CN111606513A - Method for treating high-COD high-concentration sulfate radical acidic organic chemical wastewater - Google Patents
Method for treating high-COD high-concentration sulfate radical acidic organic chemical wastewater Download PDFInfo
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- CN111606513A CN111606513A CN202010472533.5A CN202010472533A CN111606513A CN 111606513 A CN111606513 A CN 111606513A CN 202010472533 A CN202010472533 A CN 202010472533A CN 111606513 A CN111606513 A CN 111606513A
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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
- C02F1/28—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
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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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
- C02F7/00—Aeration of stretches of water
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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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention provides a method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater, which is reasonable in design, wherein a first water tank is arranged in front of an adjusting tank for dilution treatment, coal powder is added for coagulation and adsorption, 90% of COD in the wastewater is removed, the rest COD is removed through aerobic treatment, the cost is greatly reduced, and the adsorbed coal powder can be used for combustion, has no secondary pollution, and is more economical and practical; after the wastewater is adsorbed in the first water tank, the damage of the water pump can be reduced; two sedimentation tanks are arranged in front of and behind the aerobic treatment tank, so that the wastewater treatment efficiency is improved.
Description
Technical Field
The invention mainly relates to the technical field of wastewater treatment, and particularly relates to a method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater.
Background
Due to the development of science and technology and the acceleration of the industrialization process, high COD and high salt wastewater is generated in the fields of chemical industry, printing and dyeing, marine product processing, mineral exploitation, pesticides, paper making, oil extraction and the like, wherein the wastewater not only contains high-concentration inorganic ions such as Cl-, Na +, SO 42-, K +, Ca2+, Mg2+ and the like, but also contains a large amount of organic pollutants, and if the wastewater is directly discharged into soil or water, plants in the soil die due to dehydration, and a large amount of plants such as algae in the water are propagated to finally cause eutrophication; organic pollutants further accelerate the deterioration of soil or water. Therefore, the treatment technology of the organic wastewater with high COD and high salt is more critical, and the organic wastewater can be discharged after reaching the national discharge standard.
Application No. 201610311684.6 discloses a high COD, high concentration organic salt acidic organic chemical wastewater treatment method using anaerobic plus aerobic treatment to reduce COD in the wastewater, but this method is longer in treatment time and higher in cost.
Disclosure of Invention
Solves the technical problem
The invention mainly provides a method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater, which is used for solving the technical problems that the COD in the wastewater is reduced by using anaerobic treatment and aerobic treatment in the prior art, but the method has longer treatment time and higher cost.
Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater comprises the following steps:
step 1, coagulation and adsorption treatment, namely diluting wastewater in a first water tank, adding coal powder, and stirring to finish coagulation and adsorption;
step 2, enabling the wastewater discharged from the first water tank to flow into a regulating tank, and aerating the regulating tank;
step 3, enabling the wastewater discharged from the regulating tank to flow into a neutralization tank, adding lime milk for neutralization, regulating the pH value of the wastewater, and simultaneously carrying out aeration treatment;
step 4, enabling water discharged from the neutralization tank to flow into a first sedimentation tank for primary sedimentation;
step 5, enabling the supernatant of the first sedimentation tank to flow into an aerobic reaction tank for aerobic treatment;
and 6, sending the supernatant of the aerobic reaction tank into a second sedimentation tank for sedimentation, and finally discharging supernatant water after the sedimentation is finished.
Further, in the step 1, a part of coal powder is added for preliminary coagulation, after the preliminary coagulation is completed, Fenton reagent is added into the dilution water tank for catalytic oxidation and acidic coagulation, and then the coal powder is added for stirring, so that the coagulation and the adsorption are finally completed.
Further, the coal powder added in the step 1 is adsorbed to form a coal powder mixture, the coal powder mixture is discharged and dried and molded, and the prepared coal briquette is used for combustion.
Further, the volume ratio of aeration quantity to water in the step 2 and the step 3 is (1-8): 1.
further, in the step 5, a nitrogen and phosphorus source is added into the aerobic reaction tank, a flora is added for aerobic treatment, sedimentation is carried out for 24 hours after aeration and stirring, and the upper clear water is discharged into the first sedimentation tank for secondary sedimentation.
Further, in the step 4 and the step 6, the water body is naturally layered after precipitation, clear water is discharged from the upper layer, sludge slurry is discharged from the lower layer, and the sludge slurry in the lower layer is sent into a drying device by a sludge scraper and a sludge pump for drying treatment.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention has reasonable design, 90 percent of COD in the wastewater is removed by arranging the first water tank in front of the regulating tank for dilution treatment and adding the pulverized coal for coagulation and adsorption, and the rest of COD is removed by aerobic treatment, thereby greatly reducing the cost, and the adsorbed pulverized coal can be used for combustion, has no secondary pollution and is more economical and practical; after the wastewater is adsorbed in the first water tank, the damage of the water pump can be reduced; two sedimentation tanks are arranged in front of and behind the aerobic treatment tank, so that the wastewater treatment efficiency is improved.
Detailed Description
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is provided for disclosure.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Examples
A method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater is characterized by comprising the following steps: the method comprises the following steps:
step 1, coagulation and adsorption treatment, namely diluting wastewater in a first water tank, adding coal powder for stirring, adding a part of coal powder for preliminary coagulation, adding a Fenton reagent for catalytic oxidation and acidic coagulation into the dilution water tank after the preliminary coagulation is finished, adding the coal powder for stirring, finally finishing coagulation and adsorption, forming a coal powder mixture after the coal powder is adsorbed, discharging the coal powder mixture for drying and molding treatment, and using the prepared coal briquette for combustion;
step 2, enabling the wastewater discharged from the first water tank to flow into a regulating tank, and aerating the regulating tank, wherein the volume ratio of aeration quantity to water is (1-8): 1;
and 3, enabling the wastewater discharged from the regulating tank to flow into a neutralization tank, adding lime milk for neutralization, regulating the pH value of the wastewater, and simultaneously performing aeration treatment, wherein the volume ratio of aeration quantity to water is (1-8): 1;
step 4, enabling water discharged from the neutralization tank to flow into a first sedimentation tank for primary sedimentation;
step 5, enabling the supernatant of the first sedimentation tank to flow into an aerobic reaction tank for aerobic treatment, adding a nitrogen and phosphorus source into the aerobic reaction tank, adding a flora for aerobic treatment, performing sedimentation for 24 hours after aeration and stirring, and discharging the upper clear water into the first sedimentation tank for secondary sedimentation;
and 6, sending the supernatant of the aerobic reaction tank into a second sedimentation tank for sedimentation, and finally discharging supernatant water after the sedimentation is finished.
In the step 4 and the step 6, the water body is naturally layered after precipitation, clear water is discharged from the upper layer, sludge slurry is discharged from the lower layer, and the sludge slurry at the lower layer is sent into a drying device by a sludge scraper and a sludge pump for drying treatment.
In conclusion, the invention has reasonable design, 90% of COD in the wastewater is removed by arranging the first water tank in front of the regulating tank for dilution treatment and adding the pulverized coal for coagulation and adsorption, and the rest COD is removed by aerobic treatment, so that the cost is greatly reduced, and the adsorbed pulverized coal can be used for combustion, has no secondary pollution and is more economical and practical; after the wastewater is adsorbed in the first water tank, the damage of the water pump can be reduced; two sedimentation tanks are arranged in front of and behind the aerobic treatment tank, so that the wastewater treatment efficiency is improved.
The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A method for treating high-COD and high-concentration sulfate radical acidic organic chemical wastewater is characterized by comprising the following steps: the method comprises the following steps:
step 1, coagulation and adsorption treatment, namely diluting wastewater in a first water tank, adding coal powder, and stirring to finish coagulation and adsorption;
step 2, enabling the wastewater discharged from the first water tank to flow into a regulating tank, and aerating the regulating tank;
step 3, enabling the wastewater discharged from the regulating tank to flow into a neutralization tank, adding lime milk for neutralization, regulating the pH value of the wastewater, and simultaneously carrying out aeration treatment;
step 4, enabling water discharged from the neutralization tank to flow into a first sedimentation tank for primary sedimentation;
step 5, enabling the supernatant of the first sedimentation tank to flow into an aerobic reaction tank for aerobic treatment;
and 6, sending the supernatant of the aerobic reaction tank into a second sedimentation tank for sedimentation, and finally discharging supernatant water after the sedimentation is finished.
2. The method for treating the high-COD high-concentration sulfate acid organic chemical wastewater according to claim 1, which is characterized in that: in the step 1, a part of coal powder is added for preliminary coagulation, after the preliminary coagulation is completed, Fenton reagent is added into a dilution water tank for catalytic oxidation and acidic coagulation, and then the coal powder is added for stirring, so that the coagulation and the adsorption are finally completed.
3. The method for treating the high-COD high-concentration sulfate acid organic chemical wastewater according to claim 2, which is characterized in that: and (2) adsorbing the coal powder added in the step (1) to form a coal powder mixture, discharging the coal powder mixture, drying and forming, and using the prepared coal briquette for combustion.
4. The method for treating the high-COD high-concentration sulfate acid organic chemical wastewater according to claim 1, which is characterized in that: the volume ratio of aeration quantity to water in the step 2 and the step 3 is (1-8): 1.
5. the method for treating the high-COD high-concentration sulfate acid organic chemical wastewater according to claim 1, which is characterized in that: in the step 5, a nitrogen and phosphorus source is added into the aerobic reaction tank, a flora is added for aerobic treatment, sedimentation is carried out for 24 hours after aeration and stirring, and the upper clear water is discharged into the first sedimentation tank for secondary sedimentation.
6. The method for treating the high-COD high-concentration sulfate acid organic chemical wastewater according to claim 1, which is characterized in that: in the step 4 and the step 6, the water body is naturally layered after precipitation, clear water is discharged from the upper layer, sludge slurry is discharged from the lower layer, and the sludge slurry at the lower layer is sent into a drying device by a sludge scraper and a sludge pump for drying treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010472533.5A CN111606513A (en) | 2020-05-29 | 2020-05-29 | Method for treating high-COD high-concentration sulfate radical acidic organic chemical wastewater |
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| CN202010472533.5A CN111606513A (en) | 2020-05-29 | 2020-05-29 | Method for treating high-COD high-concentration sulfate radical acidic organic chemical wastewater |
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Citations (9)
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|---|---|---|---|---|
| US4483772A (en) * | 1980-09-25 | 1984-11-20 | Metallgesellschaft Ag | Process for treating aqueous effluents |
| CN101838083A (en) * | 2010-05-17 | 2010-09-22 | 浙江大学 | Method for treating organic chemical wastewater having high COD and high concentration of sulfate ions |
| CN102260009A (en) * | 2010-05-29 | 2011-11-30 | 厦门理工学院 | Method for processing dye wastewater |
| CN105859034A (en) * | 2016-05-12 | 2016-08-17 | 杭州秀川科技有限公司 | Method for treating high-COD and high-concentration organic salt acid organic chemical wastewater |
| CN106746228A (en) * | 2016-12-28 | 2017-05-31 | 云南昆钢水净化科技有限公司 | A kind of processing method of acidic mine waste water |
| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
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| CN108773982A (en) * | 2018-07-02 | 2018-11-09 | 武汉科技大学 | A kind of processing method of high-concentration waste water |
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-
2020
- 2020-05-29 CN CN202010472533.5A patent/CN111606513A/en active Pending
Patent Citations (9)
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| CN101838083A (en) * | 2010-05-17 | 2010-09-22 | 浙江大学 | Method for treating organic chemical wastewater having high COD and high concentration of sulfate ions |
| CN102260009A (en) * | 2010-05-29 | 2011-11-30 | 厦门理工学院 | Method for processing dye wastewater |
| CN105859034A (en) * | 2016-05-12 | 2016-08-17 | 杭州秀川科技有限公司 | Method for treating high-COD and high-concentration organic salt acid organic chemical wastewater |
| CN106746228A (en) * | 2016-12-28 | 2017-05-31 | 云南昆钢水净化科技有限公司 | A kind of processing method of acidic mine waste water |
| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
| CN107601779A (en) * | 2017-10-27 | 2018-01-19 | 紫金矿业集团股份有限公司 | Copper-containing acid waste water of mine processing and the method and device of recycling |
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Application publication date: 20200901 |