CN104909465A - Modified biological carrier used for waste water processing - Google Patents
Modified biological carrier used for waste water processing Download PDFInfo
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- CN104909465A CN104909465A CN201510249123.3A CN201510249123A CN104909465A CN 104909465 A CN104909465 A CN 104909465A CN 201510249123 A CN201510249123 A CN 201510249123A CN 104909465 A CN104909465 A CN 104909465A
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- carrier
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- 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 invention provides a modified biological carrier used for waste water processing. The raw materials comprises the following raw materials, by weight, a basic material: 90-95% of high-density polyethylene, an auxiliary material: 0.2-1% of talcum powder, and modified functional materials: 1-3% of slag powder, 0.5-1.5% of ferric oxide, 0.5-3% of coke and 1-3% of cationic polyacrylamide or polyquaternary salt-10. The modified biocarrier has a density of 0.93-1.05g/cm<3>, the surface is rough, the specific surface area is large, and falling-off of a microbial film adhering to the outer surface of the carrier caused by friction among the carriers can be prevented in water. The biocarrier is mixed with functional materials with positive charges, affinity with microorganisms with negative charges in water can be enhanced and the film culturing cycle is shortened. The biocarrier contains enhanced components of biological enzymes and raises the decomposition capability of pollutants in sewage substantially. The service life of the biocarrier is more than 30 years, and replacing and maintenance are not needed.
Description
Technical field
The present invention relates to a kind of bio-carrier for wastewater treatment, the bio-carrier of particularly a kind of modification for wastewater treatment.
Background technology
Microbial film moves bed process to be had the advantages such as stable, anti-high loading impact, economical and energy saving and is widely used in sewage treatment process because of it.And the core technology that microbial film moves bed process is biofilm carrier, the characteristic of biofilm carrier determines the efficiency of moving bed biological embrane method treatment process.But the biofilm carrier produced at present adopts the macromolecule resin material such as polyethylene, polypropylene directly to make mostly, and therefore, the bio-carrier bioaffinity produced is poor, carrier outer surface microbial film easily comes off, the clearance of ammonia nitrogen is low.
High density polyethylene(HDPE) has good thermotolerance and winter hardiness, and chemical stability is good, also has high stiffness and toughness, and physical strength is good.Recently, publication number is CN1762851A, CN101066800A and publication No. is that patent discloses of CN102887591A is expected with based on high-density polyethylene material, add modified function material and prepare bio-carrier, advantages such as although obtained bio-carrier has roughness and specific surface area is large, long service life, also also exist that bio-carrier biofilm required time is long, the carrier outer surface not deficiency such as easy to be filmed.
The object of this invention is to provide one and have that surface biological affinity, resistance to impact shock and tensile strength are high, carrier outer surface microbial film difficult drop-off, biofilm required time are short, the bio-carrier of the surface modification of pollutants removal rate in municipal wastewater, trade effluent and aquaculture water can be improved simultaneously.
Summary of the invention
The bio-carrier of the modification for wastewater treatment of the present invention comprises basestocks, modified function material and auxiliary material.Wherein basestocks is high density polyethylene(HDPE), and weight percent is 90 ~ 95%; Auxiliary material is talcum powder, and weight percent is 0.2 ~ 1%.
Above-mentioned modified function material is the compound of slag powders, ferric oxide, coke, cationic polyacrylamide or Polyquaternium-10, and the weight percent of each modified function material is slag powders is respectively 1 ~ 3%, ferric oxide is 0.5 ~ 1.5%, coke is 0.5 ~ 3%, cationic polyacrylamide or Polyquaternium-10 are 1 ~ 3%.
The preparation method of the bio-carrier of the modification for wastewater treatment of the present invention is:
1. take basestocks, auxiliary material and modified function material according to above-mentioned weight percent, carried out Homogeneous phase mixing.
2. heated up by forcing machine, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.
3. mixed basestocks, auxiliary material and modified function material are sent in extruder barrel, along with the rotation raw material of extruder screw is forced to push heading to.
4. extrude the effigurate product of tool from extrusion die mouth, surely mould through sizing, cooling, cut sizing and can obtain greyish black
Look inside is the right cylinder of cross supporting frame, and the cross-sectional area of best cylinder is profile of tooth.
The density of the bio-carrier of the modification for wastewater treatment of the present invention is 0.93 ~ 1.05g/cm
3, preferred density is 0.97g/cm
3;
The bio-carrier of the modification for wastewater treatment of the present invention is added in municipal wastewater Aerobic biological process system, and biofilm required time is 4 ~ 7 days.
The bio-carrier of the modification for wastewater treatment of the present invention carries out solid surface Zeta potential test experiments, and electrolytic solution is in time neutral, and this bio-carrier surface Zeta potential being used for the modification of wastewater treatment is+25 ~ 31mv.
The bio-carrier of the modification for wastewater treatment of the present invention is added in municipal wastewater Aerobic biological process system, wherein BOD volumetric loading 1.5kg/m
3* d, COD volumetric loading 3kg/m
3* d, ammonia nitrogen volumetric loading 0.3kg/m
3* d, total nitrogen volumetric loading 0.8kg/m
3* d, total phosphorus volumetric loading 0.12kg/m
3under the condition of * d, BOD clearance is 93 ~ 95%, COD clearance is 90 ~ 93%, ammonia nitrogen removal frank is more than 99%, nitrogen removal rate is 80 ~ 83%, total tp removal rate is 80 ~ 85%; This biomembranous thickness of bio-carrier outside surface being used for the modification of wastewater treatment is 10 ~ 40 μm, and the thickness of inner surface film is 200 ~ 400 μm.
The bio-carrier of the modification for wastewater treatment of the present invention is added in aquaculture water Aerobic biological process system, wherein influent COD volumetric loading 0.05kg/m
3* d, ammonia nitrogen volumetric loading 0.005kg/m
3under the condition of * d, the clearance of COD is 60 ~ 75%, and the clearance of ammonia nitrogen is more than 98%.
The bio-carrier of the modification for wastewater treatment of the present invention is added in trade effluent Aerobic biological process system, wherein influent COD volumetric loading 2.5kg/m
3* d, phenol volumetric loading 1.0kg/m
3under the condition of * d, the clearance of phenol is the clearance of more than 99%, COD is more than 96%.
The bio-carrier of the modification for wastewater treatment of the present invention drops in open reactor, opens aeration pump, carries out aeration to container, dissolved oxygen controls between 2 ~ 5mg/L, water temperature 20 DEG C, maintains 10min, evenly add 12g chloride solid powder, mix rear beginning timing; Respectively at 0min, 15min, 30min, 60min, 75min, 90min, 105min, 120min sampling and measuring ammonia nitrogen concentration.Draw ammonia nitrogen consumption and time changing curve according to measurement result, the ratio of rate of curve absolute value and bio-carrier surface-area is the rate of nitrification of bio-carrier, and rate of nitrification is 0.5 ~ 1.0gNH
3-N/m
2d.
Effect of the present invention is:
1. the bio-carrier of the modification for wastewater treatment of the present invention is with positive charge in various degree.Because microorganism is with negative charge, makes bio-carrier of the present invention have good bioaffinity, shorten the biofilm cycle, add bio-carrier surface microorganism amount.
2. the bio-carrier of the modification for wastewater treatment of the present invention contains the enhancement composition of biological enzyme, and promote the katalysis of biological enzyme, the biological activity of attachment is high, and metabolism is fast, can significantly improve the capacity of decomposition of water pollutant.
3. the modification for wastewater treatment of the present invention bio-carrier surface irregularity, specific surface area is large, shock resistance is strong, the microbial film that can prevent carrier outer surface from adhering in water because of between carrier friction and come off.
4. the density of the bio-carrier of the modification for wastewater treatment of the present invention is at 0.93 ~ 1.05g/cm
3, the stirring slight in water of biofilm artifact carrier just can be even fluidizing, greatly reduces energy consumption.
5. the bio-carrier of the modification for wastewater treatment of the present invention is under high volumetric loading, has efficient dephosphorization denitrogenation function.
The bio-carrier of the modification for wastewater treatment 6. described in invention contains uvioresistant composition, more than 30 years work-ing life, without the need to replacing, Maintenance free.
Embodiment
Examples of implementation 1
Get the cationic polyacrylamide 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2.2kg, slag powders 2.2kg, talcum powder 0.8kg mix, add high density polyethylene(HDPE) 72kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention, its density is 0.98g/cm
3.
Carry out solid surface Zeta potential test experiments to the bio-carrier of the modification for wastewater treatment prepared by the present embodiment, test result shows: electrolytic solution is in time neutral, and this bio-carrier surface Zeta potential being used for the modification of wastewater treatment is+25mv.
Examples of implementation 2
Get that the Polyquaternium-10 of fineness more than 100 orders is 2kg, ferric oxide 0.8kg, coke 2.2kg, slag powders 2.2kg, talcum powder 0.8kg mix, add high density polyethylene(HDPE) 72kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention, its density is 0.97g/cm
3.
Carry out solid surface Zeta potential test experiments to the bio-carrier of the modification for wastewater treatment prepared by the present embodiment, test result shows: electrolytic solution is in time neutral, and this bio-carrier surface Zeta potential being used for the modification of wastewater treatment is+30mv.
Examples of implementation 3
Get the cationic polyacrylamide 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2.2kg, slag powders 2.2kg, talcum powder 0.8kg mix, add high density polyethylene(HDPE) 72kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier that the bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment and pure high density polyethylene(HDPE) directly obtain is added to respectively in municipal wastewater Aerobic biological process system, the bio-carrier biofilm required time that pure high density polyethylene(HDPE) directly obtains is 45 days, and the bio-carrier biofilm required time of the modification for wastewater treatment prepared by the present embodiment is 6 days.Biofilm required time shortens 39 days, illustrates that the bio-carrier of the modification obtained by the present invention has good carrier surface forming biofilm property.
Examples of implementation 4
Get that the Polyquaternium-10 of fineness more than 100 orders is 2kg, ferric oxide 0.8kg, coke 2.2kg, slag powders 2.2kg, talcum powder 0.8kg mix, add high density polyethylene(HDPE) 72kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier that the bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment and pure high density polyethylene(HDPE) directly obtain is added to respectively in municipal wastewater Aerobic biological process system, the bio-carrier biofilm required time that pure high density polyethylene(HDPE) directly obtains is 45 days, and the bio-carrier biofilm required time of the modification for wastewater treatment prepared by the present embodiment is 7 days.Biofilm required time shortens 38 days, illustrates that the bio-carrier of the modification obtained by the present invention has good carrier surface forming biofilm property.
Examples of implementation 5
Get the cationic polyacrylamide 2kg of fineness more than 100 orders, ferric oxide 1kg, coke 1.5kg, slag powders 1kg, talcum powder 0.5kg mix, add high density polyethylene(HDPE) 74kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is dropped into the mensuration of carrying out biofilm thickness in municipal wastewater Aerobic biological process system, wherein BOD volumetric loading 1.5kg/m
3* d, COD volumetric loading 3kg/m
3* d, ammonia nitrogen volumetric loading 0.3kg/m
3* d, total nitrogen volumetric loading 0.8kg/m
3* d, total phosphorus volumetric loading 0.12kg/m
3* d.Record that this biomembranous thickness of bio-carrier outside surface for the modification of wastewater treatment is 35 μm, the thickness of inner surface film is 370 μm with being not less than 100 times of direct microscopic methods.COD clearance is 92%, BOD clearance is 95%, and ammonia nitrogen removal frank is 99%, and nitrogen removal rate is 83%, and total tp removal rate is 82%.
Examples of implementation 6
Get that the Polyquaternium-10 of fineness more than 100 orders is 2kg, ferric oxide 1kg, coke 1.5kg, slag powders 1kg, talcum powder 0.5kg mix, add high density polyethylene(HDPE) 74kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is dropped into the mensuration of carrying out biofilm thickness in municipal wastewater Aerobic biological process system, wherein BOD volumetric loading 1.5kg/m
3* d, COD volumetric loading 3kg/m
3* d, ammonia nitrogen volumetric loading 0.3kg/m
3* d, total nitrogen volumetric loading 0.8kg/m
3* d, total phosphorus volumetric loading 0.12kg/m
3* d.Record that this biomembranous thickness of bio-carrier outside surface for the modification of wastewater treatment is 32 μm, the thickness of inner surface film is 390 μm with being not less than 100 times of direct microscopic methods.COD clearance is 93%, BOD clearance is 93%, and ammonia nitrogen removal frank is 99%, and nitrogen removal rate is 82%, and total tp removal rate is 83%.
Examples of implementation 7
Get that the Polyquaternium-10 of fineness more than 100 orders is 1kg, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is dropped into the mensuration of carrying out biofilm thickness in municipal wastewater Aerobic biological process system, wherein BOD volumetric loading 1.5kg/m
3* d, COD volumetric loading 3kg/m
3* d, ammonia nitrogen volumetric loading 0.3kg/m
3* d, total nitrogen volumetric loading 0.8kg/m
3* d, total phosphorus volumetric loading 0.12kg/m
3* d.Record that this biomembranous thickness of bio-carrier outside surface for the modification of wastewater treatment is 15 μm, the thickness of inner surface film is 230 μm with being not less than 100 times of direct microscopic methods.COD clearance is 92%, BOD clearance is 93%, and ammonia nitrogen removal frank is 99%, and nitrogen removal rate is 81%, and total tp removal rate is 81%.
Examples of implementation 8
Get the cationic polyacrylamide 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is dropped into the mensuration of carrying out biofilm thickness in municipal wastewater Aerobic biological process system, wherein BOD volumetric loading 1.5kg/m
3* d, COD volumetric loading 3kg/m
3* d, ammonia nitrogen volumetric loading 0.3kg/m
3* d, total nitrogen volumetric loading 0.8kg/m
3* d, total phosphorus volumetric loading 0.12kg/m
3* d.Record that this biomembranous thickness of bio-carrier outside surface for the modification of wastewater treatment is 18 μm, the thickness of inner surface film is 220 μm with being not less than 100 times of direct microscopic methods.COD clearance is 90%, BOD clearance is 94%, and ammonia nitrogen removal frank is 99%, and nitrogen removal rate is 82%, and total tp removal rate is 82%.
Examples of implementation 9
Get the cationic polyacrylamide 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is added in trade effluent Aerobic biological process system, wherein influent COD volumetric loading 2.5kg/m
3* d, phenol volumetric loading 1.0kg/m
3under the condition of * d, the clearance of COD is 98%, and the clearance of phenol is 99%.
Examples of implementation 10
Get that the Polyquaternium-10 of fineness more than 100 orders is 1kg, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment is added in aquaculture water Aerobic biological process system, wherein influent COD volumetric loading 0.05kg/m
3* d, ammonia nitrogen volumetric loading 0.005kg/m
3under the condition of * d, the clearance of COD is 71%, and the clearance of ammonia nitrogen is 98%.
Examples of implementation 11
Get the cationic polyacrylamide 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment drops in open reactor, opens aeration pump, carries out aeration to container, dissolved oxygen controls between 2 ~ 5mg/L, water temperature 20 DEG C, maintains 10min, evenly add 12g chloride solid powder, mix rear beginning timing; Respectively at 0min, 15min, 30min, 60min, 75min, 90min, 105min, 120min sampling and measuring ammonia nitrogen concentration.Draw ammonia nitrogen consumption and time changing curve according to measurement result, the ratio of rate of curve absolute value and bio-carrier surface-area is the rate of nitrification of bio-carrier, and recording rate of nitrification is 0.8gNH
3-N/m
2d.
Examples of implementation 12
Get that the Polyquaternium-10 of fineness more than 100 orders is 1kg, ferric oxide 1kg, coke 1kg, slag powders 0.8kg, talcum powder 0.2kg mix, add high density polyethylene(HDPE) 76kg again, mixing rear feeding extrudes in bucket, forcing machine is heated up, body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.Namely can be made into the bio-carrier of the modification for wastewater treatment of the present invention.
The bio-carrier being used for the modification of wastewater treatment prepared by the present embodiment drops in open reactor, opens aeration pump, carries out aeration to container, dissolved oxygen controls between 2 ~ 5mg/L, water temperature 20 DEG C, maintains 10min, evenly add 12g chloride solid powder, mix rear beginning timing; Respectively at 0min, 15min, 30min, 60min, 75min, 90min, 105min, 120min sampling and measuring ammonia nitrogen concentration.Draw ammonia nitrogen consumption and time changing curve according to measurement result, the ratio of rate of curve absolute value and bio-carrier surface-area is the rate of nitrification of bio-carrier, and recording rate of nitrification is 0.83gNH
3-N/m
2d.
Claims (3)
1. for a bio-carrier for the modification of wastewater treatment, it is characterized in that: this bio-carrier being used for the modification of wastewater treatment is made up of the component of following weight percent, wherein basestocks: high density polyethylene(HDPE) is 90 ~ 95%; Auxiliary material: talcum powder is 0.2 ~ 1%; Modified function material: slag powders is 1 ~ 3%, ferric oxide is 0.5 ~ 1.5%, coke is 0.5 ~ 3%, cationic polyacrylamide or Polyquaternium-10 are 1 ~ 3%.
2. the bio-carrier of the modification for wastewater treatment according to claim 1, is characterized in that: this density being used for the bio-carrier of the modification of wastewater treatment is 0.93 ~ 1.05g/cm
3.
3. the bio-carrier of the modification for wastewater treatment according to claim 1, is characterized in that: this bio-carrier surface Zeta potential being used for the modification of wastewater treatment is+25 ~ 31mv.
Priority Applications (1)
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|---|---|---|---|
| CN201510249123.3A CN104909465A (en) | 2015-05-15 | 2015-05-15 | Modified biological carrier used for waste water processing |
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|---|---|---|---|
| CN201510249123.3A CN104909465A (en) | 2015-05-15 | 2015-05-15 | Modified biological carrier used for waste water processing |
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ID=54078977
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913679A (en) * | 2018-06-12 | 2018-11-30 | 河海大学 | A kind of biofilm reactor magnetic bio-carrier and preparation method thereof |
| CN110655179A (en) * | 2019-09-20 | 2020-01-07 | 西南科技大学 | Hydrophilic and bioaffinity suspended filler and preparation method and application thereof |
| CN113354253A (en) * | 2021-07-19 | 2021-09-07 | 北京建筑大学 | Flocculent material and preparation method and application thereof |
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| CN100455524C (en) * | 2006-07-20 | 2009-01-28 | 大连宇都环境工程技术有限公司 | Modified microbial membrane carrier |
| CN103420490A (en) * | 2013-07-20 | 2013-12-04 | 大连理工大学 | Electrophilic suspended bio-carrier and preparation method thereof |
| CN104229982A (en) * | 2014-09-29 | 2014-12-24 | 滁州友林科技发展有限公司 | Inorganic compound water treatment padding and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11276164A (en) * | 1998-03-31 | 1999-10-12 | Hymo Corp | Microbial carrier |
| CN100455524C (en) * | 2006-07-20 | 2009-01-28 | 大连宇都环境工程技术有限公司 | Modified microbial membrane carrier |
| CN103420490A (en) * | 2013-07-20 | 2013-12-04 | 大连理工大学 | Electrophilic suspended bio-carrier and preparation method thereof |
| CN104229982A (en) * | 2014-09-29 | 2014-12-24 | 滁州友林科技发展有限公司 | Inorganic compound water treatment padding and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913679A (en) * | 2018-06-12 | 2018-11-30 | 河海大学 | A kind of biofilm reactor magnetic bio-carrier and preparation method thereof |
| CN108913679B (en) * | 2018-06-12 | 2021-07-27 | 河海大学 | Magnetic biological carrier for biofilm reactor and preparation method thereof |
| CN110655179A (en) * | 2019-09-20 | 2020-01-07 | 西南科技大学 | Hydrophilic and bioaffinity suspended filler and preparation method and application thereof |
| CN113354253A (en) * | 2021-07-19 | 2021-09-07 | 北京建筑大学 | Flocculent material and preparation method and application thereof |
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