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Method for removing total nitrogen by using microorganism

A technology of microorganisms and microbial flora, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the total nitrogen in effluent cannot be effectively controlled.

Active Publication Date: 2008-09-10
浙江汉蓝环境科技有限公司
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  • 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 removing total nitrogen by using microorganism
  • Method for removing total nitrogen by using microorganism
  • Method for removing total nitrogen by using microorganism

Examples

Experimental program
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Effect test

Embodiment 1

[0126] 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, before entering the system, it passes through the air flotation pool set in front of the multi-functional pool, and after the air flotation pool pretreatment removes oil, suspended solids and slag, it enters the system In the multifunctional pool, waste water and HSBEMBM with activated carbon as the carrier in the multifunctional pool under the condition of micro-stirring Microbes perform biochemical reactions to degrade some harmful substances in sewage, and at the same time improve the biodegradability of sewage, creating conditions for the next stage of treatment. In order to meet the needs of the biochemical reaction in the multifunctional pool and provide the nutrient phosphorus source for the microorganisms, a phosphorus salt dosing pipeline is set up in the multifunctional pool. The multipurpose pool is running:

[0127] P:...

Embodiment 2

[0144] 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 removing oil, suspended solids and slag, the pretreatment enters the multifunctional reaction tank, and the multifunctional tank uses the aeration device. Under the aeration operation mode, the wastewater and the HSBEMBM microorganisms in the tank with activated carbon as the carrier perform 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%. Various indicators that have an impact on nitrification shall not exceed 50 mg / L; the wastewater from the multi-functional reaction tank will pass through the primary sedimentation tank, and the sludge will flow back to the m...

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Abstract

The invention relates to a method of removing total nitrogen in urban sewage and highly concentrated nitrogen industrial wastewater with microorganisms. Wastewater passes an anaerobic pool, an aerobic pool and a secondary sedimentation pool in sequence for two-stage biochemical treatment. The method is characterized in that the wastewater enters a multifunctional pond before entering the anaerobic pool, wherein the multifunctional pond is provided with an aeration pipe and a stirring device. When B / C of the wastewater treated is less than 0.3, the multifunctional pond runs in the stirring way; when B / C of the wastewater treated is more than or equal to 0.3, the multifunctional pond runs in the aeration way. Effluent in the aerobic pool passes a facultative tank before entering the secondary sedimentation pool. The method is simple in technology procedures, is suitable for inflow with different natures, reduces the construction cost, improves the treating ability and meanwhile plays a role in energy conservation and consumption reduction. The facultative tank arranged at the rear section carries out anti-digestion total nitrogen removal for the whole system and the total nitrogen removing effect is notably better than the prior A / O technology.

Description

technical field [0001] The invention belongs to the technical field of using microorganisms to treat wastewater, in particular to a method for removing total nitrogen by using microorganisms for urban sewage and high-concentration nitrogen industrial wastewater. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 凌亮
Owner 浙江汉蓝环境科技有限公司
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