Anaerobic and aerobic flocculation precipitation sewage treatment process

Abstract

The invention provides an anaerobic aerobic flocculation sedimentation sewage treatment process, which comprises the following steps: the sewage first passes through the grille and the water collection well, then enters the swirl type grit chamber through a water pump, and then flows into the anaerobic membrane bed for anaerobic biological treatment. The sewage after anaerobic treatment flows into the biological aerated filter for aerobic biological treatment. After aerobic treatment, it enters the flocculation reaction and settles before being discharged. The present invention takes anaerobic membrane bed and biological aerated filter as the main body, supplemented by flocculation and sedimentation, has fast start-up, stable operation, short hydraulic retention time, high efficiency, simple process flow, and convenient operation and implementation; the equipment is compact in structure and occupies an area Small area, less investment than infrastructure construction, low operating cost, low noise, no peculiar smell, and no impact on the surrounding environment during operation. It can be applied to urban domestic sewage, restaurants, living quarters, military barracks, factories and hospitals. treatment, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an anaerobic aerobic flocculation sedimentation sewage treatment process. Background technique [0002] In the existing sewage treatment process technology, the anaerobic membrane bed is an efficient sewage anaerobic treatment process, which has the advantages of fast start-up, sludge is not easy to lose, and fillers of different materials can be selected, but there is also a long reaction time. , the disadvantage of large pool volume; the biological aerated filter is also an efficient sewage aerobic treatment process. The biggest advantage of the biological aerated filter is that it integrates the functions of biological oxidation and interception of suspended solids, saving the secondary sedimentation tank; In addition, this treatment process also has the characteristics of large volume load, large hydraulic load, small footprint, low infrastruc...

AI Technical Summary

Problems solved by technology

[0002] In the existing sewage treatment process technology, the anaerobic membrane bed is an efficient sewage anaerobic treatment process, which has the advantages of fast start-up, sludge is not easy to lose, and fillers of different materials can be selected, but there is also a long reaction time. , the disadvantage of large pool volume; the biological aerated filter is also an efficient sewage aerobic treatment process. The biggest advantage of the biological aerated filter is that it integrates the functions of biological oxidation and interception of suspended solids, saving the secondary sedimentation tank; In addition, this treatment process also has the characteristics of large volume load, large hydraulic load, small footprint, low infrastructure investment, high oxygen transfer rate, and good effluent quality, but it also has high requirements for the concentration of suspended solids in the influent SS , the water head loss is large, and regular backwashing is required; flocculation and sedimentation is a very mature sewage purification treatment technology, the operation is simple and easy to implement, different sedimentation methods can be selected, and the most effective flocculant can be selected according to the water quality

In the invention patent application with the patent application number 00110777.1, a "self-flowing sewage treatment process" is disclosed, including cyclone sand removal, anaerobic biological treatment, aerobic biological treatment, sedimentation effluent, etc., which is characterized in that sewage passes through anaerobic For the digestion tank, staggered multi-channel upper and lower partitions are set in the anaerobic digestion tank. At the same time, a degradable biofilm is set in the tank, and the tank is covered with an insulation layer; Sludge separation, all the deposited sludge in this tank is returned to the anaerobic digestion tank, and mixed with anaerobic sludge; the advantage of this process is mainly anaerobic degradation, supplemented by aerobic degradation, and integrated sludge and water treatment , to reduce equipment investment and operating costs; but it also has the following disadvantages: the process is not reasonable, the anaerobic digestion effect is not good, the load rate is low, the infrastructure investment is large, and the aerobic tank produces a large amount of sludge. unrealistic

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