A/O/E (anaerobic/aerobic/endogenous respiration) composite treatment system for domestic sewage

Abstract

The invention discloses an A / O / E (anaerobic / aerobic / endogenous respiration) composite treatment system for domestic sewage. The system comprises a sewage separation pool, a biodegradation pool, a biological acidification pool and an oxidation pool, wherein the oxidation pond is communicated with a wetland two-stage treatment unit. The system is capable of thoroughly removing COD (chemical oxygen demand) matters in domestic sewage, and effectively removing organic nitrogen, ammonia nitrogen and phosphorus in domestic sewage by adopting a mode of anaerobic-aerobic combination and wetland two-stage treatment, thus reliably ensuring that the treated water body achieves GB / T18921-2002 'urban sewage recycling water quality standards' of the national regulations; meanwhile, the system has the advantages of being simple in configuration, low in cost, good in social benefits, and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an A / O / E domestic sewage composite treatment system. Background technique [0002] At present, water pollution has become one of the major factors endangering the national economy and people's livelihood. According to the inspection data of the State Environmental Protection Administration, the overall pollution status of the four major river basins of the Yellow River, Yangtze River, Huaihe River and Haihe River has become the norm, and 26% of the seven major water systems have water quality of five 7 of the 9 major lakes are Class 5 and Class 5, and Class 5 and Class 5 water is "wastewater" that cannot even be used for agricultural water, let alone used for drinking and contacting the human body ! [0003] Although the amount of urban domestic water is much lower than the amount of agricultural water and industrial water, the pollution it causes cannot be ignored....

AI Technical Summary

Problems solved by technology

This technology can achieve good results in the removal of COD in domestic sewage, and basically meets the national GB18918-2002 "Urban Sewage Treatment Plant Pollutant Discharge Standard", but it is different from the national GB / T18921-2002 "Urban Sewage Regeneration" Compared with the requirements of "Water Quality Standards", there is still a big gap, especially the effect of denitrification and phosphorus removal is poor, which has a great impact on the quality of treated water

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