Electric flocculation method for pretreating high-concentration polluted wastewater of glyphosate

A glyphosate, high-concentration technology, applied in the direction of water pollutants, natural water treatment, water/sewage treatment, etc., to achieve the effect of fast speed, clear and transparent effluent, and high efficiency

Inactive Publication Date: 2016-02-17
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve some of the shortcomings of the existing glyphosate wastewater pretreatment technology, and provides a method of using aluminum plate electrocoagulation technology to quickly pretreat wastewater polluted with high concentration of glyphosate, which is easy to operate, does not need to add chemicals, and has a high processing speed Fast, efficient, simple operation and management, low cost method

Method used

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  • Electric flocculation method for pretreating high-concentration polluted wastewater of glyphosate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 Shown is a schematic diagram of equipment for pretreatment of high-concentration glyphosate wastewater by electrocoagulation technology. The pulse power supply 1 is set above the reaction tank 3, the aluminum plate 2 is vertically placed in the reaction tank 3, the pump 4 is set at the lower end of the reaction tank 3, the mud discharge bucket 5 is set at the bottom of the reaction tank 3, and the bottom of the sedimentation tank 6 is connected to the bottom of the reaction tank 3. The upper end of the reaction tank 3 is connected by a water pipe.

[0032] The pump 4 is set at the lower end of the reaction tank 3, so that the reaction tank 3 adopts the water flow mode of the bottom end and the upper end of the water outlet, the aluminum plate 2 is vertically placed in the reaction tank 3, and the direction of the water flow is opposite to the direction of the floc precipitation produced by the electrolytic reaction. It can increase the contact time betwee...

Embodiment 2

[0040] After filtering the glyphosate wastewater, adjust the pH value to 7.0, and install it in the electrolytic cell with a surface area of ​​176cm 2 Aluminum plates with a spacing of 10mm. Turn on the pump to pass the wastewater into the electrolyzer and start the pulse power supply at the same time, adjust the current density to 8.52mA / cm 2 , start the electrolytic reaction, adjust the flow rate and set the reaction time to 15min. Leave the water to settle for 30 minutes to scrape off the foam on the liquid surface and remove the sludge at the bottom. The supernatant water discharged is the pretreated drainage.

[0041] Processing effect two:

[0042] Using the electrocoagulation pretreatment method of glyphosate high-concentration wastewater of the present invention, another kind of glyphosate high-concentration polluted wastewater is pretreated, and the treatment effect is as shown in Table 2:

[0043] Table 2

[0044]

[0045] As can be seen from Table 2, t...

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Abstract

The invention discloses an electric flocculation method for pretreating high-concentration polluted wastewater of glyphosate. The method comprises the following steps that after the glyphosate wastewater is filtered, suspended solids are removed, the pH value of the wastewater is adjusted to be 7+ / -0.2, a water pump is started to pump the wastewater into an electrolytic bath, the electrolytic bath is electrified, water flow is controlled to adjust time for an electrolytic reaction, after the reaction is completed, output water stands still to be deposited for 0.5-1 h, foam on the liquid level is scraped, and upper clean water discharged after bottom sludge is removed is treated water. According to the method, aluminum plates are used for serving as a negative pole and a positive pole of electric flocculation to treat the glyphosate wastewater, and under the condition of the optimum technology parameters, speed of the pollutant removing effect is higher, efficiency is higher, and cost is lower in comparison with a conventional treatment method; the wastewater COD removing rate reaches 70.3% within a short time, the TP removing rate reaches 75.4%, basically, chromaticity and turbidity can be removed completely, the output water is clear, operation is easy, and automatic management can be achieved.

Description

technical field [0001] The invention belongs to the field of waste water treatment methods, and in particular relates to an electrocoagulation method for pretreating waste water polluted with high concentration of glyphosate. Background technique [0002] Glyphosate is a broad-spectrum, high-efficiency, low-toxicity, non-selective post-emergence herbicide. However, the wastewater produced by the production of glyphosate is a typical organic wastewater with high concentration pollution, high concentration of COD, high toxicity, difficult biodegradation, and containing a large amount of inorganic salts, etc., which is difficult to treat. If it is discharged without treatment, it will pollute surface water and groundwater sources, cause eutrophication of water bodies, etc., and damage the ecological environment. [0003] At present, the commonly used pretreatment methods for polluted wastewater with high concentration of glyphosate include chemical coagulation, hydrolysis, ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/463C02F101/34C02F101/38C02F103/34
Inventor 周少奇伍启文刘聃
Owner SOUTH CHINA UNIV OF TECH
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