Micro multi-stage AO process sludge self-circulation water treatment process

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a micro multi-stage AO process sludge self-circulation water treatment process, aiming at the problem of poor sewage treatment effect, the invention provides the following scheme: the process comprises the following steps: S1, sewage enters an oil separation tank to remove floatable oil; s2, phosphorus-accumulating bacteria in an anaerobic tank release PO4 < 3->; s3, phosphorus-accumulating bacteria in a first-stage aerobic zone absorb soluble phosphorus, and nitrifying bacteria convert ammonia nitrogen into nitrate; s4, nitrate is converted into nitrogen by denitrifying bacteria in a primary anoxic zone; s5, the operation in S3 continues in a second-stage aerobic zone; s6, the operation in the step S4 continues in a second-stage anoxic zone; s7, the operation in the step S3 continues in a third-stage aerobic zone; s8, mud-water separation is carried out in a mud-water separation tank; s9, advanced treatment is carried out in a filter tank; and S10, disinfecting is carried out in a disinfecting tank. Through three-stage AO circulation, the nitrogen and phosphorus removal effect is better, the problem that biological flora is fragile or damaged due to environmental change is solved, an organic carbon source can be fully utilized, and the cost of adding the carbon source is saved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a micro multi-stage AO process sludge self-circulating water treatment process. Background technique [0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or for reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment; production sewage includes industrial sewage, agricultural sewage and medical sewage, etc., while domestic sewage is sewage generated in daily life, which refers to various forms of inorganic substance...

AI Technical Summary

Problems solved by technology

[0004] The existing sewage treatment process has a poor treatment effect on sewage with a small amount of water and a COD concentration as high as 400-600mg / L. Due to the small amount of sewage treatment, the stability of the water treatment system is weak; and the existing sewage treatment process is used in northern China When the temperature is low in the north, the operation stability is poor in winter, and because the residents in the north like beef and mutton, the oil content in the sewage is high, and it is difficult to remove; and the sewage treatment is highly specialized, and the operation and maintenance are difficult

Images