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A method for starting nitrification reaction under microaerobic conditions

A technology of nitrification reaction and conditions, applied in chemical instruments and methods, aerobic and anaerobic process treatment, biological water/sewage treatment, etc. Large and other problems, to achieve the effect of saving energy consumption, reducing operating costs, and reducing aeration volume

Active Publication Date: 2019-07-26
SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to achieve the synergistic effect of the two biochemical reactions, it is usually required that DO≥2.0mg / L in the entire reaction system, which will lead to large aeration volume, high energy consumption, and technical constraints on the aeration device during actual operation. more demanding questions
In addition, nitrifying bacteria have a long generation time and slow reproduction, which is also one of the technical bottlenecks in the entire denitrification process.

Method used

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  • A method for starting nitrification reaction under microaerobic conditions
  • A method for starting nitrification reaction under microaerobic conditions

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Embodiment

[0026] The water quality parameters of a wastewater containing ammonia nitrogen are as follows: pH 7.8-8.3, COD cr 0-10mg / L, NH 4 + -N 80-120mg / L, NO 2 - -N 0.0mg / L, NO 3 - -N 2.0-2.3mg / L.

[0027] Process flow of the present invention is:

[0028] (1) Seed mud preparation. Ordinary activated sludge from the secondary sedimentation tank of urban sewage treatment plant is used as the seed sludge, the color is light yellowish brown, the pH is in the range of 7.0-7.2, and the MLSS is in the range of 3000-4000mg / L. After 12 hours of precipitation, MLSS is in the range of 14000-14500mg / L, and MLVSS is in the range of 8000-8500mg / L;

[0029] (2) Inoculate seed mud. After the seed sludge in step (1) is aerated with air for 72 hours, the sludge concentration is adjusted within the range of 14000-14500 mg / L. Get 2.5L of this sludge and pour it into the SBAF reactor with combined filler suspended and an effective volume of 3L;

[0030] (3) Biological hanging film. The botto...

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Abstract

The invention belongs to the field of ammonia-nitrogen wastewater treatment and discloses a method for starting nitration reaction in a microaerobic condition. The method is wastewater treatment technology and includes following steps: (1), preparing seed sludge; (2), inoculating the seed sludge; (3), performing biofilm colonization; (4), starting running. In the microaerobic condition, stable increase of nitration bacteria can still be maintained, nitration reaction is enhanced, aeration quantity in the process when a nitration system runs is remarkably lowered, energy consumption is saved, and running cost of the nitration system is lowered substantially.

Description

technical field [0001] The invention belongs to the field of wastewater treatment containing ammonia nitrogen, and in particular relates to a method for starting nitrification reaction under micro-oxygen conditions, which is mainly used for treating ammonia nitrogen wastewater. Background technique [0002] my country is a major emitter of ammonia nitrogen wastewater, and fertilizers, coking, petrochemical, pharmaceutical, food, and landfills are the main sources of ammonia nitrogen wastewater. After the wastewater is discharged into the water body, it will lead to eutrophication of the water body, cause the water body to be black and smelly, increase the technical difficulty and economic cost of wastewater treatment, and affect the ecological health of the population and the biological environment. [0003] Traditional biological denitrification mainly adopts nitrification-denitrification denitrification technology, specifically: in an aerobic environment, ammonia nitrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/30C02F101/10C02F101/16C02F101/20
CPCC02F3/12C02F3/1278C02F3/302C02F2101/10C02F2101/105C02F2101/16C02F2101/20C02F2101/206C02F2209/003C02F2209/02C02F2209/15C02F2209/22C02F2209/38Y02W10/10
Inventor 岳秀于广平刘竹寒吉世明唐嘉丽
Owner SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI
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