Method for stabilizing nitrosification based on ammonia-nitrogen adsorption material strengthened membrane bioreactor

A membrane bioreactor, bioreactor technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problem of no stable nitrosation method, etc., and achieve stable and efficient nitrosation and ammonia nitrogen. Efficacy of high treatment loads and reduced toxic effects

Inactive Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For membrane bioreactors, no one has used ammonia nitrogen adsorption materials to achieve stable nitrosation methods in membrane bioreactors

Method used

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  • Method for stabilizing nitrosification based on ammonia-nitrogen adsorption material strengthened membrane bioreactor

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Effect test

Embodiment 1

[0029] A method for stabilizing nitrification in a membrane bioreactor based on an ammonia nitrogen adsorption material, comprising the following steps:

[0030] (1) In the membrane bioreactor, add aerobic nitrification sludge with a sludge concentration of 3500mg / L, and add ammonia nitrogen (such as ammonium chloride) at a dissolved oxygen of 0.1-1.0mg / L and a temperature of 38°C , the concentration of ammonia nitrogen was 50mg / L, and the stuffy exposure was carried out. After 1 day of stuffy exposure, the removal rate of ammonia nitrogen was 97.4%, and the sludge cultivation was successful;

[0031] (2) After the sludge cultivation is completed, add artificial zeolite with a particle size of 100-200 mesh to the membrane bioreactor, and the dosage is 1%wt; then the ammonia nitrogen concentration is about 100mg / L, and the nitrite nitrogen concentration Wastewater with a concentration of 0.1mg / L, a concentration of nitrate nitrogen of 0.2mg / L, and a pH of 9.5 is passed into the...

Embodiment 2

[0033] A method for stabilizing nitrification in a membrane bioreactor based on an ammonia nitrogen adsorption material, comprising the following steps:

[0034] (1) In the membrane bioreactor, add aerobic activated sludge with a sludge concentration of 5500mg / L, add ammonia nitrogen at a dissolved oxygen of 2.0-3.0mg / L and a temperature of 28°C, and the concentration of ammonia nitrogen is 200mg / L , carried out stuffy exposure, after 2 days of stuffy exposure, the removal rate of ammonia nitrogen was 92.7%, and the sludge cultivation was successful;

[0035] (2) After the sludge cultivation is completed, add natural zeolite with a particle size of 80-100 mesh to the membrane bioreactor, and the dosage is 3%wt; then the ammonia nitrogen concentration is about 350mg / L, and the nitrite nitrogen concentration 0.8mg / L, nitrate nitrogen concentration 1.0mg / L, pH 7.9 waste water is passed into the membrane bioreactor, dissolved oxygen is controlled at 2.0-3.0mg / L, water temperature ...

Embodiment 3

[0037] A method for stabilizing nitrification in a membrane bioreactor based on an ammonia nitrogen adsorption material, comprising the following steps:

[0038] (1) In the membrane bioreactor, add aerobic activated sludge with a sludge concentration of 7000mg / L, add ammonia nitrogen at a dissolved oxygen of 4.0-5.0mg / L and a temperature of 24°C, and the ammonia nitrogen concentration is 200mg / L , carry out stuffy exposure, after 2 days of stuffy exposure, the removal rate of ammonia nitrogen is 90.7%, and the sludge cultivation is successful;

[0039] (2) After the sludge cultivation is completed, add artificial zeolite with a particle size of 200 to 400 mesh into the membrane bioreactor, and the dosage is 5% wt, and then the ammonia nitrogen concentration is about 600mg / L, and the nitrite nitrogen concentration is about 600mg / L. 0.0mg / L, nitrate nitrogen concentration 0.0mg / L, pH 8.2 waste water is passed into the membrane bioreactor, the dissolved oxygen is controlled at 4....

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Abstract

The invention belongs to the technical field of environmental engineering biological sewage treatment, and discloses a method for stabilizing nitrosification based on an ammonia-nitrogen adsorption material strengthened membrane bioreactor. The method comprises the following steps: (1) carrying out cultivation of aerobic nitrifying sludge inside the membrane bioreactor; (2) after the cultivation is completed, adding a material with an ammonia-nitrogen adsorption characteristic into the membrane bioreactor, then introducing ammonia-nitrogen wastewater into the membrane bioreactor, after the reaction for certain hydraulic retention time under dissolved oxygen of 0.1 to 7.0 mg/L at the temperature of 20 to 40 DEG C, and discharging water to realize efficient and stable nitrosification of ammonia-nitrogen wastewater. According to the method disclosed by the invention, efficient nitrosification of the reactor can be realized stably, and the shock resistance of the reactor can be improved, so that the toxic effect of the high-concentration ammonia-nitrogen wastewater on microorganisms is reduced; the method is simple, and the occupied area is small; and moreover, the ammonia-nitrogen treatment load is higher, and the nitrosification is more stable and efficient.

Description

technical field [0001] The invention belongs to the field of biological treatment of sewage in environmental engineering, and specifically relates to a method for stabilizing nitrosation in a membrane bioreactor based on ammonia nitrogen adsorption materials, which is suitable for inorganic chemical industry, chemical fertilizer industry, printing and dyeing industry, metal surface treatment industry, circuit board industry, garbage Treatment of leachate and other wastewater containing high ammonia nitrogen concentration. Background technique [0002] In order to economically and energy-savingly treat ammonia-nitrogen wastewater, the anammox process based on autotrophic microorganism anammox bacteria has become the preferred biological denitrification process. According to the principle of anaerobic ammonium oxidation reaction, the anaerobic ammonium oxidation process only needs to convert about half of the ammonia nitrogen into nitrite nitrogen, and the whole denitrificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/28C02F101/16
CPCC02F1/281C02F3/1268C02F2101/16C02F2209/22Y02W10/10
Inventor 汪晓军陈振国顾晓扬简磊
Owner SOUTH CHINA UNIV OF TECH
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