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A kind of livestock and poultry manure wastewater treatment method

A technology for wastewater treatment, livestock and poultry manure, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of small C/N ratio, poor biodegradability, denitrifying carbon Insufficient sources and other problems to achieve the effect of reducing the pressure of the treatment equipment, preventing acidification, and achieving a good treatment effect

Inactive Publication Date: 2011-12-14
CHONGQING UNIV
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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention aims to solve the problems of poor biodegradability, small C / N ratio, insufficient denitrification carbon source in the aerobic post-treatment system, and poor treatment effect in the existing livestock and poultry manure wastewater treatment technology, and provides A treatment method for livestock and poultry manure wastewater with good treatment effect

Method used

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  • A kind of livestock and poultry manure wastewater treatment method
  • A kind of livestock and poultry manure wastewater treatment method
  • A kind of livestock and poultry manure wastewater treatment method

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[0034] (a) Take fresh pig manure and urine waste water and filter it through a 1mm double-layer iron sand mesh. The main parameters of the filtered pig manure and urine waste water are COD 20000mg / L, NH 4 + The concentration of nitrite nitrogen is 887 mg / L, the concentration of nitrite nitrogen is 17 mg / L, the concentration of nitrate nitrogen is 42 mg / L, the effluent-reflux ratio is 1:1, and the influent load is 2.6 kgCOD·m -3 d -1 And the concentration of nitrous nitrogen is 165mg / l. The effective volume of the CSTR reactor is 15L, the pH inside the CSTR reactor is controlled to be 7.5, the temperature of the heating circulating water tank is controlled between 30-35°C, the stirring frequency is controlled by a timer, and the stirring rule of the CSTR reactor is 20 minutes each time. Stir once every 4 hours, the stirring frequency is 30 r / min, the hydraulic retention time is 10d, and the volume of incoming and outgoing water is the same. After testing, the final COD remov...

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Abstract

The invention discloses a livestock and poultry manure wastewater processing method. The method is characterized in that: a methane production process and a denitrification treatment are simultaneously carried out by using a CSTR reactor; and a nitration and denitrification treatment is carried out by using an MSBR reaction tank. According to the invention, the methane production process and the denitrification treatment are integrated into a whole. With the short-range nitration and denitrification treatment of the MSBR, wastewater COD, nitrite and ammonia nitrogen can be removed simultaneously. Further, with the method, 40% of carbon source, 25% of oxygen demand and 300% of sludge production can be saved.

Description

technical field [0001] The invention relates to a livestock and poultry manure water treatment technology, in particular to realize the removal of COD, nitrite nitrogen and ammonia nitrogen from livestock and poultry manure wastewater based on CSTR methanogenic denitrification combined with MSBR nitrification and denitrification process. [0002] Background technique [0003] Many livestock and poultry farms in the Chongqing Three Gorges Reservoir area are built along the banks of secondary tributaries. Most of the livestock and poultry discharges are directly discharged into the water body without treatment. Livestock and poultry manure has become one of the main pollution sources of the Three Gorges Reservoir, seriously threatening the water quality of the Three Gorges Reservoir area. environment safety. And along with the economic growth, in the long term in the future, the aquaculture industry will further develop, and its livestock and poultry manure will definitely ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 彭绪亚刘国涛何清明李治阳袁荣焕
Owner CHONGQING UNIV
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