CN104891643A - Composite biocarrier for wastewater treatment - Google Patents
Composite biocarrier for wastewater treatment Download PDFInfo
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- CN104891643A CN104891643A CN201510249034.9A CN201510249034A CN104891643A CN 104891643 A CN104891643 A CN 104891643A CN 201510249034 A CN201510249034 A CN 201510249034A CN 104891643 A CN104891643 A CN 104891643A
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- wastewater treatment
- carrier
- biocarrier
- complex biological
- biological 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
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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention provides a composite biocarrier for wastewater treatment. The base material is high density polyethylene, the composite functional material is slag powder, ferric oxide, coke, starch, cationic polyacrylamide or polyquaternium-10, and the auxiliary material is talcum powder. The composite biocarrier for wastewater treatment provided by the invention has density of 0.93-1.05g/cm<3>. The composite biocarrier has rough surface, short film formation time, strong impact resistance, and can prevent the drop of a microbial film attached to the biocarrier outer surface in water due to friction between carriers. The biocarrier has small contact angle with sewage, the hydrophilcity of the carrier is enhanced, and microorganisms can be attached to the carrier more easily. The biocarrier contains enhancement components of bio-enzyme, can promote the catalytic effect of bio-enzyme, has high bioactivity and fast metabolism, and can significantly enhance the decomposition ability of pollutants in water. The biocarrier contains antiultraviolet components, has a service life of over 30 years, and has no need for replacement and maintenance.
Description
Technical field
The present invention relates to a kind of bio-carrier for wastewater treatment, particularly a kind of complex biological carrier 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, adds modified function material and prepares 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, dehydrogenase activity and biomass large, the complex biological 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
Complex biological carrier for wastewater treatment of the present invention is made up of the raw material of following weight percent, wherein basestocks: high density polyethylene(HDPE) is 90 ~ 95%; Auxiliary material: talcum powder is 0.2 ~ 1%; Complex function material: slag powders is 1 ~ 3%, ferric oxide is 0.5 ~ 1.5%, coke is 0.5 ~ 3%, starch is 1 ~ 3%, cationic polyacrylamide or Polyquaternium-10 are 1 ~ 3%;
The preparation method of the complex biological carrier for wastewater treatment of the present invention is:
1 takes raw material according to above-mentioned weight percent, is carried out Homogeneous phase mixing.
Forcing machine heats up by 2, and body temperature reaches 135 DEG C, and head temperature reaches 130 DEG C.
Mixed raw material is sent in extruder barrel, along with the rotation raw material of extruder screw is forced to push heading to by 3.
4 extrude the effigurate product of tool from extrusion die mouth, and surely mould through sizing, cooling, cutting sizing, can to obtain grey black inside be the right cylinder of cross supporting frame, the cross-sectional area of best cylinder is profile of tooth.
The density of the complex biological carrier for wastewater treatment of the present invention is 0.93 ~ 1.05g/cm
3, preferred density is 0.97g/cm
3; Resistance to impact shock is 72 ~ 79KJ/m
2, preferred resistance to impact shock is 75KJ/m
2; Tensile strength is 27 ~ 31MPa, and preferred tensile strength is 30MPa;
The contact angle of the complex biological carrier for wastewater treatment of the present invention is 69 ~ 82 °.
Complex biological carrier for wastewater treatment of the present invention is added in municipal wastewater Aerobic biological process system, and biofilm required time is 7 ~ 12 days.
Complex biological carrier 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, the biomembranous thickness of complex biological carrier outer surface is 10 ~ 40 μm, and the thickness of inner surface film is 200 ~ 400 μm; BOD clearance is 95 ~ 97%, COD clearance is 90 ~ 97%, ammonia nitrogen removal frank is more than 99%, nitrogen removal rate is 80 ~ 85%, total tp removal rate is 83 ~ 87%.
Complex biological carrier 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 70 ~ 80%, and the clearance of ammonia nitrogen is more than 98%.
Complex biological carrier 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 95%.
Complex biological carrier 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 0.45 ~ 0.85gNH
3-N/m
2d.
Effect of the present invention is:
The 1 complex biological carrier for wastewater treatment of the present invention contains complex function material, reduces the contact angle of sewage and carrier, improves the wetting ability of carrier, microorganism is more easily attached on carrier.
The 2 complex biological carriers for wastewater treatment of the present invention contain 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 is of the present invention for being mixed into slag powders in the complex biological carrier of wastewater treatment, increases specific surface area, adsorptivity is extremely strong, and the microbial film that can prevent carrier outer surface from adhering in water comes off because of friction between carrier.
The density of the 4 complex biological carriers 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.
The 5 complex biological carrier biofilm required times for wastewater treatment of the present invention are short, improve waste water treatment efficiency.
The 6 complex biological carriers for wastewater treatment of the present invention, under high volumetric loading, have efficient denitrification functions.
The 7 complex biological carriers for wastewater treatment of the present invention contain uvioresistant composition, more than 30 years work-ing life, without the need to changing and safeguarding.
Embodiment
Examples of implementation 1
Get talcum powder 0.2kg, the slag powders 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2kg, starch 1kg, cationic polyacrylamide 2kg 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier for wastewater treatment prepared by the present embodiment is carried out to the contrast of density, contact angle, resistance to impact shock and tensile strength with the bio-carrier that pure high density polyethylene(HDPE) directly obtains, comparing result is as follows:
Examples of implementation 2
Get talcum powder 0.2kg, the slag powders 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2kg, starch 1kg, Polyquaternium-10 be 2kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier for wastewater treatment prepared by the present embodiment is carried out to the contrast of density, contact angle, resistance to impact shock and tensile strength with the bio-carrier that pure high density polyethylene(HDPE) directly obtains, comparing result is as follows:
Examples of implementation 3
Get talcum powder 0.2kg, the slag powders 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2kg, starch 1kg, cationic polyacrylamide 2kg 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 complex biological carrier for wastewater treatment of the present invention.
Biofilm thickness and dephosphorization denitrogenation functional examination are carried out to the complex biological carrier for wastewater treatment prepared by the present embodiment, 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
3* d.Under these conditions, record that the biomembranous thickness of carrier outer surface is 37 μm, the thickness of inner surface film is 390 μm with being not less than 100 times of direct microscopic methods; COD clearance is 96%, BOD clearance is 97%, and ammonia nitrogen removal frank is 99.2%, and nitrogen removal rate is 85%, and total tp removal rate is 85%.
Examples of implementation 4
Get talcum powder 0.2kg, the slag powders 2kg of fineness more than 100 orders, ferric oxide 0.8kg, coke 2kg, starch 1kg, Polyquaternium-10 be 2kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
Biofilm thickness and dephosphorization denitrogenation functional examination are carried out to the complex biological carrier for wastewater treatment prepared by the present embodiment, 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
3* d.Under these conditions, record that the biomembranous thickness of carrier outer surface is 40 μm, the thickness of inner surface film is 380 μm with being not less than 100 times of direct microscopic methods; COD clearance is 97%, BOD clearance is 97%, and ammonia nitrogen removal frank is 99.6%, and nitrogen removal rate is 85%, and total tp removal rate is 87%.
Examples of implementation 5
Get talcum powder 0.5kg, the slag powders 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, starch 1kg, cationic polyacrylamide 1.5kg 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 complex biological carrier for wastewater treatment of the present invention.
Biofilm thickness and dephosphorization denitrogenation functional examination are carried out to the complex biological carrier for wastewater treatment prepared by the present embodiment, 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
3* d.Under these conditions, record that the biomembranous thickness of carrier outer surface is 18 μm, the thickness of inner surface film is 270 μm with being not less than 100 times of direct microscopic methods; COD clearance is 90%, BOD clearance is 95%, and ammonia nitrogen removal frank is 99%, and nitrogen removal rate is 81%, and total tp removal rate is 83%.
Examples of implementation 6
Get talcum powder 0.5kg, the slag powders 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, starch 1kg, Polyquaternium-10 be 1.5kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
Biofilm thickness and dephosphorization denitrogenation functional examination are carried out to the complex biological carrier for wastewater treatment prepared by the present embodiment, 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
3* d.Under these conditions, record that the biomembranous thickness of carrier outer surface 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 90%, BOD clearance is 95%, and ammonia nitrogen removal frank is 99.2%, and nitrogen removal rate is 82%, and total tp removal rate is 83%.
Examples of implementation 7
Get talcum powder 0.5kg, the slag powders 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, starch 1kg, cationic polyacrylamide 1.5kg 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 complex biological carrier for wastewater treatment of the present invention.
The bio-carrier that the complex biological carrier being used for wastewater treatment prepared by the present embodiment and pure high density polyethylene(HDPE) directly obtain is added in municipal wastewater Aerobic biological process system respectively, the bio-carrier biofilm required time that pure high density polyethylene(HDPE) directly obtains is 45 days, and the complex biological carrier biofilm required time prepared by the present embodiment is 8 days.Biofilm required time shortens 37 days, illustrates that the complex biological carrier obtained by the present invention has good carrier surface forming biofilm property.
Examples of implementation 8
Get talcum powder 0.5kg, the slag powders 1kg of fineness more than 100 orders, ferric oxide 1kg, coke 1kg, starch 1kg, Polyquaternium-10 be 1.5kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
The bio-carrier that the complex biological carrier being used for wastewater treatment prepared by the present embodiment and pure high density polyethylene(HDPE) directly obtain is added in municipal wastewater Aerobic biological process system respectively, the bio-carrier biofilm required time that pure high density polyethylene(HDPE) directly obtains is 45 days, and the complex biological carrier biofilm required time prepared by the present embodiment is 10 days.Biofilm required time shortens 35 days, illustrates that the complex biological carrier obtained by the present invention has good carrier surface forming biofilm property.
Examples of implementation 9
Get talcum powder 0.2kg, the slag powders 0.8kg of fineness more than 100 orders, ferric oxide 0.7kg, coke 0.5kg, starch 0.8kg, cationic polyacrylamide 1kg 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier being used for 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
3* under d condition, the clearance of COD is 95%, and the clearance of phenol is 99%.
Examples of implementation 10
Get talcum powder 0.2kg, the slag powders 0.8kg of fineness more than 100 orders, ferric oxide 0.7kg, coke 0.5kg, starch 0.8kg, Polyquaternium-10 be 1kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier being used for 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
3* during d, the clearance of COD is 77%, and the clearance of ammonia nitrogen is 98%.
Examples of implementation 11
Get talcum powder 0.2kg, the slag powders 0.8kg of fineness more than 100 orders, ferric oxide 0.7kg, coke 0.5kg, starch 0.8kg, cationic polyacrylamide 1kg 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier being used for 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 0.75gNH
3-N/m
2d.
Examples of implementation 12
Get talcum powder 0.2kg, the slag powders 0.8kg of fineness more than 100 orders, ferric oxide 0.7kg, coke 0.5kg, starch 0.8kg, Polyquaternium-10 be 1kg mixing, 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 complex biological carrier for wastewater treatment of the present invention.
The complex biological carrier being used for 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 0.62gNH
3-N/m
2d.
Claims (5)
1. for a complex biological carrier for wastewater treatment, it is characterized in that: this complex biological carrier being used for 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%; Complex function material: slag powders is 1 ~ 3%, ferric oxide is 0.5 ~ 1.5%, coke is 0.5 ~ 3%, starch is 1 ~ 3%, cationic polyacrylamide or Polyquaternium-10 are 1 ~ 3%.
2. the complex biological carrier for wastewater treatment according to claim 1, is characterized in that: this density being used for the complex biological carrier of wastewater treatment is 0.93 ~ 1.05g/cm
3.
3. the complex biological carrier for wastewater treatment according to claim 1, is characterized in that: this complex biological carrier resistance to impact shock being used for wastewater treatment is 72 ~ 79KJ/m
2.
4. the complex biological carrier for wastewater treatment according to claim 1, is characterized in that: this complex biological carrier tensile strength being used for wastewater treatment is 27 ~ 31MPa.
5. the complex biological carrier for wastewater treatment according to claim 1, is characterized in that: this contact angle being used for the complex biological carrier of wastewater treatment is 69 ~ 82 °.
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| CN201510249034.9A CN104891643A (en) | 2015-05-15 | 2015-05-15 | Composite biocarrier for wastewater treatment |
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|---|---|---|---|
| CN201510249034.9A CN104891643A (en) | 2015-05-15 | 2015-05-15 | Composite biocarrier for wastewater treatment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108178338A (en) * | 2018-02-05 | 2018-06-19 | 大连理工大学 | A kind of electron donor type bio-carrier and preparation method thereof |
| CN109250816A (en) * | 2018-09-20 | 2019-01-22 | 大连理工大学 | A method of based on electron donor type bio-carrier enhanced sewage anaerobic hydrolysis-acidification |
| CN115551466A (en) * | 2020-06-25 | 2022-12-30 | 科丝美诗株式会社 | Cationic cosmetic composition for enhancing makeup adhesion and preventing adhesion |
| CN115855911A (en) * | 2023-02-24 | 2023-03-28 | 湖南三友环保科技有限公司 | Determination method and application of powder carrier biological affinity |
| CN116332347A (en) * | 2023-02-10 | 2023-06-27 | 河南城发水务生态技术研究院有限公司 | Method for treating low-concentration ammonia nitrogen wastewater |
| RU2819887C1 (en) * | 2023-07-23 | 2024-05-28 | Юрий Анатольевич Дмитриев | Device for biological treatment of natural (including sea) water of separate water areas from domestic contaminants and composite material for its production |
-
2015
- 2015-05-15 CN CN201510249034.9A patent/CN104891643A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108178338A (en) * | 2018-02-05 | 2018-06-19 | 大连理工大学 | A kind of electron donor type bio-carrier and preparation method thereof |
| CN109250816A (en) * | 2018-09-20 | 2019-01-22 | 大连理工大学 | A method of based on electron donor type bio-carrier enhanced sewage anaerobic hydrolysis-acidification |
| CN115551466A (en) * | 2020-06-25 | 2022-12-30 | 科丝美诗株式会社 | Cationic cosmetic composition for enhancing makeup adhesion and preventing adhesion |
| CN116332347A (en) * | 2023-02-10 | 2023-06-27 | 河南城发水务生态技术研究院有限公司 | Method for treating low-concentration ammonia nitrogen wastewater |
| CN116332347B (en) * | 2023-02-10 | 2024-02-06 | 河南城发水务生态技术研究院有限公司 | Method for treating low-concentration ammonia nitrogen wastewater |
| CN115855911A (en) * | 2023-02-24 | 2023-03-28 | 湖南三友环保科技有限公司 | Determination method and application of powder carrier biological affinity |
| RU2819887C1 (en) * | 2023-07-23 | 2024-05-28 | Юрий Анатольевич Дмитриев | Device for biological treatment of natural (including sea) water of separate water areas from domestic contaminants and composite material for its production |
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Inventor after: Quan Wuzhe Inventor after: Zhong Hanmin Inventor after: Chen Jianping Inventor after: Chen Hailong Inventor before: Quan Wuzhe |
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Effective date of registration: 20151217 Address after: 116021 Guang Rong mansion, 90 Xi'an Road, Shahekou District, Liaoning, Dalian, 2001 Applicant after: Dalian Wedo Environmental Material and Technology Co., Ltd. Applicant after: General Water of China Co., Ltd. Address before: 116021 Guang Rong mansion, 90 Xi'an Road, Shahekou District, Liaoning, Dalian, 2001 Applicant before: Dalian Wedo Environmental Material and Technology Co., Ltd. |
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Application publication date: 20150909 |