Biofilm formation method of suspended filler in high-salt wastewater MBBR (moving bed biofilm reactor) treatment system

A suspended filler, high-salt wastewater technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic process treatment, etc. Long cycle and other problems, to achieve the effect of improving the level of salt tolerance, stable and efficient treatment, and simple steps

Active Publication Date: 2015-12-16
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of the current high-salt biochemical system, such as long film-hanging period, insufficient salt-tolerant ability of biofilm, and low treatment efficiency, and propose a MBBR treatment system directly under a specific high salinity by inoculating salt-adapted microorganisms. The method of hanging film by suspending filler shortens the film-hanging period, and at the same time broadens its salt tolerance to 10%, and can stably and efficiently treat actual high-salt organic wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1, a film-hanging method for suspended fillers in a high-salt wastewater MBBR treatment system, adding salt-suitable microbial bacterial agents into the MBBR reactor, making the suspended fillers in a fluidized state through aeration, and through sludge discharge and sludge reflux Control the microbial biomass and microbial growth environment in the system, so that the film-forming microbial flora dominates and attaches to the surface of the filler, and finally grows a biofilm on the surface of the filler, and the range of salt concentration in the MBBR reactor during the film-hanging process of the suspended filler Consistent with the salinity range of high-salt wastewater, the method is implemented in the following steps:

[0028] (1) According to the actual water quality characteristics of high-salt wastewater, add the salt-suitable microbial agent after preliminary cultivation and domestication into the MBBR reactor, the inoculation concentration is 2g / L, SV ...

Embodiment 2

[0032] Embodiment 2, the film-hanging method of suspended filler in a kind of high-salt wastewater MBBR treatment system described in embodiment 1, described method realizes according to the following steps:

[0033] (1) According to the actual water quality characteristics of high-salt wastewater, add the salt-suitable microbial agent after preliminary cultivation and domestication into the MBBR reactor, the inoculation concentration is 6g / L, SV 30 40%;

[0034] (2) Turn on the aeration to ensure that the suspended filler is just fluidized and in full contact with the salt-suitable microbial agent, and add matrix nutrients and trace elements required by the salt-suitable microorganisms. The aeration runs for 48 hours, and the dissolved oxygen in the system is controlled at 6mg / L. pH9.0, water temperature 45℃;

[0035] (3) After the aeration is over, start to pump self-prepared or actual high-salt wastewater into the MBBR reactor, and the volume load of the influent water is ...

Embodiment 3

[0037] Embodiment 3, the film-hanging method of suspended filler in a kind of high-salt wastewater MBBR treatment system described in embodiment 1, described method realizes according to the following steps:

[0038] (1) According to the actual water quality characteristics of high-salt wastewater, add the salt-suitable microbial agent after preliminary cultivation and domestication into the MBBR reactor, the inoculation concentration is 4g / L, SV 30 25%;

[0039] (2) Turn on the aeration to ensure that the suspended filler is just fluidized and fully in contact with the salt-suitable microbial agent, add matrix nutrients and trace elements required by the salt-suitable microorganisms, run the aeration for 36 hours, and control the dissolved oxygen in the system to 4mg / L. pH7.5, water temperature 25℃;

[0040] (3) After the aeration is over, start to pump self-prepared or actual high-salt wastewater into the MBBR reactor, and the volume load of the influent water is controlled...

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PUM

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Abstract

The invention relates to a biofilm formation method of a suspended filler in a high-salt wastewater MBBR (moving bed biofilm reactor) treatment system. A halophile microbial inoculant is added into the MBBR, aeration is performed to enable the suspended filler to be in the fluidized state, and sludge discharge and sludge return are utilized to control the microbial biomass and microbial growth environment in the system, thereby promoting the biofilm-formation microbial florae to dominate and attach to the filler surface, and finally growing the biofilm on the filler surface. In the suspended filler biofilm formation process, the salt concentration range in the MBBR reactor is kept the same as the salt concentration range of high-salt wastewater. The method can be used for treating high-salt organic wastewater with the salt concentration of 1-10%, thereby widening the application range of the MBBR technique.

Description

Technical field [0001] The invention belongs to the technical field of high-salt wastewater treatment, and specifically relates to a film-hanging method of suspended fillers in a high-salt wastewater MBBR treatment system. In particular, it can directly realize the rapid development of a high-salt organic wastewater MBBR treatment system under specific high-salinity conditions. Hanging film. Background technique [0002] High-salt wastewater is a type of wastewater that is extremely difficult to treat at present. The total amount is huge and has a trend of increasing year by year. The total salt content is ≥1%, sometimes even as high as 15%~30%. It is widely produced in chemical industry, pharmaceutical, It is used in many industrial practices such as tanning, food, oil extraction, seafood processing, and seawater substitution. In addition, wastewater also contains a large amount of toxic, harmful, and refractory organic matter. If it is directly discharged without treatmen...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/08C02F3/34C02F101/30
CPCY02W10/10
Inventor 李坤徐军王开春胡聪崔庆兰王克云袁丽娟李学字
Owner BLUESTAR LEHIGH ENG INST CO LTD
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