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Automobile factory wastewater treatment method and use

A treatment method, the technology of the automobile factory, applied in the direction of waste paint treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of refractory COD, difficult to handle, high toxicity, etc., and achieve the effect of thorough decontamination

Inactive Publication Date: 2017-05-31
湖南中车环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Automotive painting wastewater contains pollutants such as resins, surfactants, heavy metal ions, oil, and pigments, especially phosphating wastewater contains both heavy metal nickel ion risk factors and phosphate ions, which are highly toxic and harmful; painting wastewater, Electrophoresis wastewater contains a high concentration of refractory COD; degreasing wastewater contains lipids, oils, and surfactants, with complex components and difficult treatment

Method used

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  • Automobile factory wastewater treatment method and use
  • Automobile factory wastewater treatment method and use
  • Automobile factory wastewater treatment method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Follow the steps below to treat automotive painting wastewater:

[0038] 1) Phosphating wastewater pretreatment

[0039] The phosphating waste water is homogenized and equalized in the regulating tank, and then lifted to the pH regulating tank of the phosphating nickel-containing waste water, and lime milk and heavy metal scavenger are automatically added to adjust the pH value of the waste water to between 10-11. After fully stirring and reacting, enter the coagulation reaction tank, add coagulant PFC and flocculant polyacrylamide PAM-, after mechanical stirring coagulation, flocculation reaction, flow into the phosphating wastewater inclined plate sedimentation tank, use gravity to separate, and then go up The clear liquid flows into the detection water tank, and after the detection of nickel ions in the water reaches the design standard, it flows into the comprehensive waste water pool;

[0040] If it is detected that the content of nickel ions in the water exceeds ...

Embodiment 2

[0056] Follow the steps below to treat automotive painting wastewater:

[0057] 1) Phosphating wastewater pretreatment

[0058] Homogenization and equalization are carried out in the phosphating wastewater adjustment tank, and then it is lifted to the pH adjustment tank of phosphating nickel-containing wastewater, and lime milk and heavy metal scavenger are automatically added to adjust the pH value of the wastewater to between 10-11. After fully stirring and reacting, enter the coagulation reaction tank, add coagulant PFS and flocculant polyacrylamide PAM+, after mechanical stirring coagulation and flocculation reaction, it flows into the phosphating wastewater inclined plate sedimentation tank, and after gravity separation, the supernatant The liquid flows into the detection water tank, and after the detection of nickel ions in the water reaches the design standard, it flows into the comprehensive waste water pool;

[0059] If it is detected that the content of nickel ions ...

Embodiment 3

[0075] Follow the steps below to treat automotive painting wastewater:

[0076] 1) Phosphating wastewater pretreatment

[0077] Homogenization and equalization are carried out in the phosphating wastewater adjustment tank, and then it is lifted to the pH adjustment tank of phosphating nickel-containing wastewater, and lime milk and heavy metal scavenger are automatically added to adjust the pH value of the wastewater to between 10-11. After fully stirring and reacting, enter the coagulation reaction tank, add coagulant PAC and non-ionic PAM, flow into the phosphating wastewater inclined plate sedimentation tank after mechanical stirring coagulation and flocculation reaction, and use gravity to separate, and the supernatant flows into The water tank is tested, and after the detection of nickel ions in the water reaches the design standard, it flows into the comprehensive waste water pool;

[0078] If it is detected that the content of nickel ions in the water exceeds the stand...

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PUM

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Abstract

The method provides an automobile factory wastewater treatment method. The method comprises 1) classification treatment: classifying wastewater of an automobile plant into phosphating wastewater, paint spraying electrophoresis wastewater and degreasing wastewater, and pretreating the phosphating wastewater and paint spraying electrophoresis wastewater, and 2) comprehensive treatment: mixing the pretreated phosphating wastewater, paint spraying electrophoresis wastewater and degreasing wastewater, adding lime milk to adjust pH to 9-10, adding a coagulant and a flocculant into the mixture, carrying out stirring, taking the supernatant, adding a dilute acid to adjust pH to 8-9, adding the coagulant and flocculant into the mixture, carrying out stirring, carrying out air flotation, adding a dilute acid into the air flotation waste liquid to adjust pH to 6-8, and carrying out biochemical treatment through bacteria. The invention also provides a use of the method in treatment on automotive coating wastewater.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating wastewater from an automobile factory. Background technique [0002] Automotive painting wastewater contains pollutants such as resins, surfactants, heavy metal ions, oil, and pigments, especially phosphating wastewater contains both heavy metal nickel ion risk factors and phosphate ions, which are highly toxic and harmful; painting wastewater, Electrophoresis wastewater contains a high concentration of refractory COD; degreasing wastewater contains lipids, oils, and surfactants, with complex components and difficult treatment. Among them, the removal of nickel ions and the degradation of COD are the key and difficult points for the treatment of automobile spraying wastewater to meet the discharge standards. [0003] From the perspective of saving water resources and protecting the environment, after the spraying wastewater has been treated to meet the f...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/20C02F103/14C02F3/34C02F3/02C02F1/24C02F1/44C02F1/52C02F1/66C02F1/72
CPCC02F1/24C02F1/441C02F1/444C02F1/52C02F1/66C02F1/72C02F1/722C02F3/02C02F3/34C02F9/00C02F2001/007C02F2101/20C02F2103/14C02F2209/08C02F2301/08C02F2305/026Y02W10/10
Inventor 余倍李旭斌曾卓范善武洪银海
Owner 湖南中车环境工程有限公司
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