CN113307357A - Device for treating organic wastewater by contact oxidation method - Google Patents
Device for treating organic wastewater by contact oxidation method Download PDFInfo
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- CN113307357A CN113307357A CN202110624597.7A CN202110624597A CN113307357A CN 113307357 A CN113307357 A CN 113307357A CN 202110624597 A CN202110624597 A CN 202110624597A CN 113307357 A CN113307357 A CN 113307357A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C02F3/00—Biological 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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Abstract
The scheme relates to a device for treating organic wastewater by a contact oxidation method, which comprises a water treatment tank, wherein a water inlet and a water outlet are respectively arranged on two sides of the water treatment tank; the biological adsorbent is placed in the hollow suspension ball and is arranged inside the water treatment tank; the aeration device comprises an air blower arranged outside the water treatment tank, a main air pipe arranged inside the water treatment tank and communicated with the air blower, and a plurality of branch pipes connected with the hollow suspension balls in series. The biological adsorbent is placed in the hollow suspension ball, so that the contact area with sewage is increased, and the aeration area is increased; the aeration holes are directly formed in the inner section of the hollow suspension ball, so that the biological adsorbent can be directly aerated, the air consumption is saved, and the aeration holes are arranged in a triangular shape with the diameter gradually reduced from the pipe hole, so that the air is gathered, and the aeration efficiency is improved; the biological adsorbent has high phenol selective adsorption rate, small environmental influence on water and high adsorption speed.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a device for treating organic wastewater by a contact oxidation method.
Background
Common industrial wastewater such as wastewater discharged in the production processes of coal chemical industry, dye, medicine, pesticide, paper making and the like contains high-concentration organic substances, and is common organic wastewater which is high in toxicity and difficult to degrade. If the fertilizer is discharged randomly, the growth and the reproduction of animals and plants are damaged, and the life health of human beings is also damaged. The treatment of industrial wastewater is generally carried out by adsorption, flocculation, sedimentation, biodegradation, etc., and many studies have been made in the past. However, as society continues to grow, treatment methods and agents also need to be updated.
The microbial degradation method is an economical, practical and environment-friendly treatment technology and is the focus of current research, but the single treatment method cannot meet the current industrial wastewater treatment requirement. In the traditional biodegradation technology, most of carrier materials which have the function of fixing microorganisms are only used as a loaded medium and have no adsorption function, and a small amount of organic matters with adsorption capacity are used as the carrier materials, but the materials have weak mechanical properties and cannot be shaped, and the application field is limited; the composite carrier material is a material formed by combining inorganic and organic carriers, the problems of weak combination strength and low adsorption performance of a single carrier are solved, the comprehensive effect is good, and the pertinence is relatively poor.
In the water treatment device, filter bed fillers and surface microorganisms form a stable ecosystem, the impact force of the water resistance load is strong, and the filter bed can deal with high-concentration organic pollutant wastewater, but the filter bed is easy to block when running for a long time, so that ventilation and oxygen supply are influenced, and the quality of effluent water is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for treating organic wastewater by a contact oxidation method, wherein a biological adsorbent prepared from a carrier material and microorganisms is arranged in the device, the device has excellent adsorption and degradation capacity on phenolic substances, and each part in a water treatment device is reasonable in design, so that the aeration efficiency is improved, the blockage is prevented, and the device can be operated for a long time.
In order to achieve the purpose, the invention provides the following technical scheme:
a device for treating organic wastewater by a contact oxidation method comprises
The water treatment tank is provided with a water inlet and a water outlet at two sides respectively;
the biological adsorbent is placed in the hollow suspension ball and is arranged inside the water treatment tank;
the aeration device comprises an air blower arranged outside the water treatment tank, a main air pipe arranged inside the water treatment tank and communicated with the air blower, and a plurality of branch pipes connected with the hollow suspension balls in series.
Furthermore, a water baffle is arranged in the water treatment tank close to the water inlet; a water outlet channel is arranged at the joint of the upper end of the water treatment tank and the water outlet.
Furthermore, a plurality of aeration holes are distributed on the branch pipe in a staggered manner, the aeration holes are triangular, and the hole diameter is gradually reduced from the branch pipe to the outside.
Further, the upper ends of the branch pipes are also stabilized in the water treatment tank by brackets.
Further, the biological adsorbent is a material prepared from carbonized straw powder, sodium alginate and chitosan/CNT material immobilized candida.
Further, the treatment process of the carbonized straw powder comprises the following steps: cleaning straws, naturally drying in the air, heating to 700 ℃ at a heating rate of 10 ℃/min in a nitrogen atmosphere, keeping the temperature for 1h, and cooling to room temperature in a nitrogen atmosphere; and grinding the obtained solid, placing the ground solid in nitric acid for soaking for 12h, washing to be neutral and drying, then placing the solid in a potassium hydroxide solution for soaking for 12h, washing to be neutral and drying to obtain carbonized straw powder.
Further, the preparation steps of the chitosan/CNT material are as follows:
s1: sulfonating the multi-arm carbon nano-tube, and oxidizing by nitric acid/concentrated sulfuric acid to obtain a carboxylated carbon nano-tube;
s2: adding the carboxylated carbon nanotube and triethanolamine into a reaction bottle containing N, N-dimethylacetamide, and stirring to uniformly disperse the N, N-dimethylacetamide; dispersing methacryloyl chloride in N, N-dimethylacetamide, dropwise adding the methacryloyl chloride into a reaction bottle at 0 ℃ under the protection of nitrogen, after dropwise adding, moving the reaction bottle to room temperature, stirring and reacting for 24 hours, centrifuging, washing and drying;
s3: dispersing the dried product of S2 in a reaction bottle containing N, N-dimethylformamide, adding styrene, acrylic acid and an initiator AIBN, and carrying out copolymerization reaction in a nitrogen atmosphere to obtain a styrene-acrylic resin modified carbon nanotube;
s4: adding water into the styrene-acrylic resin modified carbon nano tube, carrying out ultrasonic dispersion to prepare 1% latex solution, preparing 1% solution of chitosan by using acetic acid, slowly dropwise adding the solution into the latex solution, continuously stirring for 30min after dropwise adding, repeating centrifugation-water washing for three times, and finally carrying out vacuum drying on the solid obtained by centrifugation to obtain the chitosan/CNT material.
Further, the mass ratio of the modified carbon nano tube to the styrene to the acrylic acid is 1: 1-3: 0.6-1.
Further, the preparation of the biological adsorbent comprises the following steps:
firstly, culturing and domesticating microorganisms: after candida is subjected to amplification culture in 50ml of LB liquid culture medium, thalli are centrifugally separated, washed for 3 times by PBS, and the candida with the wet weight of 2.0 is weighed and re-dispersed in the PBS to prepare suspension;
secondly, fixing the microorganisms:
1) adding 1g of carbonized straw powder into 5ml of the suspension, uniformly mixing, and adsorbing at 4 ℃ for 4 hours;
2) dissolving sodium alginate in PBS to obtain 0.5g/ml sodium alginate solution, adding 15ml sodium alginate solution into step 1), stirring, slowly adding 200ml CaCl containing 3.0%2Standing the solution at room temperature for 8h, removing CaCl2Solution, washing with PBS;
3) dispersing chitosan/CNT materials and N-hydroxysuccinimide with equal mass in DMF, adding three times of N, N-dicyclohexylcarbodiimide and 1.5 times of 4-dimethylaminopyridine, stirring for 24h at room temperature, centrifuging, washing with PBS to obtain an activated chitosan/CNT material, taking the immobilized particles obtained in the step 2) and the activated chitosan/CNT material, dispersing in PBS, and placing in a constant temperature shaking table at 25 ℃ for shaking for 24h to obtain the biological adsorbent.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention fixes the microorganism on the carrier material by combining the modes of adsorption-embedding-chemical bonding, forms a three-dimensional structure between inorganic and organic, generates a directional macropore, has uniform aperture, is beneficial to the attachment growth of the microorganism, and can keep higher microorganism activity and better mass transfer; the selective adsorption rate to phenol is high, the environmental influence of water is small, and the adsorption performance is optimal when the pH value is 5-8; the adsorption speed is high, and the equilibrium is basically reached in 60 min.
2. The biological adsorbent is placed in the hollow suspension ball and is connected in series with the aeration branch pipe, so that the contact area with sewage is increased, and the aeration area is increased; aeration hole directly opens in the inside section position of fretwork suspension ball, can be directly to the biological adsorbent aeration, is favorable to practicing thrift the air quantity, and aeration hole sets to the triangle-shaped form that reduces gradually from the pipe hole footpath, is favorable to gathering the air to improve aeration efficiency.
Drawings
FIG. 1 is a schematic diagram of an apparatus for treating organic wastewater by contact oxidation according to an embodiment of the present invention.
FIG. 2 is a schematic view of an aeration apparatus in an apparatus for treating organic wastewater by a contact oxidation method according to an embodiment of the present invention.
10. A water treatment tank; 11. a water inlet; 12. a water outlet; 13. a water outlet channel; 20. a biological adsorbent; 30. an aeration device; 31. a blower; 32. a main air duct; 33. a branch pipe; 34. an aeration hole; 40. hollowing out the suspension ball; 50. a water baffle; 60. and (4) a bracket.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
A device for treating organic wastewater by a contact oxidation method comprises
A water treatment tank 10, both sides of which are respectively provided with a water inlet 11 and a water outlet 12;
the biological adsorbent 20 is placed in the hollow suspension ball 40 and is arranged inside the water treatment tank 10;
and the aeration device 30 comprises a blower 31 arranged outside the water treatment tank 10, a main air pipe 32 arranged inside the water treatment tank 10 and communicated with the blower 31, and a plurality of branch pipes 33 connected with the hollow floating balls 40 in series.
Wherein, a water baffle 50 is arranged in the water treatment tank 10 near the water inlet 11; a water outlet channel 13 is arranged at the joint of the upper end of the water treatment tank 10 and the water outlet 12. The water baffle 50 is beneficial to reducing the impact force when the wastewater enters the water treatment tank 10, avoiding the damage to the internal biological adsorbent caused by the excessively strong impact force, and is easy to facilitate uniform water inlet, thereby avoiding short flow. The water outlet channel 13 plays a role in water storage and transition, facilitates detection of the treated water quality, avoids direct discharge of untreated water, and can also return water to the water treatment tank 10 for secondary treatment.
Wherein, a plurality of aeration holes 34 are distributed on the branch pipe 33 in a staggered way, the aeration holes 34 are in a triangular shape, and the hole diameter is gradually reduced from the position where the branch pipe 33 is arranged. Aeration hole 34 is directly opened in the inside section position of fretwork suspension ball 40, can be directly to the aeration of biological adsorbent 20, is favorable to practicing thrift the air quantity, and aeration hole 34 sets to the triangle-shaped that reduces gradually from branch pipe 33 department to outside aperture, is favorable to gathering the air to improve aeration efficiency.
Wherein the upper ends of the branch pipes 33 are also stabilized in the water treatment tank 10 by brackets 60.
The preparation process of the biological adsorbent 20 is as follows:
firstly, culturing and domesticating microorganisms: after candida is subjected to amplification culture in 50ml of LB liquid culture medium, thalli are centrifugally separated, washed for 3 times by PBS, and the candida with the wet weight of 2.0 is weighed and re-dispersed in the PBS to prepare suspension;
secondly, fixing the microorganisms:
1) adding 1g of carbonized straw powder into 5ml of the suspension, uniformly mixing, and adsorbing at 4 ℃ for 4 hours;
2) dissolving sodium alginate in PBS to obtain 0.5g/ml sodium alginate solution, adding 15ml sodium alginate solution into step 1), stirring, slowly adding 200ml CaCl containing 3.0%2Standing the solution at room temperature for 8h, removing CaCl2Solution, washing with PBS;
3) dispersing chitosan/CNT materials and N-hydroxysuccinimide with equal mass in DMF, adding three times of N, N-dicyclohexylcarbodiimide and 1.5 times of 4-dimethylaminopyridine, stirring for 24h at room temperature, centrifuging, washing with PBS to obtain an activated chitosan/CNT material, taking the immobilized particles obtained in the step 2) and the activated chitosan/CNT material, dispersing in PBS, and placing in a constant temperature shaking table at 25 ℃ for shaking for 24h to obtain the biological adsorbent.
Wherein, the treatment process of the carbonized straw powder comprises the following steps:
taking 10g of straws, cleaning, naturally drying in the air, placing in a nitrogen atmosphere, heating to 700 ℃ at a heating rate of 10 ℃/min, keeping the temperature for 1h, and cooling to room temperature under the nitrogen atmosphere; and grinding the obtained solid, placing the ground solid in nitric acid for soaking for 12h, washing to be neutral and drying, then placing the solid in a potassium hydroxide solution for soaking for 12h, washing to be neutral and drying to obtain carbonized straw powder.
The straw is a natural environment-friendly material, and the carbonized straw has large specific surface area, porous surface and strong adsorption force and can be used for adsorbing strains.
Wherein, the preparation steps of the chitosan/CNT material are as follows:
s1: weighing 0.5g of Carbon Nano Tube (CNT) and dispersing in 20ml of concentrated sulfuric acid, adding 2g of sodium nitrite and 5g of diazonium salt p-aminobenzenesulfonic acid, stirring and reacting for 2h at 80 ℃, centrifuging to obtain a solid, dispersing in 100ml of nitric acid/concentrated sulfuric acid (1:3), heating to 60 ℃, refluxing and stirring for 6h, and acidifying to obtain a carboxylated carbon nano tube;
s2: adding 0.5g of carboxylated carbon nanotube and triethanolamine into a reaction bottle containing N, N-dimethylacetamide, and stirring to uniformly disperse the materials; dispersing 1ml of methacryloyl chloride in N, N-dimethylacetamide, dropwise adding the methacryloyl chloride into a reaction bottle at 0 ℃ under the protection of nitrogen, moving the reaction bottle to room temperature after dropwise adding, stirring and reacting for 24 hours, centrifuging, washing and drying;
s3: dispersing 0.5g of the dried product of S2 in a reaction bottle of 50ml of N, N-dimethylformamide, adding 1g of p-fluorostyrene, 0.5g of acrylic acid and 0.01g of initiator AIBN, and carrying out copolymerization reaction under the nitrogen atmosphere to obtain the styrene-acrylic resin modified carbon nanotube;
s4: adding water into the styrene-acrylic resin modified carbon nano tube, carrying out ultrasonic dispersion to prepare 1% latex solution, preparing 1% solution of chitosan by using acetic acid, slowly dropwise adding the solution into the latex solution, continuously stirring for 30min after dropwise adding, repeating centrifugation-water washing for three times, and finally carrying out vacuum drying on the solid obtained by centrifugation to obtain the chitosan/CNT material.
Chitosan is also a natural polymer material and is commonly used for embedding microorganisms by compounding with polyvinyl alcohol. The carbon nano tube has larger specific surface area, unique cavity structure and good adsorption performance, and can enhance the growth and proliferation of cells. Chitosan and carbon nanotubes are good carrier materials for fixing microorganisms, but because of some defects of the chitosan, such as too large molecular weight and high viscosity, the carbon nanotubes are easy to aggregate into micelles, and the compatibility of the chitosan and the carbon nanotubes is poor. According to the scheme, firstly, the carbon nano tube is sulfonated, a sulfonic group with negative charges is introduced, and amino groups are also contained in chitosan molecules, so that the problem of compatibility of the carbon nano tube and the chitosan molecules is solved; the problem of poor dispersibility is further solved by in-situ polymerization of p-fluorostyrene and acrylic acid on the carbon nano tube; meanwhile, the introduction of the styrene-acrylic polymer chain can improve the rigidity of the carrier material, prolong the service life, form van der Waals force and hydrogen bond acting force with phenol molecules and improve the adsorption performance; the abundant carboxyl groups are connected with the microorganisms in a chemical bond mode, so that the adhesive force of the microorganisms is improved.
Sodium alginate is an anionic polysaccharide macromolecule, has good biocompatibility, has no obvious pore structure, fixes microorganisms in an embedding mode and a mode of adsorption and chemical bond, and improves the problem of weak binding force of a single carrier through triple reinforcement. The three-dimensional structure is formed between inorganic and organic substances, directional macropores are generated, the aperture is uniform, the attachment growth of microorganisms is facilitated, and higher microbial activity and better mass transfer property can be maintained; high phenol selective adsorption rate and high adsorption speed.
Engineering cases: the water quality of sewage of a certain pharmaceutical factory before and after passing through the water treatment device is monitored, the phenol degradation rate is calculated to be 97%, the total nitrogen removal rate is 92%, the COD removal rate is 98%, and the water treatment effect is not obviously reduced after the sewage is continuously operated for one month.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. A device for treating organic wastewater by a contact oxidation method is characterized by comprising
A water treatment tank (10) which is provided with a water inlet (11) and a water outlet (12) on two sides respectively;
the biological adsorbent (20) is placed in the hollow suspension ball (40) and is arranged inside the water treatment tank (10);
the aeration device (30) comprises an air blower (31) arranged outside the water treatment tank (10), a main air pipe (32) arranged inside the water treatment tank (10) and communicated with the air blower (31), and a plurality of branch pipes (33) connected with the hollow floating balls (40) in series.
2. The apparatus for treating organic wastewater by contact oxidation according to claim 1, wherein a water baffle (50) is provided inside the water treatment tank (10) near the water inlet (11); a water outlet channel (13) is arranged at the joint of the upper end of the water treatment tank (10) and the water outlet (12).
3. The apparatus for treating organic wastewater according to claim 1, wherein the branch pipe (33) has a plurality of aeration holes (34) alternately distributed therein, and the aeration holes (34) have a triangular shape with a diameter gradually decreasing from the branch pipe (33) to the outside.
4. The apparatus for treating organic wastewater by contact oxidation according to claim 1, wherein the upper end of the branch pipe (33) is further stabilized in the water treatment tank (10) by a bracket (60).
5. The apparatus for treating organic wastewater according to claim 1, wherein the bio-adsorbent (20) is a material prepared from carbonized straw powder, sodium alginate and chitosan/CNT material immobilized candida species.
6. The apparatus for treating organic wastewater by contact oxidation according to claim 5, wherein the treatment process of the carbonized straw powder comprises: cleaning straws, naturally drying in the air, heating to 700 ℃ at a heating rate of 10 ℃/min in a nitrogen atmosphere, keeping the temperature for 1h, and cooling to room temperature in a nitrogen atmosphere; and grinding the obtained solid, placing the ground solid in nitric acid for soaking for 12h, washing to be neutral and drying, then placing the solid in a potassium hydroxide solution for soaking for 12h, washing to be neutral and drying to obtain carbonized straw powder.
7. The apparatus for treating organic wastewater according to claim 5, wherein the chitosan/CNT material is prepared by the following steps:
s1: sulfonating the multi-arm carbon nano-tube, and oxidizing by nitric acid/concentrated sulfuric acid to obtain a carboxylated carbon nano-tube;
s2: adding the carboxylated carbon nanotube and triethanolamine into a reaction bottle containing N, N-dimethylacetamide, and stirring to uniformly disperse the N, N-dimethylacetamide; dispersing methacryloyl chloride in N, N-dimethylacetamide, dropwise adding the methacryloyl chloride into a reaction bottle at 0 ℃ under the protection of nitrogen, after dropwise adding, moving the reaction bottle to room temperature, stirring and reacting for 24 hours, centrifuging, washing and drying;
s3: dispersing the dried product of S2 in a reaction bottle containing N, N-dimethylformamide, adding styrene, acrylic acid and an initiator AIBN, and carrying out copolymerization reaction in a nitrogen atmosphere to obtain a styrene-acrylic resin modified carbon nanotube;
s4: adding water into the styrene-acrylic resin modified carbon nano tube, performing ultrasonic dispersion to prepare 1% latex solution, preparing 1% solution of chitosan by using acetic acid, slowly dropwise adding the solution into the latex solution, continuously stirring for 30min after dropwise adding, repeating centrifugation-water washing for three times, and finally performing vacuum drying on the solid obtained by centrifugation to obtain the chitosan/CNT material.
8. The apparatus for treating organic wastewater according to claim 5, wherein the mass ratio of the modified carbon nanotubes to the styrene and acrylic acid is 1:1 to 3:0.6 to 1.
9. The apparatus for treating organic wastewater according to claim 5, wherein the preparation of the bio-adsorbent (20) comprises the steps of:
firstly, culturing and domesticating microorganisms: after candida is subjected to amplification culture in 50ml of LB liquid culture medium, thalli are centrifugally separated, washed for 3 times by PBS, and the candida with the wet weight of 2.0 is weighed and re-dispersed in the PBS to prepare suspension;
secondly, fixing the microorganisms:
1) adding 1g of carbonized straw powder into 5ml of the suspension, uniformly mixing, and adsorbing at 4 ℃ for 4 hours;
2) dissolving sodium alginate in PBS to obtain 0.5g/ml sodium alginate solution, and adding 15ml sodium alginate solutionIn step 1), after stirring uniformly, slowly adding 200ml of CaCl containing 3.0%2Standing the solution at room temperature for 8h, removing CaCl2Solution, washing with PBS;
3) dispersing chitosan/CNT materials and N-hydroxysuccinimide with equal mass in DMF, adding three times of N, N-dicyclohexylcarbodiimide and 1.5 times of 4-dimethylaminopyridine, stirring for 24h at room temperature, centrifuging, washing with PBS to obtain an activated chitosan/CNT material, taking the immobilized particles obtained in the step 2) and the activated chitosan/CNT material, dispersing in PBS, and placing in a constant temperature shaking table at 25 ℃ for shaking for 24h to obtain the biological adsorbent.
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| CN103589711A (en) * | 2013-10-31 | 2014-02-19 | 天津大学 | Immobilization method for carbon dioxide invertase |
| CN106542634A (en) * | 2015-09-19 | 2017-03-29 | 高永宏 | The method that Novel anaerobic baffling-bio-contact oxidation group technology processes waste water |
| KR101715389B1 (en) * | 2016-07-06 | 2017-03-10 | 금강환경(주) | Bio-film media having improved adhesive property of microorganism and advanced water treatment process using the same |
| CN107151665A (en) * | 2017-06-22 | 2017-09-12 | 长沙理工大学 | The method that immobilization endophyte biological adsorption agent handles lead waste water |
| CN110078048A (en) * | 2019-05-23 | 2019-08-02 | 山东省科学院新材料研究所 | A kind of carbon aerogels natural gas adsorbent and its preparation method and application |
| CN111302428A (en) * | 2020-04-02 | 2020-06-19 | 四川锦城佳禾生态环保科技有限公司 | Be applied to sewage treatment's improvement device based on particle adsorption |
| CN111620512A (en) * | 2020-04-27 | 2020-09-04 | 周尚生 | Adsorption type transfer repairing device for heavy metal polluted water body |
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