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Method for treating total nitrogen in coal chemical wastewater by using microbes

A technology for coal chemical wastewater and microbial treatment, applied in biological water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problem that the total nitrogen in the effluent cannot be effectively controlled, so as to reduce construction costs, The process flow is simple and the effect of improving the processing capacity

Inactive Publication Date: 2011-11-23
浙江汉蓝环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the technical problem that the total nitrogen in the effluent cannot be effectively controlled when the A / O process is used to treat high-concentration nitrogen wastewater or other wastewater

Method used

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  • Method for treating total nitrogen in coal chemical wastewater by using microbes
  • Method for treating total nitrogen in coal chemical wastewater by using microbes
  • Method for treating total nitrogen in coal chemical wastewater by using microbes

Examples

Experimental program
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Embodiment 1

[0034] High-concentration nitrobenzene industrial wastewater with a flow rate of 100m 3 / h, its COD>5500mg / L, ammonia nitrogen>350mg / L, B / C=0.27. Under the condition of stirring, the wastewater and the anammox bacteria in the Anammox pool with activated carbon as the carrier undergo a biochemical reaction, degrade some harmful substances in the sewage, improve the biodegradability of the sewage, and simultaneously denitrify and anammox. nitrogen. In order to meet the needs of the biochemical reaction in the Anammox pool and provide the nutrient phosphorus source for the microorganisms, a phosphorus salt dosing pipeline is set up in the Anammox pool. Anammox pool running:

[0035] P: 4mg / l PH: 7.5 Water temperature: 30℃

[0036] The effluent from the Anammox tank enters the first aerobic tank for nitrification reaction, the effluent from the first aerobic tank enters the first sedimentation tank for mud-water separation, and the sludge returns to the Anammox tank, the sludge...

Embodiment 2

[0051] High-concentration coking wastewater, its COD is about 4500mg / L, ammonia nitrogen is about 350mg / L, volatile phenol is about 1800mg / L, and total cyanide is about 70mg / L. After the suspended solids and slag enter the Anammox pool, the Anammox pool uses the aeration device. Under the aeration mode, the wastewater and the anammox bacteria in the pool with activated carbon as the carrier undergo biochemical reactions, and the temperature is controlled at 15-40°C. pH value 6.5~9.0, dissolved oxygen 0.6~3.2mg / L, sludge sedimentation ratio SV 30 10%-25%, residence time 12-28 hours, influent COD index 1500-3500mg / L, effluent COD index 400-650mg / L, COD degradation efficiency 40%-75%. The various indexes affected by nitrification shall not exceed 50 mg / L; the wastewater from the Anammox pool enters the first aerobic pool. Other implementations are the same as in Embodiment 1.

[0052] As shown in Table 2, the effluent quality after treatment in this embodiment is: COD3 -N<3mg / L...

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Abstract

The invention discloses a method for treating total nitrogen in coal chemical wastewater by using microbes. The method is characterized in that the wastewater sequentially passes through a first aerobic tank, a first sedimentation tank, a facultative tank, a second aerobic tank and a second sedimentation tank to be subjected to two-stage biochemical treatment; microorganisms and microbial carriers are added into the first aerobic tank, the facultative tank and the second aerobic tank; before entering into the first aerobic tank, the wastewater passes through an Anammox tank, anammox bacterias and carrier activated carbon are added into the Anammox tank, and an aeration device and a mixing device are also arranged in the Anammox tank. The method disclosed by the invention is concise in technological process, and an Anammox tank is adopted in the first stage of the method, and different operation modes can be adopted according to different water qualities, so that the Anammox tank is adapted to fed water with different natures, thereby reducing the construction cost, improving the treatment capacity, and achieving an effect of energy conservation and consumption reduction. Because the total nitrogen is removed through two-stage A / O (hydrolytic acidification / oxic treatment) and anaerobic ammonia oxidation, the total nitrogen removal effect is obviously better than that achieved in the existing A / O process.

Description

technical field [0001] The invention relates to the field of biochemical environmental protection, in particular to a method for treating total nitrogen in coal chemical wastewater by using microorganisms. Background technique [0002] At present, nitrogen is one of the main elements that cause eutrophication in lakes, inland seas and other closed waters. It will cause excessive proliferation of algae, resulting in eutrophication of water bodies, a large number of algae death will consume oxygen in the water, and some algae protein toxins can be enriched in organisms and poison people through the food chain. All countries have strict restrictions on the discharge of nitrogen-containing substances in wastewater. And with the continuous development of industrial and agricultural production, water pollution caused by nitrogen is becoming more and more serious. The continuous tightening of sewage discharge standards is a common development trend in all countries in the world. ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F3/34C02F3/307C02F3/30
Inventor 凌亮潘关祥
Owner 浙江汉蓝环境科技有限公司
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