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Benzoylmetronildazole sewage treatment method

A technology for benzoyl metronidazole and wastewater treatment, which is applied in natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of reducing COD and improving the treatment effect

Inactive Publication Date: 2018-01-16
HUBEI HONGYUAN PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biochemical treatment of wastewater is to deal with the pollutants in the wastewater through the metabolism of microorganisms. If the imidazole ring is not completely treated, it will kill the bacteria in the biochemical stage, it is difficult to guarantee the effect of wastewater treatment, and the discharge will pollute the environment.

Method used

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  • Benzoylmetronildazole sewage treatment method
  • Benzoylmetronildazole sewage treatment method
  • Benzoylmetronildazole sewage treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The present embodiment provides a kind of benzoyl metronidazole wastewater treatment method, comprises the following steps:

[0026] (1) Distillation: Pass benzoyl metronidazole wastewater into the wastewater distillation tower for distillation at a pressure of 0.01MPa.G and a temperature of 90°C. The condensed gas is condensed by a partial condenser at the top of the tower, and the condensate enters the condensate for treatment system, the non-condensable gas is discharged to the waste gas treatment system, and the pretreated wastewater is discharged from the waste water distillation tower;

[0027] (2) Electrocatalytic advanced oxidation: the pretreated wastewater after wastewater distillation treatment is introduced into the electrocatalytic advanced oxidation device, and in the electrocatalytic advanced oxidation device, the pretreated wastewater is oxidatively degraded in the electrochemical reaction zone, and the There is a positive electrode on one side of the el...

Embodiment 2

[0031] The present embodiment provides a kind of benzoyl metronidazole wastewater treatment method, comprises the following steps:

[0032] (1) Distillation: Pass benzoyl metronidazole wastewater into the wastewater distillation tower for distillation at a pressure of 0.02MPa.G and a temperature of 95°C. The condensed gas is condensed by a partial condenser at the top of the tower, and the condensate enters the condensate for treatment system, the non-condensable gas is discharged to the waste gas treatment system, and the pretreated wastewater is discharged from the waste water distillation tower;

[0033] (2) Electrocatalytic advanced oxidation: the pretreated wastewater after wastewater distillation treatment is introduced into the electrocatalytic advanced oxidation device, and in the electrocatalytic advanced oxidation device, the pretreated wastewater is oxidatively degraded in the electrochemical reaction zone, and the There is a positive electrode on one side of the el...

Embodiment 3

[0037] The present embodiment provides a kind of benzoyl metronidazole wastewater treatment method, comprises the following steps:

[0038](1) Distillation: Pass benzoyl metronidazole wastewater into the wastewater distillation tower for distillation at a pressure of 0.03MPa.G and a temperature of 105°C. The condensed gas is condensed by a partial condenser at the top of the tower, and the condensate enters the condensate for treatment system, the non-condensable gas is discharged to the waste gas treatment system, and the pretreated wastewater is discharged from the waste water distillation tower;

[0039] (2) Electrocatalytic advanced oxidation: the pretreated wastewater after wastewater distillation treatment is introduced into the electrocatalytic advanced oxidation device, and in the electrocatalytic advanced oxidation device, the pretreated wastewater is oxidatively degraded in the electrochemical reaction zone, and the There is a positive electrode on one side of the el...

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Abstract

The invention discloses a benzoylmetronildazole sewage treatment method. The benzoylmetronildazole sewage treatment method comprises following steps: 1, distillation; 2, advanced electrochemical oxidation, wherein sewage obtained via pre-treatment of sewage distillation treatment is introduced into an advanced electrochemical oxidation device, in the advanced electrochemical oxidation device, thesewage obtained via pre-treatment is subjected to oxidation degradation at an electrochemical reaction zone, one side of the electrochemical reaction zone is provided with a cathode and the other sideis provided with an anode; 3, Electro-Fenton; and 4, biochemical treatment. The benzoylmetronildazole sewage treatment method is capable of realizing qualified treatment of benzoylmetronildazole sewage, and removing almost all imidazole rings; Electro-Fenton and biochemical treatment are carried out; and if the imidazole rings are not treated completely, bacteria at the biochemical period are killed. According to the benzoylmetronildazole sewage treatment method, sewage distillation is adopted, advanced electrochemical oxidation and Electro-Fenton treatment are adopted to reduce COD greatly and remove imidazole rings completely, and combination with biochemistry technology is capable of improving sewage treatment effect greatly.

Description

technical field [0001] The invention relates to the technical field of pharmaceutical and chemical wastewater treatment, in particular to a method for treating benzoylmetronidazole wastewater. Background technique [0002] Benzoyl metronidazole is a kind of medicine that is used for anti-trichomonas and anti-infection, and the existing method for preparing benzoyl metronidazole is to be raw material with metronidazole and benzoyl chloride, with pyridine, or the mixture of pyridine and toluene The mixture, or the mixture of pyridine and acetone is used as a solvent, and benzoyl metronidazole is obtained through esterification. Difficult-to-treat wastewater is produced during the production of benzoylmetronidazole. Benzoyl metronidazole wastewater COD=59750mg / L, Cl-=1722mg / L, pH=7.4. It is very difficult to adjust the pH of this water, requiring a large amount of acid and alkali, which is not suitable for electro-Fenton, but suitable for electrocatalytic advanced oxidation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/34C02F101/38C02F103/34
Inventor 方耀徐双喜喻莎莎陈申丰光俊童武晏浩哲黄佐
Owner HUBEI HONGYUAN PHARMA