CN101913733A - Wastewater treatment process of dimethoate pesticide - Google Patents
Wastewater treatment process of dimethoate pesticide Download PDFInfo
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- CN101913733A CN101913733A CN 201010249187 CN201010249187A CN101913733A CN 101913733 A CN101913733 A CN 101913733A CN 201010249187 CN201010249187 CN 201010249187 CN 201010249187 A CN201010249187 A CN 201010249187A CN 101913733 A CN101913733 A CN 101913733A
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Abstract
The invention relates to a wastewater treatment process of a dimethoate pesticide, in particular to a wastewater treatment method of the dimethoate pesticide, and belongs to the technical field of chemistry. Wastewater of the dimethoate pesticide is subjected to photo-assisted Fenton oxidation treatment for 15 to 120 minutes (min), effluent is diluted to reach twofold volume after a reaction is finished, and the diluted effluent is subjected to biological treatment for 5 to 8 hours (h) through a cyclic activated sludge process (a CAST process for short); the wastewater of the dimethoate pesticide is only subjected to Fenton process pretreatment and the CAST process, so the wastewater treatment process is superior to a method which is used for treating the wastewater by combining three processes of photo-assisted Fenton, flocculation and micro-biological degradation and is reported in an invention publication (CN1636983A); the optimum time required by a Fenton pre-reaction process does not exceed 0.5 hour, and compared with that of the conventional method, the pretreatment time is shortened greatly and is superior to time required by various pretreatment processes in a document, namely 'the summarization of a pretreatment method of organophosphorus pesticide wastewater'; and the final CODcr removal rate of the wastewater of the dimethoate pesticide can reach 95 percent.
Description
Technical field
The invention belongs to technical field of chemistry, specifically is a kind of method of dimethoate pesticide wastewater treatment.
Background technology
Rogor (dimethoate) is a kind of organophosphorus pesticide that is widely used in Insecticiding-miticiding, is to produce one of main sterilant that uses at present both at home and abroad.Dimethoate pesticide waste water has that Pollutant levels height, toxicity are big, the characteristics of difficult degradation, and traditional dimethoate pesticide method of wastewater treatment is mainly Coagulation Method, absorption method, biochemical process etc., just has problems such as pretreating effect is poor, the treatment time is long but above-mentioned technology is general.
Advanced oxidation processes is the novel sewage treatment process of rising in recent years, has advantages such as oxidation capacity is strong, the treatment time is short, such as Fenton oxidation style, ozone oxidation method, ultrasound oxidation technology etc.Wang Jun discloses a kind of method of utilizing the supersonic method degrading organic phosphor pesticides in its patent (CN1752025 A); Wang Xiaojun etc. have invented a kind of ozone heterogeneous catalytic oxidation water treatment device (CN201077792 Y); Hou Yu etc. disclose the method for utilizing Fenton process to dispose of sewage in its patent (CN101659467 A); Liu Guangming etc. disclose in its patent (CN1636983 A) and have utilized light to help Fenton, flocculation and three kinds of technology couplings of microbiological deterioration to handle the method for waste water, though its method waste water COD
CrClearance is higher, but its treatment process is still apparent tediously long, and energy consumption is excessive.
Summary of the invention
The object of the invention is to have proposed a kind of light and helps Fenton and circulating type active sludge method (Cyclic Activated Sludge Technology, abbreviation CAST) method of dimethoate pesticide waste water is handled in coupling, can shorten pretreatment time, reduces technical process, improve waste water COD
CrRemove efficient.
Technical scheme provided by the invention is: raw material is the dimethoate pesticide waste water solution, at first it is carried out light and help Fenton oxidation pre-treatment 15-120 minute (min), reaction after finishing water outlet to be diluted to two volumes, enter CAST technology carry out a biological disposal upon 5-8 hour (h).The concrete operations step is as follows:
1, helps to the light that dimethoate pesticide waste water is housed and add hydrogen peroxide (H in the Fenton oxidation reactor
2O
2);
2, add ferrous sulfate (FeSO
47H
2O);
3, open ultraviolet lamp;
4, regulate the pH value;
5, pre-treatment 15-120min;
6, water outlet is diluted to two volumes;
7, utilize constant flow pump will dilute back waste water and squeeze into the circulating type active sludge reactor, open mud simultaneously and reflux, flooding time is 1 h;
8, beginning aeration, and control aeration rate, aeration time 2-5 h;
9, staticly settle 1 h;
10, stop mud and reflux, from the top draining of circulating type active sludge reactor, and control draining ratio, water discharge time is 1 h.
Key point:
(1), Fenton technology dimethoate pesticide waste strength is 1000-10000mg/L among the present invention, Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance reaches as high as 74.7%; Hydrogen peroxide (H
2O
2) and ferrous sulfate (FeSO
47H
2O) be initial disposable the adding of reaction; All the time adopt uv light irradiation in the reaction process; FeSO
4Dosage is 0-30mmol/L; H
2O
2Dosage is 10-100mmol/L; PH value regulation range is 2-12; Ultraviolet lamp power is 20-50W.
(2), CAST technology dimethoate pesticide waste strength is 250-1000mg/L among the present invention, CAST technology water outlet COD
CrClearance reaches as high as 60%; Gas-water ratio in the reaction process (refer to the gas volume that per hour feeds with per hour the ratio of flooding quantity) is controlled at 8:1 to 5:1; Aeration time is at 2-5h in the reaction process; Each reaction back draining is 6:1 to 3:1 than the ratio of CAST reactor useful volume (volume of displacement with); The mud quantity of reflux is 10-100%.
According to technical scheme of the present invention, dimethoate pesticide waste water only need pass through pre-treatment of Fenton technology and CAST technology two procedures, is better than the light that utilizes of report in its patent (CN1636983 A) such as Liu Guangming and helps Fenton, flocculation and three kinds of technology couplings of microbiological deterioration to handle the method for waste water; The required Best Times of Fenton pre-reaction technology is no more than 0.5h, compares the traditional method pretreatment time and shortens dramatically, and is better than various pretreatment technology required times in the document (the pretreatment process summary of organophosphorus pesticide wastewater, Xu Zhongjuan, 2002); The final COD of dimethoate pesticide waste water
CrClearance can reach 95%.
Description of drawings
What accompanying drawing was showed is the wastewater treatment process of dimethoate pesticide schema.
1-light helps the Fenton oxidation reactor, and 2-dilutes equalizing tank, 3-CAST reactor.
Embodiment
Embodiment 1: with the former medicine preparation of dimethoate pesticide dimethoate pesticide waste water 15L, its COD
CrConcentration is 4000mg/L, helps Fenton oxidation pre-treatment 30min, hydrogen peroxide (H through light
2O
2) and ferrous sulfate (FeSO
47H
2O) for initial disposable the adding of reaction, adopt uv light irradiation in the reaction process all the time, FeSO
4Dosage is 22mmol/L, H
2O
2Dosage is 90mmol/L, and the pH value is 3, and ultraviolet lamp power is 20W.Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance is 74.7%.Pretreatment reaction is diluted to two volumes with water outlet after finishing, enter CAST technology 7h(1 h of wherein intaking that carries out a biological disposal upon, aerated reaction 4 h, the time of staticly settling is 1h, (row) the water time of straining is 1h), gas-water ratio is controlled at 6:1 in the reaction process, and draining is than being 5:1, the mud quantity of reflux is 20%, CAST technology water outlet COD
CrClearance is 60%.Fenton oxidation pre-treatment and its COD of CAST technology coupling
CrTotal clearance is 95%.
Embodiment 2: with the former medicine preparation of dimethoate pesticide dimethoate pesticide waste water 15L, its COD
CrConcentration is 4000mg/L, helps Fenton oxidation pre-treatment 30min, hydrogen peroxide (H through light
2O
2) and ferrous sulfate (FeSO
47H
2O) for initial disposable the adding of reaction, adopt uv light irradiation in the reaction process all the time, FeSO
4Dosage is 15mmol/L, H
2O
2Dosage is 75mmol/L, and the pH value is 3, and ultraviolet lamp power is 30W.Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance is 71%.Pretreatment reaction is diluted to two volumes with water outlet after finishing, enter CAST technology 6h(1 h of wherein intaking that carries out a biological disposal upon, aerated reaction 3h, the time of staticly settling is 1h, (row) the water time of straining is 1h), gas-water ratio is controlled at 7:1 in the reaction process, and draining is than being 6:1, the mud quantity of reflux is 20%, CAST technology water outlet COD
CrClearance is 53%.Fenton oxidation pre-treatment and CAST technology coupling COD
CrTotal clearance is 93%.
Claims (4)
1. wastewater treatment process of dimethoate pesticide, at first it being carried out light helps Fenton oxidation pre-treatment (min), reaction in 15-120 minute after finishing water outlet to be diluted to two volumes, enter CAST technology carry out a biological disposal upon 5-8 hour (h) it is characterized in that, be specially:
(1), helps to the light that dimethoate pesticide waste water is housed and add hydrogen peroxide (H in the Fenton oxidation reactor
2O
2);
(2), add ferrous sulfate (FeSO
47H
2O);
(3), open ultraviolet lamp;
(4), regulate the pH value;
(5), pre-treatment 15-120min;
(6), water outlet is diluted to two volumes;
(7), utilize constant flow pump will dilute back waste water to squeeze into the circulating type active sludge reactor, open mud simultaneously and reflux, flooding time is 1 h;
(8), the beginning aeration, and control aeration rate, aeration time 2-5 h;
(9), staticly settle 1 h;
(10), stop mud and reflux, from the top draining of circulating type active sludge reactor, and control draining ratio, water discharge time is 1 h.
2. according to the described wastewater treatment process of dimethoate pesticide of claim 1, it is characterized in that:
(1), middle Fenton technology dimethoate pesticide waste strength is 1000-10000mg/L, Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance reaches as high as 74.7%; Hydrogen peroxide (H
2O
2) and ferrous sulfate (FeSO
47H
2O) be initial disposable the adding of reaction; All the time adopt uv light irradiation in the reaction process; FeSO
4Dosage is 0-30mmol/L; H
2O
2Dosage is 10-100mmol/L; PH value regulation range is 2-12; Ultraviolet lamp power is 20-50W;
(2), be 250-1000mg/L at CAST technology dimethoate pesticide waste strength, CAST technology water outlet COD
CrClearance reaches as high as 60%; Gas-water ratio in the reaction process (refer to the gas volume that per hour feeds with per hour the ratio of flooding quantity) is controlled at 8:1 to 5:1; Aeration time is at 2-5h in the reaction process; Each reaction back draining is 6:1 to 3:1 than the ratio of CAST reactor useful volume (volume of displacement with); The mud quantity of reflux is 10-100%.
3. according to claim 1 or 2 described wastewater treatment process of dimethoate pesticide, it is characterized in that: with the former medicine preparation of dimethoate pesticide dimethoate pesticide waste water 15L, its COD
CrConcentration is 4000mg/L, helps Fenton oxidation pre-treatment 30min, hydrogen peroxide (H through light
2O
2) and ferrous sulfate (FeSO
47H
2O) for initial disposable the adding of reaction, adopt uv light irradiation in the reaction process all the time, FeSO
4Dosage is 22mmol/L, H
2O
2Dosage is 90mmol/L, and the pH value is 3, and ultraviolet lamp power is 20W; Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance is 74.7%; Pretreatment reaction is diluted to two volumes with water outlet after finishing, enter CAST technology 7h(1 h of wherein intaking that carries out a biological disposal upon, aerated reaction 4 h, the time of staticly settling is 1h, (row) the water time of straining is 1h), gas-water ratio is controlled at 6:1 in the reaction process, and draining is than being 5:1, the mud quantity of reflux is 20%, CAST technology water outlet COD
CrClearance is 60%, Fenton oxidation pre-treatment and its COD of CAST technology coupling
CrTotal clearance is 95%.
4. according to claim 1 or 2 described wastewater treatment process of dimethoate pesticide, it is characterized in that: with the former medicine preparation of dimethoate pesticide dimethoate pesticide waste water 15L, its COD
CrConcentration is 4000mg/L, helps Fenton oxidation pre-treatment 30min, hydrogen peroxide (H through light
2O
2) and ferrous sulfate (FeSO
47H
2O) for initial disposable the adding of reaction, adopt uv light irradiation in the reaction process all the time, FeSO
4Dosage is 15mmol/L, H
2O
2Dosage is 75mmol/L, and the pH value is 3, and ultraviolet lamp power is 30W; Fenton technology water outlet chemical oxygen demand (COD) (COD
Cr) clearance is 71%; Pretreatment reaction is diluted to two volumes with water outlet after finishing, enter CAST technology 6h(1 h of wherein intaking that carries out a biological disposal upon, aerated reaction 3h, the time of staticly settling is 1h, (row) the water time of straining is 1h), gas-water ratio is controlled at 7:1 in the reaction process, and draining is than being 6:1, the mud quantity of reflux is 20%, CAST technology water outlet COD
CrClearance is 53%; Fenton oxidation pre-treatment and CAST technology coupling COD
CrTotal clearance is 93%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010249187 CN101913733B (en) | 2010-08-10 | 2010-08-10 | Wastewater treatment process of dimethoate pesticide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010249187 CN101913733B (en) | 2010-08-10 | 2010-08-10 | Wastewater treatment process of dimethoate pesticide |
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| Publication Number | Publication Date |
|---|---|
| CN101913733A true CN101913733A (en) | 2010-12-15 |
| CN101913733B CN101913733B (en) | 2012-07-04 |
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ID=43321416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010249187 Expired - Fee Related CN101913733B (en) | 2010-08-10 | 2010-08-10 | Wastewater treatment process of dimethoate pesticide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167460A (en) * | 2011-03-25 | 2011-08-31 | 中国科学院南京土壤研究所 | Organic phosphonic acid and inorganic phosphorus-containing wastewater treatment technology |
| CN102424466A (en) * | 2011-10-25 | 2012-04-25 | 厦门大学 | Dye wastewater treatment method |
| CN102531234A (en) * | 2011-12-30 | 2012-07-04 | 华南理工大学 | Method for pretreatment of alkaline waste water through fenton oxidation |
| CN107739128A (en) * | 2017-10-25 | 2018-02-27 | 江苏腾龙生物药业有限公司 | A kind of wastewater treatment process of dimethoate pesticide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080008535A1 (en) * | 2006-06-27 | 2008-01-10 | Enchem Engineering, Inc. | Soil and water remediation method and apparatus |
| CN101597104A (en) * | 2009-07-28 | 2009-12-09 | 贵州省环境科学研究设计院 | The method of multiple Microcystin in a kind of fenton photocatalytic oxidation degradation water |
| CN101671089A (en) * | 2009-10-12 | 2010-03-17 | 福建三农集团股份有限公司 | Pretreatment method for glyphosate industrial waste water |
| CN101786756A (en) * | 2010-02-09 | 2010-07-28 | 广西博世科环保科技有限公司 | Process method for treating hardly-biodegradable organic wastewater |
-
2010
- 2010-08-10 CN CN 201010249187 patent/CN101913733B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080008535A1 (en) * | 2006-06-27 | 2008-01-10 | Enchem Engineering, Inc. | Soil and water remediation method and apparatus |
| CN101597104A (en) * | 2009-07-28 | 2009-12-09 | 贵州省环境科学研究设计院 | The method of multiple Microcystin in a kind of fenton photocatalytic oxidation degradation water |
| CN101671089A (en) * | 2009-10-12 | 2010-03-17 | 福建三农集团股份有限公司 | Pretreatment method for glyphosate industrial waste water |
| CN101786756A (en) * | 2010-02-09 | 2010-07-28 | 广西博世科环保科技有限公司 | Process method for treating hardly-biodegradable organic wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 《WATER RESEARCH》 20081127 M.M. Ballesteros Martin Degradation of a four-pesticide mixture by combined photo-Fenton and biological oxidation 摘要 1,3-4 第43卷, 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167460A (en) * | 2011-03-25 | 2011-08-31 | 中国科学院南京土壤研究所 | Organic phosphonic acid and inorganic phosphorus-containing wastewater treatment technology |
| CN102167460B (en) * | 2011-03-25 | 2012-07-25 | 中国科学院南京土壤研究所 | Organic phosphonic acid and inorganic phosphorus-containing wastewater treatment technology |
| CN102424466A (en) * | 2011-10-25 | 2012-04-25 | 厦门大学 | Dye wastewater treatment method |
| CN102531234A (en) * | 2011-12-30 | 2012-07-04 | 华南理工大学 | Method for pretreatment of alkaline waste water through fenton oxidation |
| CN107739128A (en) * | 2017-10-25 | 2018-02-27 | 江苏腾龙生物药业有限公司 | A kind of wastewater treatment process of dimethoate pesticide |
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| Publication number | Publication date |
|---|---|
| CN101913733B (en) | 2012-07-04 |
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Granted publication date: 20120704 Termination date: 20180810 |