CN107253789B - Wastewater treatment process combining ultrasonic wave and Fenton method - Google Patents
Wastewater treatment process combining ultrasonic wave and Fenton method Download PDFInfo
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- CN107253789B CN107253789B CN201710665120.7A CN201710665120A CN107253789B CN 107253789 B CN107253789 B CN 107253789B CN 201710665120 A CN201710665120 A CN 201710665120A CN 107253789 B CN107253789 B CN 107253789B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a wastewater treatment process combining ultrasonic waves and a Fenton method, which comprises the following steps: pretreating the original wastewater; inputting the wastewater into an ultrasonic system for primary degradation treatment; inputting the effluent of the ultrasonic system into a Fenton reactor, adjusting the pH value, adding an oxidant and a catalyst, and carrying out an oxidation reaction; the effluent of the Fenton reactor flows back to the ultrasonic system, and the wastewater is circulated in the ultrasonic system and the Fenton reactor to further oxidize and degrade organic matters; and after circulating for a certain time, inputting the effluent of the Fenton reactor into a flocculation sedimentation tank, adjusting the pH value, adding chemicals, and after flocculation sedimentation is finished, conveying the effluent to a subsequent treatment system. The invention has good treatment effect, good removal effect on some organic matters which are difficult to degrade, reduction of treatment load of subsequent process, obvious reduction of medicament dosage, low iron mud yield and low overall treatment cost.
Description
Technical Field
The invention relates to a wastewater treatment process combining ultrasonic waves and a Fenton method.
Background
The traditional Fenton method generally comprises a reactor, a flocculation sedimentation tank and a dosing system, enough oxidant is added, the reaction time is two hours, the decomposition carbonization removal rate of refractory organic matters is 40-65%, although the Fenton method has a certain effect on most industrial wastewater and can basically meet the process requirements, some problems to be solved still exist in operation and subsequent treatment, such as large equipment size (for example, one ton); the operation cost is high, the pollution components of the high-concentration organic wastewater are degraded by 50-60%, and the cost of the subsequent iron mud treatment is 30-35 yuan/ton; the reaction time is long, and is generally 50-120 min; the iron mud output is many, adds the iron mud of medicine pH regulation flocculation sedimentation dehydration and needs to do the useless processing of danger, and the treatment cost is high, consequently needs to reduce iron mud production volume as far as possible.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a wastewater treatment process combining ultrasonic waves and a Fenton method, which comprises the following steps:
pretreating the original wastewater;
inputting the wastewater into an ultrasonic system for primary degradation treatment;
inputting the effluent of the ultrasonic system into a Fenton reactor, adjusting the pH value, adding an oxidant and a catalyst, and carrying out an oxidation reaction;
the effluent of the Fenton reactor flows back to the ultrasonic system, and the wastewater is circulated in the ultrasonic system and the Fenton reactor to further oxidize and degrade organic matters;
and after circulating for a certain time, inputting the effluent of the Fenton reactor into a flocculation sedimentation tank, adjusting the pH value, adding chemicals, and after flocculation sedimentation is finished, conveying the effluent to a subsequent treatment system.
Preferably, the retention time of the wastewater in the ultrasonic system is 3-5 min.
Preferably, the oxidant is 30% hydrogen peroxide.
Preferably, the catalyst is ferrous sulfate.
Preferably, the oxidizing agent is added in 5 times, and the ratio is 1:31:51:51:51: 15.
Preferably, the ratio of the addition amount of the catalyst to the addition amount of the oxidant added for the first time is 10: 1.
Preferably, the residence time of the wastewater in the fenton reactor is 10 minutes.
Preferably, the circulation time of the wastewater in the ultrasonic system and the Fenton reactor is 30 minutes.
Aiming at the problems of the traditional Fenton method, the invention greatly tries to improve the process, and obtains obvious effects:
improvement 1: the invention combines ultrasonic wave and traditional Fenton method, the ultrasonic wave can oxidize and degrade organic matters through mechanisms such as instant cavitation steady-state cavitation mechanical mechanism pyrolysis and water dissociation, especially has better removal effect on some small molecules which are difficult to degrade by Fenton reagent method, such as methanol, acetic acid and the like, can greatly improve the generation amount and the speed of hydroxyl free in a Fenton system, improve the oxidation effect of oxidant, part of oxidant added in water body is decomposed under the action of ultrasonic wave to produce hydroxyl free radical, and also has obvious oxidation effect on pollutants, and the organic matters which are difficult to degrade are oxidized under multiple actions.
And (3) improvement 2: the adding time of the oxidant (30% hydrogen peroxide) is 5 times, the proportion is 1:31:51:51:51:15, the time interval is 10min, the adding amount of the catalyst (ferrous sulfate) and the proportion of the first-time adding oxidant are 10:1, thus not only ensuring the effect of catalytic oxidation, but also greatly improving the waste caused by the once addition of the oxidant and improving the utilization rate.
Improvement 3: the wastewater to be treated circulates in the Fenton reactor and the ultrasonic system through pumps, the time is distributed to 10min and 5min, the two systems can be fully utilized, and the mixing is increased.
The invention has the following characteristics:
1. compared with the traditional method, the treatment effect of the invention is improved by 20-40%, and the invention has good removal effect on some refractory organics and reduces the treatment load of the subsequent process.
2. The dosage of the oxidant (30 percent hydrogen peroxide) is 2/3, the dosage of the catalyst (ferrous sulfate) is 1/3, and the dosage of the medicament is obviously reduced.
3. The invention has less iron mud output, reduces 2/3 compared with the traditional method, saves flocculating agent, and reduces the reaction time and volume of the flocculation sedimentation tank.
4. The invention saves investment and operation cost, the reaction time is 1/2, the treatment capacity is 2 times of the original treatment capacity, the dosage of the medicament is reduced by more than 1/3, the iron mud is reduced by 2/3, the equipment size is correspondingly reduced, although the ultrasonic system needs a part of investment, the cost is approximately equivalent to the cost saved by reducing the original system size, the investment is slightly improved, the investment per ton of water is far less than that of the original process due to the increase of the treatment capacity, the treatment cost is more than 1/3, and the whole treatment cost is 1/2-2/3 of the original process.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical scheme of the specific implementation of the invention is as follows:
a wastewater treatment process combining ultrasonic waves and a Fenton method comprises the following steps:
pretreating the original wastewater;
inputting the wastewater into an ultrasonic system for primary degradation treatment;
inputting the effluent of the ultrasonic system into a Fenton reactor, adjusting the pH value, adding an oxidant and a catalyst, and carrying out an oxidation reaction;
the effluent of the Fenton reactor flows back to the ultrasonic system, and the wastewater is circulated in the ultrasonic system and the Fenton reactor to further oxidize and degrade organic matters;
and after circulating for a certain time, inputting the effluent of the Fenton reactor into a flocculation sedimentation tank, adjusting the pH value, adding chemicals, and after flocculation sedimentation is finished, conveying the effluent to a subsequent treatment system.
The retention time of the wastewater in the ultrasonic system is 3-5 min.
The oxidant is hydrogen peroxide with the concentration of 30 percent.
The catalyst is ferrous sulfate.
The oxidant is added in 5 times, and the proportion is 1:31:51:51:51:15 respectively.
The ratio of the addition amount of the catalyst to the addition amount of the oxidant added for the first time is 10: 1.
The residence time of the wastewater in the fenton reactor was 10 minutes.
The circulation time of the wastewater in the ultrasonic system and the Fenton reactor is 30 minutes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The wastewater treatment process combining ultrasonic waves and the Fenton method is characterized by comprising the following steps of:
pretreating the original wastewater;
inputting the wastewater into an ultrasonic system for primary degradation treatment;
inputting the effluent of the ultrasonic system into a Fenton reactor, adjusting the pH value, adding an oxidant and a catalyst, and carrying out an oxidation reaction;
the effluent of the Fenton reactor flows back to the ultrasonic system, and the wastewater is circulated in the ultrasonic system and the Fenton reactor to further oxidize and degrade organic matters;
after circulating for a certain time, inputting the effluent of the Fenton reactor into a flocculation sedimentation tank, adjusting the pH value, adding chemicals, and after flocculation sedimentation is finished, conveying the effluent to a subsequent treatment system;
the retention time of the wastewater in the ultrasonic system is 3-5 min;
the oxidant is hydrogen peroxide with the concentration of 30 percent;
the catalyst is ferrous sulfate;
adding the oxidant for 5 times in a ratio of 1:31:51:51:51: 15;
the ratio of the addition amount of the catalyst to the addition amount of the oxidant added for the first time is 10: 1;
the retention time of the wastewater in the Fenton reactor is 10 minutes;
the circulation time of the wastewater in the ultrasonic system and the Fenton reactor is 30 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710665120.7A CN107253789B (en) | 2017-08-07 | 2017-08-07 | Wastewater treatment process combining ultrasonic wave and Fenton method |
| PCT/CN2017/110327 WO2019029033A1 (en) | 2017-08-07 | 2017-11-10 | Wastewater treatment process combining ultrasonic wave and fenton method |
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| CN201710665120.7A CN107253789B (en) | 2017-08-07 | 2017-08-07 | Wastewater treatment process combining ultrasonic wave and Fenton method |
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| CN107253789A CN107253789A (en) | 2017-10-17 |
| CN107253789B true CN107253789B (en) | 2020-12-18 |
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| WO (1) | WO2019029033A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107253789B (en) * | 2017-08-07 | 2020-12-18 | 苏州久沛环保科技有限公司 | Wastewater treatment process combining ultrasonic wave and Fenton method |
| CN111268849A (en) * | 2018-12-05 | 2020-06-12 | 苏州苏讯环保科技有限公司 | Efficient wastewater treatment process based on Fenton reaction |
| CN110668603A (en) * | 2019-10-15 | 2020-01-10 | 山东海景天环保科技股份公司 | Process for treating leather-making biochemical tail water |
| CN114804408A (en) * | 2022-04-07 | 2022-07-29 | 广州珠江天然气发电有限公司 | Method and device for treating and recycling water washing waste liquid of power plant gas turbine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104386868A (en) * | 2014-10-24 | 2015-03-04 | 苏州富奇诺水治理设备有限公司 | Method for treating waste water through Fenton oxidation by utilizing ultrasonic catalysis |
| CN105366836A (en) * | 2014-09-02 | 2016-03-02 | 苏州久沛环保科技有限公司 | Process and device for circulating multi-dimensional catalyzing advanced oxidation treatment of oily wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100494096C (en) * | 2006-07-19 | 2009-06-03 | 重庆大学 | Method for treating printing and dyeing waste water by high pressure cavitation jet combined with fenton reagent |
| EP2319619A1 (en) * | 2009-11-04 | 2011-05-11 | Siemens Aktiengesellschaft | Method and an apparatus for regeneration of an adsorbent |
| IL207783A0 (en) * | 2010-08-24 | 2010-12-30 | Boaz Shitzer | Enhanced advanced oxidation procedure |
| CN104944657B (en) * | 2015-07-03 | 2016-10-05 | 广东沃杰森环保科技股份有限公司 | A kind of sound wave electro-oxidation processes administering waste water |
| CN105417899A (en) * | 2016-01-13 | 2016-03-23 | 樊利华 | Ultrasonic electro-adsorption electro-Fenton and desalination and decoloration water treatment device and method |
| CN107253789B (en) * | 2017-08-07 | 2020-12-18 | 苏州久沛环保科技有限公司 | Wastewater treatment process combining ultrasonic wave and Fenton method |
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- 2017-08-07 CN CN201710665120.7A patent/CN107253789B/en active Active
- 2017-11-10 WO PCT/CN2017/110327 patent/WO2019029033A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105366836A (en) * | 2014-09-02 | 2016-03-02 | 苏州久沛环保科技有限公司 | Process and device for circulating multi-dimensional catalyzing advanced oxidation treatment of oily wastewater |
| CN104386868A (en) * | 2014-10-24 | 2015-03-04 | 苏州富奇诺水治理设备有限公司 | Method for treating waste water through Fenton oxidation by utilizing ultrasonic catalysis |
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| WO2019029033A1 (en) | 2019-02-14 |
| CN107253789A (en) | 2017-10-17 |
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