Biofilm culturing method of biofilm reactor with nitrogen and phosphorus removal function

A biofilm reactor, denitrification and phosphorus removal technology, applied in chemical instruments and methods, biological treatment devices, biological water/sewage treatment, etc. It can improve the aerobic phosphorus absorption capacity, improve the effect of film hanging, and improve the effect of effective transmission.

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105565480A discloses a film-hanging method for carrier filler in a moving bed biofilm reactor. By simultaneously draining and replenishing the separated waste water to the moving bed biofilm reactor, dynamic cultivation is carried out, and the activated sludge is refluxed. This method requires monitoring Sludge concentration, inconvenient operation
CN106542655A discloses a method for fast film-forming of high-efficiency denitrification microbial bacterial agents. The method uses an aerobic nitrification reactor to form film, which can solve the problems of long time for denitrification microbial film-forming, poor adhesion, complicated operation, low biomass, and impact resistance. The defect of load difference can increase the fixation amount of nitrifying bacteria, and the film-hanging speed is fast, which can enhance the ability to resist changes in the external environment and the ability to resist impact loads
However, it does not involve the proliferation and film formation of aerobic bacteria, and its application to sewage treatment containing ammonia nitrogen and phosphorus pollutants will be limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Load sponge filler in a 100L reactor (biological aerated filter), and inoculate the activated sludge in the secondary sedimentation tank of a sewage treatment plant according to the sludge concentration of 3000mg / L. The activated sludge contains COD, ammonia nitrogen and total Nitrogen and other microorganisms, but also phosphorus-accumulating microorganisms. An industrial sewage was used to enter the water from the upper part of the reactor for film hanging culture. The concentration of ammonia nitrogen in the sewage was 30mg / L, the concentration of total nitrogen was 100mg / L, the concentration of COD was 400mg / L, and the concentration of total phosphorus was 12mg / L. First, the intermittent water feeding operation mode is adopted. Each batch of water is fed for 1 hour, and the water is drained for 1 hour after 6 hours of reaction. When the TN removal rate is greater than 70%, it is changed to continuous water feeding, and the hydraulic retention time is 6 hours.

[002...

Embodiment 2

[0030] Compared with Example 1, this embodiment differs in that: in the first aerobic reaction process, glycine is added at a concentration of 0.01 mg / L added to the treated wastewater; in the first anaerobic reaction process, it is added to the The concentration in the treated wastewater is 0.01mg / L, first add trehalose ester, when the dissolved oxygen drops below 0.1mg / L, add 0.01mg / L betaine.

[0031] After the above-mentioned hanging film cultivation for 17 days, the total nitrogen concentration in the effluent was analyzed for 7 consecutive days. The total nitrogen concentration in the effluent was lower than 15mg / L, the average total nitrogen concentration was 14.4mg / L, and the total phosphorus concentration was lower than 0.5mg / L. The average total phosphorus concentration was 0.45mg / L, and the film-hanging culture in the reactor was successfully completed. Use the reactor after the film hanging to continue to treat the waste water. After 3 months of operation, the aver...

Embodiment 3

[0033] Compared with Example 1, this example differs in that: during the first aerobic reaction process, proline is added at a concentration of 0.1 mg / L added to the treated waste water; during the first anaerobic reaction, proline is added according to The concentration in the treated waste water is 0.1mg / L, first add rhamnosyl ester, when the dissolved oxygen drops below 0.1mg / L, add 0.01mg / L phosphorylcholine.

[0034] After the above film-hanging culture for 16 days, the total nitrogen concentration in the effluent was analyzed for 7 consecutive days. The total nitrogen concentration in the effluent was lower than 15mg / L, the average total nitrogen concentration was 13.6mg / L, and the total phosphorus concentration was lower than 0.5mg / L. The average total phosphorus concentration was 0.33mg / L, and the membrane-hanging culture in the reactor was successfully completed. Use the reactor after the film hanging to continue to treat the waste water. After 3 months of operation, ...

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PUM

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Abstract

The invention discloses a biofilm culturing method of a biofilm reactor with denitrification and dephosphorization functions, which comprises the following steps: inoculating activated sludge with denitrification and dephosphorization functions into the biofilm reactor loaded with biological filler, introducing industrial sewage into the reactor, and carrying out biofilm culturing in an anaerobic and aerobic alternate manner, free amino acids are added in the aerobic reaction process, sugar ester substances are firstly added in the anaerobic reaction process, and quaternary ammonium base is added when dissolved oxygen is reduced to 0.1 mg / L or below. According to the method disclosed by the invention, the growth condition of microorganisms on the filler is good, rapid biofilm formation growth of nitrifying bacteria and denitrifying phosphorus-accumulating bacteria is realized, the starting period is short, a biofilm is not easy to fall off, and the effect that the biofilm reactor stably achieves the deep nitrogen and phosphorus removal effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a membrane-hanging cultivation method in a biofilm reactor with the functions of denitrification and dephosphorization. Background technique [0002] The biofilm method refers to the formation of a layer of biofilm by the microorganisms in the sewage treatment attached or fixed on the surface of the biological filler, and the microorganisms in the biofilm degrade harmful components such as organic matter and nitrogen-containing pollutants. The biofilm method has been widely used in the treatment of domestic sewage and industrial wastewater due to its stable operation, less residual sludge, simple management, strong ability to remove ammonia nitrogen and refractory pollutants, and adaptability to a wide range of water quality changes. According to different operation modes, it can be divided into biological filter, biological turntable, biological contact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/308C02F2203/004C02F2209/08C02F2209/16Y02W10/10
Inventor 高会杰王刚孙丹凤陈明翔
Owner CHINA PETROLEUM & CHEM CORP
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