Method for removing dissolved organic matter and heavy metal ions in electroplating waste water

A technology for heavy metal ions and electroplating wastewater, applied in chemical instruments and methods, water pollutants, metallurgical wastewater treatment, etc.

Active Publication Date: 2016-02-03
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main methods of electroplating wastewater treatment: chemical precipitation method, ion exchange method, RO membrane treatment method, electrolysis method, biological method, ultraviolet treatment, evaporation method, etc., generally need to be combined with several methods to meet the national discharge standards, these The method has problems such as complex process, high energy consumption, high cost, large floor area, and difficult operation and management.

Method used

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  • Method for removing dissolved organic matter and heavy metal ions in electroplating waste water
  • Method for removing dissolved organic matter and heavy metal ions in electroplating waste water

Examples

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Effect test

Embodiment 1

[0020] For the treatment of wastewater from an electroplating plant in Guangdong, the treatment process is as follows:

[0021] The electroplating wastewater first enters the pH adjustment tank. The pH of the influent water is 6.5, the length-width ratio of the adjustment tank is 1.5, the residence time is 15min, and the average flow rate is 7m / s. Industrial calcium hydroxide is added to the pH adjustment tank to adjust the electroplating wastewater. According to the adjustment tank Equipped with pH meter and automatic control system, the pH value of the effluent is controlled at 7.7. Then the electroplating wastewater enters the packed tower to remove soluble organic matter and heavy metal ions through the lift pump. The main function of the packed tower is to remove organic pollutants such as soluble organic matter and inorganic pollutants such as various heavy metal ions in the electroplating wastewater. The packed packed tower is a closed cylinder. The height-diameter rat...

Embodiment 2

[0027] For the treatment of wastewater from an electroplating plant in Jiangsu, the treatment process is as follows:

[0028] The electroplating wastewater first enters the pH adjustment tank. The pH of the influent water is 8.7, the length-width ratio of the adjustment tank is 1.4, the residence time is 10min, and the average flow rate is 7m / s. The pH adjustment tank is added with industrial sulfuric acid to adjust the electroplating wastewater. With pH meter and automatic control system, the pH value of the effluent is controlled at 7.9. Then the electroplating wastewater enters the packed tower to remove soluble organic matter and heavy metal ions through the lift pump. The main function of the packed tower is to remove organic pollutants such as soluble organic matter and inorganic pollutants such as various heavy metal ions in the electroplating wastewater. The packed packed tower is a closed cylinder. The height-diameter ratio of the cylinder is 15:1, and the residence ...

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Abstract

The invention discloses a method for removing dissolved organic matter and heavy metal ions in electroplating waste water. The method involves a pH value regulation tank and a filler tower capable of effectively removing dissolved organic matter and heavy metal ions. Modified kieselguhr and activated carbon serve as double-layer filler of the filler tower, and after being adsorbed by the filler, electroplating waste water reaches the national emission standard. The method is an environment-friendly green waste water treatment process which is high in organic matter and metal heavy ion removal rate, low in one-time investment, easy to run and operate and low in production treatment cost.

Description

Technical field [0001] The present invention involves the field of water treatment technology, which specifically involves a method of efficiently remove soluble organic matter and heavy metal ions in electroplating wastewater. Background technique [0002] Electroplating wastewater refers to the wastewater and waste liquid discharged during the production process of electroplating factories or workshops. It is mainly composed of grinding water, waste groove liquid, equipment cooling water, and flushing ground water.The water quality of the electroplating wastewater varies due to the difference in production processes.The most important pollutants in electroplating wastewater are soluble organic pollutants and heavy metal ions, such as chromium, nickel, cadmium, etc. Most heavy metal ions exist in simple cations.The form exists, and the electroplating wastewater generally contains toxic organic additives, such as cyania.Electroplating wastewater is mostly toxic and greater harm. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/28C02F101/30C02F101/20C02F103/16
Inventor 何丹农董亚梅尹桂林童琴吴晓燕金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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