CN111672471A - Biological activated carbon capable of improving COD removal efficiency and preparation method and application thereof - Google Patents
Biological activated carbon capable of improving COD removal efficiency and preparation method and application thereof Download PDFInfo
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- CN111672471A CN111672471A CN202010576431.8A CN202010576431A CN111672471A CN 111672471 A CN111672471 A CN 111672471A CN 202010576431 A CN202010576431 A CN 202010576431A CN 111672471 A CN111672471 A CN 111672471A
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- activated carbon
- sophorolipid
- rhamnolipid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The invention belongs to the field of environmental protection, and particularly relates to biological activated carbon capable of improving COD removal efficiency, a preparation method and application thereof, wherein the biological activated carbon comprises the following components in parts by weight: 30-60 parts of activated carbon; 10-20 parts of rhamnolipid; 5-20 parts of sophorolipid; 0-10 parts of urea; 0-5 parts of potassium phosphate. The invention utilizes the amphiphilicity of the sophorolipid and the rhamnolipid, the adsorption effect of the active carbon on hydrophobic organic matters and the interaction of hydrophilic groups of membrane phospholipid outside cells to enable the hydrophobic organic matters to be close to and enter the cells, thereby realizing the biological utilization of the organic matters.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to biological activated carbon capable of improving COD removal efficiency, and a preparation method and application thereof.
Background
With the continuous development of biotechnology, the technology has been widely applied to various aspects of production and life of people. The activated carbon is used as a traditional adsorbing material and is gradually mastered and utilized by people for a long time. After biochemical treatment in the field of environment-friendly waste gas and waste water treatment, part of difficultly biodegradable and soluble organic matters can be remained. At present, two processes of advanced oxidation or activated carbon adsorption are generally adopted for the part of the organic matters which are difficult to degrade and soluble biologically. The advanced oxidation process needs to add structures, and the process control is fine; the COD removal range of the activated carbon adsorption process is narrow, the COD removal efficiency is influenced, a new separation facility is required, and the physicochemical sludge is added. In conclusion, the investment cost and the operation cost of the two processes are greatly increased. The reason why the remaining refractory and soluble organic substances cannot be biologically used is that: this fraction of organic matter is not bioavailable or does not approach and enter biological cells well for reasons of hydrophobicity.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides the biological activated carbon which utilizes the amphiphilicity of the sophorolipid and the rhamnolipid, the adsorption effect of the activated carbon on hydrophobic organic matters and the interaction of hydrophilic groups of membrane phospholipids on the outer sides of cells to enable the hydrophobic organic matters to be close to and enter the cells, so that the organic matters are biologically utilized, the biological activated carbon is added to a biological section of a biological pool in use, no new treatment facility is required, the investment is low, the operation cost is lower than that of two processes of high-level oxidation or activated carbon adsorption, and the COD removal efficiency can be improved, and the preparation method and the application thereof.
The technical scheme of the invention is as follows: the biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by mass:
30-60 parts of activated carbon;
10-20 parts of rhamnolipid;
5-20 parts of sophorolipid;
0-10 parts of urea;
0-5 parts of potassium phosphate.
Preferably, the purity of the rhamnolipid is more than or equal to 95 percent; the purity of sophorolipid is more than or equal to 50 percent; the methylene blue of the activated carbon is more than or equal to 15ml/0.1g, the caramel value is more than or equal to 100 percent, and the mesh number is more than or equal to 200 meshes; the urea is industrial grade urea; the potassium phosphate is industrial-grade potassium phosphate.
Preferably, the biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by weight:
50 parts of activated carbon;
20 parts of rhamnolipid;
15 parts of sophorolipid;
0 part of urea;
4 parts of potassium phosphate.
Preferably, the biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by weight:
60 parts of activated carbon;
20 parts of rhamnolipid;
5 parts of sophorolipid;
6 parts of urea;
4 parts of potassium phosphate.
Preferably, the biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by weight:
30 parts of activated carbon;
10 parts of rhamnolipid;
20 parts of sophorolipid;
10 parts of urea;
0 part of potassium phosphate.
A preparation method of biological activated carbon capable of improving COD removal efficiency comprises the following steps:
1) adding water into rhamnolipid, sophorolipid, potassium phosphate and urea, or rhamnolipid, sophorolipid and potassium phosphate, or rhamnolipid, sophorolipid and urea, or rhamnolipid and sophorolipid to prepare 10% -20% solution;
2) then adding activated carbon according to a certain proportion and stirring for 30-60 minutes;
3) finally, spray drying to obtain a finished product.
Preferably, the water added in the step 1) is tap water, the concentration of the obtained solution is 15%, and the stirring time in the step 2) is 50 minutes.
Preferably, the temperature of the drying air for spray drying in the step 3) is 90-100 ℃, and the water content is less than 30%.
The application of biological activated carbon capable of improving COD removal efficiency is that 10-20mg/LCOD can be removed by every 20mg/L of biological activated carbon.
The invention utilizes the amphiphilicity of the sophorolipid and the rhamnolipid, the adsorption effect of the active carbon on hydrophobic organic matters and the interaction of hydrophilic groups of membrane phospholipid outside cells to enable the hydrophobic organic matters to be close to and enter the cells, thereby realizing the biological utilization of the organic matters.
Detailed Description
The present invention is further illustrated in detail by the following examples, which are not intended to limit the scope of the invention.
Example 1
The biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by mass: 50 parts of activated carbon; 20 parts of rhamnolipid; 15 parts of sophorolipid; 0 part of urea; 4 parts of potassium phosphate. Wherein the purity of the rhamnolipid is more than or equal to 95 percent; the purity of sophorolipid is more than or equal to 50 percent; the methylene blue of the activated carbon is more than or equal to 15ml/0.1g, the caramel value is more than or equal to 100 percent, and the mesh number is more than or equal to 200 meshes; the urea is industrial grade urea; the potassium phosphate is industrial-grade potassium phosphate.
The preparation method of the biological activated carbon comprises the following steps: adding water into rhamnolipid, sophorolipid and potassium phosphate according to a certain proportion to prepare a 10-20% solution; then adding activated carbon according to a certain proportion and stirring for 30-60 minutes; finally, spray drying to obtain a finished product. Wherein the added water is tap water. The temperature of the drying air for spray drying is 90-100 ℃, and the water content is less than 30%.
The biological activated carbon is applied to a sewage treatment plant (chemical wastewater) in an industrial park of Jiangsu
The sewage of enterprises (mainly chemical enterprises) in the industrial park is pretreated and then discharged to a park sewage treatment plant, and the COD of the park sewage treatment plant is treated to 50mg/L for discharge. The proportion of the organic matters which are difficult to be degraded and dissolved by organisms in the water body received by the sewage treatment plant in the park is higher, and the biochemistry is difficult. 200ppm of activated carbon is added into the effluent of the early-stage biological tank and is discharged out after COD is less than 50mg/L after the separation by a three-sedimentation tank. After adding the biological activated carbon, the water inlet and outlet data of the biological tank are as follows:
| amount of addition | COD of inlet water | COD of effluent |
| 0 | 220.9mg/L | 75.33mg/L |
| 20ppm | 220.9mg/L | 56.78mg/L |
The analysis of the data can obtain that the effluent data of the biological tank after adding the biological activated carbon is obviously lower than that of the biological activated carbon which is not added. According to theoretical data and practical experience, 20mg/L of activated carbon can adsorb about 4-6 mg/LCOD. Therefore, the removal efficiency of the refractory soluble organic matters can be improved by adding the biological activated carbon. The subsequent processing cost is greatly reduced.
Example 2
The biological activated carbon capable of improving the removal efficiency of COD comprises the following components in parts by mass: 60 parts of activated carbon; 20 parts of rhamnolipid; 5 parts of sophorolipid; 6 parts of urea; 4 parts of potassium phosphate. Wherein the purity of the rhamnolipid is more than or equal to 95 percent; the purity of sophorolipid is more than or equal to 50 percent; the methylene blue of the activated carbon is more than or equal to 15ml/0.1g, the caramel value is more than or equal to 100 percent, and the mesh number is more than or equal to 200 meshes; the urea is industrial grade urea; the potassium phosphate is industrial-grade potassium phosphate.
The preparation method of the biological activated carbon comprises the following steps: adding water into rhamnolipid, sophorolipid and potassium phosphate according to a certain proportion to prepare a 10-20% solution; then adding activated carbon according to a certain proportion and stirring for 30-60 minutes; finally, spray drying to obtain a finished product. Wherein the added water is tap water. The temperature of the drying air for spray drying is 90-100 ℃, and the water content is less than 30%.
The biological activated carbon is applied to a sewage treatment plant (printing and dyeing wastewater) in a certain Shaoxing printing and dyeing park;
and sewage of enterprises (mainly textile printing and dyeing enterprises) in the printing and dyeing park is pretreated and then discharged to a printing and dyeing park sewage treatment plant, and COD (chemical oxygen demand) of the printing and dyeing park sewage treatment plant is treated to be discharged (discharged to the sea) at a rate of 80 mg/L. The organic matter which is difficult to degrade and soluble biologically in the water body received by the sewage treatment plant in the printing and dyeing park has higher proportion, high conductivity and difficult biochemistry. In order to deal with the increase of the discharge standard (the COD discharge standard is increased to 50mg/L), the COD concentration of effluent water of the biological pond is controlled.
Adding 100ppm of active carbon into the effluent of the early-stage biological tank, adding 150ppm of active carbon into the effluent of the biological tank, separating the effluent by using a three-precipitation tank, and discharging COD (chemical oxygen demand) which is less than 50 mg/L. After adding the biological activated carbon, the water inlet and outlet data of the biological tank are as follows:
| amount of addition | COD of inlet water | COD of effluent |
| 0 | 1030mg/L | 96.78mg/L |
| 30ppm | 1030mg/L | 69.20mg/L |
The analysis of the data can obtain that the effluent data of the biological tank after adding the biological activated carbon is obviously lower than that of the biological activated carbon which is not added. According to theoretical data and practical experience, 20mg/L of activated carbon can adsorb about 4-6 mg/LCOD. Therefore, the removal efficiency of the refractory soluble organic matters can be improved by adding the biological activated carbon. And the subsequent treatment process is combined to meet the emission requirement, and the treatment cost is greatly reduced.
Claims (9)
1. The utility model provides a can improve biological activity charcoal that COD got rid of efficiency which characterized in that: the weight portions of the components are as follows:
30-60 parts of activated carbon;
10-20 parts of rhamnolipid;
5-20 parts of sophorolipid;
0-10 parts of urea;
0-5 parts of potassium phosphate.
2. The biological activated carbon capable of improving COD removal efficiency according to claim 1, which is characterized in that: wherein the purity of the rhamnolipid is more than or equal to 95 percent; the purity of sophorolipid is more than or equal to 50 percent;
the methylene blue of the activated carbon is more than or equal to 15ml/0.1g, the caramel value is more than or equal to 100 percent, and the mesh number is more than or equal to 200 meshes;
the urea is industrial grade urea; the potassium phosphate is industrial-grade potassium phosphate.
3. The biological activated carbon capable of improving COD removal efficiency according to claim 2, which is characterized in that: the weight portions of the components are as follows:
50 parts of activated carbon;
20 parts of rhamnolipid;
15 parts of sophorolipid;
0 part of urea;
4 parts of potassium phosphate.
4. The biological activated carbon capable of improving COD removal efficiency according to claim 2, which is characterized in that: the weight portions of the components are as follows:
60 parts of activated carbon;
20 parts of rhamnolipid;
5 parts of sophorolipid;
6 parts of urea;
4 parts of potassium phosphate.
5. The biological activated carbon capable of improving COD removal efficiency according to claim 2, which is characterized in that: the weight portions of the components are as follows:
30 parts of activated carbon;
10 parts of rhamnolipid;
20 parts of sophorolipid;
10 parts of urea;
0 part of potassium phosphate.
6. The method for preparing biological activated carbon according to claim 1, which can improve COD removal efficiency, comprising the steps of: the method comprises the following steps:
1) adding water into rhamnolipid, sophorolipid, potassium phosphate and urea, or rhamnolipid, sophorolipid and potassium phosphate, or rhamnolipid, sophorolipid and urea, or rhamnolipid and sophorolipid to prepare 10% -20% solution;
2) then adding activated carbon according to a certain proportion and stirring for 30-60 minutes;
3) finally, spray drying to obtain a finished product.
7. The method for preparing biological activated carbon capable of improving COD removal efficiency according to claim 6, which is characterized in that: the water added in the step 1) is tap water, the concentration of the obtained solution is 15%, and the stirring time in the step 2) is 50 minutes.
8. The method for preparing biological activated carbon capable of improving COD removal efficiency according to claim 6, which is characterized in that: the temperature of the drying air for spray drying in the step 3) is 90-100 ℃, and the water content is less than 30%.
9. The use of the biological activated carbon according to claim 1 for improving COD removal efficiency, wherein: 10-20mg/LCOD can be removed by every 20mg/L of biological activated carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010576431.8A CN111672471A (en) | 2020-06-22 | 2020-06-22 | Biological activated carbon capable of improving COD removal efficiency and preparation method and application thereof |
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| CN202010576431.8A CN111672471A (en) | 2020-06-22 | 2020-06-22 | Biological activated carbon capable of improving COD removal efficiency and preparation method and application thereof |
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| CN109942080A (en) * | 2017-12-21 | 2019-06-28 | 中国石油化工股份有限公司 | It is a kind of promote anaerobic ammonia oxidizing bacteria denitrogenation composition and its application |
| CN111097787A (en) * | 2018-10-26 | 2020-05-05 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
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2020
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242256A (en) * | 1999-07-30 | 2000-01-26 | 无锡轻工大学 | Method for preparing glyceride type biological surfactant |
| CN102060350A (en) * | 2010-11-18 | 2011-05-18 | 中国海洋石油总公司 | Deep treatment process of oily wastewater |
| CN105505809A (en) * | 2015-07-21 | 2016-04-20 | 南开大学 | Microbial agent for cleaning oil extraction wastewater filtering membrane |
| CN105883978A (en) * | 2016-07-01 | 2016-08-24 | 厦门理工学院 | Biosurfactant and method of using biosurfactant to strengthen ultra-filtration treatment |
| CN108118021A (en) * | 2016-11-29 | 2018-06-05 | 中国石油化工股份有限公司 | Complete microbial growth promoters and its application of nitrifying process |
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Application publication date: 20200918 |