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Method and device for electrochemical treatment of medical and chemical wastewater

A technology for wastewater treatment and electrochemistry, applied in chemical instruments and methods, precipitation treatment, multi-stage water treatment, etc., can solve the problems of increased voltage required for electrolytic cells, reduced wastewater treatment efficiency, and refractory benzene degradation, etc., to achieve Improve the effect of wastewater treatment, low cost, and improve the effect of current utilization

Active Publication Date: 2016-10-26
SUZHOU INDAL TECH RES INST OF ZHEJIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If it is directly sent to the secondary electrolytic cell, it will lead to an increase in the voltage required by the electrolytic cell and an increase in energy consumption
[0004] Using a single electrolysis method to treat high-concentration medical and chemical wastewater requires high energy consumption, and the benzene in the wastewater is difficult to be completely degraded, resulting in a decrease in wastewater treatment efficiency

Method used

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  • Method and device for electrochemical treatment of medical and chemical wastewater
  • Method and device for electrochemical treatment of medical and chemical wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0045] See figure 1 Shown: The device for electrochemically treating medical and chemical wastewater is used to treat medical and chemical wastewater. Specifically, the device includes: a primary electrolytic cell 10 , a catalytic reaction sedimentation cell 20 , a secondary electrolytic cell 30 and a catalytic reaction cell 40 .

[0046] The bottom of the primary electrolytic cell 10 is connected to a water inlet pipe 11 for feeding medical waste water, and the upper part of the primary electrolytic cell 10 is provided with a first overflow port 12 . That is, medical waste water enters the primary electrolytic cell 10 from bottom to top through the water inlet pipe 11 , and flows out through the first overflow port 12 after the treatment is completed.

[0047]The catalytic reaction sedimentation tank 20 is divided into a degassing tank 21 and a sedimentation tank 22 by a generally vertical partition 23 . The lower part of the degassing tank 21 is connected to the first over...

Embodiment 2

[0058] The method for electrochemically treating medical and chemical wastewater can be realized by means of the device for electrochemically treating medical and chemical wastewater described in Example 1. Specifically include the following steps:

[0059] (1) The medical waste water is sent to the primary electrolytic cell 10 through the water inlet pipe 11 for oxidation, the conductivity is adjusted to be above 1000 μs / cm by using NaCl, and the current density is 20-100 A / m 2 , the pH value is 4~6, the electrolysis time is 0.5~3h, and the medical and chemical wastewater contains Cl in the electrode plate and electrolysis 2 , ClO - Under the action of the strong oxidant of OH and OH, the macromolecular substances in the wastewater can be decomposed, and the wastewater for primary treatment can be obtained. For example, use NaCl to adjust the conductivity at 1000, 1200 or 1500μs / cm, and the current density at 20, 50, 80 or 100A / m 2 , the pH value is 4, 5 or 6, and the elec...

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Abstract

The invention discloses a method for electrochemical treatment of medical and chemical wastewater. The method comprises the following steps: oxidizing and degassing in a first-stage electrolytic tank so as to form a gas-liquid mixed system, precipitating, further oxidizing in a second-stage electrolytic tank, adsorbing, and the like. The method for electrochemical treatment of medical and chemical wastewater has the advantages of low cost, relatively low energy consumption and good treatment effect. The invention further relates to a device for electrochemical treatment of medical and chemical wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for electrochemically treating medical wastewater. The invention also relates to a device for electrochemically treating medical wastewater. Background technique [0002] The wastewater produced in the production process of the medical and chemical industries has the characteristics of complex composition, high toxicity, high concentration of COD and ammonia nitrogen, and poor biodegradability. It is one of the more difficult industrial wastewater to treat. Medical and chemical wastewater is mainly treated by physical and chemical methods such as coagulation sedimentation, chemical oxidation, and resin adsorption. However, there are generally problems such as large amount of sludge, need to add a large amount of chemicals, and easy to cause secondary pollution. [0003] With the development of related industries such as electrode materials, electrochemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/16C02F101/30
CPCC02F9/00C02F2301/08C02F2101/16C02F2001/007C02F2103/003C02F2101/30C02F1/20C02F1/5245C02F1/4672C02F1/725
Inventor 张海洋沈东升张诗颖冯华军田志国
Owner SUZHOU INDAL TECH RES INST OF ZHEJIANG UNIV
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