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Treatment method for removing lead in electroplating wastewater

A technology of electroplating wastewater and treatment method, which is applied in the fields of metallurgical wastewater treatment, neutralization water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of improving processing capacity, low operation and maintenance cost, and improving reaction efficiency

Active Publication Date: 2016-05-25
JIANGSU XIYI HIGH NEW DISTRICT TECH DEV CO LTD
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Problems solved by technology

[0013] At present, the existing lead-containing electroplating wastewater treatment methods have disadvantages such as high cost, complex technology, large floor area, high energy consumption and low reuse rate.

Method used

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  • Treatment method for removing lead in electroplating wastewater
  • Treatment method for removing lead in electroplating wastewater

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Embodiment Construction

[0026] Such as figure 1As shown in the treatment method for removing lead in electroplating wastewater, the lead-containing electroplating wastewater enters the collection well 1 through the wastewater pipeline, where it is collected and preliminarily stabilized. The outlet of the collection well 1 is connected to the coarse grid 2 through the wastewater pipeline. To remove large-diameter solid matter in the wastewater, the outlet of the coarse grid 2 is connected to the primary sedimentation tank 3 through the wastewater pipeline, where the insoluble matter in the wastewater is further removed, and the outlet of the primary sedimentation tank 3 is connected to the pH adjustment tank 4 through the wastewater pipeline, The pH value of the waste water is precisely adjusted here. The pH value of the effluent from the pH value adjustment pool 4 ranges from 5.5 to 6.5 to meet the pH value requirements of the incoming water of the bio-fermentation-precipitation reaction purification ...

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Abstract

The invention discloses a treatment method for removing lead in electroplating wastewater. The wastewater is sequentially treated by a collecting well, a coarse screen, a primary sedimentation tank, a pH value adjusting tank, a biological fermentation-sedimentation reaction purifying system, an aerobic biofilter, a secondary sedimentation tank and a water purifying tank. In the method, the biological fermentation characteristics of vegetable xanthomonas are utilized creatively; in the presence of D-glucose, a lactonization reaction is performed in the vegetable xanthomonas, and finally L-ascorbic acid (vitamin C) is produced by fermentation; and based on the characteristic that the L-ascorbic acid can be combined with lead ions to generate water-insoluble and nontoxic salt, the lead ions in the electroplating wastewater can be removed in a sedimentation process. Meanwhile, due to the utilization of the L-ascorbic acid produced by adopting D-glucose in the biological fermentation reaction, the cost is far lower than that of directly adding L-ascorbic acid into the wastewater, and the material cost in wastewater treatment can be remarkably reduced.

Description

technical field [0001] The invention relates to a treatment method for removing lead in electroplating wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] With the development of society, a large amount of untreated heavy metal wastewater is directly discharged into natural water bodies, causing great harm. Among them, pollution accidents caused by heavy metal lead are more prominent. In 2010 alone, nine blood lead incidents occurred in China. Both lead ions and soluble lead salts are toxic and can be harmful to human health and plant growth. It can poison people's nervous system and hematopoietic system, causing convulsions, neurasthenia and anemia, etc., especially affecting the development of children. Therefore, the "Drinking Water Sanitation Standard" (GB5749-2006) adjusts the lead ion content to 0.01mg / L, while the "Lead and Zinc Industrial Pollutant Discharge Standard" (GB25466-2010) stipulates th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/16
CPCC02F1/001C02F1/66C02F3/02C02F9/00C02F2001/007C02F2103/16
Inventor 叶澄
Owner JIANGSU XIYI HIGH NEW DISTRICT TECH DEV CO LTD
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