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Mainstream autotrophic nitrogen removal recreation system and method based on MBBR

An autotrophic denitrification and denitrification technology, applied in chemical instruments and methods, water treatment parameter control, multi-stage water treatment, etc., can solve the problems of microbial degradation of autotrophic denitrification function, cumbersome system startup method, etc.

Pending Publication Date: 2019-10-29
QINGDAO SPRING WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system start-up method involved in this invention is relatively cumbersome, and there may be a situation where the autotrophic denitrification function microorganisms may degrade during long-term operation

Method used

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  • Mainstream autotrophic nitrogen removal recreation system and method based on MBBR

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Experimental program
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Effect test

Embodiment 1

[0109] A sewage treatment plant with a design water volume of 20,000m 3 / d, influent COD, BOD 5 , NH 3 The design values ​​of , TN, and TP are 500, 260, 55, 70, and 9mg / L respectively. The original AAO process has unstable treatment effects, and the effluent is easy to exceed the standard when the water quality and quantity are impacted. After the transformation of autotrophic denitrification based on mainstream MBBR, The sum of the total residence time is 10.3h; the sludge concentration of anaerobic tank, anoxic tank and aerobic decarbonization tank is 2500-3000mg / L; the water temperature is 13-24℃, and the sludge age of the activated sludge system changes with the water temperature Adjustment, when the water temperature is 13-20°C, the sludge age is 2.5d; when the water temperature is 20-24°C, the sludge age is 5.5d; anaerobic pool ORP2 d, DO is 1.5-2.0mg / L; the filling rate of the suspended carrier in the second autotrophic denitrification tank is 50%, and the membrane sur...

Embodiment 2

[0111] The process parameters are set as follows:

[0112] An integrated equipment with a design water volume of 300m 3 / d, influent COD, BOD 5 , NH 3 The design values ​​of , TN, and TP are 410, 220, 31, 39, and 5.5mg / L, respectively. They were originally treated by the AAO process, and the treatment was unstable. The poor nitrification effect in winter resulted in the initial return of NH 4 + And TN exceeds the standard. After the autotrophic denitrification transformation based on mainstream MBBR, the total residence time is 8.0h; the sludge concentration of anaerobic tank, anoxic tank and aerobic decarbonization tank is 2500-3000mg / L; The water temperature is 12-27°C, the sludge age of the activated sludge system is adjusted with the water temperature, when the water temperature is 12-20°C, the sludge age is 2.0d, when the water temperature is 20-27°C, the sludge age is 6.0d; anaerobic Pond ORP2 d, DO is 1.5-2.0mg / L; the filling rate of the suspended carrier in the sec...

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Abstract

The invention discloses a mainstream autotrophic nitrogen removal recreation system and method based on an MBBR, and belongs to the technical field of sewage biological nitrogen removal. The technicalproblems that recreation is complex, the load is low, operation is instable, and discharging water does not reach the standard in the prior art are solved. The mainstream autotrophic nitrogen removalrecreation system can be recreated through an AAO technology in the original pond, and recreation comprises flow direction among pond bodies and division of function areas. The mainstream autotrophicnitrogen removal system after recreation comprises two groups of nitrogen removal systems, each groups of the nitrogen removal system comprises an anaerobic pond, an anoxic pond, an aerobiotic decarburization pond, a first autotrophic nitrogen removal pond, a second autotrophic nitrogen removal pond, an aerobiotic nitrating pond, a degassing pond, a settling pond, an aerobiotic decarburization pond water outlet pipeline, an autotrophic nitrogen removal pond water inlet pipeline, a sludge reflux pipeline, a nitrated liquid reflux pipeline and a tail water reflux unit. According to the mainstream autotrophic nitrogen removal system and method based on the MBBR, inlet water can be changed to be high ammonia-nitrogen wastewater from mainstream sewage in a short time according to the processing effect of the nitrogen removal system, through common processing of the two groups of the nitrogen removal systems, the mainstream sewage is processed stably and effectively, and outlet water quality index can reach the class earth surface IV-class water standard.

Description

technical field [0001] The invention relates to the technical field of sewage biological denitrification, in particular to an MBBR-based mainstream autotrophic denitrification transformation system and transformation method. Background technique [0002] The development of autotrophic denitrification process has become a new path for efficient biological denitrification of urban mainstream sewage with high carbon-nitrogen ratio. At present, although the mainstream sewage autotrophic denitrification technology has achieved certain results, there are still many problems. The main bottleneck is the stable operation of the system. First of all, since the autotrophic denitrification functional microorganisms AOB and AnAOB both need ammonia nitrogen as a metabolic substrate, the abundance of the two has a clear correlation with the concentration of ammonia nitrogen in the influent, while the low ammonia nitrogen wastewater represented by urban mainstream sewage, due to the guarant...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/16C02F101/10
CPCC02F3/308C02F1/52C02F2203/006C02F2301/08C02F2301/046C02F2101/30C02F2101/16C02F2101/105C02F2209/08C02F2209/14C02F2209/16C02F2209/10Y02W10/10
Inventor 吴迪韩文杰管勇杰周家中
Owner QINGDAO SPRING WATER TREATMENT
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