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Pretreatment method of pharmaceutical wastewater with high-concentration chloridion

A chloride ion, high-concentration technology, applied in the field of wastewater treatment and medical wastewater pretreatment, can solve the problems of difficult discharge, poor biodegradability, and long operation time.

Inactive Publication Date: 2015-01-28
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0002] Most of the medical wastewater is high-concentration organic wastewater, and the composition of the wastewater is extremely complex, containing a large amount of organic substances, and the biodegradability is poor, so it is difficult to discharge it after direct biochemical treatment.
Therefore, it is necessary to carry out certain pretreatment on the medical wastewater to improve its biodegradability and create favorable conditions for the subsequent biochemical treatment. For the pretreatment method of medical wastewater, the most commonly used method is to carry out facultative oxygen reaction on the wastewater to make the wastewater biodegradable. However, the method takes a long time to operate, and the biochemical property is not greatly improved, so it is difficult to meet the subsequent biochemical requirements and the requirements for rapid treatment of wastewater.

Method used

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  • Pretreatment method of pharmaceutical wastewater with high-concentration chloridion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Filter the medical wastewater with high concentration of chloride ions and pump it into the electrolytic cell (the electrodes in the electrolytic cell are insoluble electrode plates, which are composed of multiple groups of electrodes, and the anode electrode plates and cathode electrode plates are arranged at intervals of 1cm), and adjust When the pH value of the wastewater reaches 7.5-8.5, direct current with a voltage of 30V and a current intensity of 5A is passed into the electrolytic cell. After the electrolysis reaction is 60mi, the supernatant water discharged is the pretreated drainage, which provides favorable conditions for the subsequent biochemical treatment. condition.

Embodiment 2

[0016] Embodiment two: processing effect

[0017] Using the pretreatment method of medical wastewater with high concentration of chloride ions according to the present invention, a certain medical wastewater is pretreated, and the pretreatment effect is shown in Table-1.

[0018] Table-1 Preprocessing effect

[0019]

[0020] It can be seen from Table-1 that after electrolytic anode indirect oxidation pretreatment, the biodegradability of wastewater is greatly improved, and the chroma removal rate reaches 95.4%, which provides favorable conditions for subsequent biochemical treatment.

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Abstract

The invention relates to a pretreatment method of pharmaceutical wastewater with high-concentration chloridion, and belongs to the field of wastewater treatment method. The method comprises the following steps: filtering the medical wastewater with high-concentration chloridion and pumping into an electrolytic cell; regulating a pH value of the wastewater to 7.5-8.5; powering the electrolytic cell; and performing electrolytic reaction to ensure that the discharged supernate is pretreated discharge water so as to provide favorable condition for subsequent biochemical treatment. According to the pretreatment method of the pharmaceutical wastewater, the pharmaceutical wastewater is subjected to oxidization pretreatment by using an electrolytic anode indirect oxidization method; under the best condition, the electrolysis is carried out for 60 minutes, so that the aims of effectively improving biodegradability and chromaticity removal can be fulfilled, and a favorable condition for subsequent biochemical treatment is provided; the analysis on wastewater components before and after treatment is carried out by means of hue mass spectrometry and shows that the electrolytic anode indirect oxidization method has functions of improving the biodegradability of the pharmaceutical wastewater which is difficult to directly biodegrade and simultaneously removing a part of organics.

Description

technical field [0001] The invention relates to a pretreatment method for medical wastewater with high concentration of chloride ions, belonging to the field of wastewater treatment methods. Background technique [0002] Most of the medical wastewater is high-concentration organic wastewater, and the composition of the wastewater is extremely complex, containing a large amount of organic substances, and its biodegradability is poor, so it is difficult to discharge it after direct biochemical treatment. Therefore, it is necessary to carry out certain pretreatment on the medical wastewater to improve its biodegradability and create favorable conditions for the subsequent biochemical treatment. For the pretreatment method of medical wastewater, the most commonly used method is to carry out facultative oxygen reaction on the wastewater to make the wastewater biodegradable. However, the method takes a long time to operate, and the biochemical property is not greatly improved, so ...

Claims

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Application Information

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IPC IPC(8): C02F1/467
CPCC02F1/4674C02F2101/12C02F2103/026
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION