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Comprehensive electroplating wastewater treating agent

A technology for electroplating wastewater and treatment agent, which is applied in the fields of metallurgical wastewater treatment, water/sewage treatment, adsorbed water/sewage treatment, etc. Easy operation and management, the effect of reducing the floor space

Inactive Publication Date: 2014-08-20
浙江一清环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbial method has the advantages of high efficiency, strong selectivity, and large adsorption capacity, but there are currently disadvantages such as low reaction efficiency, large consumption of medium, high treatment costs, residual organisms in the effluent can continue to reproduce, and cannot be directly reused.
[0007] Among the existing electroplating wastewater treatment methods, the chemical method and the physical and chemical method have disadvantages such as complex process, high energy consumption, high cost, high operation cost, and secondary pollution; while the biological method has strong comprehensive treatment capacity and process It has the advantages of simple control and less sludge, but from the perspective of use, there are also disadvantages such as low reaction efficiency of functional bacteria, slow reproduction speed, difficult reuse of treated water, and inability to ensure stable operation of wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A comprehensive treatment agent for electroplating wastewater is composed of 25% sodium sulfite, 35% sodium sulfide, 20% aluminum sulfate, 10% diatomaceous earth and 10% calcium hydroxide in terms of the total mass percentage of the treatment agent.

[0023] The above-mentioned comprehensive electroplating wastewater treatment agent is applied to electroplating wastewater in an electroplating industrial park in Lishui City, Zhejiang Province. Take 1L of comprehensive electroplating wastewater from the plant in a beaker. The raw water indicators of the comprehensive electroplating wastewater are pH 5.6, COD 291.2mg / L, Ni 2+ 127.26mg / L, Cu 2+ 85.4mg / L, Cr 6+ 64.1mg / L, Zn 2+ 12.6mg / L, add 5.0g of the electroplating wastewater treatment agent, stir at 120rpm for 10-30min, let stand for 30min, take the supernatant and filter to measure various indicators. After the action of the treatment agent, the test results of various indicators were pH 8.5, COD 51.3mg / L, Ni 2+ ...

Embodiment 2

[0029] A comprehensive treatment agent for electroplating wastewater is composed of 20% sodium pyrosulfite, 20% calcium sulfide, 30% polyaluminum sulfate, 15% activated carbon and 15% calcium hydroxide, based on the total mass percentage of the treatment agent.

[0030] The above-mentioned comprehensive electroplating wastewater treatment agent is applied to the electroplating wastewater of an electroplating factory in Lin'an City, Zhejiang Province. Take 1L of comprehensive electroplating wastewater from the plant in a beaker. The raw water indicators of the comprehensive electroplating wastewater are pH 4.3, COD 386.9mg / L, Ni 2+ 210.3mg / L, Cu 2+ 24.6mg / L, Cr 6+ 184.3mg / L, Zn 2+82.6mg / L, add 5.0g of the electroplating wastewater treatment agent, stir at 120rpm for 10-30min, let stand for 30min, take the supernatant and filter to measure various indicators. After the action of the treatment agent, the test results of various indicators were pH 8.3, COD 94.2mg / L, Ni 2+ ...

Embodiment 3

[0032] A comprehensive treatment agent for electroplating wastewater is composed of 12% ferrous sulfate, 40% calcium sulfide, 15% polyaluminum chloride, 25% bentonite and 8% sodium hydroxide, based on the total mass percentage of the treatment agent.

[0033] The above-mentioned comprehensive electroplating wastewater treatment agent is applied to the electroplating wastewater of an electroplating factory in Haining City, Zhejiang Province. Take 1L of comprehensive electroplating wastewater from the plant in a beaker. The raw water indicators of the comprehensive electroplating wastewater are pH 6.3, COD 562.4mg / L, Ni 2+ 113.6mg / L, Cu 2+ 148.5mg / L, Cr 6+ 25.6mg / L, Zn 2+ 56.5mg / L, add 5.0g of the electroplating wastewater treatment agent, stir at 120rpm for 10-30min, let stand for 30min, take the supernatant and filter to measure various indicators. After the action of the treatment agent, the test results of various indicators were pH 8.3, COD 106.7mg / L, Ni 2+ 2.4mg / L...

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Abstract

The invention relates to a comprehensive electroplating wastewater treating agent. The comprehensive electroplating wastewater treating agent is composed of the following components in percentage by mass: 10-35% of reducing agent, 20-50% of sulfide, 10-30% of aluminum salt, 10-30% of adsorbing material and 5-15% of alkaline substances. The raw materials of the treating agent provided by the invention are low in cost and easy to obtain, and the treating agent is easy to prepare; through compounding the raw materials, a synergistic effect is exerted, and the treating agent is favorable in broad spectrum, capable of effectively removing heavy metals such as nickel, chromium, copper, zinc and the like, high in removal rate up to more than 96% and relatively good in COD (Chemical Oxygen Demand) removal effect; the comprehensive electroplating wastewater treating agent also has the characteristics of strong electroplating wastewater treating capacity, high heavy metal ion sedimentation speed and efficiency, no secondary pollution after treatment and the like; in addition, the treating agent provided by the invention is convenient to use, simple and feasible in treating process, capable of realizing operation by only using a vessel or pool with an aerating agitation device, reducing the floor area and reducing the investment, and easy to realize operation management.

Description

technical field [0001] The invention belongs to the field of environmental protection and relates to a wastewater treatment agent, in particular to a comprehensive electroplating wastewater treatment agent. Background technique [0002] Comprehensive electroplating wastewater is all kinds of wastewater discharged during the electroplating production process. Comprehensive electroplating wastewater generally contains chrome-plating wastewater, nickel-plating wastewater, copper-plating wastewater, galvanizing wastewater, acid-base wastewater, etc. Its pollutant content is high and its components are diverse. The pollution caused is roughly: chemical poison pollution, organic aerobic Material pollution, inorganic solid suspended solids, acid, alkali, heat, etc., color, foam, oil, etc. [0003] The composition of comprehensive electroplating wastewater is complex, and the treatment technology is also varied. The treatment methods currently used mainly include chemical methods, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/70C02F1/52C02F1/66C02F1/28C02F101/20C02F101/22C02F103/16
Inventor 吴昊陈建军任松杰项海
Owner 浙江一清环保工程有限公司
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