HC-MBBR process for enhanced nitrogen and phosphorus removal of sewage

Abstract

The invention relates to the technical field of sewage treatment, in particular to an HC-MBBR process for enhanced nitrogen and phosphorus removal of sewage, which is characterized in that a specially designed soft biological filler can suspend in a reaction tank through aeration stirring, liquid backflow or mechanical mixing and form a fluidized state; an intercepting net and a gas stripping backflow device are arranged at the water outlet end of the reaction tank, so that the filler is intercepted in the reaction tank for cyclic utilization, and treated water enters the next unit; the HC-MBBR tank body form can be a concrete structure form and a steel structure form; the HC-MBBR process can be divided into three tank types according to different pollutant removal requirements: anaerobic, anoxic and aerobic, wherein the three tank types can all remove COD; the anaerobic HC-MBBR mainly removes total phosphorus, the anoxic HC-MBBR tank removes total nitrogen, the aerobic HC-MBBR tank removes ammonia nitrogen; and multiple groups of tank bodies can be designed for parallel operation; according to the invention, COD, ammonia nitrogen, total nitrogen and total phosphorus can be respectively removed. According to the method, different effluent quality standards including strict nitrogen and phosphorus removal requirements are met, and meanwhile, a relatively high removal rate of pollutants is ensured.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an HC-MBBR process for enhanced denitrification and dephosphorization of sewage. Background technique [0002] The MBBR moving-bed-biofilm-reactor, referred to as MBBR, was invented in the late 1980s and was quickly applied in Europe. It absorbed the advantages of both the traditional activated sludge method and the biological contact oxidation method. It has become a new and efficient composite process treatment method. Its core part is to directly add the suspended filler with a specific gravity close to water into the aeration tank as the active carrier of microorganisms, and rely on the aeration of the aeration tank and the lifting effect of the water flow to be in a fluidized state. When the microorganisms are attached to the carrier, The floating carrier moves freely in the reactor with the turning and turning of the mixed liquid, so as to achieve the purpose of s...

AI Technical Summary

Problems solved by technology

[0003] The biological fillers commonly used in the traditional MBBR process include polyethylene, polypropylene and their modified materials, and their shapes are mostly flat structures. The specific surface area of ​​these fillers is not large enough, usually less than 700m 2 / m 3 , has poor affinity to water, so the film-hanging time is longer, which is not conducive to the growth and reproduction of microorganisms; and the too flat structure determines that the packing resistance is too large during operation, and it is easy to accumulate at the bottom of the pool, which cannot form a good fluidization state

[0004] Combined with the actual project operation, the current traditional MBBR process has the following problems: the volume load of the tank body is relatively low, the film-hanging ability of the filler is poor, the filler is easy to fluidize and accumulate, the filler is easy to lose, blockage, etc.

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