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Automobile manufacturer wastewater treatment method

A wastewater treatment and manufacturing plant technology, applied in flotation water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of waste of resources, limited adsorption capacity of activated carbon, and high treatment costs , to achieve strong impact load resistance, good comprehensive treatment effect, and high microbial concentration

Active Publication Date: 2009-06-17
SHANGHAI YIKE GREEN ENG
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AI Technical Summary

Problems solved by technology

[0004] 1. Most automobile production plants separate the waste liquid and waste water discharged from machining and the waste liquid and waste water discharged from the painting workshop into two waste water stations for treatment, and adopt two sets of treatment processes, resulting in huge investment, many repeated constructions, and low utilization rate of equipment
[0005] 2. Part of the treatment process adopts secondary physical and chemical treatment or biochemical treatment measures in the pretreatment stage. The treatment process is complicated and the treatment cost is high
[0006] 3. Part of the treatment process does not separate the wastewater according to the water quality in the pretreatment stage or in the whole treatment process (using the combined process)
Whether it is chemical coagulation or activated carbon adsorption, the removal efficiency of dissolved organic matter in wastewater is low, and it is easy to cause the effluent COD to fail to meet the standard, and the adsorption capacity of activated carbon is limited, and the regeneration cost is high.
[0009] 6. Although some treatment processes adopt biochemical treatment process after physical and chemical treatment, the biochemical treatment process adopts activated sludge method, which is prone to sludge swelling and other phenomena, resulting in deterioration of effluent quality and difficulty in system recovery
[0010] 7. Most of the treatment processes cannot reuse the effluent after wastewater treatment, resulting in a waste of resources

Method used

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  • Automobile manufacturer wastewater treatment method
  • Automobile manufacturer wastewater treatment method
  • Automobile manufacturer wastewater treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The process flow chart is shown in Figure 1.

[0048] All kinds of waste water and waste liquid generated in the workshop are collected through pipelines and input into the corresponding waste water regulating pool or waste liquid regulating pool, and the air is stirred evenly. Domestic sewage is collected through pipes into the sump well.

[0049] Enter the emulsified waste liquid (COD3 / h. Add PAC and PAM (dosage: PAC 450-800mg / L, PAM 17-26mg / L), and control the pH value of the reaction to 6.0-8.0. The air flotation water is discharged into the buffer pool.

[0050] Phosphating waste liquid 40m 3 (COD4 3- : 425mg / L, SS: 250mg / L, Zn: 35mg / L, Ni: 35mg / L, Mn: 35mg / L, PH: 1.5) Enter the batch reaction tank, start stirring at the same time, add 30% NaOH to adjust the pH to 4.0 ~8.0 range, add CaCl 2 250mg / L, polyiron 200mg / L. Continue to add alkali to adjust the pH to 10.5~11.2, add PAM 1~3mg / L, stir evenly, let it stand for 48 hours, then discharge the mud, and pu...

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Abstract

The invention relates to a method for treating wastewater and discloses a method for treating wastewater in an automobile manufacturing plant. A method of pretreatment, two-stage physicochemical treatment, biochemical treatment and advanced treatment is adopted to treat wastewater. The method for treating wastewater in the automobile manufacturing plant has little investment, small occupied area and low operating cost and has good integrated treatment effect on industrial wastewater and domestic sewage discharged from the automobile manufacturing plant.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a comprehensive treatment method for various wastewater discharged from automobile manufacturing plants. Background technique [0002] The production process of the automobile industry mainly includes machining, forming, welding, surface treatment, painting, assembly and other processes, among which surface treatment and painting are the main processes for discharging wastewater. Wastewater mainly contains surfactants, oils, phosphates, metal salts, organic solvents and other substances discharged from surface treatment and coating processes, as well as high-concentration emulsions discharged from machining. [0003] At present, the treatment methods of automobile industry wastewater mainly include biochemical treatment, physicochemical treatment and membrane separation. Due to the variety of waste water, high concentration of pollutants, and poor biodegradability of some waste w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/469C02F1/24C02F1/52C02F3/08
CPCY02W10/10
Inventor 余志荣孙玉成徐存德袁杰仰礼军
Owner SHANGHAI YIKE GREEN ENG
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