Melthod of implementing low carbon nitrogen ratio high concentriation ammonia nitrogen waste water nitration

An ammonia nitrogen wastewater, short-range nitrification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of limited application and achieve the effect of maintaining long-term stable operation

Active Publication Date: 2006-06-14
江苏中宜金大环保产业技术研究院有限公司
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AI Technical Summary

Problems solved by technology

The SHARON process has successfully achieved short-cut nitrification. However, its control strategy based on the different growth rates of two types of nitrifying bacteria at high temperature determines that this process can only be applied to high-temperature wastewater, which limits its application.
[0004] CN1562799A discloses a quick start-up method for short-range nitrification of ammonia-containing wastewater, but this solution controls the temperature at 32-35°C, so the above-mentioned bottleneck still exists

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Inoculate 150ml of nitrifying granular sludge into an upflow aerobic bioreactor equipped with a three-phase separator on the upper part. The effective volume of the reactor is 1.2L. The sludge concentration in the reactor after inoculation is about 9.88gSS / L. The simulated high-ammonia-nitrogen wastewater is used as the reactor feed water, and the specific water quality is: ammonia nitrogen 500mg / L, COD 100mg / L. Dilute the simulated wastewater to an ammonia nitrogen concentration of 300mg / L as the reactor feedwater. The operating conditions of the reactor are: hydraulic retention time 24h, temperature between 24-27°C, pH value between 7.6-8.3, dissolved oxygen 2.0~3.0mg / L. When the removal rate of ammonia nitrogen reaches 85% and the operation is stable, gradually increase the concentration of ammonia nitrogen in the influent until it reaches 500mg / L. Gradually shorten the hydraulic retention time. After 28 days of operation, the hydraulic retention time is 12 hours. ...

Embodiment 2

[0022] Inoculate 150ml of nitrifying granular sludge into an upflow aerobic bioreactor equipped with a three-phase separator on the upper part. The effective volume of the reactor is 1.2L. The sludge concentration in the reactor after inoculation is about 9.88gSS / L. The simulated high-ammonia-nitrogen wastewater is used as the reactor feed water, and the specific water quality is: ammonia nitrogen 500mg / L, COD 100mg / L. Dilute the simulated wastewater to an ammonia nitrogen concentration of 300mg / L as the reactor feedwater. The operating conditions of the reactor are: hydraulic retention time 16h, temperature between 26-29°C, pH value between 7.8-8.5, dissolved oxygen 2.5~3.5mg / L. When the removal rate of ammonia nitrogen reaches 85% and the operation is stable, gradually increase the concentration of ammonia nitrogen in the influent until it reaches 500mg / L. Gradually shorten the hydraulic retention time. After 23 days of operation, the hydraulic retention time is 6 hours. 3...

Embodiment 3

[0024] Inoculate 150ml of nitrifying granular sludge into an upflow aerobic bioreactor equipped with a three-phase separator on the upper part. The effective volume of the reactor is 1.2L. The sludge concentration in the reactor after inoculation is about 9.88gSS / L. The simulated high-ammonia-nitrogen wastewater is used as the reactor feed water, and the specific water quality is: ammonia nitrogen 500mg / L, COD 100mg / L. Dilute the simulated wastewater to an ammonia nitrogen concentration of 300mg / L as the reactor feedwater. The operating conditions of the reactor are: hydraulic retention time 24h, temperature between 18-21°C, pH value between 7.6-8.3, dissolved oxygen 1.5~2.5mg / L. When the removal rate of ammonia nitrogen reaches 85% and the operation is stable, gradually increase the concentration of ammonia nitrogen in the influent until it reaches 500mg / L. Gradually shorten the hydraulic retention time. After 42 days of operation, the hydraulic retention time is 4 hours. 3...

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Abstract

The method for implementing low C / N ratio high concentration ammonia nitrogen waste water short-range nitrification includes the following steps: firstly inoculating nitrification granules sludge and placing it into an upflow type aerobic biological reactor with three-phase separator, related characteristic parameters of the nitrification granules sludge are: 62 plus or minus 4g USS / L and 79 plus or minus 3g SS / L; diluting high-concentration ammonia nitrogen waste water to make the ammonia nitrogen concentration be 200-300mg / L and using its as reactor feeding water, the hydraulic detention time of waste water in the reactor is 8-36h, the temperature of reactor interior is retained at 16-35deg.C, the pH value is 7.5-8.5 and dissolved oxygen concentration is 1.5-3.5mg / L; progressively reducing dilution multiple of high-concentration ammonia nitrogen waste water so as to increase ammonia nitrogen concentration is the feeding water until the waste water can be directly used as feeding water. When the ammonia nitrogen removal rate is up to 855 and its operation is stable, the hydraulic detention time can be progressively reduced to 3-15 hr so as to raise volume load of biological reactor.

Description

technical field [0001] The invention relates to a method for realizing short-range nitrification of wastewater with low C / N ratio and high concentration of ammonia nitrogen, and belongs to the technical field of wastewater biological treatment. Background technique [0002] Nitrogen removal is one of the important links in wastewater treatment. There are three methods of nitrogen removal in wastewater: physical method, chemical method and biological method, and biological method has been widely used in the denitrification treatment of wastewater because of its economy and effectiveness. However, since nitrifying bacteria are autotrophic bacteria with an extremely slow growth rate and are extremely sensitive to environmental factors, it is difficult to maintain a large number of nitrifying bacteria in the reactor, resulting in nitrification becoming the rate-limiting in wastewater biological nitrogen removal treatment. step. Studies have shown that the immobilization of nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F101/16
CPCY02W10/10
Inventor 任洪强魏翔袁粒张蓉蓉
Owner 江苏中宜金大环保产业技术研究院有限公司
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