Application of a mbr process in domestic sewage treatment

A domestic sewage and sewage technology, which is applied in biological water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low water flux and reduced sewage treatment efficiency, and achieve a firm combination and high Efficient sewage treatment process, the effect of improving water flux

Active Publication Date: 2021-09-21
ANHUI XINCHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing MBR technology, polymeric organic membrane materials commonly used include polyolefins, polyethylenes, polyacrylonitrile, polysulfones, aromatic polyamides, fluoropolymers, etc. These polymeric biofilms can meet High toughness and high strength are required, but its water flux is low, which reduces the efficiency of sewage treatment

Method used

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  • Application of a mbr process in domestic sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Application of a kind of MBR process in domestic sewage treatment, such as figure 1 As shown, the specific process is as follows:

[0025] In the first step, the sewage flows through the mechanical grille, and the mechanical grille automatically removes large particles of suspended solids and impurities in the sewage;

[0026] In the second step, the sewage treated in the first step flows into the sewage regulating tank, and the water quality and water quantity are adjusted in the regulating tank, and the sewage treated in the regulating tank is lifted to the primary sedimentation tank by the sewage lifting pump;

[0027] In the third step, polyaluminum chloride is added to the primary sedimentation tank, and phosphorus in the sewage is removed through polyaluminum chloride, and the sewage treated in the primary sedimentation tank flows to the anoxic tank by itself, and the organic nitrogen content in domestic sewage is high. During biodegradation, it will appear in th...

Embodiment 2

[0032] The membrane separation equipment in the MBR pool uses a flat membrane, and the filter membrane used in the flat membrane is a modified filter membrane, and the specific preparation process of the modified filter membrane is as follows:

[0033]Step 1: Weigh 980g of maleic anhydride and 5kg of p-toluenesulfonic acid into the reaction kettle, add 620g of ethylene glycol into it at the same time, raise the temperature to 200-220°C for 8-9h under reflux to obtain an unsaturated polyester solution, and then put Cool 1kg of unsaturated polyester solution to 90-95°C, and add 208g of benzoyl peroxide to it, stir and mix evenly, then add 163g of trifluoroethyl acrylate and 231g of 3-allyloxy-2 -Hydroxy-1-propanesulfonic acid sodium salt, stirring vigorously while adding dropwise, after the dropwise addition is complete, raise the temperature to 120-125°C for reflux reaction for 6-8h to obtain the stock solution;

[0034] Step 2: Mix 1 kg of the stock solution prepared in step 1...

Embodiment 3

[0037] The specific preparation process of the modified filter membrane is as follows:

[0038] Step 1: Weigh 980g of maleic anhydride and 5kg of p-toluenesulfonic acid into the reaction kettle, add 620g of ethylene glycol into it at the same time, raise the temperature to 200-220°C for 8-9h under reflux to obtain an unsaturated polyester solution, and then put 1kg of unsaturated polyester solution was cooled to 90-95°C, and 208g of benzoyl peroxide was added thereto, stirred and mixed evenly, and then 163g of trifluoroethyl acrylate was added dropwise to the reaction kettle, stirring vigorously while adding, dropping After the addition is complete, raise the temperature to 120-125°C for reflux reaction for 6-8 hours to obtain the stock solution;

[0039] Step 2: Mix 1 kg of the stock solution prepared in step 1 with 210 g of dipropylene glycol butyl ether and 160 g of dodecanol to obtain a casting solution, and the obtained casting solution is rolled into a film in a mold, an...

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Abstract

The invention discloses the application of an MBR process in domestic sewage treatment. The specific process is as follows: the sewage flows into the sewage regulating tank after being treated by a mechanical grid, and the sewage treated in the regulating pond is lifted to the primary sedimentation tank by a sewage lifting pump. The sewage treated in the primary sedimentation tank flows to the anoxic tank by itself, and the sewage treated in the anoxic tank flows to the MBR tank by itself, and then the sewage treated by the MBR tank is sterilized by the ultraviolet disinfection device to kill the bacteria and then discharged after reaching the standard; MBR Part of the sludge in the pond is discharged into the sludge pond, and part of it flows back into the anoxic pond to provide nitrate for the anoxic section to achieve the purpose of denitrification. The present invention improves the quality of sewage treatment by introducing the MBR technology into the sewage treatment process. At the same time, the modified filter membrane used in the MBR technology has high water flux and antifouling performance, and the water flux will not increase during long-term use. There are too many changes, and long-term effective use can be realized, and the efficiency of sewage treatment will increase.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to the application of an MBR process in domestic sewage treatment. Background technique [0002] MBR is a new type of high-efficiency sewage treatment process that combines high-efficiency membrane separation technology with traditional activated sludge process. It uses submerged membrane modules with a unique structure in the aeration tank. The water is pumped out after being filtered through the filter membrane. It is very different from the traditional sewage treatment method, replacing the secondary sedimentation tank and the tertiary treatment process in the traditional biochemical process. Due to the existence of the membrane, the solid-liquid separation ability of the system is greatly improved, so that the system effluent water quality and volume load are greatly improved, and the effluent can reach the first-level A standard of the "Pollutant Discharge Standard for Urban Sewag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14B01D69/02B01D69/06B01D67/00C02F101/30C02F101/16C02F101/10
CPCB01D67/0093B01D69/02B01D69/06C02F1/001C02F1/32C02F1/5245C02F1/5281C02F1/58C02F3/305C02F9/00C02F2101/105C02F2101/16C02F2101/30C02F2203/006C02F2301/046C02F2303/04C02F2303/06
Inventor 方辉朱安云丁伟王定刘力
Owner ANHUI XINCHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION SCI & TECH
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