Rapid biofilm forming method of biofilm reactor

A technology of biofilm reactor and film-hanging method, which is applied in the field of rapid film-hanging of biofilm reactors, can solve the problems that do not involve total nitrogen treatment effect, long time for denitrification microorganisms to hang film, and need to monitor sludge concentration, etc. To achieve the effects of enhancing biodiversity, good growth conditions, and shortening the film-hanging time

Active Publication Date: 2020-06-30
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 denitrific...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A 50L reactor is loaded with semi-soft packing, and an industrial sewage is used for film-hanging culture. The total nitrogen concentration in the sewage is 300mg / L, the ammonia nitrogen concentration is 5mg / L, the nitrate nitrogen concentration is 290mg / L, COD Cr It is 900mg / L, and B / C is less than 0.2.

[0022] Membrane-hanging cultivation stage under aerobic conditions: First, inoculate the activated sludge in the aerobic aeration tank of a sewage treatment plant according to the sludge concentration of 2500mg / L. The sludge contains microorganisms for removing COD, ammonia nitrogen and total nitrogen. Water is fed from the upper part of the reactor for film-hanging culture. First, intermittent water feeding is used for 2 hours, followed by drainage after 6 hours of reaction. When the COD removal rate is greater than 70%, it is changed to continuous water feeding, and the hydraulic retention time is 6 hours. Glucose was added during the cultivation process, and the CO...

Embodiment 2

[0026] Reactor and membrane-hanging waste water, membrane-hanging cultivation stage and the conditions of each stage are all the same as in Example 1. The difference is that under aerobic conditions, fulvic acid is added at 0.05% of the volume of wastewater treated per hour during the intermittent water intake during the film-hanging culture stage; under anaerobic conditions, sorbitol and fulvic acid are added during the film-hanging culture stage, of which The weight ratio is 2:1, and the total usage is 0.05% of the volume of wastewater treated per hour.

[0027] After 17 days of successfully completing the film-hanging culture in the reactor, the removal rate of total nitrogen in the effluent was greater than 90% for 7 consecutive days. Use the reactor after film hanging to continue to treat the waste water, and the average concentration of total nitrogen in the effluent after 3 months of operation is 15mg / L.

Embodiment 3

[0029] Reactor and membrane-hanging waste water, membrane-hanging cultivation stage and the conditions of each stage are all the same as in Example 1. The difference is that humin was added at 0.05% of the volume of wastewater treated per hour during the intermittent water intake in the film-hanging culture stage under aerobic conditions; trehalose and humin were added in the film-hanging culture stage under anaerobic conditions, of which trehalose and humin The weight ratio is 2:1, and the total usage is 0.05% of the volume of wastewater treated per hour.

[0030] After 17 days of successfully completing the film-hanging culture in the reactor, the removal rate of total nitrogen in the effluent was greater than 90% for 7 consecutive days. Use the reactor after the film hanging to continue to treat the waste water, and the average concentration of total nitrogen in the effluent after 3 months of operation is 14mg / L.

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Abstract

The invention relates to a rapid biofilm forming method of a biofilm reactor. The method comprises the following steps: inoculating aerobic activated sludge into a reactor loading a biological filler,carrying out biofilm forming culture by using industrial sewage under aerobic conditions, and adding an organic carbon source and humus in the culturing process; and when the concentration of the effluent sludge is basically stable and unchanged, inoculating anaerobic activated sludge into the reactor, transferring into an anaerobic condition, carrying out biofilm forming culture, and adding sugar alcohol compounds and humus in the culturing process. According to the method, the anaerobic bacteria can be rapidly proliferated in the reactor, the biofilm forming speed is high, the starting period is short, the biofilm is not prone to falling off, and it is guaranteed that the biofilm reactor stably achieves the deep denitrification effect.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for rapid film formation of a biofilm reactor. 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 oxidation method and biological fluidized bed, etc. Although t...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/30C02F101/16
CPCC02F3/34C02F3/301C02F2203/006C02F2305/06C02F2101/16C02F2209/08C02F2209/16C02F2209/14C02F2209/15Y02W10/10
Inventor 高会杰孙丹凤陈明翔
Owner CHINA PETROLEUM & CHEM CORP
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