CN105174627A - Method for treating 3,5,6-trichloropyridine-2-sodium alkoxide production waste water - Google Patents
Method for treating 3,5,6-trichloropyridine-2-sodium alkoxide production waste water Download PDFInfo
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- CN105174627A CN105174627A CN201510602427.3A CN201510602427A CN105174627A CN 105174627 A CN105174627 A CN 105174627A CN 201510602427 A CN201510602427 A CN 201510602427A CN 105174627 A CN105174627 A CN 105174627A
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- trichloropyridine
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- sodium alkoxide
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Abstract
The invention relates to a method for treating 3,5,6-trichloropyridine-2-sodium alkoxide production waste water. The method is easy to operate and low in cost. According to the method for treating the 3, 5,6-trichloropyridine-2-sodium alkoxide production waste water, the concentration of COD, ammonia nitrogen, total phosphorus and 3,5,6-trichloropyridine-2-sodium alkoxide in the 3,5,6-trichloropyridine-2-sodium alkoxide production waste water is effectively reduced. Compared with the waste water before treatment, the concentration of COD in the 3,5,6-trichloropyridine-2-sodium alkoxide production waste water is reduced by 93%, the concentration of ammonia nitrogen in the 3,5,6-trichloropyridine-2-sodium alkoxide production waste water is reduced by 59%, the concentration of total phosphorus in the 3,5,6-trichloropyridine-2-sodium alkoxide production waste water is reduced by 75%, and no 3,5,6-trichloropyridine-2-sodium alkoxide is detected in the treated waste water. According to the method, the waste water can be effectively treated and the color is changed. The untreated waste water is dark red, the treated waste water is light yellow or light green or colorless.
Description
Technical field
The present invention relates to field of Environment Protection, particularly a kind for the treatment of process of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent.
Background technology
3,5,6-trichloropyridine-2-sodium alkoxide, being called for short trichloro pyridyl sodium alcoholate, is a kind of important industrial chemicals, is the intermediate of synthesis Multiple Pesticides, be mainly used in spectrum organophosphorus insecticidal/acaricidal agent Chlorpyrifos 94 (O, O-diethyl-O-(3,5,6-trichloro-2-pyridyl) thiophosphatephosphorothioate) production.The composition of trichloro pyridyl sodium alcoholate factory effluent is quite complicated, and containing multiple hazardous and noxious substances such as a large amount of trichloro pyridyl sodium alcoholates, prussiate, muriate, chlorobenzene and heavy metals, its COD concentration is high, and colourity is high, inclined reddish black, and toxicity is large, and biological degradability is poor.Usually, the COD concentration of trichloro pyridyl sodium alcoholate factory effluent is about 5000-8000mg/L, and the content of trichloro pyridyl sodium alcoholate is about 0.03-0.05%, and color is scarlet.If waste water enters rivers water body, not only havoc water ecology, and great threat is formed to environment for human survival.
Chinese scholars has carried out large quantity research to the treatment process of trichloro pyridyl sodium alcoholate waste water, if publication number is the patent of invention of CN103922531A, micro-nano bubbler techniques and the coupling of iron-carbon micro-electrolysis technology are carried out Aerated micro-electrolysis, then combines Fenton oxidation-flocculating settling-distil process.But this operational process of craft is complicated, length consuming time, and high to matching requirements, and cost is higher; Publication number is the patent of invention of CN102765850A, trichloro pyridyl sodium alcoholate method of wastewater treatment comprises the steps such as evaporation, burning, biochemical process, this method needs at substantial heat, and large-scale evaporation and incinerator need be installed, add cost, simultaneously the method is for the process of trichloro pyridyl sodium alcoholate waste water and the concentration of hazardous and noxious substances and COD in reduction waste water not yet in effect, to the process more not too large effect of colourity.
Summary of the invention
In view of this, the object of the present invention is to provide a kind for the treatment of process of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent.The method is simple to operate, and effectively can reduce the concentration of hazardous and noxious substances and COD in 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent, effectively can process waste water color, cost is lower.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind for the treatment of process of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent, its concrete steps are:
A. pre-treatment: with pH regulator to 2-5.5 of acid solution by 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent;
B. in the factory effluent through processing of step A, add gac, wherein the mass ratio of gac and waste water is 0.005-0.02, then stirs;
C. press filtration is carried out to the reactant through step B process, obtain filtrate, then add alkaline solution and carry out neutralization reaction, by the pH regulator to 6 of filtrate-7;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
Anaerobic-anoxic-oxic (AAO) biochemical treatment system technique is the abbreviation of anaerobic-anoxic-oxic combination process, is be made up of three sections of biological treatment devices.The difference of it and single-stage anaerobic-aerobic (AO) technique is that front end arranges an anaerobic reactor, be intended to by anaerobic process, the part hardly degraded organic substance in waste water be degraded removal, and then improve the biodegradability of waste water, and provide the carbon source being suitable for denitrification process for follow-up anoxic section, finally reach the object efficiently removing COD, nitrogen, phosphorus.
Further, acid solution described in steps A adopts massfraction to be the hydrochloric acid soln of 20%-36.5%.
Hydrochloric acid is colourless liquid (industrial hydrochloric acid can show slightly yellow because there being impurity trivalent iron salt), and being corrosive, is the aqueous solution of hydrogenchloride, has irritating smell.
Further, the press filtration in step C adopts plate-and-frame filter press press filtration, and recovered carbon.
Gac is the sorbent material generally adopted in current water treatment.Research shows, gac is not only to the organism dissolved in water, as benzene-like compounds, phenolic compound, oil and petroleum products etc. have stronger adsorptive power, and to the organism being difficult to biological process and additive method remove, as the organic compound of colourity, odor smell, surfactant, agricultural chemicals, synthetic detergent, synthetic dyestuff, aminated compounds and many synthetic and heavy metal have good removal effect; The gac finally reached capacity can desorption and regeneration reusing, and this advantage can reduce cost for wastewater treatment greatly, reduces waste sludge discharge.
Further, in step B, described whipping process is at room temperature to stir 20-70min.
Further, in step C, described alkaline solution adopts massfraction to be the NaOH solution of 30%-40%.
NaOH is commonly called as caustic soda, caustic soda, caustic soda, and be a kind of highly basic with very severe corrosive, (time water-soluble heat release) soluble in water also forms basic solution.There are bulk, sheet, granular and bar-shaped etc., can be used for the pH value regulating water, also can be used for the industrial circles such as sterilization, papermaking, smelting.
Further, in steps A, pH optimal adjustment to 4-5 of factory effluent.
Further, in step B, the mass ratio of gac and waste water is 0.01-0.015.
Further, in step B, described whipping process is at room temperature to stir 30-60min.
Further, in step B, described whipping process is at room temperature to stir 20-70min.
Further, in step C, described alkaline solution adopts massfraction to be the NaOH solution of 30%-40%.
Further, in steps A, pH optimal adjustment to 4-5 of factory effluent.
Further, in step B, the mass ratio of gac and waste water is 0.01-0.015.
Further, in step B, described whipping process is at room temperature to stir 30-60min.
The effect of stirring is the contact area in order to increase gac and waste water, thus makes the impurity in gac absorption waste water as much as possible.
Advantageous Effects of the present invention is:
The method is simple to operate, and effectively can reduce the concentration of hazardous and noxious substances and COD in 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent, effectively can process waste water color, cost is lower.This treatment process effectively reduces the concentration of COD, ammonia nitrogen, total phosphorus and 3,5,6-trichloropyridine-2-sodium alkoxide in 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent.Compared with before process, in 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent, the concentration of COD reduces 93%, and the concentration of ammonia nitrogen reduces 59%, and the concentration of total phosphorus reduces 75%, does not detect 3,5,6-trichloropyridine-2-sodium alkoxide in the waste water after process.This treatment process effectively can process waste water color.Waste water before treatment is scarlet, and the waste water after process is then in light yellow, light green or colourless.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below embodiments of the invention are described in detail.
Embodiment 1
Use 3,5,6-trichloropyridine-2-sodium alkoxide factory effluents of Chongqing Hua Ge biochemistry corporation,Ltd. as pending waste water.
The treatment process of this 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is:
A. getting 3,5,6-trichloropyridine-2-sodium alkoxide 1000kg, is that the hydrochloric acid soln of 20% is by the pH regulator to 2 of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent with massfraction;
B. in the factory effluent through processing of step A, add 5kg gac and stir 20min at ambient temperature;
C. press filtration is carried out and recovered carbon to the reactant plate-and-frame filter press through step B process, add massfraction be 30% NaOH solution carry out neutralization reaction, by the pH regulator to 7 of filtrate;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
Detect the COD content before and after this 3,5,6-trichloropyridine-2-sodium alkoxide production wastewater treatment, ammonia-nitrogen content, total phosphorous and 3,5,6-trichloropyridine-2-alcohol sodium content, check the color of waste water before and after process.Detected result is as shown in the table:
Embodiment 2
The source of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is identical with embodiment 1.
The treatment process of this 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is:
A. getting 3,5,6-trichloropyridine-2-sodium alkoxide 1000kg, is that the hydrochloric acid soln of 36.5% is by the pH regulator to 5.5 of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent with massfraction;
B. in the factory effluent through processing of step A, add 20kg gac and stir 70min at ambient temperature;
C. press filtration is carried out and recovered carbon to the reactant plate-and-frame filter press through step B process, add massfraction be 40% NaOH solution carry out neutralization reaction, by the pH regulator to 6 of filtrate;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
Detect the COD content before and after this 3,5,6-trichloropyridine-2-sodium alkoxide production wastewater treatment, ammonia-nitrogen content, total phosphorous and 3,5,6-trichloropyridine-2-alcohol sodium content, check the color of waste water before and after process.Detected result is as shown in the table:
Embodiment 3
The source of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is identical with embodiment 1.
The treatment process of this 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is:
A. getting 3,5,6-trichloropyridine-2-sodium alkoxide 1000kg, is that the hydrochloric acid soln of 32% is by the pH regulator to 5 of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent with massfraction;
B. in the factory effluent through processing of step A, add 15kg gac and stir 60min at ambient temperature;
C. press filtration is carried out and recovered carbon to the reactant plate-and-frame filter press through step B process, add massfraction be 36% NaOH solution carry out neutralization reaction, by the pH regulator to 6.5 of filtrate;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
Detect the COD content before and after this 3,5,6-trichloropyridine-2-sodium alkoxide production wastewater treatment, ammonia-nitrogen content, total phosphorous and 3,5,6-trichloropyridine-2-alcohol sodium content, check the color of waste water before and after process.Detected result is as shown in the table:
Embodiment 4
The source of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is identical with embodiment 1.
The treatment process of this 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent is:
A. getting 3,5,6-trichloropyridine-2-sodium alkoxide 1000kg, is that the hydrochloric acid soln of 32% is by the pH regulator to 4 of 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent with massfraction;
B. in the factory effluent through processing of step A, add 10kg gac and stir 30min at ambient temperature;
C. press filtration is carried out and recovered carbon to the reactant plate-and-frame filter press through step B process, add massfraction be 33% NaOH solution carry out neutralization reaction, by the pH regulator to 6.8 of filtrate;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
Detect the COD content before and after this 3,5,6-trichloropyridine-2-sodium alkoxide production wastewater treatment, ammonia-nitrogen content, total phosphorous, 3,5,6-trichloropyridine-2-alcohol sodium contents, check the color of waste water before and after process.Detected result is as shown in the table:
From above four embodiments, compared with before process, 3,5, in 6-trichloropyridine-2-sodium alkoxide factory effluent, the concentration of COD reduces 93%, and the concentration of ammonia nitrogen reduces 59%, and the concentration of total phosphorus reduces 75%, 3,5,6-trichloropyridine-2-sodium alkoxide is not detected in waste water after process.This treatment process effectively reduces the concentration of COD, ammonia nitrogen, total phosphorus and 3,5,6-trichloropyridine-2-sodium alkoxide in 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent.Waste water before treatment is scarlet, and the waste water after process is then in light yellow, light green or colourless.Prove thus, this treatment process has carried out effective process to waste water color.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, those of ordinary skill in the art is to be understood that, can modify to technical scheme or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. the treatment process of a trichloropyridine-2-sodium alkoxide factory effluent, it is characterized in that, concrete steps are:
A. pre-treatment: with pH regulator to 2-5.5 of acid solution by 3,5,6-trichloropyridine-2-sodium alkoxide factory effluent;
B. in the factory effluent through processing of step A, add gac, wherein the mass ratio of gac and waste water is 0.005-0.02, then stirs;
C. press filtration is carried out to the reactant through step B process, obtain filtrate, then add alkaline solution and carry out neutralization reaction, by the pH regulator to 6 of filtrate-7;
D. it is complete the reactant through step C process to be entered that anaerobism-anoxic-aerobic treatment system carries out biochemical treatment.
2. treatment process according to claim 1, is characterized in that: acid solution described in steps A adopts massfraction to be the hydrochloric acid soln of 20%-36.5%.
3. treatment process according to claim 1, is characterized in that: the press filtration in step C adopts plate-and-frame filter press press filtration, and recovered carbon.
4. treatment process according to claim 1, is characterized in that: in step B, described whipping process is at room temperature to stir 20-70min.
5. treatment process according to claim 1, is characterized in that: in step C, and described alkaline solution adopts massfraction to be the NaOH solution of 30%-40%.
6. treatment process according to claim 1, is characterized in that: in steps A, pH optimal adjustment to 4-5 of factory effluent.
7. treatment process according to claim 1, is characterized in that: in step B, and the mass ratio of gac and waste water is 0.01-0.015.
8. treatment process according to claim 4, is characterized in that: in step B, described whipping process is at room temperature to stir 30-60min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105800828A (en) * | 2016-04-27 | 2016-07-27 | 滨海明鸿精细化工有限公司 | Method for recycling sodium pyrithione in waste water |
| CN112723667A (en) * | 2020-12-17 | 2021-04-30 | 重庆华歌生物化学有限公司 | Method for treating high-salinity wastewater of sodium trichloropyridinol |
| CN115321707A (en) * | 2022-08-04 | 2022-11-11 | 内蒙古犇星化学有限公司 | Method for treating alkaline hydrolysis wastewater of mother liquor of sodium trichloropyridinol |
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| CN102765841A (en) * | 2012-05-15 | 2012-11-07 | 山西三维丰海化工有限公司 | Method for recovering 3,5,6-Trichloropyridin-2-ol sodium from 3,5,6-Trichloropyridin-2-ol sodium alkaline hydrolysis wastewater |
| CN104447520A (en) * | 2014-11-13 | 2015-03-25 | 安徽国星生物化学有限公司 | Pretreatment process of synthetic waste liquid of 3,5-6-trichloropyridin-2-ol sodium |
| CN104829054A (en) * | 2015-04-29 | 2015-08-12 | 重庆华歌生物化学有限公司 | Method for processing wastewater generated in trichloropyridin-ol sodium production |
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2015
- 2015-09-21 CN CN201510602427.3A patent/CN105174627A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102765841A (en) * | 2012-05-15 | 2012-11-07 | 山西三维丰海化工有限公司 | Method for recovering 3,5,6-Trichloropyridin-2-ol sodium from 3,5,6-Trichloropyridin-2-ol sodium alkaline hydrolysis wastewater |
| CN104447520A (en) * | 2014-11-13 | 2015-03-25 | 安徽国星生物化学有限公司 | Pretreatment process of synthetic waste liquid of 3,5-6-trichloropyridin-2-ol sodium |
| CN104829054A (en) * | 2015-04-29 | 2015-08-12 | 重庆华歌生物化学有限公司 | Method for processing wastewater generated in trichloropyridin-ol sodium production |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105800828A (en) * | 2016-04-27 | 2016-07-27 | 滨海明鸿精细化工有限公司 | Method for recycling sodium pyrithione in waste water |
| CN105800828B (en) * | 2016-04-27 | 2019-07-23 | 滨海明鸿精细化工有限公司 | The recovery method of sodium pyrithione in a kind of waste water |
| CN112723667A (en) * | 2020-12-17 | 2021-04-30 | 重庆华歌生物化学有限公司 | Method for treating high-salinity wastewater of sodium trichloropyridinol |
| CN115321707A (en) * | 2022-08-04 | 2022-11-11 | 内蒙古犇星化学有限公司 | Method for treating alkaline hydrolysis wastewater of mother liquor of sodium trichloropyridinol |
| CN115321707B (en) * | 2022-08-04 | 2023-11-21 | 内蒙古犇星化学有限公司 | Mother liquor alkaline hydrolysis wastewater treatment method of sodium trichloropyridine alkoxide |
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Application publication date: 20151223 |