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Method for controlling sewage biochemistry treatment process nitration reaction process

A technology of biochemical treatment and nitrification reaction, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of difficult stable control of nitrification reaction process and low denitrification efficiency, and achieve Good wastewater treatment effect, fast denitrification rate, strong tolerance and adaptability

Active Publication Date: 2014-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the existing short-range nitrification and denitrification process that the nitrification reaction process is difficult to be stably controlled and the denitrification efficiency is low, the present invention starts with microorganisms responsible for denitrification, and adds microorganisms that use nitrite to perform denitrification and denitrification into sewage Bacteria to achieve nitrification process control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of embodiment 1 microbial bacterial agent

[0028] 1. Arthrobacter FDN-1 of the present invention and Flavobacterium waterii FDN-2 are respectively inoculated on beef extract peptone solid medium and activated in a constant temperature incubator at 30°C. The formula of the medium is: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L, add 2.0% agar.

[0029] 2. Scrape a ring of solid bacteria with an inoculation loop to inoculate in the beef extract peptone liquid culture solution, and culture under aerobic conditions at a temperature of 25~35°C and 150~240rpm with shaking for 1~3 days to logarithmic growth phase to obtain liquid bacteria agent seed solution; medium formula is: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L.

[0030] 3. Combining the above-mentioned Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 seed liquids according to the two ratios of 1:1 and 0.5:1 respectively in a reactor with a good stirring system for amplified cultu...

Embodiment 2

[0032] Example 2 Control of catalyst wastewater denitrification process

[0033] The experiment was carried out in two 100L SBR (batch activated sludge process) reactors, and methanol was used as a carbon source for supplementation, so that the mass ratio of carbon to nitrogen was 3:1, and the concentration of ammonia nitrogen was 800mg / L. First, the same concentration of nitrifying activated sludge was added to two reactors, and 300 mL of the microbial agent B of Example 1 was added to one of them. In the initial stage of the reaction, water was fed at one time, and 21 hours were divided into 3 cycles, and each cycle was divided into two stages of aeration for 4.5 hours and stirring for 2.5 hours. The temperature is around 26°C, the pH is 7.8-8.5, the dissolved oxygen in the aeration stage is 0.5 mg / L ~2.0mg / L, and the treatment time is 21 hours. The nitrification rate of a certain aeration stage was compared with the removal rate of ammonia nitrogen and total nitrogen at ...

Embodiment 3

[0035] Example 3 Control of SBR denitrification system in a sewage treatment plant

[0036] A sewage treatment plant mainly produces ammonia-containing wastewater produced in the process of nitrogen fertilizer production, and adopts SBR process for treatment. The average influent ammonia nitrogen concentration is 475mg / L, and the COD concentration is 1100mg / L. After treatment, the average removal rate of ammonia nitrogen is about 80%. The microbial agent A and microbial agent B obtained in Example 1 (the volume ratio of the two is 1:1) are added to the system at 0.10%, and the operating condition is a temperature of 29 ℃, pH7.8-8.2, dissolved oxygen 0.5 mg / L ~2.0mg / L, after 3 days of operation, the nitrosation rate increased to 90%, and the removal rate of ammonia nitrogen reached more than 90%.

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Abstract

The invention discloses a method for controlling the process of nitrification reaction in the sewage biochemical treatment process, which is realized by adding microbial bacterial agents using nitrite for denitrification and denitrification to the sewage biochemical treatment process, and the ammoniacal sewage treatment temperature is 18- 40℃, dissolved oxygen is 0.1~3mg / L, pH is 7-9. The present invention uses nitrite as the electron acceptor microbial bacterial agent to carry out denitrification and denitrification, which can remove nitrite in time, reduce the concentration of the substrate where the nitrification reaction continues to occur, and ensure that the nitrification reaction only proceeds to the nitrous acid stage. Nitrogen can also effectively remove COD in wastewater, the wastewater treatment effect is good, the denitrification rate is fast, and the process of short-range denitrification can be stably controlled, and the denitrification of short-range nitrification and denitrification can be truly realized.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage biological treatment, in particular to a method for effectively controlling the process of nitrification reaction in the process of biochemical treatment of ammonia nitrogen-containing sewage, in particular to a microbial agent with nitrite as an electron acceptor to control nitrification reaction method of the process. Background technique [0002] Short-range nitrification-denitrification, also known as nitrous acid biological denitrification technology, is to control the nitrification process to NO 2 -N stage is terminated, followed by nitrite denitrification and denitrification. Compared with traditional biological denitrification technology, short-range nitrification-denitrification biological denitrification technology can shorten the hydraulic retention time, which can save 25% energy consumption and 40% carbon source, and can reduce the amount of residual sludge t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 高会杰孙丹凤许谦
Owner CHINA PETROLEUM & CHEM CORP
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