CN113856651B - Activated carbon adsorbent and preparation method thereof - Google Patents
Activated carbon adsorbent and preparation method thereof Download PDFInfo
- Publication number
- CN113856651B CN113856651B CN202111236222.XA CN202111236222A CN113856651B CN 113856651 B CN113856651 B CN 113856651B CN 202111236222 A CN202111236222 A CN 202111236222A CN 113856651 B CN113856651 B CN 113856651B
- Authority
- CN
- China
- Prior art keywords
- activated carbon
- hydrophilic porous
- porous carrier
- prepared
- carbon adsorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 323
- 239000003463 adsorbent Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229920002635 polyurethane Polymers 0.000 claims abstract description 48
- 239000004814 polyurethane Substances 0.000 claims abstract description 48
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 235000015097 nutrients Nutrition 0.000 claims abstract description 23
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 41
- 229910052760 oxygen Inorganic materials 0.000 claims description 41
- 239000001301 oxygen Substances 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 34
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 19
- 244000060011 Cocos nucifera Species 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 18
- 239000002202 Polyethylene glycol Substances 0.000 claims description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims description 16
- VHCKLBQLRHKFJW-UHFFFAOYSA-N 2,3,4-trifluoro-5-(1,1,2,2,3,3,4,4,4-nonafluorobutyl)furan Chemical compound FC=1OC(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)=C(F)C=1F VHCKLBQLRHKFJW-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- HDTRYLNUVZCQOY-UHFFFAOYSA-N α-D-glucopyranosyl-α-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OC1C(O)C(O)C(O)C(CO)O1 HDTRYLNUVZCQOY-UHFFFAOYSA-N 0.000 claims description 11
- HDTRYLNUVZCQOY-WSWWMNSNSA-N Trehalose Natural products O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-WSWWMNSNSA-N 0.000 claims description 11
- 239000001888 Peptone Substances 0.000 claims description 10
- 108010080698 Peptones Proteins 0.000 claims description 10
- HDTRYLNUVZCQOY-LIZSDCNHSA-N alpha,alpha-trehalose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-LIZSDCNHSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 10
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 10
- 235000019319 peptone Nutrition 0.000 claims description 10
- 229950008618 perfluamine Drugs 0.000 claims description 10
- JAJLKEVKNDUJBG-UHFFFAOYSA-N perfluorotripropylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)F JAJLKEVKNDUJBG-UHFFFAOYSA-N 0.000 claims description 10
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000000084 colloidal system Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 3
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 235000010413 sodium alginate Nutrition 0.000 claims description 2
- 229940005550 sodium alginate Drugs 0.000 claims description 2
- 239000000661 sodium alginate Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 71
- 230000000694 effects Effects 0.000 abstract description 43
- 238000001179 sorption measurement Methods 0.000 abstract description 23
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 239000012528 membrane Substances 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 50
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 48
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 25
- 229910052757 nitrogen Inorganic materials 0.000 description 25
- 229910052698 phosphorus Inorganic materials 0.000 description 25
- 239000011574 phosphorus Substances 0.000 description 25
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 24
- 229910052804 chromium Inorganic materials 0.000 description 24
- 239000011651 chromium Substances 0.000 description 24
- 229910052802 copper Inorganic materials 0.000 description 24
- 239000010949 copper Substances 0.000 description 24
- 229910052759 nickel Inorganic materials 0.000 description 24
- 239000010802 sludge Substances 0.000 description 17
- 239000003344 environmental pollutant Substances 0.000 description 14
- 231100000719 pollutant Toxicity 0.000 description 14
- 244000005700 microbiome Species 0.000 description 13
- 239000000126 substance Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000013329 compounding Methods 0.000 description 7
- 239000004912 1,5-cyclooctadiene Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011133 lead Substances 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 3
- 235000016709 nutrition Nutrition 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000002508 compound effect Effects 0.000 description 2
- -1 fluorocarbon compound Chemical class 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FCZCIXQGZOUIDN-UHFFFAOYSA-N ethyl 2-diethoxyphosphinothioyloxyacetate Chemical compound CCOC(=O)COP(=S)(OCC)OCC FCZCIXQGZOUIDN-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- RVZRBWKZFJCCIB-UHFFFAOYSA-N perfluorotributylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F RVZRBWKZFJCCIB-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 125000000647 trehalose group Chemical group 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- 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
-
- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The application relates to the technical field of sewage treatment, in particular to an activated carbon adsorbent and a preparation method thereof. An activated carbon adsorbent comprises the following components in percentage by weight: 15-35% of water-containing active carbon, 0.5-1.5% of hydrophilic porous carrier, 0.05-0.15% of nutrient and the balance of deionized water, wherein the hydrophilic porous carrier is prepared by modifying polyurethane by fluorocarbon. The hydrophilic porous carrier is added, so that the adsorption performance of the adsorbent is guaranteed, and meanwhile, the phenomenon of sedimentation and hardening of the activated carbon is remarkably improved; and the hydrophilic porous carrier can be used as a biological carrier, and after a nutrient is compounded, the combination of a biological membrane method and an active adsorption method can be realized, so that the adsorption effect is further enhanced.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to an activated carbon adsorbent and a preparation method thereof.
Background
Along with the rapid development of industrialization, water pollution is increasingly serious, the types and components of pollutants contained in water are also more complex and various, and the conventional secondary treatment method cannot meet the requirements, so that the sewage treatment is carried out by adopting an adsorption method, and the adsorption method gradually becomes a more common application technology in the field of wastewater treatment due to the advantages of high efficiency, economy, low energy consumption, simple treatment process and the like.
The adsorbent in the related art has the main components of powdered activated carbon, is wide in source, low in clean pollution, capable of effectively removing organic matters and the like in water, and has excellent popularity, and the mode of adding the activated carbon at the present stage is mainly divided into two modes: the dry-method addition and the wet-method addition take the wet-method addition with little pollution and no dust emission of the powdered activated carbon as an example, and refer to a method for adding the powdered activated carbon into a liquid preparation tank to prepare slurry in the form of slurry.
Although the wet method feeding mode obviously improves the dust rising phenomenon of the powdered activated carbon in the feeding process, dust pollution is not easy to cause, the activated carbon in the slurry fed by the wet method has the problems of easy sedimentation and hardening, and then the treatment pipeline is blocked, so that the adsorption effect is seriously affected. Therefore, there is an urgent need to develop an adsorbent capable of improving dust-raising phenomenon of powdered activated carbon and guaranteeing adsorption effect of powdered activated carbon.
Disclosure of Invention
In order to solve the technical problems, the application provides an activated carbon adsorbent and a preparation method thereof.
In a first aspect, the present application provides an activated carbon adsorbent, which adopts the following technical scheme:
an activated carbon adsorbent comprises the following components in percentage by weight: 15-35% of water-containing active carbon, 0.5-1.5% of hydrophilic porous carrier, 0.05-0.15% of nutrient and the balance of deionized water, wherein the hydrophilic porous carrier is prepared by modifying polyurethane by fluorocarbon.
By adopting the technical scheme, the hydrophilic porous carrier prepared by modifying polyurethane through fluorocarbon can be used as a microbial carrier besides playing the self adsorption function after being compounded with the water-containing activated carbon, and then a purification system combining a biomembrane method and an activated sludge method is formed.
In addition, the polyurethane modified by the fluorocarbon has better oxygen adsorption performance, can provide sufficient oxygen for adsorbed microorganisms, can fully ensure the living environment of the microorganisms when being combined with the nutrient, further endows the activated carbon adsorbent with better sewage treatment performance through the compounding of the three components, and the prepared activated carbon adsorbent has better stability, the activated carbon components of the activated carbon adsorbent are not easy to subside and harden, and the adsorption effect of the activated carbon adsorbent is ensured.
Preferably, in the preparation raw materials of the hydrophilic porous carrier, the weight ratio of polyurethane to fluorocarbon is 1: (0.18-0.30);
the fluorocarbon is one or more of perfluoro-n-butyl furan, perfluoro-tributylamine and perfluoro-tripropylamine.
By adopting the technical scheme, after the fluorocarbon compound with the components and the proportion is combined and modified with polyurethane, the hydrophilic porous carrier can be endowed with better oxygen adsorption performance and biological loading performance, and then after the hydrophilic porous carrier is compounded with the water-containing activated carbon, the sewage treatment effect of the activated carbon adsorbent can be obviously improved through the combination of a biomembrane method and an activated sludge method.
Preferably, the fluorocarbon is prepared from perfluoro-n-butyl furan and perfluoro-tripropylamine according to a weight ratio of 1: (1-1.5).
By adopting the technical scheme, the hydrophilic porous carrier prepared from the components and the fluorocarbon compound has better oxygen adsorption performance and biological load capacity, and then is compounded with the water-containing activated carbon for use, so that the hydrophilic porous carrier has better sewage treatment effect.
Preferably, the preparation method of the hydrophilic porous carrier comprises the following steps:
I. firstly, heating and melting polyurethane, then adding polyethylene glycol into polyurethane sol, and stirring and mixing under the condition of oxygen introduction to prepare premix;
II. Continuously introducing oxygen, adding fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring and mixing to obtain the hydrophilic porous carrier, and preserving heat for later use.
By adopting the technical scheme, the preparation process is simpler, various operation conditions are easy to control, hydrophilic porous carriers with stable and uniform performance can be prepared in a large scale, and after polyurethane is modified by fluorocarbon, the polyurethane has the advantages of high dissolved oxygen and high biological load, and the treatment effect of a biomembrane method part in the sewage treatment process is greatly improved.
Preferably, the specific preparation method of the hydrophilic porous carrier is as follows:
I. firstly, heating polyurethane to 180-200 ℃ to melt into colloid, and then adding polyethylene glycol with molecular weight not less than 2000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): (3-5) mixing, stirring and mixing for 30-60min at 500-800r/min under the condition of oxygen introduction, and preparing premix;
II. Continuously introducing oxygen, adding fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 15-20min at 4000-5000r/min to obtain the hydrophilic porous carrier, and preserving heat for later use.
By adopting the technical scheme, the process conditions are more accurate, and the prepared hydrophilic porous carrier has more stable performance, better oxygen adsorption and biological loading performance, and can obviously increase the sewage treatment effect of the activated carbon adsorbent when being compounded with the water-containing activated carbon to realize the combined use of a biomembrane method and an activated sludge method.
Preferably, the water-containing activated carbon is coconut shell activated carbon with the water content of 10-15%, and the particle size of the coconut shell activated carbon is 80-120 meshes.
By adopting the technical scheme, the active carbon adsorbent prepared from the water-containing active carbon has the optimal compounding effect with the hydrophilic porous carrier, and after the active carbon adsorbent and the hydrophilic porous carrier are combined, the active carbon adsorbent is difficult to harden and settle, and simultaneously can obtain a better sewage treatment effect through the combination of a biomembrane method and an active sludge method.
Preferably, the specific surface area of the coconut shell activated carbon is 1000-1600m 2 And/g, the micropore volume is not less than 90%.
By adopting the technical scheme, the activated carbon adsorbent prepared from the water-containing activated carbon is difficult to harden and settle, can be compounded with a hydrophilic porous carrier, and can be combined with an activated sludge method through a biomembrane method, so that the sewage treatment effect of the activated carbon adsorbent is remarkably improved.
Preferably, the nutrient is one or more of sodium alginate, potassium dihydrogen phosphate, trehalose and peptone.
By adopting the technical scheme, the nutrient of the components can realize the combined use of a biomembrane method and an activated sludge method by compounding with the hydrophilic porous carrier and the water-containing activated carbon, can provide sufficient nutrient substances for microorganisms, and further obtains a better sewage treatment effect.
Preferably, the nutrient is prepared from trehalose, peptone and potassium dihydrogen phosphate according to a weight ratio of 1: (0.5-0.8): (0.08-0.12).
By adopting the technical scheme, the nutrient prepared by the components and the proportion can provide a better living environment for microorganisms, and can be better compounded with the hydrophilic porous carrier and the water-containing activated carbon, so that a better sewage treatment effect is obtained.
In a second aspect, the present application provides a method for preparing an activated carbon adsorbent, which adopts the following technical scheme:
a method for preparing an activated carbon adsorbent, comprising the following steps:
s1, mixing a nutrient and deionized water to obtain a mixed solution A;
s2, mixing the water-containing activated carbon with a hydrophilic porous carrier to obtain a mixture B;
s3, mixing the mixed solution A with the mixed material B, wherein the mixing rate of the mixed material B is 30-90g/min according to the volume per liter of the mixed solution A, and the activated carbon adsorbent can be prepared.
By adopting the technical scheme, the process conditions are simpler, special processes such as heating are not needed, the production cost is lower, and various conditions are easy to control, so that the hydrophilic porous carrier with stable mass performance is easy to industrially produce, and the hydrophilic porous carrier is compounded with the water-containing activated carbon, so that the activated carbon adsorbent can be endowed with better oxygen adsorption and biological load performance, and the sewage treatment effect of the activated carbon adsorbent is improved.
In summary, the present application has the following beneficial effects:
1. the application obviously improves the sewage treatment effect of the activated carbon adsorbent through the addition of the hydrophilic porous carrier, and can be used as a microbial carrier besides playing the self adsorption effect after being compounded with the water-containing activated carbon, so that a purification system combining a biomembrane method and an activated sludge method is formed;
2. according to the preparation method, the polyurethane is modified, so that the hydrophilic porous carrier has the advantages of high dissolved oxygen and high biological load performance, microorganisms can be adsorbed, sufficient oxygen can be provided for the adsorbed microorganisms, and the adsorption effect of the activated carbon adsorbent is further ensured through the compounding of the nutritional agent;
3. the preparation method is simple, various operation conditions are easy to control, and the prepared activated carbon adsorbent is stable and uniform in performance and has better sewage treatment performance when being suitable for industrial production.
Detailed Description
The present application will be described in further detail with reference to examples, and raw materials used in each of examples and comparative examples of the present application are commercially available.
Preparation example
Preparation example 1
A hydrophilic porous carrier, which is prepared by the following steps:
I. firstly, heating 10kg of polyurethane to 170 ℃ to melt into colloid, and then adding polyethylene glycol with molecular weight of 1500 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): 2, mixing, namely stirring and mixing for 20min at the speed of 300r/min under the condition of introducing oxygen to prepare a premix;
II. Continuously introducing oxygen, doping fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 10min at 2000r/min to obtain a hydrophilic porous carrier, and preserving heat for later use;
the fluorocarbon is perfluoro-n-butyl furan, and the weight ratio of the perfluoro-n-butyl furan to the polyurethane is 0.12: 1.
Preparation example 2
A hydrophilic porous carrier is different from preparation example 1 in that the preparation method is as follows:
I. firstly, heating 10kg of polyurethane to 180 ℃ to melt into colloid, and then adding polyethylene glycol with the molecular weight of 2000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): 3, mixing, namely stirring and mixing for 30min at 500r/min under the condition of oxygen introduction to prepare a premix;
II. Continuously introducing oxygen, doping fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 15min at 4000r/min, and preparing the hydrophilic porous carrier under the same other conditions as in preparation example 1.
Preparation example 3
A hydrophilic porous carrier is different from preparation example 1 in that the preparation method is as follows:
I. firstly, heating 10kg of polyurethane to 190 ℃ to melt into colloid, and then adding polyethylene glycol with molecular weight of 4000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): 4, mixing, namely stirring and mixing for 45min at 650r/min under the condition of introducing oxygen to prepare a premix;
II. Continuously introducing oxygen, doping fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 20min at 4500r/min, and preparing hydrophilic porous carrier under the same other conditions as in preparation example 1.
Preparation example 4
A hydrophilic porous carrier is different from preparation example 1 in that the preparation method is as follows:
I. firstly, heating 10kg of polyurethane to 200 ℃ to melt into colloid, and then adding polyethylene glycol with molecular weight of 4000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): 5, mixing, namely stirring and mixing for 60 minutes at the speed of 800r/min under the condition of introducing oxygen to prepare a premix;
II. Continuously introducing oxygen, doping fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 20min at 4500r/min, and preparing hydrophilic porous carrier under the same other conditions as in preparation example 1.
Preparation example 5
A hydrophilic porous carrier is different from preparation example 1 in that the preparation method is as follows:
I. firstly, heating 10kg of polyurethane to 220 ℃ to melt into colloid, and then adding polyethylene glycol with the molecular weight of 6000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): 6, mixing, namely stirring and mixing for 60 minutes at the speed of 1000r/min under the condition of introducing oxygen to prepare a premix;
II. Continuously introducing oxygen, doping fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 30min at 6000r/min, and preparing the hydrophilic porous carrier under the same other conditions as in preparation example 1.
Preparation example 6
A hydrophilic porous support differs from preparation example 1 in that the polyurethane and fluorocarbon are present in addition to II in an amount of 1 by weight: the hydrophilic porous carrier can be prepared by mixing 0.18 under the same conditions as in preparation example 1.
Preparation example 7
A hydrophilic porous support differs from preparation example 1 in that the polyurethane and fluorocarbon are present in addition to II in an amount of 1 by weight: the hydrophilic porous carrier can be prepared by mixing 0.24 under the same conditions as in preparation example 1.
Preparation example 8
A hydrophilic porous support differs from preparation example 1 in that the polyurethane and fluorocarbon are present in addition to II in an amount of 1 by weight: the hydrophilic porous carrier can be prepared by mixing 0.30 and the other conditions are the same as in preparation example 1.
Preparation example 9
A hydrophilic porous support differs from preparation example 1 in that the polyurethane and fluorocarbon are present in addition to II in an amount of 1 by weight: the hydrophilic porous carrier can be prepared by mixing 0.36 under the same conditions as in preparation example 1.
Preparation example 10
A hydrophilic porous carrier is different from preparation example 1 in that fluorocarbon in removal II is prepared from perfluoro-n-butylfuran and perfluoro-tripropylamine according to a weight ratio of 1: the hydrophilic porous carrier can be prepared by the same conditions as in preparation example 1 except for 0.5.
PREPARATION EXAMPLE 11
A hydrophilic porous carrier is different from preparation example 1 in that fluorocarbon in removal II is prepared from perfluoro-n-butylfuran and perfluoro-tripropylamine according to a weight ratio of 1:1, and the other conditions are the same as those of preparation example 1, thus obtaining the hydrophilic porous carrier.
Preparation example 12
A hydrophilic porous carrier is different from preparation example 1 in that fluorocarbon in removal II is prepared from perfluoro-n-butylfuran and perfluoro-tripropylamine according to a weight ratio of 1:1.25, and the other conditions are the same as those of preparation example 1, thus obtaining the hydrophilic porous carrier.
Preparation example 13
A hydrophilic porous carrier is different from preparation example 1 in that fluorocarbon in removal II is prepared from perfluoro-n-butylfuran and perfluoro-tripropylamine according to a weight ratio of 1:1.5 except for the composition, the hydrophilic porous carrier can be prepared under the same conditions as in preparation example 1.
PREPARATION EXAMPLE 14
A hydrophilic porous carrier is different from preparation example 1 in that fluorocarbon in removal II is prepared from perfluoro-n-butylfuran and perfluoro-tripropylamine according to a weight ratio of 1:2, the hydrophilic porous carrier can be prepared by the same conditions as in preparation example 1.
Performance test
The activated carbon adsorbents obtained in the examples and the comparative examples are used for sewage treatment of urban sewage treatment plants, wherein the dosage of the activated carbon adsorbent is 1.5g/L, the dosage of activated sludge is 7.5g/L, and the volume index SVI of the sludge is 261ml/g;
the sewage before and after treatment is tested, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment are recorded in the following table, and specific detection standards and detection steps can be referred to GB 18918-2002 pollutant emission standards of urban sewage treatment plants.
Examples
Example 1
The active carbon adsorbent comprises the following components and the corresponding weights shown in table 1, and is prepared by the following preparation method:
s1, mixing a nutrient and deionized water according to the corresponding amount at 800r/min for 30min to obtain a mixed solution A;
the nutritional agent is trehalose;
s2, mixing the water-containing activated carbon with the hydrophilic porous carrier for 20min at 2500r/min according to the corresponding amount to obtain a mixture B;
the water-containing activated carbon is coconut shell activated carbon with the water content of 8%, and the particle size of the coconut shell activated carbon is 100 meshes;
the specific surface area of the coconut shell activated carbon is 1600m 2 Per g, micropore volume 90%;
hydrophilic porous carriers were prepared from preparation example 1;
s3, mixing the mixed solution A and the mixed material B for 60min at a rate of 300r/min, wherein the mixing rate of the mixed material B is 30-90g/min according to the volume per liter of the mixed solution A, and thus the activated carbon adsorbent can be prepared.
Examples 2 to 6
An activated carbon adsorbent is different from example 1 in that each component and its corresponding weight are shown in table 1.
Table 1: each component and the corresponding weight (kg) in examples 1 to 6
Comparative example 1
An activated carbon adsorbent was different from example 1 in that the composition was not provided with a hydrophilic porous support, and the conditions were the same as in example 1.
Comparative example 2
An activated carbon adsorbent was different from example 1 in that the conditions were the same as example 1 except that the hydrophilic porous support was polyurethane which was not modified with fluorocarbon.
The activated carbon adsorbents prepared in examples 1 to 6 and comparative examples 1 to 2 were extracted, and performance thereof was measured, and the contents of COD, pb, cr, ni, cu, total nitrogen, ammonia nitrogen and total phosphorus before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: as can be seen from the above table, the activated carbon adsorbents prepared in examples 1-6 can effectively remove pollutants in sewage to make the pollutants reach a secondary standard, and COD of the activated carbon adsorbent is only 79-84mg/L, which is reduced by 78-79% compared with untreated sewage; the lead content is 0.06-0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.06-0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 16.9-17.9mg/L, which is reduced by 64-66% compared with the sewage before the treatment; the ammonia nitrogen content is only 1.46-1.58mg/L, which is reduced by 96-97% compared with the sewage before the treatment, and the ammonia nitrogen content is obviously reduced; the total phosphorus is only 0.43-0.46mg/L.
Further, examples 3 and 4 are preferred examples, with COD of only 79-79.8mg/L; the lead content is 0.06mg/L; the chromium content is 0.06mg/L; the nickel content is 0.04mg/L; the copper content is 0.05mg/L; the total nitrogen content is only 16.9-17.1mg/L; the ammonia nitrogen content is only 1.46-1.47mg/L; the total phosphorus is only 0.43-0.44mg/L. The dosage of the water-containing activated carbon is 20-25kg, and the dosage ratio of the water-containing activated carbon to the hydrophilic porous carrier is 1 when the dosage of the hydrophilic porous carrier is 0.9-1.1 kg: (22.2-22.7), the water treatment effect is better, and the purification effect is better;
when the dosage of the water-containing activated carbon is 30-35kg and the dosage of the hydrophilic porous carrier is 1.3-1.5kg, namely the dosage ratio of the water-containing activated carbon to the hydrophilic porous carrier is increased to 1: (23.1-23.3), the purification effect is reduced slightly, see example 5 and example 6, and the analysis may be that the combination of the hydrophilic porous carrier and the aqueous activated carbon is supersaturated, the excessive hydrophilic porous carrier cannot be combined with the aqueous activated carbon any more, and only the discrete particles can be dissociated in the sewage to be treated to adsorb oxygen and microorganisms alone, so that the compound effect of the aqueous activated carbon is lacking, and the utilization efficiency of microorganisms is reduced under the condition that the total amount of microorganisms in the activated sludge is relatively fixed, thereby influencing the overall purification effect.
In particular, the activated carbon adsorbent prepared in example 3 has the best water treatment effect and has a COD of only 79mg/L; the lead content is 0.06mg/L; the chromium content is 0.06mg/L; the nickel content is 0.04mg/L; the copper content is 0.05mg/L; the total nitrogen content is only 16.9mg/L; the ammonia nitrogen content is only 1.46mg/L; its total phosphorus is only 0.43mg/L.
The reason for analysis is probably that the activated carbon adsorbent in the proportion can play the self adsorption function and can also be used as a microorganism carrier to form a purification system combining a biomembrane method and an activated sludge method; in addition, the polyurethane modified by the fluorocarbon has better oxygen adsorption performance, can provide sufficient oxygen for adsorbed microorganisms, further endows the activated carbon adsorbent with better sewage treatment performance, and the prepared activated carbon adsorbent has better stability, and the activated carbon component is not easy to subside and harden.
As can be seen from the table, compared with the example 1, the comparative example 1 adopts only activated carbon and sludge to treat sewage, is influenced by factors such as sedimentation and hardening of the activated carbon, greatly reduces the treatment effect, has COD of up to 114.6mg/L and improves the treatment effect by 36% compared with the example 1; the lead content is up to 0.10mg/L; the chromium content is up to 0.09mg/L; the nickel content is up to 0.05mg/L; the copper content is up to 0.22mg/L; the total nitrogen content is up to 28.0mg/L, which is improved by 56% compared with the embodiment 1; the ammonia nitrogen content is up to 24.0mg/L, which is improved by 1418% compared with the embodiment 1; its total phosphorus is up to 1.8mg/L.
As can be seen from the above table, compared with example 1, the hydrophilic porous carrier is polyurethane which is not modified by fluorocarbon, the sewage treatment capacity is reduced slightly, and the COD is 100.8mg/L, which is improved by 20% compared with example 1; the lead content is 0.08mg/L; the chromium content is 0.08mg/L; the nickel content is 0.05mg/L; the copper content is 0.06mg/L; the total nitrogen content is 21.5mg/L, which is improved by 20% compared with the embodiment 1; the ammonia nitrogen content is 6.91mg/L, which is improved by 337% compared with the embodiment 1; the total phosphorus is 0.55mg/L, and the polyurethane modified by fluorocarbon can be improved in biological load and oxygen adsorption performance, so that the wastewater treatment is facilitated.
In conclusion, after the components and the proportion of the activated carbon adsorbent are applied to sewage treatment, harmful components in sewage can be effectively removed, and the hydrophilic porous carrier and the water-containing activated carbon have a certain compounding effect, so that the stable use of the activated carbon adsorbent and the sewage treatment effect can be effectively ensured.
Examples 7 to 10
An activated carbon adsorbent is different from example 1 in that a hydrophilic porous support is used in different cases, and specific correspondence is shown in the following table.
Table: comparison Table of use cases of hydrophilic porous Carrier in examples 7 to 10
| Group of | Hydrophilic porous support |
| Example 7 | Prepared from preparation example 2 |
| Example 8 | Prepared from preparation example 3 |
| Example 9 | Prepared from preparation 4 |
| Example 10 | Prepared from preparation 5 |
The activated carbon adsorbents prepared in examples 7 to 10 above were extracted, and performance was measured, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: the treated sewage in each group in the table can meet the requirements of GB 18918-2002 pollutant emission Standard of urban Sewage treatment plant
As can be seen from the table, the activated carbon adsorbents prepared in the examples 1 and 7-10 can effectively remove pollutants in sewage to achieve the secondary standard, and the COD is only 79.4-84.0mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 16.9-17.9mg/L; the ammonia nitrogen content is only 1.49-1.58mg/L; the total phosphorus is only 0.43-0.46mg/L.
Further, the activated carbon adsorbent prepared in examples 7-9 has a good sewage treatment effect, and the COD is 79.4-80.6mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 16.9-17.5mg/L; the ammonia nitrogen content is 1.49-1.52mg/L; the total phosphorus is 0.43-0.44mg/L.
In particular, the activated carbon adsorbent prepared in example 8 has the best sewage treatment effect, and has COD of only 79.4mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 16.9mg/L; the ammonia nitrogen content is only 1.49mg/L; the total phosphorus is only 0.43mg/L, and the preparation process in the preparation example 3 is the optimal process, and the hydrophilic porous carrier prepared under the process condition has better compounding effect with the water-containing active carbon.
In conclusion, the hydrophilic porous carrier prepared under the process conditions has excellent oxygen adsorption and biological load performance, can be compounded with the water-containing activated carbon, and realizes the combined use of a biological membrane method and an activated sludge method, thereby remarkably improving the sewage treatment effect of the activated carbon adsorbent.
Examples 11 to 14
An activated carbon adsorbent is different from example 1 in that a hydrophilic porous support is used in different cases, and specific correspondence is shown in the following table.
Table: comparison Table of use cases of hydrophilic porous Carrier in examples 11 to 14
| Group of | Hydrophilic porous support |
| Example 11 | From preparation 6 |
| Example 12 | Prepared from preparation 7 |
| Example 13 | Prepared from preparation 8 |
| Example 14 | Prepared in preparation example 9 |
The activated carbon adsorbents prepared in examples 11 to 14 were extracted, and performance was measured, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: the treated sewage in each group in the table can meet the requirements of GB 18918-2002 pollutant emission Standard of urban Sewage treatment plant
As can be seen from the table, the activated carbon adsorbents prepared in the examples 1 and 11-14 can effectively remove pollutants in sewage to achieve the secondary standard, and the COD is only 77.4-84.0mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 16.4-17.9mg/L; the ammonia nitrogen content is only 1.45-1.58mg/L; the total phosphorus is only 0.42-0.46mg/L.
Further, the activated carbon adsorbent prepared in examples 11-13 has a good sewage treatment effect, and the COD is 77.4-78.9mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 16.4-17.1mg/L; the ammonia nitrogen content is 1.45-1.49mg/L; the total phosphorus is 0.42-0.43mg/L;
it can be seen that in II the polyurethane and fluorocarbon are present in an amount of 1: (0.18-0.30), the prepared hydrophilic porous carrier has better performance, can be combined with the water-containing activated carbon to enhance the sewage treatment capability of the activated carbon adsorbent.
In particular, the activated carbon adsorbent prepared in example 12 has the best sewage treatment effect and has a COD of 77.4mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 16.4mg/L; the ammonia nitrogen content is 1.45mg/L; the total phosphorus is 0.42mg/L, and the polyurethane and fluorocarbon in the II are shown as 1: when 0.24 is mixed, the prepared hydrophilic porous carrier has optimal performance, and can obviously enhance the sewage treatment capability of the activated carbon adsorbent.
In conclusion, the hydrophilic porous carrier prepared by proportioning the polyurethane and the fluorocarbon has better oxygen adsorption and biological load performance, so that after the hydrophilic porous carrier is compounded with the water-containing activated carbon, the hydrophilic porous carrier can be combined with the activated carbon by a biological membrane method and an activated sludge method, and the sewage treatment effect of the activated carbon adsorbent is obviously improved.
Examples 15 to 19
An activated carbon adsorbent is different from example 1 in that a hydrophilic porous support is used in different cases, and specific correspondence is shown in the following table.
Table: comparison Table of use cases of hydrophilic porous Carrier in examples 15 to 19
| Group of | Hydrophilic porous support |
| Example 15 | Prepared from preparation 10 |
| Example 16 | Prepared from preparation 11 |
| Example 17 | From preparation 12 |
| Example 18 | Prepared in preparation example 13 |
| Example 19 | From preparation 14 |
The activated carbon adsorbents prepared in examples 15 to 19 were extracted, and performance thereof was measured, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: the treated sewage in each group in the table can meet the requirements of GB 18918-2002 pollutant emission Standard of urban Sewage treatment plant
As can be seen from the table above, the activated carbon adsorbents prepared in example 1 and examples 15-19 can effectively remove pollutants in sewage to achieve the secondary standard, and the COD is only 76.3-84.0mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 16.2-17.9mg/L; the ammonia nitrogen content is only 1.43-1.58mg/L; the total phosphorus is only 0.41-0.46mg/L.
Further, the activated carbon adsorbent prepared in examples 16-18 has a good sewage treatment effect, and the COD is 76.3-77.4mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 16.2-16.8mg/L; the ammonia nitrogen content is 1.43-1.46mg/L; the total phosphorus is 0.41-0.42mg/L;
the fluorocarbon in II is prepared from perfluoro-n-butyl furan and perfluoro-tripropylamine according to the weight ratio of 1: and (1-1.5), the prepared hydrophilic porous carrier has better performance, and can enhance the sewage treatment capability of the activated carbon adsorbent after being compounded and combined with the water-containing activated carbon.
In particular, the activated carbon adsorbent prepared in example 17 has the best sewage treatment effect and has a COD of 76.3mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 16.2mg/L; the ammonia nitrogen content is 1.43mg/L; the total phosphorus is 0.41mg/L; the fluorocarbon in II is prepared from perfluoro-n-butyl furan and perfluoro-tripropylamine according to the weight ratio of 1:1.25, the prepared hydrophilic porous carrier has optimal performance, and can obviously enhance the sewage treatment capacity of the activated carbon adsorbent.
In conclusion, the hydrophilic porous carrier prepared from the components and the fluorocarbon mixture has better oxygen adsorption performance and biological load capacity, and can obtain better sewage treatment effect through the combination of a biomembrane method and an activated sludge method after being compounded with the water-containing activated carbon.
Example 20
An activated carbon adsorbent was the same as in example 1 except that the hydrous activated carbon was coconut shell activated carbon having a water content of 10% and the particle size of the coconut shell activated carbon was 80 mesh.
Example 21
An activated carbon adsorbent was the same as in example 1 except that the hydrous activated carbon was coconut shell activated carbon having a water content of 12.5% and the particle size of the coconut shell activated carbon was 70 mesh.
Example 22
An activated carbon adsorbent was the same as in example 1 except that the activated carbon containing water was coconut shell activated carbon having a water content of 15%, and the particle size of the coconut shell activated carbon was 60 mesh.
Example 23
An activated carbon adsorbent was the same as in example 1 except that the hydrous activated carbon was coconut shell activated carbon having a water content of 17%, and the particle size of the coconut shell activated carbon was 40 mesh.
The activated carbon adsorbents prepared in examples 20 to 23 were extracted, and performance thereof was measured, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: the treated sewage in each group in the table can meet the requirements of GB 18918-2002 pollutant emission Standard of urban Sewage treatment plant
As can be seen from the table, the activated carbon adsorbents prepared in the examples 1 and 20-23 can effectively remove pollutants in sewage to reach the secondary standard, and the COD is only 82.7-84.0mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 17.6-18.0mg/L; the ammonia nitrogen content is only 1.55-1.59mg/L; the total phosphorus is only 0.45-0.46mg/L.
In particular, the activated carbon adsorbent prepared in example 21 has the best sewage treatment effect and has a COD of 82.7mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 17.6mg/L; the ammonia nitrogen content is 1.55mg/L; the total phosphorus is 0.45mg/L;
the water-containing activated carbon is coconut shell activated carbon with a water content of 12.5%, the particle size of the coconut shell activated carbon is 70 meshes, and the specific surface area is 1000-1600m 2 When the micropore volume is 90%, the combination effect of the activated carbon adsorbent and the hydrophilic porous carrier is optimal, and after the activated carbon adsorbent and the hydrophilic porous carrier are combined, the activated carbon adsorbent is not easy to harden and settle, and the sewage treatment capacity of the activated carbon adsorbent can be remarkably enhanced.
In summary, the activated carbon adsorbent prepared from the water-containing activated carbon has excellent oxygen adsorption performance and biological load, and can obtain excellent sewage treatment effect through the combination of a biomembrane method and an activated sludge method.
Example 24
An activated carbon adsorbent is different from example 1 in that the nutrient removing agent is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1:0.3: the composition was 0.06, and the other conditions were the same as in example 1.
Example 25
An activated carbon adsorbent is different from example 1 in that the nutrient removing agent is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1:0.5: the other conditions were the same as in example 1 except for the 0.08 composition.
Example 26
An activated carbon adsorbent is different from example 1 in that the nutrient removing agent is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1:0.65: the composition was 0.10, and the other conditions were the same as in example 1.
Example 27
An activated carbon adsorbent is different from example 1 in that the nutrient removing agent is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1:0.8: the composition was 0.12, and the other conditions were the same as in example 1.
Example 28
An activated carbon adsorbent is different from example 1 in that the nutrient removing agent is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1:1: the composition was 0.14, and the other conditions were the same as in example 1.
The activated carbon adsorbents prepared in examples 24 to 28 were extracted, and performance thereof was measured, and the chemical oxygen demand COD, lead, chromium, nickel, copper, total nitrogen, ammonia nitrogen and total phosphorus content before and after sewage treatment were recorded, respectively, and the test results were recorded in the following table:
note that: the treated sewage in each group in the table can meet the requirements of GB 18918-2002 pollutant emission Standard of urban Sewage treatment plant
As can be seen from the table, the activated carbon adsorbents prepared in the examples 1 and 24-28 can effectively remove pollutants in sewage to achieve the secondary standard, and the COD is only 78.1-84.0mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is only 17.1-17.9mg/L; the ammonia nitrogen content is only 1.43-1.58mg/L; the total phosphorus is only 0.45-0.46mg/L.
In particular, the activated carbon adsorbent prepared in example 26 has the best sewage treatment effect and has a COD of 78.1mg/L; the lead content is 0.07mg/L, which is lower than the standard 0.10mg/L; the chromium content is 0.07mg/L, which is lower than the standard 0.10mg/L; the nickel content is 0.04mg/L, which is lower than the standard 0.05mg/L; the copper content is 0.05mg/L, which is lower than the standard 0.50mg/L; the total nitrogen content is 17.1mg/L; the ammonia nitrogen content is 1.43mg/L; the total phosphorus is 0.45mg/L;
the visible nutrient is prepared from trehalose, peptone and potassium dihydrogen phosphate according to the weight ratio of 1:0.65: when the composition is 0.10, the compounding effect of the hydrophilic porous carrier and the water-containing active carbon is optimal, and after the three components are combined,
besides realizing the combination of the biological membrane method and the activated sludge method, the method can also provide sufficient nutrient substances for microorganisms, thereby obtaining better sewage treatment effect.
In conclusion, the nutrient of the components and the proportion can not only ensure the nutrition supply of microorganisms, but also promote the overall sewage treatment effect of the activated carbon adsorbent, and the three have certain compound effect.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (7)
1. The activated carbon adsorbent is characterized by comprising the following components in percentage by weight: 15-35% of water-containing activated carbon, 0.5-1.5% of hydrophilic porous carrier, 0.05-0.15% of nutrient and the balance of deionized water;
the hydrophilic porous carrier is prepared by modifying polyurethane and fluorocarbon;
in the preparation raw materials of the hydrophilic porous carrier, the weight ratio of polyurethane to fluorocarbon is 1: (0.18-0.30), wherein the fluorocarbon is prepared from perfluoro-n-butyl furan and perfluoro-tripropylamine according to the weight ratio of 1: (1-1.5);
the preparation method of the hydrophilic porous carrier comprises the following steps:
I. firstly, heating and melting polyurethane, then adding polyethylene glycol into polyurethane sol, and stirring and mixing under the condition of oxygen introduction to prepare premix;
II. Continuously introducing oxygen, adding fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring and mixing to obtain the hydrophilic porous carrier, and preserving heat for later use.
2. The activated carbon adsorbent of claim 1, wherein the hydrophilic porous support is prepared by the following specific method:
I. firstly, heating polyurethane to 180-200 ℃ to melt into colloid, and then adding polyethylene glycol with molecular weight not less than 2000 into polyurethane sol, wherein the weight ratio of the polyethylene glycol to the polyurethane sol is (1): (3-5) mixing, stirring and mixing for 30-60min at 500-800r/min under the condition of oxygen introduction, and preparing premix;
II. Continuously introducing oxygen, adding fluorocarbon when the premix is cooled to 170+/-2 ℃, stirring for 15-20min at 4000-5000r/min to obtain the hydrophilic porous carrier, and preserving heat for later use.
3. The activated carbon adsorbent of claim 1, wherein the aqueous activated carbon is coconut shell activated carbon having a moisture content of 10-15%, and the coconut shell activated carbon has a particle size of 80-120 mesh.
4. The activated carbon adsorbent of claim 3, wherein the coconut activated carbon has a specific surface area of 1000-1600m 2 And/g, the micropore volume is not less than 90%.
5. The activated carbon adsorbent of claim 1, wherein the nutrient is one or more of sodium alginate, potassium dihydrogen phosphate, trehalose, and peptone.
6. The activated carbon adsorbent according to claim 5, characterized in that the nutrient is composed of trehalose, peptone and potassium dihydrogen phosphate in a weight ratio of 1: (0.5-0.8): (0.08-0.12).
7. A method for preparing the activated carbon adsorbent according to any one of claims 1 to 6, comprising the steps of:
s1, mixing a nutrient and deionized water to obtain a mixed solution A;
s2, mixing the water-containing activated carbon with a hydrophilic porous carrier to obtain a mixture B;
s3, mixing the mixed solution A with the mixed material B, wherein the mixing rate of the mixed material B is 30-90g/min according to the volume per liter of the mixed solution A, and the activated carbon adsorbent can be prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236222.XA CN113856651B (en) | 2021-10-22 | 2021-10-22 | Activated carbon adsorbent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236222.XA CN113856651B (en) | 2021-10-22 | 2021-10-22 | Activated carbon adsorbent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113856651A CN113856651A (en) | 2021-12-31 |
| CN113856651B true CN113856651B (en) | 2024-03-15 |
Family
ID=78997314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111236222.XA Active CN113856651B (en) | 2021-10-22 | 2021-10-22 | Activated carbon adsorbent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113856651B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116715349B (en) * | 2023-06-30 | 2024-01-23 | 南京高科环境科技有限公司 | Preparation method of modified activated carbon, preparation method of microorganism-loaded material and application of microorganism-loaded material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4766229A (en) * | 1985-01-18 | 1988-08-23 | Agency Of Industrial Science And Technology | Materials for gas separation |
| KR19990076405A (en) * | 1998-03-31 | 1999-10-15 | 양인모 | Wastewater Treatment Carrier, Manufacturing Method Thereof And Wastewater Treatment Method Using The Carrier |
| CN101875006A (en) * | 2010-04-30 | 2010-11-03 | 中国科学院长春应用化学研究所 | Solid-phase microextraction material composite and electrode material composite |
| CN105084463A (en) * | 2015-06-16 | 2015-11-25 | 厦门绿邦膜技术有限公司 | Hollow fiber oxygen dissolving film and assembly thereof |
| CN107473320A (en) * | 2017-09-12 | 2017-12-15 | 上海成宙化工有限公司 | A kind of charcoal absorption agent dispersing liquid and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6855255B2 (en) * | 2003-01-28 | 2005-02-15 | Industrial Technology Research Institute | Method for treating wastewater/water with fixed-film microorganism on porous carriers |
-
2021
- 2021-10-22 CN CN202111236222.XA patent/CN113856651B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4766229A (en) * | 1985-01-18 | 1988-08-23 | Agency Of Industrial Science And Technology | Materials for gas separation |
| KR19990076405A (en) * | 1998-03-31 | 1999-10-15 | 양인모 | Wastewater Treatment Carrier, Manufacturing Method Thereof And Wastewater Treatment Method Using The Carrier |
| CN101875006A (en) * | 2010-04-30 | 2010-11-03 | 中国科学院长春应用化学研究所 | Solid-phase microextraction material composite and electrode material composite |
| CN105084463A (en) * | 2015-06-16 | 2015-11-25 | 厦门绿邦膜技术有限公司 | Hollow fiber oxygen dissolving film and assembly thereof |
| CN107473320A (en) * | 2017-09-12 | 2017-12-15 | 上海成宙化工有限公司 | A kind of charcoal absorption agent dispersing liquid and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113856651A (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5685265B2 (en) | Sludge treatment method using sludge biological treatment method, and sludge treatment apparatus and apparatus | |
| CN109956563B (en) | Preparation method and application of efficient aerobic denitrification phosphorus-accumulating bacteria immobilized pellet | |
| CN113856651B (en) | Activated carbon adsorbent and preparation method thereof | |
| CN106517649B (en) | Method for deep nitrogen and phosphorus removal of sewage | |
| CN113264588B (en) | Composite carbon source for sewage treatment | |
| CN111170400A (en) | Water quality substrate modifying agent, preparation method thereof and water quality substrate modifying method | |
| CN113562846A (en) | Denitrification efficient carbon source and processing technology thereof | |
| CN1837361A (en) | Preparation and application of bioactive carrier of carbon fiber composite polyurethane | |
| CN111233133A (en) | Fluidized bed biological filler, preparation method thereof and flowing composite active biological bacteria biological bed | |
| CN113149350A (en) | Chelated biological catalytic particles for in-situ restoration of water body and preparation method thereof | |
| CN107285455B (en) | A kind of method for culturing aerobic granular sludge handling electroplating wastewater | |
| CN110980960B (en) | Oil removing microbial inoculum and sludge treatment method using same | |
| CN116730473A (en) | Biological film composite carrier based on multiple iron autotrophic bacteria and preparation method and application thereof | |
| CN111423065A (en) | Micro-electrolysis Fenton treatment process for printing wastewater | |
| CN108314179B (en) | Method for removing nitrogen, phosphorus and refractory toxic organic matters in sewage by reinforced activated sludge | |
| CN114105314B (en) | Water environment restoration material and preparation method thereof | |
| CN111847642B (en) | High-flow carrier material for water treatment microorganisms, preparation method and water treatment method | |
| CN111875052B (en) | Montmorillonite-pyrite composite biological carrier material and preparation method and application method thereof | |
| CN209740924U (en) | Ectopic treatment system for eutrophic lakes | |
| CN107243328B (en) | Cerium nitrate modified sodium alginate microsphere dephosphorizing agent and preparation and application thereof | |
| CN113060823B (en) | Constructed wetland filler and preparation method thereof | |
| CN113387525B (en) | Curing agent for in-situ remediation of black and odorous water body sediment and preparation method and application thereof | |
| CN116809018B (en) | Preparation method and application of sludge biochar | |
| CN117466430B (en) | Sewage treatment agent based on COD degrading bacteria and preparation method thereof | |
| CN110980962B (en) | Phosphorus-accumulating microbial inoculum and sludge treatment technology using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |