A kind of preparation and its application of enhancing biofilm stability of moving bed biofilm reactor

A technology for stabilizing preparations and biofilms, which is applied in the field of preparations for enhancing the stability of biofilms in moving bed biofilm reactors. The effect of stability

Active Publication Date: 2021-06-01
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that sludge microbial activity is difficult to maintain, the present invention provides a preparation for enhancing the stability of biofilm in MBBR reactor, its preparation method and application

Method used

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  • A kind of preparation and its application of enhancing biofilm stability of moving bed biofilm reactor
  • A kind of preparation and its application of enhancing biofilm stability of moving bed biofilm reactor
  • A kind of preparation and its application of enhancing biofilm stability of moving bed biofilm reactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Reagent preparation process:

[0059] Population stabilizer: 55kg of ammonium sulfate, 30kg of 5,10-methylene-tetrahydrofuran; coating agent: 20kg of chitosan. The above-mentioned ammonium sulfate and coating agent chitosan are weighed according to the mass percentage of each component, then dried, dissolved and mixed; put into a mixer and mixed and stirred evenly, after stirring for more than 30 minutes, sieve with a sieve of more than 200 mesh, and filter out larger particle. The obtained powder was slowly dissolved in 5,10-methylene-tetrahydrofuran.

[0060] (2) Sample loading conditions: the preparation prepared by the present invention enters the reactor in the following feeding manner. The dosing place is the MBBR reactor, and the sampling frequency is once every 5 days. The dosage of the dosing preparation is listed in Table 1.

[0061] (3) Detection index: Observe the COD value of the MBBR reactor influent and effluent. When the COD removal rate is stable...

Embodiment 2

[0063] (1) Reagent preparation process:

[0064] Population stabilizer: 55kg of ammonium sulfate, 30kg of 5,10-methylene-tetrahydrofuran; coating agent: 20kg of chitosan. The above-mentioned ammonium sulfate and coating agent chitosan are weighed according to the mass percentage of each component, then dried, dissolved and mixed; put into a mixer and mixed and stirred evenly, after stirring for more than 30 minutes, sieve with a sieve of more than 200 mesh, and filter out larger particle. The obtained powder was slowly dissolved in 5,10-methylene-tetrahydrofuran.

[0065] (2) Sample loading conditions: the preparation prepared by the present invention enters the reactor in the following feeding manner. The dosing place is the MBBR reactor, and the sampling frequency is once every 7 days. The dosage of the dosing preparation is listed in Table 1.

[0066] (3) Detection index: Observe the COD value of the MBBR reactor influent and effluent. When the COD removal rate is stable...

Embodiment 3

[0068] (1) Reagent preparation process:

[0069] Population stabilizer: 55kg of ammonium sulfate, 30kg of 5,10-methylene-tetrahydrofuran; coating agent: 20kg of chitosan. The above-mentioned ammonium sulfate and coating agent chitosan are weighed according to the mass percentage of each component, then dried, dissolved and mixed; put into a mixer and mixed and stirred evenly, after stirring for more than 30 minutes, sieve with a sieve of more than 200 mesh, and filter out larger particle. The obtained powder was slowly dissolved in 5,10-methylene-tetrahydrofuran.

[0070] (2) Sample loading conditions: the preparation prepared by the present invention enters the reactor in the following feeding manner. The dosing place is the MBBR reactor, and the sampling frequency is once every 10 days. The dosage of the dosing preparation is listed in Table 1.

[0071] (3) Detection index: Observe the COD value of the MBBR reactor influent and effluent. When the COD removal rate is stabl...

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Abstract

The invention discloses a preparation for enhancing biofilm stability in a moving bed biofilm reactor and an application thereof. The preparation is calculated by weight percentage, and the distribution ratio of each component is as follows: population stabilizer 75-90%; coating agent 10-25%; The population stabilizer is at least one of ammonium chloride, ammonium sulfate, potassium cyanide, and 5,10-methylene-tetrahydrofuran. The waste water flows through the anaerobic tank, the anoxic tank and the MBBR reaction tank in sequence, and the biofilm stabilizing agent is added into the MBBR reaction tank. The invention has good environmental protection benefit and economic benefit. Compared with the MBBR reaction tank without strengthening agent, the total amount of membrane is increased and it is more stable and not easy to fall off. Compared with general strengthening agents, the invention can promote the increase of the film-forming speed and the stability of the biofilm after adding the coating agent, which is not only environmentally friendly but also can strengthen the biofilm.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a preparation for enhancing the biofilm stability of a moving bed biofilm reactor (MBBR) and an application thereof. Background technique [0002] Biofilm method is a kind of wastewater aerobic biological treatment technology parallel with activated sludge method. It is a fixed membrane method, which is the artificialization and strengthening of the self-purification process of sewage water. It mainly removes soluble and colloidal substances in wastewater. Organic Pollutants. [0003] The principle of moving bed biofilm reactor (MBBR) is to use the basic principle of biofilm method, make full use of the advantages of activated sludge method, and overcome the shortcomings of traditional activated sludge method and fixed biofilm method. The method increases the biomass in the reactor by adding a certain amount of suspension carrier to the reactor, thereby improving the treatment ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/08
CPCC02F3/08C02F3/34Y02W10/10
Inventor 汪美贞孙锋肖俊炜李悦姚丽华
Owner ZHEJIANG GONGSHANG UNIVERSITY
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