Homogeneous phase photo-oxidation device capable of degrading aromatic compound waste water continuously and processing method thereof

Abstract

The invention provides a homogeneous phase photo-oxidation device capable of degrading aromatic compound waste water continuously and a processing method thereof. The method comprises the following steps: delivering waste water to be processed into a regulator, mixing the waster water to be processed with a photocatalyst which is added from the upper part of the regulator, and regulating the pH value to 3-4; delivering the mixture into a stirring mixer, and mixing the mixture with H2O2 which is added from the upper part of the stirring mixer; and entering a photoreactor through a constant flow pump after mixing, and carrying out continuous photo Fenton oxidation and degradation to finally obtain qualified clarified water. By the adoption of the processing method provided by the invention, problems of pollution and regeneration of the catalyst cannot be caused, the catalyst and an oxidizer have no secondary pollution, the reaction is carried out at normal temperature and pressure, the occupied area is small, the operation is simple and convenient, the waste water processing capability and processing effect are adjustable and controllable, and the aromatic compound waste water which is difficult to degrade can be processed continuously; and the aromatic compound waste water which is difficult to degrade is processed continuously by adopting the processing method, and the removal rate of a parent aromatic compound is more than 98%.

Description

technical field

[0001] The invention relates to a device and method for homogeneous photooxidative degradation of wastewater, in particular to a homogeneous photooxidative reaction device capable of continuously degrading aromatic compound wastewater and a treatment method thereof. Background technique

[0002] The rapid development of modern industry has brought a large amount of industrial wastewater containing high concentrations of toxic organic pollutants, including a large amount of chemical wastewater containing aromatic compounds such as benzene, phenol, chlorophenol, aniline, benzoquinone, nitrobenzene, anthraquinone, and pharmaceutical Aromatic compound wastewater such as production wastewater, pesticide production wastewater, printing and dyeing wastewater has poor biodegradability, and the efficiency of traditional biological treatment technology is low. Secondary pollution and other issues. How to treat this kind of wastewater economically and effectively has a...

Examples

Embodiment 1

[0030] As shown in 2-4, the photoreactor 4 is an upright elongated open container, the bottom of the left side of the photoreactor 4 is provided with a feed port 4.1, and the upper part of the right side is provided with a discharge port 4.2. The photoreactor 4 is separated by the outer shell 4.3 and the inner groove 4.4 provided therein to form a Shaped reaction pool 4.8. The length of one side of the reaction pool 4.8 is 80 cm, the width of the reaction pool 4.8 is 2.5 cm, and the height is 40 cm. Inner groove 4.4 is hard colorless transparent glass, and shell 4.3 is organic glass. The material of the hard colorless transparent glass is a quartz glass plate, and the thickness of the glass plate is 3.4 mm. The artificial light source lamp tubes 4.6 of 3 55W ultraviolet germicidal lamps are horizontally placed in the inner groove 4.4 through the lamp holder 4.9. The length of the artificial light source lamp tube 4.6 is 70 centimeters, and the distance between the artificia...

Embodiment 2

[0033] Except that the dosage of hydrogen peroxide was reduced to 35% (1000 mg / L) of the theoretical dosage, other experimental conditions were the same as in Example 1. After photooxidative degradation, the COD of the effluent was 702.1mg / L, and the removal rate of COD was 49.1%; the concentration of volatile phenol in the effluent was 0.92mg / L, and the removal rate of volatile phenol was 99.69%; the BOD of the effluent 5 The ratio of / COD increased from 0.28 to 0.52 in the original wastewater, and the biodegradability of the treated effluent was significantly enhanced.

Embodiment 3

[0035] Except that the feed rate of the wastewater to be treated was increased to 180mL / min, other experimental conditions were the same as in Example 1. The COD of the effluent after photooxidative degradation was 139.5mg / L, and the removal rate of COD was 90.1%. The concentration of volatile phenol in the effluent was 0.26mg / L, and the removal rate of volatile phenol was 99.91%.

technical field

[0001] The invention relates to a device and method for homogeneous photooxidative degradation of wastewater, in particular to a homogeneous photooxidative reaction device capable of continuously degrading aromatic compound wastewater and a treatment method thereof. Background technique

[0002] The rapid development of modern industry has brought a large amount of industrial wastewater containing high concentrations of toxic organic pollutants, including a large amount of chemical wastewater containing aromatic compounds such as benzene, phenol, chlorophenol, aniline, benzoquinone, nitrobenzene, anthraquinone, and pharmaceutical Aromatic compound wastewater such as production wastewater, pesticide production wastewater, printing and dyeing wastewater has poor biodegradability, and the efficiency of traditional biological treatment technology is low. Secondary pollution and other issues. How to treat this kind of wastewater economically and effectively has a...

Examples

Embodiment 1

[0030] As shown in 2-4, the photoreactor 4 is an upright elongated open container, the bottom of the left side of the photoreactor 4 is provided with a feed port 4.1, and the upper part of the right side is provided with a discharge port 4.2. The photoreactor 4 is separated by the outer shell 4.3 and the inner groove 4.4 provided therein to form a Shaped reaction pool 4.8. The length of one side of the reaction pool 4.8 is 80 cm, the width of the reaction pool 4.8 is 2.5 cm, and the height is 40 cm. Inner groove 4.4 is hard colorless transparent glass, and shell 4.3 is organic glass. The material of the hard colorless transparent glass is a quartz glass plate, and the thickness of the glass plate is 3.4 mm. The artificial light source lamp tubes 4.6 of 3 55W ultraviolet germicidal lamps are horizontally placed in the inner groove 4.4 through the lamp holder 4.9. The length of the artificial light source lamp tube 4.6 is 70 centimeters, and the distance between the artificia...

Embodiment 2

[0033] Except that the dosage of hydrogen peroxide was reduced to 35% (1000 mg / L) of the theoretical dosage, other experimental conditions were the same as in Example 1. After photooxidative degradation, the COD of the effluent was 702.1mg / L, and the removal rate of COD was 49.1%; the concentration of volatile phenol in the effluent was 0.92mg / L, and the removal rate of volatile phenol was 99.69%; the BOD of the effluent 5 The ratio of / COD increased from 0.28 to 0.52 in the original wastewater, and the biodegradability of the treated effluent was significantly enhanced.

Embodiment 3

[0035] Except that the feed rate of the wastewater to be treated was increased to 180mL / min, other experimental conditions were the same as in Example 1. The COD of the effluent after photooxidative degradation was 139.5mg / L, and the removal rate of COD was 90.1%. The concentration of volatile phenol in the effluent was 0.26mg / L, and the removal rate of volatile phenol was 99.91%.

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