Method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry

A technology for industrial wastewater and advanced treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. , to achieve the effect of uniform surface pore structure, high mechanical strength and good product stability

Active Publication Date: 2013-05-08
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has the following problems: ①Heavy metal wastewater is generally acidic, and this method needs to control the pH value of the wastewater above 10. After neutralization and precipitation, the pH value of the wastewater is high, and it needs to be discharged after neutralization with acid; ②In the wastewater When zinc, lead, tin, aluminum and other amphoteric metals coexist, as the pH value of the wastewater increases, the amphoteric metals tend to redissolve, so it is necessary to strictly control the pH value for segmental precipitation; ③ Certain metal ions will interact with the halogens present in ...

Method used

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  • Method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry
  • Method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry
  • Method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry

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Embodiment

[0034] Adopt the method of the present invention to process the waste water of a printed circuit board production enterprise in Guangzhou Economic and Technological Development Zone, its flow process is as follows figure 1 As shown, it specifically includes the following steps:

[0035] (1) Pass the printed circuit board complexed copper wastewater into the iron-carbon micro-electrolysis reactor 2 (its structure is as follows figure 2 As shown, that is, the pilot plant disclosed in "Research on the Treatment of EDTA Complex Copper Wastewater by Internal Electrolysis of Iron Flakes" by He Haopeng, Wu Xiuwen, Zhang Shaomin, etc.), the pH value of the water inlet 12 is controlled at about 2.5, and by controlling the water inlet The flow rate ensures that the HRT of the wastewater in the fluidization zone 14 is about 30 minutes, and then the wastewater passes through the settling zone 15, the static zone 16, crosses the overflow weir 17, enters the return tower 20 from the divers...

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Abstract

The invention discloses a method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry. The method disclosed by the invention integrates the processes of micro-electrolyzing and breaking complex of iron-carbon, collecting via a heavy metal collector, coagulating and precipitating, biologically contacting and oxidizing, secondarily precipitating and absorbing via modified chitosan for detoxifying, reducing emission and deeply treating wastewater of electronic industry. The method disclosed by the invention is characterized in that the emission of secondary treatment (biochemical pool) wastewater is further reduced on the basis that the main indexes reach the national standard and toxic organic matters mainly consisting of benzene series are removed; and meanwhile, the wastewater can be deeply treated, so that the recycled water reaches the membrane-feeding requirement and separates are recycled.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and specifically relates to a method for detoxification, emission reduction and advanced treatment of wastewater in the electronic electroplating industry. Modified chitosan adsorption" integrated technology has realized the advanced treatment of wastewater in the electronic electroplating industry. Background technique [0002] The wastewater in the electronic electroplating industry is mainly printed circuit board wastewater and electroplating wastewater. According to CPCA (China Printed Circuit Industry Association) statistics, in the past few years, China's printed circuit boards have grown at a rate of more than 20% per year, and China's printed circuit output has surpassed Japan to become the world's number one; the electroplating industry has since reformed and opened up Since then, it has entered a period of rapid development with the demand for plates in the electronics industry, esp...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 胡勇有程建华黄思聪
Owner SOUTH CHINA UNIV OF TECH
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