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Filler demoulding method of high salinity wastewater treated by moving bed biofilm reactor (MBBR)

A high-salt wastewater and film-removing technology, applied in the field of sewage treatment, can solve the problems of low biofilm activity, poor treatment effect, and no report, and achieve the effect of wide application, convenient operation, and low price

Active Publication Date: 2011-06-15
江苏三强环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biofilms containing dead or aging microorganisms cannot fall off, new active microbial films cannot grow, biofilms cannot be renewed, the activity of biofilms is getting smaller and smaller, and the treatment effect is getting worse
At present, there is no report on the research of packing stripping for the treatment of high-salt wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] When the MBBR process is applied to the advanced treatment of vitamin C production wastewater, the thickness of the biofilm in the filler is up to 1mm. The test proves that the natural shedding rate of the film is less than 5%, and the washing shedding rate of high-pressure water (water pressure 0.3Mpa-0.4Mpa) is less than 5%. . When applying the present invention for biofilm shedding, first soak with dilute hydrochloric acid with a mass percentage of 1%, and the amount (volume) of dilute hydrochloric acid is 1.5 times the bulk volume of the filler. Solution soaking, the dosage (volume) is 1.2 times of the bulk volume of the packing, soaking time is 0.5 hours, and then flushing the packing with high-pressure water. The shedding rate of the filler is 95.4%.

Embodiment 2

[0017] The method of the present invention is applied to the MBBR process treatment of vitamin B12 production waste water. The thickness of the biofilm on the filler reaches 0.9mm. The test proves that the natural shedding rate of the film is less than 2%, and the shedding rate of the high-pressure water washing is less than 6%. When using this method to remove biofilm, first soak with 0.5% dilute hydrochloric acid by mass percentage, the amount (volume) of dilute hydrochloric acid is twice the bulk volume of the filler, after soaking for 10 hours, use 0.5% by mass percentage of hydrogen peroxide dilute solution For soaking, the dosage (volume) is 1.5 of the packing volume, soaking time is 1 hour, and then the packing is washed with high-pressure water, and the falling-off rate of the packing reaches 92.6%.

Embodiment 3

[0019] The method of the present invention is applied to the MBBR process treatment of vitamin B12 production waste water. The thickness of the biofilm on the filler reaches 0.9mm. The test proves that the natural shedding rate of the film is less than 2%, and the shedding rate of the high-pressure water washing is less than 6%. When applying this method to remove biofilm, first soak with 0.6% dilute hydrochloric acid by mass percentage, the amount (volume) of dilute hydrochloric acid is 1.8 times the bulk volume of the packing, after soaking for 8 hours, use 0.3% by mass percentage of hydrogen peroxide dilute solution For soaking, the dosage (volume) is 1.3 times the bulk volume of the packing, soaking time is 0.8 hours, and then the packing is washed with high-pressure water, and the falling-off rate of the packing reaches 92.2%.

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PUM

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Abstract

The invention discloses a filler demoulding method of high salinity wastewater treated by moving bed biofilm reactor (MBBR), belonging to the technical field of wastewater treatment. The method comprises the following steps: taking a filler out of an MBBR biochemical treatment device, airing naturally, then placing the dried filler in an elution container; soaking in dilute hydrochloric acid for 8-10 hours to ensure that the soak solution is completely mixed with the filler, discharging soaking eluent and detached biofilms; then adding dilute hydrogen peroxide solution to soak for 0.5-1 hour, discharging a soaking solution and detached biofilms; and washing the filler with 0.3Mpa-0.4Mpa of water to wash down the biofilms which are loose but not detached from the inner surface of the filler. By adopting the method in the invention, when the high salinity wastewater is treated through the MBBR technology, the technical problem that the biofilms are difficult to detach and replace can be solved, the biofilms are softened, the adhesive force of the biofilms to the filler can be reduced and the biofilms can be removed from the MBBR filler fast and cleanly, thus good conditions can be created for the detachment and replacement of the biofilms and the stable and efficient treatment capability of the reactor.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a filler stripping method for MBBR to treat high-salt wastewater. Background technique [0002] The moving bed biofilm reactor MBBR (Moving Bed Biofilm Reactor) is a new type of sewage treatment process. A certain amount of suspended carrier filler is added to the MBBR. The filler has a certain thickness of biofilm, and there are different types of microorganisms in the film. The MBBR reactor has high microbial diversity, microbial biomass and high treatment efficiency. The inside of the biofilm is an anaerobic environment, and the outside is an aerobic environment. The nitrification reaction and denitrification reaction can exist at the same time, and it has a denitrification effect. When the MBBR process treats non-high-salt wastewater, the biofilm can be naturally shed and renewed under the action of hydraulic force. [0003] When the MBBR process is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 任洪强胡小兵王钊申战辉
Owner 江苏三强环境工程有限公司
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