Control system for short-cut nitrification and denitrification of A/O process for treating sewage and on-line control method therefor

Abstract

The invention discloses an effluent treatment control system and on-line control method of A / O craft short distance nitrated and antinitrated, which is characterized by the following: the domestic sewage is used as dealing object at normal temperature; the DO sensor and pH sensor are installed in aerobic pool; the ORP sensor is set up in anoxic tank; the internal recycle sensor controls inner loop reflux quantity of system dynamically; the aeration quantity controls the aeration quantity of kinetic control system; the aeration quantity and inner loop reflux quantity are changed limberly according to water quality of inflow and water outlet; the level or nitration and anti-nitration are held accurately. The invention simplifies the craft, which reduces the cost.

Description

(1) Technical field [0001] The invention belongs to a sewage biological treatment control system and an online control method thereof. (2) Background technology [0002] Sewage biological denitrification technology is an important research direction in the field of water pollution control, and has attracted widespread attention from all over the world. Using the conventional two-stage activated sludge treatment process, the total nitrogen removal rate is only between 10% and 30%. Therefore, for urban sewage and nitrogen-containing industrial wastewater, the conventional activated sludge method is used for treatment. The effluent will also contain a large amount of nitrogen and phosphorus. With the increasingly prominent phenomenon of “eutrophication” of surface water bodies, people are more The sludge process was modified to increase the removal rate of nitrogen and phosphorus. The most representative ones are the A / O method, A 2 / O method and other processes. Among them, the A / O...

AI Technical Summary

Problems solved by technology

However, there are few studies on short-cut nitrification and denitrification in continuous flow operation systems. Due to many influencing factors, it is generally difficult to achieve short-cut nitrification and denitrification.

Therefore, the research on the short-cut nitrification and denitrification of the A / O pilot system for the treatment of actual domestic sewage has not been reported at home and abroad.

In addition NO 2 - The accumulation of NO is very unstable, and nitric acid bacteria can quickly convert NO 2 - converted to NO 3 - , therefore, the short-cut nitrification denitrification process that has been realized is restored to the full-range nitrification process

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