CN111925069A - Nicosulfuron wastewater treatment method - Google Patents
Nicosulfuron wastewater treatment method Download PDFInfo
- Publication number
- CN111925069A CN111925069A CN202010849298.9A CN202010849298A CN111925069A CN 111925069 A CN111925069 A CN 111925069A CN 202010849298 A CN202010849298 A CN 202010849298A CN 111925069 A CN111925069 A CN 111925069A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- nicosulfuron
- dimethylamine
- waste water
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/82—Purification; Separation; Stabilisation; Use of additives
- C07C209/86—Separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to the field of sewage treatment, in particular to a nicosulfuron wastewater treatment method. Comprises the steps of dimethylamine recovery, sodium chloride recovery by evaporation, micro-electrolysis treatment, biochemical treatment and the like. The method can recover dimethylamine in the wastewater, the recovery rate of the dimethylamine is 95-98%, the concentration of the recovered dimethylamine reaches 30-50%, and the recovered dimethylamine can be used as a raw material to be reused in chemical synthesis. And the zero emission treatment of the mother liquor generated by evaporation is realized, no secondary pollution is generated in the treatment process, the method has higher environmental protection benefit, the process flow is simple, the operation is convenient, and the method is suitable for industrial application.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a nicosulfuron wastewater treatment method.
Background
The high-salt organic pesticide wastewater has the characteristics of high yield, high concentration, high salt content, high toxicity, high treatment cost, slow aging and the like, and is a great problem which puzzles the combined treatment of economic and environmental benefits of enterprises. In addition, such wastewater cannot be directly biochemically treated, and conventional single treatment techniques also face a number of problems.
Nicosulfuron is a high-efficiency herbicide for corn fields, dimethylamine is used as a reaction raw material in the production of nicosulfuron, the proportion of dimethylamine materials in the reaction is generally excessive by 1-2 times, after the reaction is finished, the excessive dimethylamine and hydrochloric acid form dimethylamine hydrochloride, and after the dimethylamine hydrochloride-containing wastewater is extracted by an organic solvent, the wastewater containing the dimethylamine hydrochloride is produced. Because dimethylamine has a wide range of applications, the recovery of dimethylamine from dimethylamine hydrochloride wastewater is an important means.
The high-concentration salt-containing wastewater can be treated by a physical chemical method, a biological method, a chemical oxidation method and the like. The physical and chemical methods comprise an adsorption method, an extraction method, a liquid membrane separation technology, a distillation method and the like, the biochemical methods comprise an activated sludge method, a biological contact oxidation method, a biofilm method and the like, and although a large number of experimental researches find various treatment methods of the nicosulfuron high-concentration salt-containing wastewater, the ideal treatment effect cannot be achieved. For example, chinese patent publication No. CN 104402734B discloses "a method for recovering dimethylamine from nicosulfuron wastewater", which comprises mixing nicosulfuron wastewater containing dimethylamine hydrochloride with an aqueous solution of sodium hydroxide, reacting sufficiently, heating to distill out dimethylamine, and washing with water for several times to adsorb to obtain a recovered aqueous solution of dimethylamine. Although this technical scheme has carried out better recovery to dimethylamine in the waste water, the sodium hydroxide that remains in the waste water does not obtain better processing, and the full salt content of water is high, and its biodegradability is lower, and waste water still is difficult to handle after the dimethylamine is retrieved, causes the pressure to the environment.
Disclosure of Invention
Aiming at the treatment problem of the nicosulfuron waste water and the defects of the prior art, the invention provides the nicosulfuron waste water treatment method, which is used for recovering dimethylamine and sodium chloride and simultaneously carrying out micro-electrolysis treatment on the waste water under specific conditions on the basis of the prior art, so that the biodegradability of the final waste water is greatly improved, the treatment difficulty of a subsequent biochemical system is reduced, and the final treatment is qualified.
The technical scheme adopted by the invention is a nicosulfuron wastewater treatment method, which comprises the following steps:
1) recovering dimethylamine: adding liquid alkali for reaction, and distilling to recover dimethylamine;
specifically, the method comprises the following steps: adjusting the pH value of the wastewater to 11-14 by using liquid caustic soda, heating to 70-90 ℃, distilling off dimethylamine gas, absorbing by using a three-stage industrial water reducing membrane, and reducing the pH value of the wastewater to 9-11 after recovering dimethylamine; the recovered dimethylamine can be used for pesticide synthesis.
2) And (3) evaporating and recovering sodium chloride: adjusting the pH of the wastewater obtained in the step 1) to 5-6 by using hydrochloric acid, heating and evaporating, concentrating raw water to 30% -50%, evaporating water, condensing and collecting, centrifuging the evaporated concentrated solution, and recovering white solid sodium chloride.
Preferably, the mass concentration of the hydrochloric acid is 30%, and an MVR evaporator is adopted for evaporation; the pressure is controlled to be-0.09 Mpa and the temperature is controlled to be 90 ℃ in the heating and evaporation process.
3) Micro-electrolysis treatment: filling iron-carbon particle fillers into an aeration device, adjusting the pH value of the wastewater after sodium chloride recovery in the step 2) to 3-5 by using hydrochloric acid, mixing the wastewater with the fillers, adding activated carbon for adsorption after reaction under the aeration condition, performing suction filtration, adjusting the pH value of filtrate to 7 by using liquid alkali, adding anionic polyacrylamide for flocculation, and filtering.
Little turbidity exists in effluent after micro-electrolysis, and the effluent is removed by adsorption of activated carbon which also has a certain decolorizing effect; during micro-electrolysis, iron ions are dissolved in water, the ferric ions are changed into ferric hydroxide colloid after the pH value is adjusted, a certain flocculation effect is achieved, polyacrylamide is added to help ferric hydroxide colloid to be better precipitated and removed, and solid waste after filtration is professionally treated.
Preferably, after the wastewater is mixed with the filler, the aeration reaction is carried out for 5 to 7 hours under the condition of the gas-water ratio of 3 to 5: 1.
Preferably, the diameter of the iron-carbon particle filler is about 3cm, and the iron-carbon ratio of the iron-carbon particle filler is 4-8:1, more preferably 7: 1; the amount of the iron-carbon particle filler is 1/5-1/3 of the volume of the wastewater, and more preferably 1/4.
Preferably, the adding amount of the activated carbon is 0.5-2wt% of the wastewater, more preferably 1wt%, and the activated carbon is adsorbed for 1 h.
Preferably, the mass concentration of the liquid caustic soda used in the invention is 30%; the hydrochloric acid mass concentration is preferably 30%.
Preferably, the mass concentration of the anionic polyacrylamide is 0.1%.
Preferably, the anionic polyacrylamide is used in an amount of 0.5wt% of the wastewater, and more preferably, after flocculation for 0.5h, filtration.
4) Biochemical treatment: mixing the distilled water in the step 2) and the wastewater after the micro-electrolysis treatment in the step 3) or respectively entering a biochemical system for treatment.
Preferably, the distilled water in the step 2) and the wastewater after micro-electrolysis treatment in the step 3) are mixed according to the volume ratio of 5-7: 1.
Compared with the prior art, the invention has the beneficial effects that:
the dimethylamine in the sewage is recovered by adding liquid caustic soda, and the obtained dimethylamine product has the yield of more than 95 percent and the content of more than 45 percent and can be used as a raw material for synthesizing and producing pesticides; and then adding hydrochloric acid and evaporating to generate sodium chloride to treat sodium hydroxide, most importantly, treating the mother liquor generated by evaporation and concentration by an iron-carbon micro-electrolysis technology, converting macromolecular organic matters in the mother liquor into micromolecules, improving the biodegradability of the mother liquor, and generating no wastewater or waste residues after biochemical treatment. The method realizes the recycling of dimethylamine in the sewage, has no secondary pollution, stable effluent index, no inhibition to biochemistry, realizes harmless and resource treatment on the nicosulfuron waste water, has higher environmental protection benefit, simple process flow and convenient operation, and is suitable for industrial application.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but it should not be construed that the scope of the above subject matter is limited to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention. Except as otherwise noted, the following examples were carried out using conventional techniques.
Example 1
The method for treating the nicosulfuron wastewater of a certain pesticide plant comprises the following steps:
step 1, recovering dimethylamine: adjusting the pH value of raw water to 11 by using liquid alkali with the mass concentration of 30%, heating to 70 ℃, generating a large amount of dimethylamine gas by a distillation system, absorbing by a three-stage industrial water falling film, recovering dimethylamine for synthesizing pesticides, and reducing the pH value of the wastewater to 9 after recovering the dimethylamine.
Step 2, MVR evaporation recycling of sodium chloride: adjusting the pH value of the dimethylamine wastewater recovered in the step 1 to 6 by using 30 mass percent recovered hydrochloric acid, then feeding the dimethylamine wastewater into an MVR evaporator, controlling the distillation negative pressure to be 0.09Mpa and the distillation temperature to be 90 ℃, heating and evaporating the raw water, concentrating the raw water to 40 percent, condensing the evaporated water by a condenser, collecting the condensed water for later use, discharging the evaporated concentrated solution into a centrifuge, and centrifugally recovering white solid sodium chloride as a resource product.
Step 3, micro-electrolysis treatment of centrifugal mother liquor: filling an iron-carbon granular filler (the iron-carbon ratio is 5:1) with the diameter of 3cm after soaking and washing into an aeration device, adjusting the pH value of the centrifugal mother liquor generated in the step 2 to be 5 by using 30% recovered hydrochloric acid, mixing the centrifugal mother liquor with the filler, wherein the volume of the mother liquor is 3 times of the volume of the filler, and reacting for 5 hours under the aeration condition of the air-water ratio of 3: 1; and (3) after the electrolysis, the water turns turbid, 1% of activated carbon is added for adsorption for one hour, the filtration is carried out, the pH of the filtrate is adjusted to 7 by using liquid alkali with the mass concentration of 30%, 0.5% of anionic polyacrylamide (with the mass concentration of 0.1%) is added for flocculation for 0.5 hour, and then the filtration is carried out.
And 4, effluent biochemical treatment: and (3) carrying out the distilled water in the step (2) and the micro-electrolysis treatment in the step (3) and then centrifuging the mother liquor according to the ratio of 7:1, entering a biochemical system, and discharging after the treatment is qualified.
The index values before and after the nicosulfuron waste water treatment in the embodiment are as follows:
example 2
The method for treating the nicosulfuron wastewater of a certain pesticide plant comprises the following steps:
step 1, recovering dimethylamine: adjusting the pH value of raw water to 14 by using liquid alkali with the mass concentration of 30%, heating to 90 ℃, generating a large amount of dimethylamine gas by a distillation system, absorbing by a three-stage industrial water falling film, recovering dimethylamine for synthesizing pesticides, and reducing the pH value of the wastewater to 11 after recovering the dimethylamine.
Step 2, MVR evaporation recycling of sodium chloride: adjusting the pH value of the dimethylamine wastewater recovered in the step 1 to 6 by using 30% mass concentration recovered hydrochloric acid, then feeding the dimethylamine wastewater into an MVR evaporator, controlling the distillation negative pressure to be 0.09Mpa and the distillation temperature to be 90 ℃, heating and evaporating, concentrating raw water to 60%, condensing distilled water by a condenser, collecting the condensed water for later use, discharging the evaporated concentrated solution into a centrifuge, and centrifugally recovering white solid sodium chloride as a resource product.
Step 3, micro-electrolysis treatment of centrifugal mother liquor: filling the iron-carbon granular filler (the iron-carbon ratio is 7:1) with the diameter of 3cm after soaking and washing into an aeration device, adjusting the pH value of the centrifugal mother liquor generated in the step 2 to be 5 by using 30% recovered hydrochloric acid, mixing the centrifugal mother liquor with the filler, wherein the volume of the mother liquor is 4 times of the volume of the filler, and reacting for 5 hours under the aeration condition of a gas-water ratio of 4: 1; and (3) after the electrolysis, the water turns turbid, 1% of activated carbon is added for adsorption for one hour, the filtration is carried out, the pH of the filtrate is adjusted to 7 by using liquid alkali with the mass concentration of 30%, 0.5% of anionic polyacrylamide (with the mass concentration of 0.1%) is added for flocculation for 0.5 hour, and then the filtration is carried out.
And 4, effluent biochemical treatment: and (3) carrying out the distilled water in the step (2) and the micro-electrolysis treatment in the step (3) and then centrifuging the mother liquor according to the ratio of 5:1, entering a biochemical system, and discharging after the treatment is qualified.
The index values before and after the nicosulfuron waste water treatment in the embodiment are as follows:
example 3
The method for treating the nicosulfuron wastewater of a certain pesticide plant comprises the following steps:
step 1, recovering dimethylamine: adjusting the pH value of raw water to 12 by using liquid alkali with the mass concentration of 30%, heating to 80 ℃, generating a large amount of dimethylamine gas by a distillation system, absorbing by a three-stage industrial water falling film, recovering dimethylamine for synthesizing pesticides, and reducing the pH value of the wastewater to 10 after recovering the dimethylamine.
Step 2, MVR evaporation recycling of sodium chloride: adjusting the pH value of the dimethylamine wastewater recovered in the step 1 to 6 by using 30 mass percent recovered hydrochloric acid, then feeding the dimethylamine wastewater into an MVR evaporator, controlling the distillation negative pressure to be 0.09Mpa and the distillation temperature to be 90 ℃, heating and evaporating, concentrating raw water to 50 percent, condensing evaporated water by a condenser, collecting the condensed water for later use, discharging the evaporated concentrated solution into a centrifuge, and centrifugally recovering white solid sodium chloride as a resource product.
Step 3, micro-electrolysis treatment of centrifugal mother liquor: filling the iron-carbon granular filler (the iron-carbon ratio is 8:1) with the diameter of 3cm after soaking and washing into an aeration device, adjusting the pH value of the centrifugal mother liquor generated in the step 2 to be 4 by using 30% recovered hydrochloric acid, mixing with the filler, adding the mother liquor with the volume 5 times that of the filler, and reacting for 6 hours under the aeration condition of the air-water ratio of 4: 1; and (3) after the electrolysis, the water turns turbid, 1% of activated carbon is added for adsorption for one hour, the filtration is carried out, the pH of the filtrate is adjusted to 7 by using liquid alkali with the mass concentration of 30%, 0.5% of anionic polyacrylamide (with the mass concentration of 0.1%) is added for flocculation for 0.5 hour, and then the filtration is carried out.
And 4, effluent biochemical treatment: and (3) carrying out the distilled water in the step (2) and the micro-electrolysis treatment in the step (3) and then centrifuging the mother liquor according to the ratio of 6: 1, entering a biochemical system, and discharging after the treatment is qualified.
The index values before and after the nicosulfuron waste water treatment in the embodiment are as follows:
comparative example 1
The method of CN 104402734B in the background art is adopted to carry out a comparative experiment, the treated nicosulfuron waste water is the same as that in example 2, and the treatment process comprises the following steps:
step 1, recovering dimethylamine: adjusting the pH value of raw water to 12 by using liquid alkali with the mass concentration of 30%, rapidly heating to 60 ℃, then heating to 80 ℃ at the speed of 10 ℃ per 0.5h, carrying out heat preservation reaction for 1h, generating a large amount of dimethylamine gas in a distillation system, absorbing by three-stage industrial water, recovering dimethylamine for pesticide synthesis, and reducing the pH value of wastewater to 10 after recovering the dimethylamine.
The index values before and after the nicosulfuron wastewater treatment are as follows:
according to the embodiment and the comparative example, the method disclosed by the invention can improve the recovery rate of dimethylamine, reduce the content of full salt and ammonia nitrogen in wastewater, improve the biodegradability of effluent, realize harmless and recycling treatment of nicosulfuron wastewater, have higher environmental protection benefits, have simple process flow and are convenient to operate, and are suitable for industrial application.
Claims (10)
1. A nicosulfuron waste water treatment method comprises 1) dimethylamine recovery, and is characterized by further comprising the following steps: 2) evaporating and recovering sodium chloride; 3) micro-electrolysis treatment; wherein, the micro-electrolysis treatment in the step 3) specifically comprises the following steps: filling iron-carbon granular fillers into an aeration device, adjusting the pH of the wastewater after sodium chloride recovery in the step 2) to 3-5 by hydrochloric acid, mixing the wastewater with the iron-carbon granular fillers, adding activated carbon for adsorption after reaction under the aeration condition, performing suction filtration, adjusting the pH of filtrate to 7 by using liquid alkali, adding anionic polyacrylamide for flocculation, and filtering.
2. The nicosulfuron waste water treatment method according to claim 1, wherein in 3) the microelectrolysis treatment: the iron-carbon ratio of the iron-carbon particle filler is 5-9: 1; the dosage of the iron-carbon particle filler is 1/5-1/3 of the volume of the wastewater.
3. The nicosulfuron waste water treatment method according to claim 1 or 2, characterized by 3) microelectrolysis treatment in which: the iron-carbon ratio of the iron-carbon particle filler is 7: 1; the using amount of the iron-carbon particle filler is 1/4 of the volume of the wastewater, and the diameter of the iron-carbon particle filler is 3 cm.
4. The nicosulfuron waste water treatment method according to claim 1, wherein in 3) the microelectrolysis treatment: aerating and reacting for 5-7 hours under the condition that the volume ratio of gas to water is 3-5: 1.
5. The nicosulfuron waste water treatment method according to claim 1, wherein the amount of the added activated carbon is 0.5-2wt% of the waste water; the dosage of the anionic polyacrylamide is 0.3-1wt% of the wastewater.
6. The nicosulfuron waste water treatment method according to claim 5, wherein the amount of the added activated carbon is 1wt% of the waste water; the dosage of the anionic polyacrylamide is 0.5wt% of the wastewater.
7. The nicosulfuron waste water treatment method as claimed in claim 1, wherein the activated carbon is used for adsorption for 1 hour, and the anionic polyacrylamide is used for flocculation for 0.5 hour.
8. The nicosulfuron waste water treatment method according to claim 1,
1) recovering dimethylamine: adjusting the pH value of the wastewater to 11-14 by using liquid caustic soda, heating to 70-90 ℃, distilling off dimethylamine gas, absorbing by using a three-stage industrial water reducing membrane, and reducing the pH value of the wastewater to 9-11 after recovering dimethylamine;
2) and (3) evaporating and recovering sodium chloride: adjusting the pH of the wastewater obtained in the step 1) to 5-6 by using hydrochloric acid, heating and evaporating, concentrating raw water to 30% -50%, evaporating water, condensing and collecting, centrifuging the evaporated concentrated solution, and recovering white solid sodium chloride.
9. The nicosulfuron waste water treatment method according to claim 1, characterized in that 2) sodium chloride is recovered by evaporation: evaporating by adopting an MVR evaporator; the pressure is controlled to be-0.09 Mpa and the temperature is controlled to be 90 ℃ in the heating and evaporation process.
10. The nicosulfuron waste water treatment method according to claim 1, further comprising:
4) biochemical treatment: mixing the distilled water in the step 2) and the wastewater after micro-electrolysis treatment in the step 3) or respectively entering a biochemical system for treatment;
wherein, the distilled water in the step 2) and the wastewater after micro-electrolysis treatment in the step 3) are mixed according to the volume ratio of 5-7: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849298.9A CN111925069A (en) | 2020-08-21 | 2020-08-21 | Nicosulfuron wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849298.9A CN111925069A (en) | 2020-08-21 | 2020-08-21 | Nicosulfuron wastewater treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111925069A true CN111925069A (en) | 2020-11-13 |
Family
ID=73306124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010849298.9A Pending CN111925069A (en) | 2020-08-21 | 2020-08-21 | Nicosulfuron wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111925069A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315041A (en) * | 2021-12-31 | 2022-04-12 | 宁夏万博生物科技有限公司 | Process system for efficiently treating wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181329A (en) * | 2002-12-02 | 2004-07-02 | Kurita Water Ind Ltd | Wastewater treatment method and apparatus therefor |
| CN104402734A (en) * | 2014-12-02 | 2015-03-11 | 安徽科立华化工有限公司 | Method for recovering dimethylamine from nicosulfuron waste water |
| CN109231664A (en) * | 2018-09-19 | 2019-01-18 | 河南慧锦药业有限公司 | A kind of comprehensive processing technique of high salinity and high COD pharmacy waste water |
| CN109293148A (en) * | 2018-10-26 | 2019-02-01 | 浙江新安化工集团股份有限公司 | A kind of processing unit and its processing method of sulfur-bearing brine waste |
-
2020
- 2020-08-21 CN CN202010849298.9A patent/CN111925069A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181329A (en) * | 2002-12-02 | 2004-07-02 | Kurita Water Ind Ltd | Wastewater treatment method and apparatus therefor |
| CN104402734A (en) * | 2014-12-02 | 2015-03-11 | 安徽科立华化工有限公司 | Method for recovering dimethylamine from nicosulfuron waste water |
| CN109231664A (en) * | 2018-09-19 | 2019-01-18 | 河南慧锦药业有限公司 | A kind of comprehensive processing technique of high salinity and high COD pharmacy waste water |
| CN109293148A (en) * | 2018-10-26 | 2019-02-01 | 浙江新安化工集团股份有限公司 | A kind of processing unit and its processing method of sulfur-bearing brine waste |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315041A (en) * | 2021-12-31 | 2022-04-12 | 宁夏万博生物科技有限公司 | Process system for efficiently treating wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110803835B (en) | Recycling treatment method for quaternary ammonium salt wastewater | |
| CN108439694B (en) | Treatment method for high-salt high-organic matter wastewater evaporation concentration coupling thermocatalysis carbon crystallization | |
| CN106495404B (en) | A kind of processing method of the high salinity cupric organic wastewater of highly acidity | |
| CN111825259A (en) | Steel wastewater membrane concentration salt separation zero-discharge treatment method | |
| CN113562924A (en) | Treatment system and method for resource utilization of high-salinity wastewater in ferrous metallurgy | |
| CN111807589A (en) | Method for recycling high-grade ammonium chloride from high-ammonia nitrogen wastewater in coal chemical industry | |
| CN111661979B (en) | Leachate recycling method and device | |
| CN113480077A (en) | High-salt high-COD wastewater recovery and zero-discharge treatment device and process | |
| CN106830144A (en) | A kind of processing method of high salt high concentrated organic wastewater | |
| CN115872564A (en) | Method for treating mixed wastewater of multiple pesticides | |
| CN104003581A (en) | Treatment process of high-concentration degradation-resistant organic wastewater | |
| CN107963764A (en) | The recovery method of abraum salt in a kind of organic synthesis industry brine waste | |
| CN111925069A (en) | Nicosulfuron wastewater treatment method | |
| CN111252978A (en) | Method for recovering high-purity sodium sulfate in regenerated lead waste liquid | |
| CN113336243A (en) | Method for recovering chemical waste salt | |
| CN103319053A (en) | Treatment process and device of wastewater produced by erythromycin thiocyanate | |
| CN112010513A (en) | High-salt-content organic wastewater recycling treatment system and treatment method | |
| CN112028388A (en) | Method for treating wastewater containing DMF, pyridine and pyridine derivatives | |
| CN102942274B (en) | Treatment method of saline and alkaline wastewater in copper oxide production process | |
| CN104724881A (en) | Treatment method for high salinity industrial wastewater | |
| CN114538690A (en) | Electrochemical combined treatment method for 2,4-D high-salt pesticide organic wastewater | |
| CN109336330B (en) | Efficient treatment method of rubber accelerator wastewater | |
| CN114906963A (en) | Comprehensive utilization process of animal viscera extraction wastewater | |
| CN108002593B (en) | Method for treating wastewater generated in production of molecular sieve catalyst | |
| CN116199709B (en) | Medical organic silicon wastewater recycling treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201113 |
|
| RJ01 | Rejection of invention patent application after publication |