CN110407279A - A kind of diquat dibromide wastewater treatment method - Google Patents
A kind of diquat dibromide wastewater treatment method Download PDFInfo
- Publication number
- CN110407279A CN110407279A CN201910614267.2A CN201910614267A CN110407279A CN 110407279 A CN110407279 A CN 110407279A CN 201910614267 A CN201910614267 A CN 201910614267A CN 110407279 A CN110407279 A CN 110407279A
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- CN
- China
- Prior art keywords
- extractant
- diquat dibromide
- wastewater treatment
- treatment method
- reaction kettle
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- 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
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- 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
- C02F2101/306—Pesticides
Abstract
The invention discloses a kind of diquat dibromide wastewater treatment methods, comprising the following steps: (1) diquat dibromide waste water is sent into reaction kettle, reconciles pH value to 9.5-10.5；(2) extractant is added into reaction kettle；(3) reaction kettle opens stirring, reacts 50-70 minutes；(4) stop stirring after reaction, product is subjected to water-oil separating；(5) extractant after separating continues to reuse to saturation.The present invention uses treatment by extraction diquat dibromide waste water, simple and easy, can cancel the use of active carbon, by the 2 of water outlet, the control of 2- bipyridyl concentration can not only mitigate the pressure of three wastes workshop biochemical treatment, while 2 extracted in lower concentration significantly, 2- bipyridyl can also be come out by back extraction, for the reproduction of front end, it is recycled, improves efficiency, more production costs are saved, are a practical efficient processing methods.
Description
Technical field
The invention belongs to technical field of waste water processing more particularly to a kind of diquat dibromide wastewater treatment methods.
Background technique
Diquat dibromide, 1,1 '-ethylene -2 of chemical name, 2 '-bipyridyl dibromo salts are the exploitations of Syngenta chemical company, Britain
The non-selective contact herbicide of one kind and desiccant, and one of most widely used herbicide products in the whole world at present are global
Sales volume and usage amount are only second to glyphosate and paraquat.
Diquat dibromide is generally used for conductibility and tags steriland herbicide, can be rapidly by green plants tissue resorption, with soil
It can lose activity quickly after contact, the weedings such as be chiefly used in front of crop field, orchard, bare place, harvesting and be used, be also used as potato
It is urged with the cauline leaf of pachyrhizus withered；In the serious place of gramineae weed, it is more preferable that effect with paraquat is used together with diquat dibromide.Enemy's grass
Exist generally in the form of the single carbohydrate of dibromo salt fastly, commercially available diquat dibromide process preparation is mostly 20% aqua form.
The large-scale use of diquat dibromide brings a large amount of waste water generated in its production, contains 2,2- in diquat dibromide waste water
Bipyridyl, concentration 900-1800mg/L, which, which encounters ferrous ion, will make water body become red, very influence visual impression
Official.Mainstream processing method is to be disposed using powder electroless plating, but this method treatment effect is bad, the water outlet water of processing at present
Matter fluctuation is larger, may generate a part of high-concentration waste water discharge, cause unnecessary trouble, and this method to the producer
A large amount of waste active carbon can be generated after processing, increase processing cost, it is therefore desirable to improve.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, a kind of diquat dibromide wastewater treatment method is provided, to mention
High wastewater effluent quality reduces processing cost.
In order to achieve the above purpose, the present invention the following technical schemes are provided:
A kind of diquat dibromide wastewater treatment method, comprising the following steps:
(1) diquat dibromide waste water is sent into reaction kettle, reconciles pH value to 9.5-10.5；
(2) extractant is added into reaction kettle；
(3) reaction kettle opens stirring, reacts 50-70 minutes；
(4) stop stirring after reaction, product is subjected to water-oil separating；
(5) extractant after separating continues to reuse to saturation.
Any one of extractant in toluene, chloroform, petroleum ether in the step 2.
Since dissolubility of 2, the 2- bipyridyl in toluene, chloroform, petroleum ether in diquat dibromide waste water is above water,
And these three extractants are not soluble in water, therefore 2, the 2- bipyridyl that can be efficiently used in extraction wastewater.
Preferably, extractant is toluene in the step 2.
Extractant usage amount is the 45-55% of wastewater volume in the step 2.
Extractant extracts 3-5 times repeatedly in the step 5.
Since 2,2- bipyridyl also has lower dissolubility in water, it is therefore desirable to be reduced in waste water by repeatedly extracting
2,2- bipyridyl content.
The diquat dibromide wastewater treatment method further includes stripping process, specific steps are as follows: by the extractant of saturation and acid
Solution is mixed with the ratio of volume ratio 1 to 1, stops layering after being stirred to react, and is separated oil and is mutually continued as extractant, in acid solution then
It is reusable in production containing a large amount of bipyridyls.
Wherein the acid solution is dilute hydrochloric acid or dilute sulfuric acid.
The invention has the advantages that
The present invention uses treatment by extraction diquat dibromide waste water, simple and easy, can cancel the use of active carbon, by water outlet
2,2- bipyridyl concentration are controlled in lower concentration, can not only be mitigated the pressure of three wastes workshop biochemical treatment significantly, be extracted simultaneously
2,2- bipyridyl can also be come out by back extraction, for the reproduction of front end, be recycled, improve efficiency, saving is more produced into
This, is a practical efficient processing method.
Specific embodiment
Below in conjunction with specific example, technical scheme is described further:
Embodiment 1
A kind of diquat dibromide wastewater treatment method, comprising the following steps:
(1) 1600L waste water is squeezed into reaction kettle, reconciles pH value to 10；
(2) extractant 800L is added；
(3) it opens and stirs, the reaction time 60 minutes；
(4) stop reaction, by water-oil separating；
(5) extractant after separating continues to repeat extraction 4 times extremely saturation；
(6) extractant of saturation and dilute sulfuric acid are mixed with the ratio of volume ratio 1 to 1, stops layering after being stirred to react, point
Fuel-displaced phase continues as extractant, and a large amount of bipyridyls are then contained in acid solution, reusable in production.
Embodiment 2
A kind of diquat dibromide wastewater treatment method, comprising the following steps:
(1) 1600L waste water is squeezed into reaction kettle, reconciles pH value to 10.5；
(2) extractant 800L is added；
(3) it opens and stirs, the reaction time 55 minutes；
(4) stop reaction, by water-oil separating；
(5) extractant after separating continues to repeat extraction 5 times extremely saturation；
(6) extractant of saturation and dilute hydrochloric acid are mixed with the ratio of volume ratio 1 to 1, stops layering after being stirred to react, point
Fuel-displaced phase continues as extractant, and a large amount of bipyridyls are then contained in acid solution, reusable in production.
Embodiment 3
As a comparison case, by 1600L waste water conventional method, absorption disposition is carried out with Powdered Activated Carbon, the ratio of adding is
2/1000ths.
It is compared by average effect to embodiment 1,2 and embodiment 3, as shown in table 1:
The Contrast on effect of 1 two methods of table
| Influent concentration (mg/L) | Aqueous concentration (mg/L) | Removal rate | |
| Activated carbon method processing | 1335 | 170.38 | 87.24% |
| Treatment by extraction | 1335 | 54.89 | 95.89% |
The Cost comparisons of two methods:
Activated carbon method processing, the ratio that adds are 2/1000ths, i.e., processing 1t waste water dosage is 2KG, and what is handled within 1 year is useless
Water has 15000t or so, i.e. about 30 tons of active carbon consumption, 270,000 yuan of buying expenses, 240,000 yuan of dangerous waste processing cost, amounts to
510000 yuan.
Bipyridyl back extraction can be carried out regeneration after to be extracted dose of saturation by treatment by extraction, and no expense generates, only few
Amount divides the loss of water, and no additional solid waste generates.About 22 tons of the bipyridyl recycled from waste water every year or so, conversion price is 800
Ten thousand yuan or so, 15 tons of loss of extractant or so, a total of about 60,000 yuan.
By comparing it is found that extraction specific activity charcoal method effect is more preferable, the mean concentration of water outlet is lower, can not only subtract significantly
The pressure of light three wastes workshop biochemical treatment, 2, the 2- bipyridyl of extraction can also be come out by back extraction, for the reproduction of front end, improve
Efficiency saves more production costs, not only saves 510,000 yuan of active carbons uses every year and processing cost, the bipyridyl of recycling are even more
It can increase 8,000,000 yuan of benefits, be a practical efficient processing method.
Claims (7)
1. a kind of diquat dibromide wastewater treatment method, which comprises the following steps:
(1) diquat dibromide waste water is sent into reaction kettle, reconciles pH value to 9.5-10.5；
(2) extractant is added into reaction kettle；
(3) reaction kettle opens stirring, reacts 50-70 minutes；
(4) stop stirring after reaction, product is subjected to water-oil separating；
(5) extractant after separating continues to reuse to saturation.
2. diquat dibromide wastewater treatment method according to claim 1, which is characterized in that extractant is selected from the step 2
Toluene, chloroform, any one in petroleum ether.
3. diquat dibromide wastewater treatment method according to claim 1, which is characterized in that extractant is preferred in the step 2
For toluene.
4. diquat dibromide wastewater treatment method according to claim 1, which is characterized in that extractant uses in the step 2
Amount is the 45-55% of wastewater volume.
5. diquat dibromide wastewater treatment method according to claim 1, which is characterized in that extractant is repeatedly in the step 5
Extraction 3-5 times.
6. diquat dibromide wastewater treatment method according to claim 1, which is characterized in that it further include stripping process, it is specific to walk
Suddenly are as follows: the extractant of saturation and acid solution are mixed with the ratio of volume ratio 1 to 1, stops layering after being stirred to react, separates oily phase
Continue as extractant, a large amount of bipyridyls are then contained in acid solution, it is reusable in production.
7. diquat dibromide wastewater treatment method according to claim 6, which is characterized in that the acid solution is dilute hydrochloric acid or dilute
Sulfuric acid.
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Citations (4)
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|---|---|---|---|---|
| CN101074211A (en) * | 2007-06-18 | 2007-11-21 | 浙江工业大学 | Process for treating high-purity pyridine solution |
| CN102976541A (en) * | 2012-11-13 | 2013-03-20 | 安徽国星生物化学有限公司 | New technology for separating waste water containing zinc and nickel |
| CN105330078A (en) * | 2015-09-11 | 2016-02-17 | 安徽金禾实业股份有限公司 | Method for recovering catalyst in B4 workshop section in pyridinium salt production |
| CN106219800A (en) * | 2016-07-26 | 2016-12-14 | 北京惠宇乐邦环保科技有限公司 | A kind of pyridine that mixes produces the processing method of waste water |
-
2019
- 2019-07-09 CN CN201910614267.2A patent/CN110407279A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101074211A (en) * | 2007-06-18 | 2007-11-21 | 浙江工业大学 | Process for treating high-purity pyridine solution |
| CN102976541A (en) * | 2012-11-13 | 2013-03-20 | 安徽国星生物化学有限公司 | New technology for separating waste water containing zinc and nickel |
| CN105330078A (en) * | 2015-09-11 | 2016-02-17 | 安徽金禾实业股份有限公司 | Method for recovering catalyst in B4 workshop section in pyridinium salt production |
| CN106219800A (en) * | 2016-07-26 | 2016-12-14 | 北京惠宇乐邦环保科技有限公司 | A kind of pyridine that mixes produces the processing method of waste water |
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| 《空气和废气监测分析方法指南》编委会编: "《空气和废气监测分析方法指南 上册》", 30 September 2006, 中国环境科学出版社 * |
| 中国环境保护产业协会编: "《注册环保工程师专业考试复习教材 水污染防治工程技术与实践 上 第四版》", 31 March 2017, 中国环境出版社 * |
| 于凤文等: ""生物柴油萃取高浓度吡啶废水"", 《环境工程学报》 * |
| 李德旺主编: "《最新工厂常用清洁剂、脱脂剂、萃取剂操作控制与管理控制及典型案例剖析实务全书》", 30 April 2005, 中国化工出版社 * |
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Application publication date: 20191105 |