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Treatment process for discharging metribuzin wastewater in compliance with standard in coordination with salt recycling and running method of treatment process

A treatment process and wastewater treatment technology, which is applied in natural water treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of long residence time, difficult to meet discharge standards, low degradation rate, etc., and achieve resource conservation, Effect of reducing pollution and reducing biological toxicity

Inactive Publication Date: 2019-06-21
江苏南大华兴环保科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In view of the conventional iron-carbon micro-electrolysis, Fenton’s reagent oxidation, coagulation and sedimentation and other pretreatment processes in the prior art, the degradation ability of the wastewater produced by mecitrione is limited, and the adaptability of the biological method to the wastewater is not strong, and the degradation rate is low. The problem of not high, too long residence time, and difficult to reach the standard discharge, the present invention provides a treatment process and its operation method for the discharge of ametrione wastewater to meet the standard and to cooperate with salt resource utilization

Method used

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  • Treatment process for discharging metribuzin wastewater in compliance with standard in coordination with salt recycling and running method of treatment process
  • Treatment process for discharging metribuzin wastewater in compliance with standard in coordination with salt recycling and running method of treatment process
  • Treatment process for discharging metribuzin wastewater in compliance with standard in coordination with salt recycling and running method of treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0046] As shown in Table 1, the water quality of metrizone wastewater produced in the workshop of a pesticide enterprise in Binhai, Jiangsu Province belongs to high-salt, high-COD and refractory biodegradable wastewater.

[0047] The instruments and equipment of wastewater treatment in this embodiment include: advection grit chamber; intermediate pond; resin adsorption-desorption tower; pH neutralization pond; MVR evaporator; pH adjustment pond; Fenton oxidation tower; ; Vertical centrifuge; Single cone vacuum dryer; Distillation tower.

[0048] Table 1 Water quality of azimidone wastewater and park takeover standards

[0049]

[0050] Such as figure 1 As shown, the concrete technological process of the wastewater treatment of the present embodiment is as follows:

[0051] The high-salt, high-COD, and biodegradable azimidone wastewater is passed through the advection grit chamber to remove particulate solid impurities in the wastewater and then flows into the intermediate...

Embodiment 2

[0065] Basically the same as in Example 1, the metrizone wastewater produced in the workshop of a certain pesticide enterprise in Binhai, Jiangsu was also selected as the mezone wastewater in this example, and its water quality indicators are shown in Table 1. The difference is that the process parameters have changed.

[0066] Specifically, the concrete technological process of the wastewater treatment of the present embodiment is as follows:

[0067] High-salt, high-COD, and refractory-biodegradable azimidone wastewater passes through the advection grit chamber to remove particulate solid impurities in the wastewater and then flows into the intermediate pond. Gravity sand discharge is started once every 2 days for sludge discharge; the effluent from the middle pool is pumped into the resin adsorption-desorption tower, wherein the resin particle size filled in the resin adsorption-desorption tower is 0.1mm-0.2mm, and the resin filling volume is 1 / 3 of the effective volume of...

Embodiment 3

[0081] Basically the same as in Example 1, the metrizone wastewater produced in the workshop of a certain pesticide enterprise in Binhai, Jiangsu was also selected as the mezone wastewater in this example, and its water quality indicators are shown in Table 1. The difference is that the process parameters have changed.

[0082] Specifically, the concrete technological process of the wastewater treatment of the present embodiment is as follows:

[0083] High-salt, high-COD, and refractory-biodegradable azimidone wastewater passes through the advection grit chamber to remove particulate solid impurities in the wastewater and then flows into the intermediate pond. The flow rate of the advection grit chamber is controlled at 0.2m / s, and the residence time is 1.5min. Gravity sand discharge is started once a day for sludge discharge; the effluent from the middle pool is pumped into the resin adsorption-desorption tower, wherein the resin particle size filled in the resin adsorption-...

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Abstract

The invention discloses a treatment process for discharging metribuzin wastewater in compliance with standard in coordination with salt recycling and a running method of the treatment process, and belongs to the technical field of pesticide wastewater treatment. The treatment process mainly comprises the steps of precipitation filtration, resin adsorption, pH neutralization, MVR, pH adjustment andFenton advanced oxidation. Salt recycling is conducted by steps as follows: performing evaporation crystallization and centrifugal drying to obtain refined industrial sodium sulfate. The concentration of COD in the metribuzin wastewater can be greatly reduced by resin adsorption treatment, and salt in wastewater can be further removed by MVR. Finally, Fenton advanced oxidation treatment is adopted, and effluent meets the connection standard of the park pipe network. Efficient and stable treatment of the metribuzin wastewater which contains high COD and high salt and is difficult to biologically degrade is realized, so that the metribuzin wastewater is discharged continuously in compliance with standard, and recycling of sodium sulfate in the wastewater is also realized.

Description

technical field [0001] The invention relates to a treatment process and an operation method for the up-to-standard discharge of azimidone wastewater and coordinated salt resource utilization, and belongs to the technical field of pesticide wastewater treatment. Background technique [0002] Azimidone (chemical name 4-amino-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazine-5-tetrahydroketone), also known as Rick Cylazine, methazine, terbuthylazine, and saikezine are selective herbicides, mainly used to control weeds in field crops such as soybeans, potatoes, tomatoes, sugarcane, and corn. The new production process of azimidone technical mainly uses triazinone as an intermediate, and is synthesized through methyl ester synthesis, sulfate synthesis, hydrolysis and alkali hydrolysis, precipitation crystallization and other processes. During the production process of the process, there will be A large amount of high-concentration COD, high-salt and biologically toxic wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D5/16C02F101/10C02F101/30C02F103/36
Inventor 杨峰王俊赵选英周腾腾
Owner 江苏南大华兴环保科技股份公司
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