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Biological denitrification process of organic nitrogen waste water

A technology for biological denitrification and organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve waste liquid treatment difficulties, low treatment efficiency, physical denitrification Phosphorus removal technology does not have obvious removal effect, etc., to achieve the effect of short-range nitrification and denitrification

Active Publication Date: 2015-12-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common nitrogen and phosphorus removal methods include physical and chemical nitrogen and phosphorus removal methods and biochemical nitrogen and phosphorus removal methods. Since the removal effect of physical nitrogen and phosphorus removal technology is not obvious, the operation and maintenance costs are very expensive; The added chemical agents are uneconomical, and the waste liquid produced is difficult to treat, the operating cost is high, and it is very likely to cause secondary pollution to the environment. Therefore, biological nitrogen and phosphorus removal technology is a relatively economical and efficient method for treating wastewater. , are widely used in wastewater treatment
[0004] However, the treatment process of most wastewater treatment plants in my country is not reasonable enough, the treatment efficiency is not high, and the cost of wastewater treatment is high, so upgrading and transformation are needed to improve the efficiency of wastewater treatment and the quality of effluent from wastewater plants

Method used

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Embodiment 1

[0025] A biological denitrification process for organic wastewater, comprising the following steps:

[0026] (1) Solid-liquid separation is used for solid-liquid separation of organic wastewater to remove suspended solids, adjust the flow of wastewater, and control the wastewater to be sent into the anaerobic fluidized bed at a speed of 1.45m / s;

[0027] (2) Heterotrophic bacteria are coated on the anaerobic fluidized bed, and the wastewater flows through the anaerobic fluidized bed. The heterotrophic bacteria ammoniate pollutants such as protein and fat and release ammonia, and convert organic nitrogen into ammonia nitrogen. Then enter the separation membrane reaction bath, the mixed solution is filtered by the membrane under the suction of the outlet pump to form treated water, and the remaining organic matter is collected by the membrane to remove particulate pollutants in the sewage. The operation mode of the outlet pump is intermittent. Open for 6 minutes, stop for 6 minu...

Embodiment 2

[0031] A biological denitrification process for organic wastewater, comprising the following steps:

[0032] (1) Solid-liquid separation is used for solid-liquid separation of organic wastewater to remove suspended solids, adjust the flow rate of wastewater, and control the wastewater to be sent into the anaerobic fluidized bed at a speed of 1.55m / s;

[0033] (2) Heterotrophic bacteria are coated on the anaerobic fluidized bed, and the wastewater flows through the anaerobic fluidized bed. The heterotrophic bacteria ammoniate pollutants such as protein and fat and release ammonia, and convert organic nitrogen into ammonia nitrogen. Then enter the separation membrane reaction bath, the mixed solution is filtered by the membrane under the suction of the outlet pump to form treated water, and the remaining organic matter is collected by the membrane to remove particulate pollutants in the sewage. The operation mode of the outlet pump is intermittent. Open for 8 minutes and stop fo...

Embodiment 3

[0037] A biological denitrification process for organic wastewater, comprising the following steps:

[0038] (1) Solid-liquid separation is used for solid-liquid separation of organic waste water to remove suspended solids, adjust the waste water flow rate, and control the waste water to be sent into the anaerobic fluidized bed at a speed of 1.65m / s;

[0039] (2) Heterotrophic bacteria are coated on the anaerobic fluidized bed, and the wastewater flows through the anaerobic fluidized bed. The heterotrophic bacteria ammoniate pollutants such as protein and fat and release ammonia, and convert organic nitrogen into ammonia nitrogen. Then enter the separation membrane reaction bath, the mixed solution is filtered by the membrane under the suction of the outlet pump to form treated water, and the remaining organic matter is collected by the membrane to remove particulate pollutants in the sewage. The operation mode of the outlet pump is intermittent. Open for 10 minutes, stop for ...

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Abstract

The invention discloses a biological denitrification process of organic nitrogen waste water, and belongs to the technical field of waste water denitrification. The biological denitrification process comprises the following steps: (1) pre-treating the organic matter waste water, and then sending the pretreated organic matter waste water into an anaerobic fluidized bed at a given speed; (2) facilitating the waste water to flow by the anaerobic fluidized bed having heterotrophic bacteria, converting organic nitrogen to be ammonia nitrogen, and collecting the rest organic matters by utilizing a membrane; (3) enabling the waste water to enter a two-layer micro-organism membrane reaction tank, carrying out nitrous-acid nitration reaction by virtue of a first layer of microorganism membrane with nitrous-acid nitration bacteria, to generate nitrous acid; and carrying out the denitrification by virtue of a second layer of microorganism membrane with anaerobic ammoxidation bacteria. The entire process flow is reasonable in design, the operation condition is easy to implement, the cost is low, the denitrification rate is extremely high, and the biological denitrification process is suitable for continuous mass treatment on the organic matter waste water.

Description

technical field [0001] The invention belongs to the technical field of denitrification of waste water, and specifically relates to a biological denitrification process of organic nitrogen waste water. Background technique [0002] With the continuous advancement of the industrialization process, it has caused increasingly serious environmental pollution, especially water pollution, which has exacerbated the shortage of water resources. The problem of water resources has become an important factor affecting the sustainable development of China's economy and society. The recycling and utilization of wastewater has a great effect on alleviating the shortage of urban water resources. After proper regeneration treatment, wastewater can be reused for landscape water, green irrigation, industrial cooling and other purposes to realize the reuse of water resources. Among them, high-concentration ammonia-nitrogen wastewater is one of the most difficult types of industrial wastewater t...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 耿金菊任洪强许柯丁丽丽
Owner NANJING UNIV
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