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

A short-range nitrification and sewage treatment technology, applied in the direction of aerobic and anaerobic process treatment, sustainable biological treatment, etc., can solve the problems of many influencing factors, difficult short-range nitrification and denitrification, accumulation instability, etc., and achieve energy saving , Overcome the lack of stable and optimized operation, and overcome the effect of not being able to control online

Inactive Publication Date: 2006-09-27
姚宏
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment

[0038] Example: see the working process of the present invention figure 1 First, the domestic sewage to be treated enters the anoxic tank 1 from the water tank 10 by the inlet pump 12, while the return sludge is returned to the anoxic tank 1 from the secondary settling tank 14 through the return sludge pump 20, and in the anoxic tank by the agitator 13 Stir the activated sludge and mix it with the nitrification liquid returned from the end of the aerobic tank, using nitrate nitrogen (mainly nitrite nitrogen) as the electron acceptor and organic carbon source as the electron donor. Function to carry out denitrification reaction. Then the high ammonia nitrogen sewage enters the aerobic tank 2 to continue the degradation of organic matter and the nitrification reaction of ammonia nitrogen. The DO sensor 5, pH sensor 6 and ORP sensor 3 are used to monitor the DO concentration, pH value and the end of the anoxic zone in real time online The ORP value is input to the internal circulati...

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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...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCY02W10/10
Inventor 彭永臻马勇王淑莹
Owner 姚宏
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