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Processing device for cationic dye wastewater and wastewater processing method of processing device

A cationic dye and wastewater treatment technology, which is applied in textile industry wastewater treatment, water/sewage multi-stage treatment, adsorption water/sewage treatment, etc., can solve the problems of difficult treatment and utilization of sediment, water hypoxia, consumption, etc., and achieve good results The value of promotion and application, the addition of less medicine, and the effect of improving the decolorization effect

Inactive Publication Date: 2014-08-06
HOHAI UNIV
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  • Application Information

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Problems solved by technology

Extremely high chromaticity will greatly reduce the transparency of the water body, consume a large amount of oxygen in the water, and cause water hypoxia; it contains heavy metal salts such as chromium, lead, mercury, arsenic, zinc, etc., which cannot be biodegraded and have strong carcinogenic, teratogenic, Mutagenicity; many disperse dyes are bioaccumulative, and the chemical structure of the dye is stable and poorly biodegradable
[0004] According to the research on the existing technology, it is found that as people's demand for the color of textiles is getting higher and higher, there are more and more varieties of dyes, and they are developing in the direction of anti-photolysis, anti-oxidation, and anti-biodegradation, making dyes Wastewater is increasingly difficult to treat with conventional water treatment systems
[0005] For example, although the activated carbon adsorption method has been widely used in the decolorization of dye wastewater, it is very effective in removing dissolved organic matter in water, but it is difficult to regenerate, and it is easy to cause a large loss of activated carbon, resulting in high treatment costs and narrow application areas.
Another example is that although the electrolysis method can effectively treat wastewater by using electrochemical reactions, it does not need to consume a lot of chemicals, but the power consumption and electrode metal consumption are relatively large when processing a large amount of wastewater, and the separated sediment is not easy to process and utilize.
Another example is the biological activated carbon adsorption method, which combines adsorption and biochemical methods. Activated carbon as a fixed medium improves the activity of microorganisms and can improve the treatment effect on dye wastewater. However, once the concentration of microorganisms is too high, the pores of activated carbon will be blocked, resulting in Self-secondary pollution, which greatly reduces the treatment effect, and the separation of activated carbon and wastewater after adsorption and the regeneration of activated carbon are the difficulties in the treatment of dye wastewater by this method

Method used

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  • Processing device for cationic dye wastewater and wastewater processing method of processing device
  • Processing device for cationic dye wastewater and wastewater processing method of processing device
  • Processing device for cationic dye wastewater and wastewater processing method of processing device

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Embodiment 1

[0047] The present invention is described in detail below, but the protection scope of the present invention is not limited to the examples described.

[0048] Utilize the cationic dye wastewater treatment device provided by the present invention to process the dye wastewater taken from a certain dye chemical factory in Tianjin. The wastewater of this factory mainly produces cationic dyes. The specific device is as follows:

[0049] Such as figure 1 As shown, the schematic diagram of the cationic dye wastewater treatment device provided for this implementation includes a primary filter grid 1, an electrolytic cell 2, a sedimentation tank 3 and an activated carbon column 4, wherein the primary filter grid 1 is arranged at the water inlet of the electrolytic cell 2 (Such as image 3 ), the electrolytic cell 2 is connected to the sedimentation tank 3, the water outlet 11 of the electrolytic cell is the water inlet of the sedimentation tank 3, and the water outlet 19 of the sedi...

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Abstract

The invention discloses a processing device for cationic dye wastewater and a wastewater processing method of the processing device. The processing device comprises a primary filter grid, an electrolytic cell, a sedimentation tank and active carbon columns, wherein the primary filter grid is arranged at the water inlet of the electrolytic cell; the electrolytic cell is connected with the sedimentation tank; the water outlet of the electrolytic cell is the water inlet of the sedimentation tank; the water outlets of the sedimentation tank are connected with the active carbon columns. The processing method comprises the following steps: filtering the cationic dye wastewater by the primary filter grid for entering into the electrolytic cell, and regulating the pH to be 4.0; exerting voltage on a negative electrode and a positive electrode of the electrolytic cell for generating iron ions; introducing the reacted wastewater into the sedimentation tank, regulating the pH to be 8.0-9.0, and enabling the wastewater to enter into a water distribution area after sediment; introducing the active carbon columns for filtering decolorization, and discharging or recycling the wastewater when the wastewater reaches the standard. After the cationic dye wastewater is processed by the processing device and the processing method, the BOD removal rate can reach above 87%, and the removal rates of COD, chromaticness, SS and total copper can reach above 90%.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a cationic dye wastewater treatment device and a method for treating wastewater. Background technique [0002] The dye industry is an important industry in the national economy. At present, the output of various dyes in my country has exceeded 900,000 tons, and the output of dyes accounts for about 60% of the world. For every 1t of dyes produced, ≥ 2% of the products will be lost with the waste water, resulting in extreme pollution. Large material and economic losses. Moreover, 90% of the inorganic raw materials and 10% to 30% of the organic raw materials are transferred to the wastewater during the dye production process. This type of wastewater has the characteristics of high pollutant concentration, complex composition, a large amount of organic matter and salt, high CODCr concentration, low biodegradability, deep color, strong acidity and alkalinity, e...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F1/28C02F103/30
Inventor 章梅丽吴云海赵淮阳杨胜鑫阿依妮尕尔·艾尔肯赵秋莹朱亮
Owner HOHAI UNIV
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