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Method and device for purifying treatment wastewater prior to painting by adopting constructed wetland

A technology of artificial wetland and artificial wetland system, which is applied in the fields of waste water, artificial wetland purification, pre-painting treatment of waste water, and sewage treatment. It can solve the problems of high operating costs, microbial death, and high technical requirements for operators, and achieve construction and operation costs. Inexpensive, improve the effect of nitrogen and phosphorus removal, and the effect of simple treatment process

Inactive Publication Date: 2013-05-22
JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these wastewater and waste liquid are not effectively treated, it will cause serious pollution to the surrounding water environment.
At present, the treatment methods for this kind of wastewater and waste liquid are mainly ① physical treatment method: physical treatment method is used to treat pre-painting wastewater and waste liquid, mainly to remove suspended solids, jelly, grease and other substances, but It is difficult to remove metal ions and soluble salts in wastewater and waste liquid, and often cannot meet the national pollutant discharge standards. Therefore, physical treatment is generally used in the pre-treatment section of waste water and waste liquid treatment. Pretreatment; ②Chemical treatment method: chemical treatment method to treat wastewater and waste liquid before painting, mainly using chemical reactions such as acid-base neutralization, coagulation, redox, ion exchange, etc., so that wastewater and waste water treated before painting The pollutants in the liquid are converted into sludge, concentrated liquid, etc., and then transferred, so that the waste water and waste liquid meet the standards. The chemical treatment method requires a large amount of chemical agents, the actual operating cost is high, and the technical requirements for the operators are high. Due to With the existence of various objective factors, once the chemical treatment method is unstable in actual operation, it will directly lead to the situation that the effluent exceeds the standard. On the premise that the sewage in the sewage section meets certain water quality requirements, the process of increasing the microbial treatment section is to use the metabolic process of the microbial group to oxidize and decompose the complex organic matter in the wastewater into carbon dioxide, methane and water. The biochemical treatment method makes the requirements for the incoming water Very high, once the water quality fluctuates or the acid-base imbalance occurs, it will directly lead to the death of microorganisms, and the discharge water quality will exceed the standard, and the long-term work of cultivating microorganisms will greatly affect the production activities of the enterprise

Method used

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  • Method and device for purifying treatment wastewater prior to painting by adopting constructed wetland
  • Method and device for purifying treatment wastewater prior to painting by adopting constructed wetland

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The characteristic wastewater of the pre-painting treatment is sent into the characteristic buffer pool 1 through the conveying pipeline. When the characteristic wastewater is the characteristic wastewater of the phosphating section, lime solution is added to the characteristic buffer pool 1 to pretreat the characteristic wastewater and adjust the characteristics of the phosphating section. Concentration and characteristics of pollutants in wastewater; the pretreated wastewater is lifted by the anti-corrosion lift pump 2 to the comprehensive adjustment tank 3, and mechanical agitation is used in the comprehensive adjustment tank 3 to fully homogeneously treat the characteristic wastewater to reduce water quality problems. Unstable treatment caused by fluctuations; the wastewater after being homogenized in the comprehensive adjustment tank 3 is lifted by the lift pump 2 to the coagulation reactor 4 with a mechanical mixer 13, and the coagulant is added to the coagulation r...

Embodiment 2

[0033] The characteristic wastewater of the pre-painting treatment is sent into the characteristic buffer pool 1 through the conveying pipeline. When the characteristic wastewater is the characteristic wastewater of the degreasing section, acid solution is added to the characteristic buffer pool 1 to pretreat the characteristic wastewater, and the characteristic wastewater of the phosphating section is adjusted. The concentration and characteristics of pollutants in the water; the pretreated wastewater is lifted by the anti-corrosion lift pump 2 to the comprehensive adjustment tank 3, and the perforated aeration tube is used in the comprehensive adjustment tank 3 to fully treat the characteristic wastewater with uniform quality and quantity. Reduce the instability of treatment caused by water quality fluctuations; the wastewater after being homogenized and equalized by the comprehensive adjustment tank 3 is lifted by the lift pump 2 to the coagulation reactor 4 with a mechanical...

Embodiment 3

[0035] The characteristic wastewater of the pre-painting treatment is sent into the characteristic buffer pool 1 through the conveying pipeline. When the characteristic wastewater is the characteristic wastewater of the phosphating section, lime solution is added to the characteristic buffer pool 1 to pretreat the characteristic wastewater and adjust the characteristics of the phosphating section. Concentration and characteristics of pollutants in the wastewater; the pretreated wastewater is lifted by the anti-corrosion lift pump 2 to the comprehensive adjustment tank 3, and the comprehensive adjustment tank 3 uses perforated aeration tube aeration to fully homogeneously treat the characteristic wastewater , to reduce the unsteady phenomenon of treatment due to water quality fluctuations; the waste water after the comprehensive adjustment tank 3 is homogeneous and equalized is lifted by the lift pump 2 to the coagulation reactor 4 with a mechanical mixer 13, and cast into the co...

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Abstract

The invention discloses a method and a device for purifying treatment wastewater prior to painting by adopting a constructed wetland. The method comprises the following steps of: pre-treating wastewater by adopting treatment medicament; carrying out homogenizing and equalizing treatment; adding coagulant and coagulant aid to sufficiently react with wastewater after the homogenizing and equalizing treatment, so that smaller particles are condensed into large alumen ustum; separating the scum from the wastewater; filtering the separated wastewater through a high-efficiency settling pond, a middle transitional pond, a multi-medium filter and an active carbon filter in sequence and regulating the pH value of the separated wastewater; and inputting the treated wastewater to the constructed wetland system for further treatment, and exhausting after the standards are reached. According to the method and the device disclosed by the invention, the treatment flow is simple, the construction and operation cost is low, the denitrification and phosphorus removal effect is good, the content of the heavy metal ions in the outlet water is not more than 0.1mg / L, the content of solid suspended matters is not more than 30mg / L, the chemical oxygen requirement is not more than 50mg / L, the salinity is low, and the related requirements in Comprehensive Sewage Emission Standards are satisfied.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the treatment of waste water and sewage, and specifically relates to a method and a device for treating waste water before painting by using artificial wetlands to purify and process waste water with simple process flow, reliable operation and stable water output. Background technique [0002] Pre-painting wastewater treatment widely exists in the coating production lines of machinery, household appliances, electronics and other industries. liquid. If these wastewater and waste liquids are not effectively treated, the surrounding water environment will be seriously polluted. At present, the treatment methods for this kind of wastewater and waste liquid are mainly ① physical treatment method: physical treatment method is used to treat pre-painting wastewater and waste liquid, mainly to remove suspended solids, jelly, grease and other substances, but It is difficult to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32
CPCY02W10/10
Inventor 李碧强李爱军蔡军君
Owner JIANGSU NANFANG COATING & ENVIRONMENT PROTECTION EQUIP