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Segmented treatment method of high-concentration high-chromaticity dye wastewater

A dye wastewater and treatment method technology, which is applied in the field of segmented treatment of high-concentration and high-chroma dye wastewater, can solve the problems of refractory degradation, reduced current efficiency, and increased electrochemical energy consumption, achieving high-efficiency energy-saving treatment, excellent Electrochemical oxidation ability, effect of good electrocatalytic oxidation characteristics

Inactive Publication Date: 2011-05-25
TONGJI UNIV
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Problems solved by technology

However, for dye wastewater with high concentration and high chroma, it is difficult to achieve a good degradation effect with a single photocatalytic oxidation
Although electrochemical oxidation alone can achieve the purpose of degradation, due to the decrease in the concentration of pollutants and the increase in the ratio of side reactions in the later stage of the reaction, the current efficiency decreases rapidly and the electrochemical energy consumption increases.

Method used

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  • Segmented treatment method of high-concentration high-chromaticity dye wastewater
  • Segmented treatment method of high-concentration high-chromaticity dye wastewater

Examples

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Effect test

Embodiment 1

[0017] Embodiment 1 is an example with high-concentration methyl orange wastewater.

[0018] Sb doped SnO 2 / Ti electrode is used as the anode electrode 2, the titanium electrode is used as the cathode electrode 1, and the area of ​​the cathode electrode 1 and the anode electrode 2 is 4.5cm 2 , the electrode spacing is 1cm, the current density is 30mA / cm 2 ; 300W UV lamp is used as the UV light source (center wavelength 365nm), and the light intensity is 3mW·cm -2 , the distance between the anode electrode 2 and the light source (placed in the solution after being covered with a quartz tube) is 15.0 cm. The concentration of methyl orange in the simulated wastewater is 500mg / L, the TOC is 237.35mg / L, and the chromaticity is as high as 10 5 times, the light transmittance is almost 0, the concentration of the supporting electrolyte sodium sulfate is 0.1mol / L, and the volume is 100ml. First, put the waste water to be treated in the reaction pool 4, the reaction pool 4 adopts a...

Embodiment 2

[0019] Embodiment 2 is an example with high chroma methylene blue wastewater.

[0020] Sb doped SnO as anode and cathode electrodes, respectively 2 The area of ​​ / Ti electrode and titanium electrode is 4.5cm 2 , the electrode spacing is 1cm, the current density is 30mA / cm 2 ; 300W UV lamp is used as the UV light source (center wavelength 365nm), and the light intensity is 3mW·cm -2 , the distance between the anode electrode and the light source (placed in the solution after being covered with a quartz tube) is 15.0 cm. The concentration of methylene blue in the simulated wastewater is 100mg / L, the TOC is 53.46mg / L, the light transmittance is almost 0, the concentration of the supporting electrolyte sodium sulfate is 0.1mol / L, and the volume is 100ml. First, constant current degradation was carried out for 1.5h, then ultraviolet light was introduced for photoelectric synergistic oxidation for 2.5h, and finally the subsequent degradation was carried out by single photocatalyt...

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Abstract

The invention belongs to the technical field of high-concentration dye wastewater, and particularly relates to a segmented treatment method of high-concentration high-chromaticity dye wastewater. In the invention, electrochemical oxidation technology is optimally combined with photocatalytic oxidation technology to become a new electrochemical pre-oxidation-photoelectric collaborative oxidation-photocatalytic oxidation three-segment sewage treatment process, and an Sb*doped SnO2 / TiO2-NTs / Ti photoelectronic integrated electrode with excellent photoelectric catalytic properties concurrently is selected as anode material for degradation treatment. The process achieves prospective high-efficient treatment effect, saves energy consumption to the maximum extent, embodies the advantage of savingenergy, and provides a brand-new method for the degradation of the high-concentration high-chromaticity dye wastewater, thus having broad application prospect and development potential.

Description

technical field [0001] The invention belongs to the technical field of high-concentration dye wastewater, and in particular relates to a segmented treatment method for high-concentration and high-chroma dye wastewater. Background technique [0002] With the increasing variety and quantity of dyes, dye wastewater has become one of the key pollution sources of the water environment. Dye wastewater has the characteristics of high concentration of organic matter, high chroma, high content of inorganic salts, complex components, poor biodegradability, and difficulty in decolorization. Teratogenic, mutagenic) organic matter has always been a difficult point in industrial sewage treatment, and it is also a major problem that needs to be solved urgently in the field of water pollution control at home and abroad. [0003] Advanced oxidation technology is a popular research technology that is considered to have good development prospects, mainly including wet catalytic oxidation, pho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/32C02F1/46C02F1/72
Inventor 赵国华赵坤娇李培强
Owner TONGJI UNIV
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