CN111847713A - Method for treating wastewater by combining floating coagulation and active carbon - Google Patents
Method for treating wastewater by combining floating coagulation and active carbon Download PDFInfo
- Publication number
- CN111847713A CN111847713A CN202010686614.5A CN202010686614A CN111847713A CN 111847713 A CN111847713 A CN 111847713A CN 202010686614 A CN202010686614 A CN 202010686614A CN 111847713 A CN111847713 A CN 111847713A
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- waste liquid
- coagulation
- filter cotton
- active carbon
- activated carbon
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F2101/30—Organic compounds
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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)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a method for treating wastewater by using floating coagulation and active carbon, belonging to the field of waste liquid treatment. The method for treating wastewater by using the floating coagulation and the activated carbon comprises the implementation process of floating a flocculating constituent obtained by coagulation to the surface of the waste liquid, and adsorbing the flocculating constituent and dissolved organic matters by using filter cotton wrapped with the activated carbon and arranged on the surface of the waste liquid. Compared with the active carbon composite method and the conventional coagulation method, the up-floating coagulation method has the advantages of low equipment investment, short treatment time and good effluent quality.
Description
Technical Field
The invention relates to a method for treating wastewater by using floating coagulation and active carbon, belonging to the field of wastewater treatment.
Background
The main equipment of the conventional coagulation method comprises a mixing tank and a reaction tank for completing the mixing reaction process of a coagulant and waste liquid, a settling tank for completing the separation of water and a flocculating constituent, and the like, and the equipment investment is large. And the wastewater treated by a single coagulation method often cannot meet the discharge requirement.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for treating wastewater by combining floating coagulation and activated carbon, which can save investment in equipment, construction and the like and has the advantages of short treatment time and capability of ensuring that the quality of effluent can meet the discharge requirement.
The technical scheme of the invention is as follows:
the invention provides a method for treating wastewater by combining floating coagulation and active carbon, which comprises the following steps: when the waste liquid is treated by the coagulation method, the filter cotton wrapped with the activated carbon is added into the waste liquid, and the filter cotton is suspended on the surface of the waste liquid.
The floating coagulation and active carbon compounding method is characterized in that when waste liquid is treated by a coagulation method, filter cotton wrapped with active carbon is arranged in a reaction tank used by the coagulation method, so that the filter cotton is suspended on the surface of the waste liquid. When the waste liquid is treated, the flocculating constituent obtained by coagulation floats to the surface of the waste liquid, the flocculating constituent is brought to the surface of the waste liquid and then is adhered by the filter cotton, the adhered flocculating constituent can adsorb organic matters such as suspended matters, colloid state and the like in water, and the activated carbon adsorbs dissolved organic matters in the water.
The floating coagulation method preferably enables the flocculated body obtained by coagulation to float to the surface of the waste liquid by stirring or air blowing.
Waste water forms vortex by stirring or air blowing, after the vortex is formed, the flocculating constituent is brought to the surface of the waste water and then is adhered by the filter cotton, and the adhered flocculating constituent can adsorb suspended matters, colloid state and other organic matters in water. The dissolved organic matters in the water are continuously contacted with the active carbon under the drive of the vortex, thereby improving the removal rate.
Preferably, the filter cotton is activated carbon fiber filter cotton, glass fiber filter cotton or synthetic fiber filter cotton; the active carbon is columnar active carbon.
The filter cotton has the function of adsorbing flocculating constituents and can be commercially purchased. The active carbon has the function of adsorbing dissolved organic matters and can be purchased commercially.
The invention has the beneficial effects that:
1) the water treatment method combining floating coagulation and active carbon can ensure that the effluent quality can meet the discharge requirement after the wastewater is treated by one step;
2) the time for treating wastewater by the floating coagulation and activated carbon composite method is shorter than that by the conventional coagulation method;
3) the sedimentation tank for separating the flocculating constituent from the waste liquid can be avoided, and the equipment investment is reduced;
4) the adhered flocculating constituent and the filter cotton have a synergistic effect, the polyaluminium sulfate flocculating agent with the same amount is used for treating the surfactant wastewater with the same volume and concentration, the effect of the floating coagulation method is better than that of the conventional coagulation method, and meanwhile, the filter cotton can prevent the flocculating constituent from contacting with the active carbon, so that the service life of the active carbon is prolonged.
Detailed Description
The reagents and materials are commercially available.
The activated carbon described in the examples below was purchased from Honghen environmental protection technologies, Beijing, Henan, coal-based columnar activated carbon, model MY.
The activated carbon fiber filter cotton described in the examples below was purchased from Honda air filtration material, Inc., Guangzhou, under the product designation hd-6.
The synthetic fiber filter cotton described in the examples below was purchased from Shanghai Olympic industries, Inc., product number BZ 004. The amount of activated carbon used in the following examples was determined based on the actual water quality of the wastewater.
Example 1
500mL of Dalian oil refinery wastewater with COD of 830mg/L is taken, the pH value is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed uniformly, after a flocculating constituent is generated, the filter cotton of hd-6 activated carbon fiber wrapping 10g of columnar activated carbon is added and suspended on the water surface, a stirrer is started, after 10min, the water body is clarified from turbid, and sampling is carried out for 40min, and the COD is measured to be 51.3 mg/L.
Example 2
500mL of waste water of a major oil refinery with the COD of 917mg/L is taken, the pH value is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed uniformly, after a flocculating constituent is generated, a BZ004 activated carbon fiber filter cotton wrapping 10g of columnar activated carbon is added and suspended on the water surface, a stirrer is started, after 10min, the water body is clarified from turbidity, and after 40min, a sample is taken, and the COD is measured to be 60.1 mg/L.
Example 3
500mL of student dormitory domestic sewage of the university of maritime with the COD of 762mg/L is taken, the pH value is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed uniformly, after a flocculating constituent is generated, the filter cotton which is made of hd-6 glass fiber and is wrapped by 10g of columnar activated carbon is added and suspended on the water surface, a stirrer is started, the water body is clarified from turbidity after 10min, and the COD is 53.7mg/L measured by sampling for 40 min.
Example 4
500mL of student dormitory domestic sewage of university of maritime with COD of 682mg/L is taken, pH is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed uniformly, after a flocculating constituent is generated, BZ004 synthetic fiber filter cotton wrapping 10g of columnar activated carbon is added and suspended on the water surface, a stirrer is started, the water body is clarified from turbidity after 10min, and COD is measured to be 59.8mg/L by sampling for 40 min.
Comparative example 1
500mL of student dormitory domestic sewage of the university of maritime with COD of 682mg/L is taken, the pH value is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed evenly, the mixture is stirred for 10min, is kept stand and settled, and the COD is measured to be 356.3mg/L by sampling for 40 min.
Comparative example 2
500mL of student dormitory domestic sewage of university of maritime with COD of 682mg/L is taken, the pH value is adjusted to 7.0, 0.3g of polyaluminium sulfate is added and mixed evenly, after a flocculating constituent is generated, BZ004 synthetic fiber filter cotton is added and suspended on the water surface, a stirrer is started, and sampling is carried out for 40min to determine that the COD is 324.7 mg/L.
Comparative example 3
500mL of student dormitory domestic sewage of the university of maritime with COD of 682mg/L is taken, the pH value is adjusted to 7.0, 10g of BZ004 of columnar activated carbon is added, a stirrer is started, and sampling is carried out for 40min to determine that the COD is 71.6 mg/L.
Claims (5)
1. A method for treating waste liquid, characterized in that the method comprises: when the waste liquid is treated by a coagulation method, filter cotton wrapped with activated carbon is added into the waste liquid, so that the filter cotton is fixed and suspended on the surface of the waste liquid; in the process of treating the waste liquid, firstly, flocculating constituents obtained by coagulation float to the surface of the waste liquid, and then the flocculating constituents and pollutants in water are adsorbed by using filter cotton wrapped with active carbon on the surface of the waste liquid.
2. The method of claim 1, wherein: the flocculating constituent adhered to the filtered cotton is used for adsorbing suspended matters and colloidal organic matters in water; the active carbon adsorbs dissolved organic matters in water.
3. The method of claim 1, wherein: the flocculating constituent obtained by coagulation floats to the surface of the waste liquid by stirring or air blowing.
4. The method of claim 1, wherein: the filter cotton is activated carbon fiber filter cotton, glass fiber filter cotton or synthetic fiber filter cotton.
5. The method of claim 1, wherein: the active carbon is columnar active carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686614.5A CN111847713A (en) | 2020-07-16 | 2020-07-16 | Method for treating wastewater by combining floating coagulation and active carbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686614.5A CN111847713A (en) | 2020-07-16 | 2020-07-16 | Method for treating wastewater by combining floating coagulation and active carbon |
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| CN111847713A true CN111847713A (en) | 2020-10-30 |
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| CN202010686614.5A Pending CN111847713A (en) | 2020-07-16 | 2020-07-16 | Method for treating wastewater by combining floating coagulation and active carbon |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0169430A2 (en) * | 1984-07-23 | 1986-01-29 | Vladislav Dr. Dipl.-Ing. Smolcic | Process for the clarification of coloured waste water |
| CN104108775A (en) * | 2014-07-10 | 2014-10-22 | 杭州电子科技大学 | Composite reagent for treating recycled water of printing and dyeing wastewater and application method of composite reagent |
| CN204522402U (en) * | 2015-03-09 | 2015-08-05 | 江苏科净炭纤维有限公司 | A kind of water treatment facilities special activated carbon fiber filter core |
| CN106045117A (en) * | 2016-07-12 | 2016-10-26 | 大连海事大学 | Method for treating waste liquor with floating coagulation method |
-
2020
- 2020-07-16 CN CN202010686614.5A patent/CN111847713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0169430A2 (en) * | 1984-07-23 | 1986-01-29 | Vladislav Dr. Dipl.-Ing. Smolcic | Process for the clarification of coloured waste water |
| CN104108775A (en) * | 2014-07-10 | 2014-10-22 | 杭州电子科技大学 | Composite reagent for treating recycled water of printing and dyeing wastewater and application method of composite reagent |
| CN204522402U (en) * | 2015-03-09 | 2015-08-05 | 江苏科净炭纤维有限公司 | A kind of water treatment facilities special activated carbon fiber filter core |
| CN106045117A (en) * | 2016-07-12 | 2016-10-26 | 大连海事大学 | Method for treating waste liquor with floating coagulation method |
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