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Method for treating clomazone production process wastewater

A treatment method and production process technology are applied in the field of treatment of waste water from clomazone production process, which can solve the problems of high chemical oxygen demand, poor biodegradability, environmental pollution and the like, and achieve simple operation methods, low process energy consumption, The effect of protecting the environment

Inactive Publication Date: 2019-08-16
JIANGSU HEBEN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a treatment method for clomazone production process wastewater, which solves the problem of high chemical oxygen demand, poor biodegradability, complex components, and direct discharge of clomazone production wastewater to pollute the environment. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of treatment method of clomazone production process waste water

[0029] Include the following steps:

[0030] Step 1, using sulfuric acid to adjust the pH of the clomazone production process wastewater to 3.2, adding sodium hydroxide solution after stirring for 0.5 hours to adjust the pH to 4.1, and filtering to obtain pretreated wastewater; wherein, the concentration of sulfuric acid is 1.0mol / L; The concentration of sodium hydroxide solution is 0.4mol / L;

[0031] Step 2, the pretreated wastewater obtained in step 1 is transferred to the electrolytic cell, sodium carbonate is added, and then under magnetic stirring conditions, constant current electrolysis is performed for 120 minutes, and then the 200 mesh screen is used to filter to obtain the initial wastewater; wherein, sodium carbonate and pretreated wastewater The addition ratio of treated wastewater is 1kg: 10L;

[0032] Step 3, adding a mass ratio of 1:0.6 sodium hydroxide and calcium hydroxide compos...

Embodiment 2

[0035] A kind of treatment process of clomazone production process wastewater

[0036] Include the following steps:

[0037] Step 1, using sulfuric acid to adjust the pH of the clomazone production process wastewater to 3.6, stirring for 1 hour, adding sodium hydroxide solution to adjust the pH to 4.3, and filtering to obtain pretreated wastewater; wherein, the concentration of sulfuric acid is 1.5mol / L; The concentration of sodium hydroxide solution is 0.8mol / L;

[0038] Step 2, the pretreated wastewater obtained in step 1 is transferred to the electrolytic cell, sodium carbonate is added, and then under magnetic stirring conditions, constant current electrolysis is performed for 150 minutes, and then filtered with a 300 mesh screen to obtain the initial wastewater; wherein, sodium carbonate and pretreated wastewater are The addition ratio of wastewater treatment is 1kg: 12L;

[0039] Step 3, add a mass ratio of 1:0.8 sodium hydroxide and calcium hydroxide composition to th...

Embodiment 3

[0042] A kind of treatment process of clomazone production process wastewater

[0043] Include the following steps:

[0044] Step 1, using sulfuric acid to adjust the pH of the clomazone production process wastewater to 3.3, stirring for 1 hour, adding sodium hydroxide solution to adjust the pH to 4.15, and filtering to obtain pretreated wastewater; wherein, the concentration of sulfuric acid is 1.1mol / L; The concentration of sodium hydroxide solution is 0.5mol / L;

[0045] Step 2, the pretreated wastewater obtained in step 1 is transferred to the electrolytic cell, sodium carbonate is added, and then under the condition of magnetic stirring, the constant current electrolysis is performed for 130 minutes, and then the 300 mesh screen is used to filter to obtain the primary wastewater; wherein, sodium carbonate is mixed with pretreated wastewater. The addition ratio of wastewater treatment is 1kg: 10.5L;

[0046] Step 3, add a mass ratio of 1:0.8 sodium hydroxide and calcium h...

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Abstract

The invention discloses a method for treating clomazone production process wastewater. The method for treating clomazone production process wastewater comprises the following steps: the wastewater ispretreated to remove acidic insoluble substances, electrocatalytic oxidation is carried out to remove a small amount of clomazone in the wastewater and improve the biodegradability of the remaining clomazone, impurities are removed step by step through using calcium hydroxide, sodium hydroxide, natural zeolite, activated carbon, hydrogen peroxide and hydrogen chloride in order to further improve the water quality, a special water quality improver is added to achieve flocculation and sedimentation again in order to improve the water quality, and the obtained wastewater sequentially goes throughan anaerobic tank, a microbial tank and an aerobic tank, and then is ultrafiltered to obtain dischargeable wastewater that is discharged wastewater with a low chemical oxygen demand and a low organicmatter content.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment for the production of pesticide raw materials, in particular to a method for treating wastewater in the production process of clomazone. Background technique [0002] Clomazone is a selective preemergent herbicide currently used in agricultural production, which inhibits the production of chlorophyll and chlorophyll protective pigments in plants, causing plants to die in a short time. Clomazone mainly controls broad-leaved weeds and gramineous weeds. In addition to soybean fields, it can also be used for weeding in cotton, cassava, corn, rapeseed, sugarcane and tobacco fields. Clomazone has the characteristics of long residue and refractory degradation. The preparation process of clomazone technical will produce a large amount of waste water with complex components and high COD value. Direct discharge is difficult to be directly biodegraded, and it is easy to pollute the environment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
CPCC02F1/001C02F1/283C02F1/444C02F1/461C02F1/5236C02F1/66C02F1/722C02F3/30C02F3/34C02F9/00C02F2103/36
Inventor 陈华邓桂元贾利华曾挺潘光飞
Owner JIANGSU HEBEN BIOCHEM
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