High-efficiency nitrogen and phosphorus removal control method and system for short-cut nitrification and denitrification reaction tank

Abstract

The invention relates to an efficient nitrogen and phosphorus removal control method and system for a short-cut nitrification and denitrification reaction tank. The method is suitable for municipal sewage treatment. The technical scheme adopted by the invention is as follows: the efficient nitrogen and phosphorus removal control method for the short-cut nitrification and denitrification reaction tank is characterized by comprising the following steps: S1, acquiring the suspended solid concentration of a mixed solution at a water inlet end of a reaction tank system, the volume index and flow of sludge, the dissolved oxygen concentration of an aerobic tank in the reaction tank system and the sludge load of an anaerobic tank in the reaction tank system; the SS concentration of a secondary sedimentation tank in the reaction tank system; s2, controlling a blast aeration system of an aerobic tank, a sludge pump of a secondary sedimentation tank, a return sludge pump between the aerobic tank and an anaerobic tank, a carbon source adding device at the front end of the anaerobic tank and flow distribution proportion regulating valves at the water inlet ends of the aerobic tank and the anaerobic tank based on the suspended solid concentration of the mixed liquid, the sludge volume index, the flow, the dissolved oxygen concentration, the sludge load and the SS concentration; chemical adding equipment of the sludge reflux pump, chemical adding equipment of the secondary sedimentation tank and a sewage lifting pump.

Description

technical field [0001] The invention relates to a control method and system for efficient nitrogen and phosphorus removal in a short-range nitrification and denitrification reaction pool. Applicable to the field of municipal sewage treatment. Background technique [0002] The discharge of domestic and industrial sewage has an important impact on the quality of the water environment. Among them, the excessive discharge of nutrients such as nitrogen and phosphorus in sewage is one of the main reasons for water eutrophication. The eutrophication of the water body has caused the rapid and massive reproduction of planktonic algae, and it is easy to form a large-scale outbreak of algae disasters. my country has continuously strengthened the construction of urban sewage treatment plants. Relevant pollutant emission standards are also becoming more and more stringent for nitrogen and phosphorus emissions. Newly built sewage treatment plants need to consider the emission control ...

AI Technical Summary

Problems solved by technology

[0017] At present, there is no effective supervision and control for the efficient operation of the A / O pool, and there is no effective control system for diagnosing and analyzing abnormal conditions in the A / O pool, as well as judging possible problems and taking corresponding measures

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