An online calculation method of carbon source dosage based on denitrification process in anoxic tank
A calculation method and anoxic pool technology, applied in chemical instruments and methods, anaerobic digestion treatment, special compound water treatment, etc., can solve problems such as increased operating costs, waste of chemicals, consumption of aeration volume, etc., to avoid waste of chemicals , high cost-effectiveness ratio, and the effect of avoiding secondary pollution
Active Publication Date: 2021-12-28
上海昊沧系统控制技术有限责任公司
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[0005] Insufficient carbon source dosage will lead to insufficient denitrification, affecting the discharge of total nitrogen in the effluent; while excessive carbon source dosage will cause waste of chemicals and increase operating costs on the one hand, and on the other hand will lead to an increase in organic matter in the sewage and COD in the effluent. The risk of exceeding the standard increases, which increases the burden of COD treatment, and thus consumes additional aeration volume, further increasing the energy consumption and operating costs of the system
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[0060] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0061] Taking a sewage plant as a pilot project, the design inflow flow of the plant is 50,000 tons / day, which is equivalent to 2083m 3 / h, the carbon source dosing pump is dual-purpose and one standby, and the design dosage of a single pump is 180L / h. The concentration of nitrate nitrogen in the anoxic pool is less than 1mg / L, the average concentration of activated sludge in the pool is about 3500mg / L, and the surface area of the pool is 625m 2 , the liquid level is maintained at about 5 meters. The whole plant has two sets of parallel treatment processes, corresponding to two anoxic pools, one of which is selected to add carbon source according to the method of the present invention, and the other still uses the traditional dosing mode, only based on the measured value of nitrate nitrogen and The deviation of the set value is used to calculate the...
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The invention discloses an online calculation method of carbon source dosage based on the denitrification process of the anoxic pool. The actual concentration of state nitrogen meets the carbon source dosage required for the set concentration of nitrate nitrogen, which reflects the real demand for carbon source in the denitrification process, and avoids the waste of chemicals and secondary pollution caused by excessive carbon source dosage, or The quality of effluent water exceeds the standard due to insufficient carbon source dosing.
Description
technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an online calculation method for carbon source dosage based on the denitrification process of anoxic pools. Background technique [0002] Denitrification reaction is a key link in the sewage denitrification treatment process, which is related to the removal effect of total nitrogen. [0003] The main place where the denitrification reaction occurs is in the anoxic tank of the biochemical treatment process. The heterotrophic bacteria in the activated sludge in the anoxic tank preferentially use the nitrate nitrogen in the refluxing nitrification liquid as the electron acceptor to convert the nitrate nitrogen into nitrogen gas. It is removed from the water body and at the same time consumes organic pollutants as substrates for microbial growth to complete the denitrification process. Therefore, if the concentration of organic matter entering the anoxic pool is low, it w...
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IPC IPC(8): C02F3/28
CPCC02F3/28C02F2209/15C02F2209/42C02F2305/06
Inventor 胡晓东方荣兆范岳峰
Owner 上海昊沧系统控制技术有限责任公司