Double-circulation biological fluctuating bed system and method for traffic water pollution prevention and control

Abstract

The invention discloses a double-circulation biological fluctuating bed system and a method for traffic water pollution control, the double-circulation biological fluctuating bed system comprises an integrated pretreatment bed, a facultative biological fluctuating bed, a moderate-oxygen biological fluctuating bed, an aerobic biological fluctuating bed and an inclined tube precipitation bed, and supernate in the inclined tube precipitation bed can be separated by turning on a reflux controller according to the change requirements of process conditions. The reflux liquid flows back to any one or a combination of more of the facultative biological fluctuating bed, the moderate-oxygen biological fluctuating bed and the aerobic biological fluctuating bed through an outer reflux pipe to form reflux liquid outer circulation; meanwhile, microcirculation migration in microorganisms is realized among different multi-medium fillers in the facultative biological fluctuating bed, the moderate-oxygen biological fluctuating bed and the aerobic biological fluctuating bed and in the multi-medium fillers. According to the double-circulation biological fluctuating bed system and method for traffic water pollution prevention and control, the impact resistance is high, the water treatment effect is good, the environmental toughness is high, the operation cost is low, and maintenance operation is simple.

Description

technical field [0001] The invention relates to the technical field of sewage treatment in the traffic industry, in particular to a double-cycle biological fluctuating bed system and method for traffic water pollution prevention and control. Background technique [0002] The places where people flow in the transportation industry mainly include road service areas, railway stations, ports, wharves, airports, ships, etc. Sewage will inevitably be generated during the operation of these stations. The sewage of these stations is mainly domestic sewage, but it has its own particularities due to different industries, such as high concentrations of ammonia nitrogen and petroleum pollutants, and large daily and annual variation coefficients of water volume. [0003] The special requirements of the transportation industry for sewage treatment facilities are: low equipment operating costs, simple management and maintenance operations, impact load resistance of the system, high stabili...

AI Technical Summary

Problems solved by technology

Sewage treatment at transportation stations is mainly based on the decentralized small-scale domestic sewage treatment technology in cities and towns, using methods such as activated sludge, contact oxidation, biological aerated filters, membrane bioreactors, and constructed wetlands. There are certain technical limitations. For example, the activated sludge method generally requires sludge reflux and mixed liquid reflux, and the remaining sludge needs to be discharged regularly. The process operation is complicated and the system has poor impact resistance; The effect is limited, and it is difficult to adapt to the increasingly stringent water quality discharge requirements; the biological aerated filter generally needs backwashing and other anti-clogging operations, and the system is prone to failure; the membrane bioreactor needs to clean the membrane modules regularly, and has high requirements for system control. The operating cost is also high; constructed wetlands cannot directly treat high-ammonia-nitrogen sewage to meet the standards, and have high requirements for climatic conditions

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