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Automobile coating sewage treatment process

A technology for coating sewage and treatment process, applied in biological water/sewage treatment, flotation water/sewage treatment, neutralized water/sewage treatment, etc. , complex components, etc., to achieve good sewage purification effect, ensure stability, and prevent clogging.

Active Publication Date: 2016-08-24
ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for automobile painting wastewater containing resins, surfactants, heavy metal ions, oil, pigments and other pollutants, especially electrophoresis wastewater and painting wastewater with complex components, high concentration, and poor biodegradability, separation treatment is usually used , coagulation sedimentation, coagulation air flotation, sand filtration and other processes to treat the coating wastewater. However, these methods can only make the sewage meet the discharge standard, but it is difficult to meet the requirements of water resource recycling and reuse. With the reuse of urban reclaimed water At present, there is no suitable treatment process to directly treat the non-vehicle painting sewage to the reuse standard at one time.

Method used

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  • Automobile coating sewage treatment process

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Experimental program
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Effect test

Embodiment 1

[0025] A kind of automobile painting sewage treatment process, comprises the steps:

[0026] S1. Preprocessing:

[0027] Demulsification: add AP demulsifier to the sewage at the input amount of 4.5mg / L, and demulsify the sewage by electro-precipitation method;

[0028] Coagulation: adjust the pH of the sewage to 10.3, make the sewage flow into the reaction tank, and stay in the tank for 14 minutes;

[0029] air flotation;

[0030] S2. Passing through the grid: put flocculant into the grid tank according to the input amount of 1g / L, settle for 1h, pass the sewage first through the grid of 3-5cm, and then through the grid of 0.2-1cm to remove the floc;

[0031] S3. Through the O / A / O composite biological filter: the sewage is passed into the O / A / O composite biological filter with a small lightweight porous carrier, and the organic pollutants and suspended particles in the sewage pass through the carrier. microbial adsorption, retention and degradation;

[0032] S4. Activated ...

Embodiment 2

[0037] A kind of automobile painting sewage treatment process, comprises the steps:

[0038] S1. Preprocessing:

[0039] Demulsification: According to the input amount of 6mg / L, AR type demulsifier is added to the sewage, and the sewage is demulsified by the electrodeposition method;

[0040] Coagulation: adjust the pH of the sewage to 9.4, make the sewage flow into the reaction tank, and stay in the tank for 12 minutes;

[0041] air flotation;

[0042] S2. Passing through the grid: put flocculant into the grid tank according to the input amount of 1.5g / L, settle for 1.5h, pass the sewage first through the grid of 3-5cm, and then through the grid of 0.2-1cm to remove the floc;

[0043] S3. Through the O / A / O composite biological filter: the sewage is passed into the O / A / O composite biological filter with a small lightweight porous carrier, and the organic pollutants and suspended particles in the sewage pass through the carrier. microbial adsorption, retention and degradatio...

Embodiment 3

[0049] A kind of automobile painting sewage treatment process, comprises the steps:

[0050] S1. Preprocessing:

[0051] Demulsification: add AP type demulsifier to the sewage according to the input amount of 6mg / L, and demulsify the sewage by electrodeposition method;

[0052] Coagulation: adjust the pH of the sewage to 9.8, make the sewage flow into the reaction tank, and stay in the tank for 16 minutes;

[0053] air flotation;

[0054] S2. Passing through the grid: put flocculant into the grid tank according to the input amount of 0.5g / L, settle for 2 hours, pass the sewage first through the grid of 3-5cm, and then through the grid of 0.2-1cm to remove the floc;

[0055] S3. Through the O / A / O composite biological filter: the sewage is passed into the O / A / O composite biological filter with a small lightweight porous carrier, and the organic pollutants and suspended particles in the sewage pass through the carrier. microbial adsorption, retention and degradation;

[0056]...

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Abstract

The invention relates to the technical field of automobile sewage treatment, in particular to an automobile coating sewage treatment process. The process comprises pre-treating, undergoing a grid, undergoing an O / A / O composite biological filter, performing an active sludge method, undergoing an artificial wetland tank, filtering by a biological filter, performing disinfection and the like. After the automobile coating sewage treatment process provided by the invention is performed, contents of BOD5, SS, COD, TSS, TN, alga, petroleum, nutrient salt, protozoa, metal ions and other materials are remarkably reduced, and the treated water quality is up to the first-stage drainage standard.

Description

technical field [0001] The invention relates to the technical field of automobile sewage treatment, in particular to an automobile painting sewage treatment process. Background technique [0002] There are many types of wastewater (or waste liquid) discharged from automobile painting lines, mainly including emulsified oil, surfactants, phosphates, and heavy metal ions (such as Zn2+) left by degreasing, phosphating, and surface adjustment processes during surface treatment before painting. , fillers (such as titanium dioxide) and solvents, as well as spraying resins (such as epoxy resin, phenolic resin, etc.), pigments (such as carbon black, iron oxide red, lead mercury, etc.), fillers (such as titanium dioxide, talcum powder, etc.) etc.), co-solvents (such as triethanolamine, butanol, etc.) and a small amount of heavy metal ions. [0003] At present, for automobile painting wastewater containing resins, surfactants, heavy metal ions, oil, pigments and other pollutants, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/24C02F1/52C02F1/66C02F1/78C02F3/1215C02F3/30C02F3/32C02F3/34C02F9/00C02F2301/08C02F2303/04
Inventor 钟华
Owner ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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