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Electrochemical process for treating waste dye liquid

A technology for dye wastewater and a treatment method, which is applied in the field of electrochemical treatment, can solve the problems of large chromaticity, complex composition and difficult biodegradation of wastewater, and achieves the effects of low energy consumption in the treatment process, simple and easy method, and low equipment investment.

Inactive Publication Date: 2004-03-03
FUJIAN NORMAL UNIV
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Problems solved by technology

[0002] The wastewater treatment of dyestuff and printing and dyeing industry has always been a troublesome subject. This kind of wastewater has large chroma, complex composition, and many components that are difficult to biodegrade. In recent years, many of them are produced by the reaction of hydrogen peroxide and ferrous ions. Hydroxyl radicals (i.e. Fenton's reagent) are used to treat dye wastewater. Because Fenton's reagent has a high oxidation potential (2.8V), it is effective in decolorizing and degrading dyes. However, hydrogen peroxide and sulfurous acid must be added on site. Iron, so the cost is high, it is difficult to apply industrially

Method used

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Examples

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Embodiment 1

[0043] The electrochemical treatment method of dye waste water, comprises the following steps:

[0044] 1. Provide a set of electrolysis equipment including electrolyzer, cathode and anode,

[0045] 1.1 The cathode is a graphite plate,

[0046] 1.2 The anode is a kind of iron plate,

[0047] 2. Add dye waste water and potassium sulfate to form electrolyte in the electrolytic cell, and make the content of potassium sulfate in the electrolyte be 5g / l,

[0048] 3. Power on the electrolyzer for electrolysis,

[0049] 3.1 The anode electrolysis current density is 4mA / cm 2 .

[0050] 3.2 The cathode electrolysis current density is 4mA / cm 2 .

[0051] 4. During electrolysis

[0052] 4.1 Bubble oxygen into the cathode

[0053] 4.2 Stir the electrolyte

[0054] 5. Electrolysis time 1.5 hours,

[0055] wavelength

[0056]Table 1 shows the change of visible light absorption intensity in the visible light wavelength range of 350-700nm after the wastewater from Fuhua Pr...

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Abstract

An electrochemical process for treating dye sewage includes such steps as providing a set of electrolysis equipment composed of electrolyzer, electrolysis equipment with cathode and anode, and anode material containing Fe or Cu; adding the said dye sewage and supporting electrolyte to contain 5-20 g / L, turning on electrolysis equipment to start operation, electrolyzing while introducing air to cathode, filtering the electrolyte and collecting the filter matter.

Description

technical field [0001] The invention relates to an electrochemical treatment method for dye wastewater. Background technique [0002] The wastewater treatment of dyestuff and printing and dyeing industry has always been a troublesome subject. This kind of wastewater has large chroma, complex composition, and many components that are difficult to biodegrade. In recent years, many of them are produced by the reaction of hydrogen peroxide and ferrous ions. Hydroxyl radicals (i.e. Fenton's reagent) are used to treat dye wastewater. Because Fenton's reagent has a high oxidation potential (2.8V), it is effective in decolorizing and degrading dyes. However, hydrogen peroxide and sulfurous acid must be added on site. Iron, so the cost is higher, it is difficult to apply industrially. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an electrochemical treatment method for dye wastewater that is si...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/74
Inventor 陈震陈日耀郑曦
Owner FUJIAN NORMAL UNIV
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