distribution disc, an aeration disc, a disc sieve plate, an annulus sieve plate, a filler bearing pore plate, a filter material bearing annulus plate, a membrane component, anaeration residual gas outward discharge pipe, a gas outward discharge pipe, a self-backflow pipe, an aerobic dredge pipe, a transition region dredge pipe and an anaerobic dredge pipe. The membrane bioreactor has good denitrification efficacy, effluent can be directly recycled, and the reactor is efficient and steady in performance and has the following advantages: (1) volume loading is high, treatment efficiency is high, and effluent can be directly recycled after disinfection; (2) adverse effect to anaerobic ammonium oxidation microorganisms in the aeration process is avoided; (3) autonomousblending of a biological functional zone is realized; (4) investment and operation cost is saved; (5) operation and management are convenient, and automatic control is easy to realize.

Description

technical field [0001] The invention relates to a combination of microorganisms and membranes for nitrogen-containing waste water, which belongs to the field of biological treatment of sewage denitrification, and in particular to an autotrophic denitrification membrane bioreactor. Background technique [0002] Ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. A large amount of ammonia nitrogen wastewater discharges into water bodies not only causes lake eutrophication, ocean red tide, black and odorous water bodies, but also causes great harm to the environment. It can also be toxic to people and organisms. In industrial wastewater treatment and reuse projects, ammonia nitrogen can cause the reproduction of microorganisms in the equipment to form biofouling, block pipes and water equipment. How to effectively control nitrogen pollution in water bodies has always been a hot topic in the environm...

AI Technical Summary

Problems solved by technology

The partial nitrification-anammox bioreactor currently used has the following shortcomings: ① the aeration process will inhibit the activity of anammox microorganisms, thereby affecting the overall nitrogen removal capacity of the bioreactor; ② partial nitrification and anammox The coexistence of functional flora in the same physical space requires strict control of process operating parameters and poor reactor stability; ③ some nitrosation functional areas and anammox functional areas artificially set physical boundaries so that the potential of each functional flora cannot be maximized; ④ Additional reflux equipment is required to achieve alkalinity recycling balance, which increases processing costs and process energy consumption; ⑤ loss of functional flora, and functional microbial biomass cannot be further increased, etc.

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