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A film-hanging method for biofilm process fillers

A film-hanging method and biofilm-based technology, applied in the field of sewage treatment, can solve the problems of slow film-hanging, increased operating investment, slow biochemical reaction, etc., and achieve the effects of easy thickening, reduced operating investment, and flexible exposure time

Active Publication Date: 2018-08-10
中节能国祯环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the low substrate concentration and slow biochemical reactions, film formation is often slow and difficult; (2) For suspended fillers, due to the small size of the filler, it is especially difficult to form a film
[0005] In order to solve such problems, the existing measures are to add additional nutrients to construct a high-concentration substrate environment so that microorganisms can quickly attach and grow on the filler. Although this method can solve the problem of rapid film formation, it needs to add additional nutrients. Nutrients, did not make full use of nutrients from sewage, not only increased operating investment, but also caused a great waste of existing resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of film-hanging method that is used for biofilm process packing, is characterized in that comprising the steps:

[0024] a) Empty water inlet stage: After the reaction tank is emptied, re-inject the organic sewage to be treated until it is full, continue to aerate the injected sewage during the water intake, and put suspended fillers and inoculated microorganisms into the reaction tank. Dehydrated cake; the amount of dehydrated cake is added according to the concentration of the mixed solution after the reaction tank is filled with sewage is 3500mg / L, combined with the moisture content of the mud cake, the specific calculation method is: sludge dosage ( m 3 ) = effective pool capacity of reaction pool (m 3 )×4000 (mg / L)÷1000÷(1-sludge water content (wt%))÷sludge density (kg / m 3 ), maintain the dissolved oxygen concentration of the organic sewage to be treated in the reaction tank at 1.5mg / L;

[0025] b) Suffocating stage: stop the water inflow after the reacti...

Embodiment 2

[0029] A kind of film-hanging method that is used for biofilm process packing, is characterized in that comprising the steps:

[0030] a) Empty water inlet stage: After the reaction tank is emptied, re-inject the organic sewage to be treated until it is full, continue to aerate the injected sewage during the water intake period, and put the dehydrated cake inoculated with microorganisms into the reaction tank ; Among them, the dosage of the dewatered cake is based on the concentration of the mixed solution after the reaction tank is filled with sewage is 4500mg / L, combined with the water content of the mud cake, the specific calculation method is: sludge dosage (m 3 ) = effective pool capacity of reaction pool (m 3 )×4000 (mg / L)÷1000÷(1-sludge water content (wt%))÷sludge density (kg / m 3 ), maintain the dissolved oxygen concentration of the organic sewage to be treated in the reaction tank at 2.5mg / L;

[0031] b) Suffocating stage: stop the water inflow after the reaction tan...

Embodiment 3

[0035] A kind of film-hanging method that is used for biofilm process packing, is characterized in that comprising the steps:

[0036] a) Empty water inlet stage: After the reaction tank is emptied, re-inject the organic sewage to be treated until it is full, continue to aerate the injected sewage during the water intake period, and put the dehydrated cake inoculated with microorganisms into the reaction tank ; Among them, the dosage of the dewatered cake is based on the concentration of the mixed solution after the reaction tank is filled with sewage is 4500mg / L, combined with the water content of the mud cake, the specific calculation method is: sludge dosage (m 3 ) = effective pool capacity of reaction pool (m 3 )×4000 (mg / L)÷1000÷(1-sludge water content (wt%))÷sludge density (kg / m 3 ), maintain the dissolved oxygen concentration of the organic sewage to be treated in the reaction tank at 2.5mg / L;

[0037] b) Suffocating stage: stop the water inflow after the reaction tan...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a biofilm culturing method for biofilm method process filler, especially for organic matter sewage with low concentration. The method includes the emptying and water inlet stage, the stuffy aeration stage and the continuous water inlet stage. A substrate environment with high concentration is created for facilitating biofilm culturing of filler by putting in a dewatered mud cake without putting in additional nutrients, running investment is reduced, and organic matter in to-be-processed sewage is sufficiently used. By repeatedly executing the stages till a biofilm which is 1.5-2.5 mm thick is formed on the filler, the biofilm culturing process is completed. The situation that at present, biofilm culturing is difficult due to low substrate concentration is solved, and meanwhile the method is suitable for suspension filler and other small size situations.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular aims at low-concentration organic sewage, and in particular relates to a film-hanging method for biofilm process fillers. Background technique [0002] The biofilm method is to make microorganisms attach to the surface of the carrier. During the process of sewage flowing through the surface of the carrier, the adsorption of organic nutrients, the diffusion of oxygen into the interior of the biofilm, and the biological oxidation that occurs in the film will remove pollutants. Decomposition takes place, eventually forming various metabolites (CO2, water, etc.). The biofilm method fixes microorganisms to specific fillers in different ways, and is not easy to lose with water. The microbial flora formed is more complex, more diverse, and has higher treatment efficiency and stability. [0003] The biofilm sewage treatment process, like the activated sludge process, is a commonly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/10C02F3/34
CPCC02F3/10C02F3/301C02F3/34C02F2101/30C02F2209/08C02F2209/22C02F2209/44Y02W10/10
Inventor 张静马玉萍孟令鑫侯红勋朱甲华
Owner 中节能国祯环保科技股份有限公司
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