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Deep treatment method of chemical wastewater

A technology for chemical wastewater and advanced treatment, applied in the field of wastewater treatment and advanced treatment of chemical wastewater, can solve the problems of poor load shock resistance, lack of broad spectrum, high treatment cost, and achieve low usage and broad spectrum applicability. , the effect of low operating cost

Inactive Publication Date: 2015-06-03
王桂霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Many scholars at home and abroad have conducted a lot of research on the advanced treatment methods of chemical wastewater, including coagulation sedimentation, adsorption, chemical oxidation, electrochemical oxidation, photocatalytic oxidation and membrane separation. High cost, complex operation, poor load impact resistance, and lack of broad spectrum. Therefore, it is extremely important to find an economical, environmentally friendly, stable and effective advanced treatment process for chemical wastewater, which is important for the development and environmental protection of various chemical enterprises in my country. is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Comparative test

[0033] The following comparative experiments were carried out on the biochemical effluent of a certain coking wastewater:

[0034] Control group 1: Water effluent after single coagulation precipitation;

[0035] Control group two: effluent after single Fenton oxidation precipitation;

[0036] Control group three, effluent after conventional Fenton oxidation combined with coagulation and precipitation;

[0037] Experimental group: the coagulation precipitation of the present invention combined with Fenton oxidation effluent.

[0038] The wastewater quality, water volume, mixing time and sedimentation time treated by the above four groups of experiments are all the same. The experimental results are shown in Table 1:

[0039] Table 1: Comparative results of four groups of experiments

[0040] Comparison group name

Control group one

Control group two

Control group three

test group

Dosage of commercially available polyiron coagulant (mL)

2

0

2 ...

Embodiment 2

[0046] Example 2: The method of the present invention treats four typical chemical wastewater

[0047] The method of the present invention is used for advanced treatment of the following chemical wastewater: pesticide wastewater, pharmaceutical and chemical wastewater, printing and dyeing wastewater, and petrochemical wastewater. The results are shown in Table 2:

[0048] Table 2: Four typical chemical wastewater treatment results

[0049] Wastewater name

[0050] The results show that when the method of the present invention is used for advanced treatment of four typical chemical wastewaters, the COD of the effluent is below 100 mg / L, and the chromaticity of the effluent is below 100 times, which meets the discharge standard requirements of the chemical wastewater.

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Abstract

The invention discloses a deep treatment method of chemical wastewater, belonging to the field of wastewater treatment. The treatment method comprises the following steps: aerobic biologic reaction, coagulating sedimentation, Fenton oxidization and pH adjustment, final precipitation and drainage. The method is applicable to deep treatment of chemical wastewater, has the advantages of being low in treatment cost, simple to operate, high in the removal rate of pollutants, strong in technology stability, safe and stable for the quality of effluent water, and the like, and is suitable for wide use in the treatment of chemical wastewater.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, relates to wastewater treatment technology, and specifically relates to an advanced treatment method of chemical wastewater. Background technique [0002] At present, chemical wastewater is more commonly treated by the combination process of "pretreatment + anaerobic treatment + aerobic treatment". Because chemical wastewater has high organic content, complex composition, high color, large pH fluctuations, and biological toxic substances, etc. Due to its characteristics, the wastewater after the conventional process still cannot meet the discharge requirements. Therefore, it is necessary to increase the advanced treatment process to further mineralize the organic matter into carbon dioxide and inorganic ions, so as to meet the national emission requirements. [0003] Many scholars at home and abroad have conducted a lot of research on the advanced treatment methods of chemical wastewat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 宋保德
Owner 王桂霞
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