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Biological denitrification technique for waste water of bean products and fuzzy control device and method

A bean product wastewater and fuzzy control technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problems of excessive aeration or stirring time, incomplete nitrification or denitrification, insufficient aeration or stirring time, etc., to achieve The effect of reducing sludge generation, reducing alkali dosage, and saving oxygen supply

Inactive Publication Date: 2006-07-26
BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
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Problems solved by technology

[0005] The purpose of the present invention is to provide a biological denitrification process of bean product wastewater and a fuzzy control device and method to solve the problems caused by incomplete nitrification or denitrification caused by insufficient aeration or agitation time and excessive aeration or agitation time. Problems of increased operating costs and wasted energy

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  • Biological denitrification technique for waste water of bean products and fuzzy control device and method
  • Biological denitrification technique for waste water of bean products and fuzzy control device and method
  • Biological denitrification technique for waste water of bean products and fuzzy control device and method

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Embodiment

[0054] Example: the dilution of the actual soybean product wastewater (pH=4-5, COD=10000-15000mg / L, TN=500-600mg / L) discharged by a food processing enterprise is used as raw water. The selected SBR reaction tank has an effective volume of 38L, and the COD concentration of the mixed solution in the reaction tank is maintained at 400-800mg / L. 4 + -N concentration is 65~75mg / L, and the initial MLSS in the reaction tank is 3-5~4-0g-L -1 , the aeration rate is constant at 0-6m 3 / h, the mud age is maintained at about 50d, and the reaction temperature is 25°C. After implementing fuzzy control, the cumulative rate of nitrite (NO 2 - -N / NO X - -N) is always maintained above 96%, which is a typical short-range nitrification type; the removal rate of COD, ammonia nitrogen and total nitrogen in the final effluent of the reaction tank is always maintained above 90%, 99% and 92%.

[0055] Fuzzy control of aeration time:

[0056] Taking DO as the fuzzy control parameter of the aerat...

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Abstract

In the invention, dissolved oxygen DO, redox potential ORP and pH value is used as fuzzy parameters to keep realized short range nitrofy denitrify processing, not only the phenomenon that short range nitrofy transfers to total range nitrofy produced by long time aeration is avoided, but also has advantages of complete nitrofy and denitrofy. The other characteristic is to combine short range nitrofy denitrofy processing and SBR together.

Description

technical field [0001] The invention relates to a wastewater treatment process, a control device and a method, in particular to an intermittent activated sludge wastewater biological denitrification process, a control device and a method. Background technique [0002] Biological denitrification technology of sewage is an important research direction in the field of water pollution control, and has attracted widespread attention from all over the world. Due to the incomplete nitrification in the conventional activated sludge process, denitrification hardly occurs, and the removal rate of total nitrogen is only between 10% and 30%. Therefore, for urban sewage and nitrogen-containing industrial wastewater, if the conventional activated sludge method is used for treatment, the effluent also contains a large amount of nitrogen and phosphorus. The sludge process is modified to increase the removal rate of nitrogen and phosphorus. The most representative ones are A / O method, A 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 彭永臻高大文王淑莹
Owner BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
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