Catalytic oxidation coupling high-efficiency biochemical system
A biochemical system, catalytic oxidation technology, applied in the directions of oxidized water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Changes, etc.
Inactive Publication Date: 2014-01-22
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology
It has a high concentration of organic matter, poor biodegradability, and most of them are toxic and harmful substances
The water volume and pH of the wastewater vary greatly, often forming an impact load. It is difficult to remove the refractory substances in the wastewater with the existing secondary biological treatment technology
In addition, due to the inhibition of toxic and harmful substances in wastewater, the secondary biochemical treatment can hardly remove ammonia nitrogen, and because organic nitrogen compounds are hydrolyzed into ammonia nitrogen, the ammonia nitrogen in the wastewater will increase instead.
At present, it is difficult for enterprise drainage to meet the requirements of COD ≤ 120 mg / L and ammonia nitrogen ≤ 50 mg / L in the secondary standard of GB 8978-1996 "Comprehensive Wastewater Discharge Standard"
Method used
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Embodiment 1
[0009] Catalytic oxidation coupling high-efficiency biochemical system, including sequentially connected HENT tank, membrane filter tank and ozone catalytic oxidation tower.
[0010] HENT uses a sequencing batch bioreactor fed with high-efficiency nitrification sludge. Among them, high-efficiency nitrification sludge is obtained from the activated sludge in the MBR of the sewage treatment station of CNOOC Tianjin Chemical Research and Design Institute after elutriation, screening and domestication. The operation cycle of HENT is 6 h, the reaction time per cycle is 4.5 h, the reactor water filling ratio is 3, the sludge mass concentration is 1 200-1 500 mg / L, and the daily treatment water volume is 0.5 m 3 .
[0011] The PVDF microporous membrane provided by Tianjin Sennuo Filtration Technology Co., Ltd. is used, with a membrane pore size of 0.2 μm and an effective area of 1 m 2 , the design water production volume is 20 m, pump suction water production. During the test, t...
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Abstract
The invention relates to an advanced treatment device of petrochemical wastewater, and discloses a catalytic oxidation coupling high-efficiency biochemical system comprising successively connected a HENT (high-efficiency nitrification tank), a membrane filtration pool and an ozone catalytic oxidation tower. The catalytic oxidation coupling high-efficiency biochemical system for advanced treatment of secondary biochemical effluent of the petrochemical wastewater can solves the problems that secondary biochemical effluent COD and ammonia nitrogen are difficult to reach the standard. After advanced treatment, the average effluent COD is 59 mg / L with the average removal rate of 78%, the effluent ammonia nitrogen is 0.36 mg / L with the average removal rate of 99.8%, and the effluent COD and ammonia nitrogen both reach discharge standard requirements.
Description
technical field [0001] The invention relates to a device for advanced treatment of petrochemical wastewater. Background technique [0002] The petrochemical wastewater produced by enterprises has complex components, and the main pollutants are polymers, inorganic cyanide, ammonia nitrogen and a large amount of organic nitrogen compounds. The concentration of organic matter is high, the biodegradability is poor, and most of them are poisonous and harmful substances. The volume and pH of the wastewater vary greatly, and impact loads are often formed. It is difficult to remove refractory substances in the wastewater with the existing secondary biological treatment technology. In addition, due to the inhibition of toxic and harmful substances in wastewater, secondary biochemical treatment can hardly remove ammonia nitrogen, and because organic nitrogen compounds are hydrolyzed into ammonia nitrogen, ammonia nitrogen in wastewater will increase instead. At present, it is ...
Claims
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IPC IPC(8): C02F9/14C02F1/78C02F1/44
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM