CN101538089A - Biological water purification agent powder and preparation thereof - Google Patents
Biological water purification agent powder and preparation thereof Download PDFInfo
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- CN101538089A CN101538089A CN200910049475A CN200910049475A CN101538089A CN 101538089 A CN101538089 A CN 101538089A CN 200910049475 A CN200910049475 A CN 200910049475A CN 200910049475 A CN200910049475 A CN 200910049475A CN 101538089 A CN101538089 A CN 101538089A
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Abstract
The invention discloses a biological water purification agent powder and a preparation thereof, belonging to the technical field of microorganism environment protection. The biological water purification agent powder comprises 35-55 wt% of composite bacillus, 10-20 wt% of nitrobacteria and 25-55 wt% of auxiliary material. In the preparation of the biological water purification agent powder, a primary solid content separator is used for removing 60-70% of water, a secondary solid content separator is used for obtaining a formed solid content with the solid content being 30-45%, and finally mixing preparation is carried out to obtain the finished product. The biological water purification agent powder can be used in purification treatment of contaminated water to improve the water quality, and the substrate sludge is decomposed to provide an excellent water quality environment for aquaculture animals.
Description
Technical field
The invention belongs to the environmental protection technical field of microorganism, be specifically related to a kind of biological water purification agent powder and preparation thereof and application.
Background technology
Biologic water cleaner selects for use efficient composite bacillus, nitrobacteria to form through the fermentation compatibility.Be mainly used in organic pollutants such as decomposing hydrocoles movement, residual bait and animals and plants remains.To guarantee to culture the water quality of middle and later periods.At present the production marketing form is based on aqueous suspension, its solid content is 2%～5%, and aqueous suspension has increased the cost of packing, transportation, storage.But because solid particle is tiny, particle diameter is 0.5～1.0 μ m, and conventional separation means is difficult to solid substance and water are separated, and then production cost is uneconomical with membrane filtration technique.
Summary of the invention
The objective of the invention is provides a kind of biological water purification agent powder in order to overcome defective of the prior art, and the present invention also further provides the preparation method and the application of this biological water purification agent powder.
Biological water purification agent powder of the present invention comprises following component and weight percentage:
Composite bacillus 35-55%
Nitrobacteria (Nitrifer bacteria.) 10-20%
Auxiliary material 25-55%
Wherein, the preferred efficient composite bacillus of composite bacillus.Efficient composite bacillus can decompose the residual bait in pond and ight soil and other pollutents rapidly all sidedly: protein, fat, Mierocrystalline cellulose, starch etc.; Low temperature resistant, can be in the water at low temperature environment about 12 ℃ well-grown; Lower oxygen concentration resistance; Efficient composite bacillus is through commercial acquisition.
Preferable, composite bacillus by component and weight percentage be:
Bacillus?megaterium 5-15％
Bacillus?subtills 15-25％
Bacillus?licheniformis 15-25％
Bacillus?brevis 25-35％
Nitrifer?bacteria 15-25％
Auxiliary material can be selected one or more in the conventional auxiliary material for use, as Semen Maydis powder, flour etc.Semen Maydis powder and flour can use separately, also can mix than row according to certain.
Be the further cost of saving, and ensure the bacterium vigor in the pulvis, the present invention improves on the preparation technology of pulvis.
The preparation method of biological water purification agent powder of the present invention comprises the following steps:
A. get zymocyte liquid;
B. utilize flocculating agent A and B flocculation earlier;
C. remove the water of 60w%～70w% through one-level solid substance separator, the concentrated solution that obtains;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at the solid substance of 30w%～45w% again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
Above-mentioned flocculating agent A is synthetic organic floculant, optional in polyacrylamide (Polyacrylamide, abbreviation PAM), Poly Dimethyl Diallyl Ammonium Chloride (Poly DMDAAC, abbreviation PDADMA) or dimethyl diallyl ammonium chloride-acrylamide copolymer (DMDAAC-acrylamide, abbreviation PDADMA-AM) one or more.
Above-mentioned flocculating agent B is an inorganic flocculating agent, one or more in optional auto-polymerization aluminum chloride (PAC), polyaluminium sulfate (Polymerizationaluminum sulfate, abbreviation PAS), poly-ferric chloride (Polyferric chloride, abbreviation PFC) and the bodied ferric sulfate (PFS).
Based on the weight of the zymocyte liquid of step a, the dosage of flocculating agent A is 0.05w%～0.25w%; The dosage of flocculating agent B is 0.15w%～0.5w%.
One-level solid substance separator is unpowered gravity type boat davit solid-liquid separating equipment, and its effect is that the biologic water cleaner after the flocculation carries out the one-level solid-liquid separation at this equipment, and 60%～70% water is removed in this equipment.
One-level solid substance separator is a vertical structure, comprise opening for feed, separation bin, concentrated solution relief outlet, clear liquid relief outlet, form and interface valve, the separation bin lower section is inverted cone shape and sidewall is provided with form, top is provided with opening for feed, and concentrated solution relief outlet and clear liquid relief outlet communicate with the outlet at bottom of separation bin through interface valve and pipeline.Biologic water cleaner after the flocculation enters separation bin through pipeline by opening for feed, and solid-liquid two phase stratification under action of gravity is discharged concentrated solution and 60%～70% clear liquid respectively by form observation and valve control.
Secondary solid substance separator is to be the solid-liquid separating equipment of impellent with the pressure difference, and it is a separating medium with sintered microporous pipe, and the separator profile is cylindric, and the outlet of purified liquor outlet and solid substance is arranged.Its effect is that the material of 10% left and right sides solid content dewaters through this device separates, and solid content rises to 30%～40%.Pressure difference can be produced by pressurized gas, vacuum, potential difference, liquor pump.
The structure of secondary solid substance separator comprises: closed shell, be located at the separating medium in the closed shell inner chamber, be arranged on the opening for feed of closed shell bottom, be arranged on the purified liquor outlet on closed shell top, be arranged on the solid substance outlet of closed shell bottom, opening for feed is connected with the impellent system through pipeline.
Above-mentioned separating medium is sintered microporous pipe, the preferred sinterable polymer polyethylene of its material, and the trapped particles particle diameter is preferably 0.5um.Preferable, sintered microporous pipe is vertical array fully to contact with concentrated solution in the closed housing body cavity, play better separating effect.
Above-mentioned purified liquor outlet has one or more, and the purified liquor outlet pipeline is provided with the purified liquor outlet valve.
Above-mentioned closed shell top also is provided with one or more inlet mouths, and inlet mouth is communicated with High-pressure air valve, low pressure gas valve or blow-off valve through pipeline.The inlet mouth that communicates with High-pressure air valve can communicate with the inner chamber of sintered microporous pipe.
Preferable, also be provided with the washing water valve on the above-mentioned purified liquor outlet pipeline.
Above-mentioned opening for feed pipeline is provided with feed valve and flow control valve.
Above-mentioned impellent system can be liquor pump.
Also be provided with tensimeter on the above-mentioned closed shell.
Above-mentioned solid substance outlet is provided with the bottom of open-close type, when discharging solid, only need open bottom, can discharge solid substance.
Secondary solid substance separator in use, concentrated solution enters closed shell from opening for feed under the effect of impellent system, when flowing through separating medium, hold back on the surface of the separated medium of solid and clear liquid is discharged from by purified liquor outlet.After discharging a certain amount of clear liquid, close feed valve and open low pressure gas valve, be blown into the liquid of low pressure gas with further dry separating medium surface, then open blow-off valve so that the housing internal and external pressure balance, open bottom immediately, then open High-pressure air valve, be blown into high pressure gas in the sintered microporous pipe and will blow down from the solid substance outlet attached to the solid substance on the separating medium and discharge.
The water body that biological water purification agent powder of the present invention can be used for polluting is as culturing the purifying treatment of water, the water of growing seedlings etc., improve water quality, decompose bed mud (reduce organic content, reduce ammonia nitrogen and nitrous acid nitrogen) and provide a good water quality environment for aquatic animal.
Using method: directly splash in the pond after suitably diluting with pond water, use 40～100 grams for every mu.
The preparation method of biological water purification agent powder of the present invention can concentrate the raising cell concentration, reduces drying cost, prolongs shelf-life with respect to the liquid like product, has strengthened the stability and the result of use of product, also can reduce packing and transportation cost simultaneously.
Behind the water body that biological water purification agent powder of the present invention is used to pollute, can play following effect:
1) decomposes organic (organism such as residual bait, ight soil, the animals and plants remains that swim), reduce the bed mud deposition.
2) transforming ammonia nitrogen and nitrous acid nitrogen is nontoxic nitrate, absorbs for algae then or is converted into nitrogen through the effect of denitrifying bacterium.
3) reduce the organic dirt oxygen consumption, promote useful algae photosynthesis, increase the dissolved oxygen of aquaculture water.
4) promote the planktonic organism breeding, build suitable breed water colour, reduce the utilising efficiency that feed coefficient improves feed.
Description of drawings
Fig. 1: one-level solid substance cyclone separator arrangement synoptic diagram
Fig. 2: secondary solid substance cyclone separator arrangement synoptic diagram
Embodiment
The preparation of embodiment 1 biological water purification agent powder
Strain fermentation:
Get the bacterial classification of Bacillus megaterium, Bacillus subtills, Ba cillus licheniformis, B acillus brevis, Nitriferbacteria, Nitrifer bacteria., respectively by following fermentation condition fermentation:
1. seed liquor preparation:
Substratum: extractum carnis 3g/L peptone 10g/L NaCl 5g/L agar 15-20g/L water pH 7.4-7.6, sterilization, bacterial classification is inserted in cooling back, then on shaking table 28-30 ℃ shake 16 hours (150 rev/mins).
2. first order seed preparation
Substratum: peanut cake 1% corn steep liquor 0.5% peptone 0.15% dextrin 0.3% ammonium sulfate 0.02% sal epsom 0.01% lime carbonate 0.08% water pH 7.4-7.6, sterilization, seed liquor is inserted in the cooling back, according to 1% inoculation, 28-30 ℃ of cultivation.
3. bulk fermentation
Substratum: Semen Maydis powder 3.17g/L, soyflour 5.80g/L, peptone 3.62g/L, MnSO
4.H2O 1.06g/L, glucose 5g/L, ammonium sulfate 1g/L, MgSO
4.7H
2O 1.5g/L and KH
2PO4
3During g/L, MA139 fermentation 18 ~ 24h sterilization, primary seed solution is inserted in the cooling back, and according to 1% inoculation, 28-30 ℃ is cultured to the nectar degree is 4-5X10
9Individual/ml.
4. the preparation of pulvis:
The prescription of biological water purification agent powder is as follows: (w%) composite bacillus 35% nitrobacteria 15% Semen Maydis powder 50%
The prescription w%:Bacillus megaterium/Bacillus subtills/Bacillus licheniformis/Bacillus brevis/Nitrifer bacteria=6% of composite bacillus: 23%: 18%: 33%: 20%
The preparation method:
A. get zymocyte liquid;
B. the PAC flocculation that adds flocculation agent PAM and the 0.4w% of 0.05w%;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at 30%～45% solid substance again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
One-level solid substance separator as shown in Figure 1, be unpowered gravity type boat davit solid-liquid separating equipment, comprise opening for feed 1, separation bin 2, concentrated solution relief outlet 3, clear liquid relief outlet 4, form 5 and interface valve 6, separation bin is divided into two portions up and down, it is cylindric that top is, the bottom is divided into inverted cone-shaped and sidewall is provided with form 5, the root edge on top cooperates airtight with the apical margin of lower section, top is provided with opening for feed 1, and concentrated solution relief outlet 3 and clear liquid relief outlet 4 communicate with the outlet at bottom 7 of separation bin through interface valve 6.Biologic water cleaner after the flocculation enters separation bin through pipeline by opening for feed, and solid-liquid two phase stratification under action of gravity is discharged concentrated solution and 60%～70% clear liquid respectively by form observation and valve control.
Secondary solid substance separator is to be the solid-liquid separating equipment of impellent with the pressure difference as shown in Figure 2, comprising:
Be located at the sintered microporous pipe 9 in the closed shell inner chamber, the material of sintered microporous pipe is the sinterable polymer polyethylene, and the trapped particles particle diameter is 0.5um, and sintered microporous pipe is vertical array in the closed housing body cavity;
Be arranged on the opening for feed 10 of closed shell bottom, opening for feed 10 is connected with transferpump 11 through pipeline, also is provided with feed valve 12 and flow control valve 13 on the opening for feed pipeline;
Be arranged on a plurality of purified liquor outlets 14 on closed shell top, be connected to purified liquor outlet pipeline 15 on the purified liquor outlet, pipeline is provided with purified liquor outlet valve 16, and a plurality of purified liquor outlet pipelines finally converge in the purified liquor outlet house steward 17, and by 18 controls of purified liquor outlet main valve; Also be provided with washing water valve 19 and High-pressure air valve 20 on the purified liquor outlet pipeline, this design makes the water-in of high pressure gas inlet mouth, intake ducting and washing water and inlet channel merge with saving pipeline laying simplified construction with purified liquor outlet and purified liquor outlet pipeline,
Be arranged on the solid substance outlet 21 of closed shell bottom, the solid substance outlet is provided with the bottom 22 of open-close type;
Closed shell top also is provided with an inlet mouth 23, and inlet mouth is communicated with low pressure gas valve 24 and blow-off valve 25 through pipeline.
Secondary solid substance separator in use, concentrated solution enters closed shell from opening for feed under the effect of impellent system, when flowing through separating medium, hold back on the surface of the separated medium of solid and clear liquid is discharged from by purified liquor outlet.After discharging a certain amount of clear liquid, close feed valve and open low pressure gas valve, be blown into the liquid of low pressure gas with further dry separating medium surface, then open blow-off valve so that the housing internal and external pressure balance, open bottom immediately, then open High-pressure air valve, be blown into high pressure gas in the sintered microporous pipe and will blow down from the solid substance outlet attached to the solid substance on the separating medium and discharge.
The preparation of embodiment 2 biological water purification agent powders
Fermentation process is with embodiment 1, and the structure of one-level shape fixing device and secondary shape fixing device and using method are with embodiment 1.
The preparation of pulvis:
The prescription of biological water purification agent powder is as follows: composite bacillus 45% nitrobacteria 15% flour 40%
The prescription w%:Bacillus megaterium/Bacillus subtills/Bacillus licheniformis/Bacillus brevis/Nitrifer bacteria=10% of composite bacillus: 20%: 20%: 30%; 20%
The preparation method:
A. get zymocyte liquid;
B. the PAS flocculation that adds flocculation agent PDADMA and the 0.15w% of 0.2w%;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at 30%～45% solid substance again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
The preparation of embodiment 3 biological water purification agent powders
Fermentation process is with embodiment 1, and the structure of one-level shape fixing device and secondary shape fixing device and using method are with embodiment 1.
The preparation of pulvis:
The prescription of biological water purification agent powder is as follows: composite bacillus 50% nitrobacteria 20% Semen Maydis powder 30%
The prescription w%:Bacillus megaterium/Bacillus subtills/Bacillus licheniformis/Bacillus brevis/Nitrifer bacteria=14% of composite bacillus: 16%: 23%: 24%; 23%
The preparation method:
A. get zymocyte liquid;
B. the PFC flocculation that adds flocculation agent PDADMA-AM and the 0.3w% of 0.25w%;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at 30%～45% solid substance again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
The preparation of embodiment 4 biological water purification agent powders
Fermentation process is with embodiment 1, and the structure of one-level shape fixing device and secondary shape fixing device and using method are with embodiment 1.
The preparation of pulvis:
The prescription of biological water purification agent powder is as follows: composite bacillus 40% nitrobacteria 10% Semen Maydis powder 50%
The prescription w%:Bacillus megaterium/Bacillus subtills/Bacillus licheniformis/Bacillus brevis/Nitrifer bacteria=15% of composite bacillus: 25%: 15%: 30%; 15%
The preparation method:
A. get zymocyte liquid;
B. the PFS flocculation that adds flocculation agent PAM and the 0.5w% of 0.10w%;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at 30%～45% solid substance again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
The preparation of embodiment 5 biological water purification agent powders
Fermentation process is with embodiment 1, and the structure of one-level shape fixing device and secondary shape fixing device and using method are with embodiment 1.
The preparation of pulvis:
The prescription of biological water purification agent powder is as follows: composite bacillus 55% nitrobacteria 16% flour 29%
The prescription w%:Bacillus megaterium/Bacillus subtills/Bacillus licheniformis/Bacillus brevis/Nitrifer bacteria=10% of composite bacillus: 20%: 20%: 30%; 20%
The preparation method:
A. get zymocyte liquid;
B. the PFC flocculation that adds flocculation agent PDADMA-AM and the 0.2w% of 0.23w%;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. separate through two utmost point solid substance separators, the solid content that obtains being shaped is at 30%～45% solid substance again;
E. the zymocyte liquid with various bacterium mixes by aforementioned ratio through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
The result of use of embodiment 6 biological water purification agent powders in waste water
Biologic water cleaner is removed breeding wastewater ammonia nitrogen and nitroso-group nitrogen, and organic test-results:
Adopt the pulvis of embodiment 2 preparations, temperature 28.7.C, using dosage 10g/ ton water, test-results is listed in the table below.Table empty group numerical value is two parallel cell means, and test group numerical value is that its mean value and blank class value are proofreaied and correct.
The clean microbial preparation of ammonia nitre is removed breeding wastewater ammonia nitrogen and nitroso-group nitrogen test-results mg/L
Claims (13)
1. biological water purification agent powder comprises following component and weight percentage:
Composite bacillus 35-55%
Nitrobacteria (Nitrifer bacteria.) 10-20%
Auxiliary material 25-55%.
2. biological water purification agent powder according to claim 1 is characterized in that the component of composite bacillus and weight percentage are:
Bacillus?megaterium 5-15％
Bacillus?subtills 15-25％
Bacillus?licheniformis 15-25％
Bacillus?brevis 25-35％
Nitrifer?bacteria 15-25％。
3. the preparation method of biological water purification agent powder as claimed in claim 1 or 2 comprises the following steps:
A. get zymocyte liquid;
B. utilize the flocculation earlier of synthetic organic floculant and inorganic flocculating agent;
C. remove 60%～70% water through one-level solid substance separator, obtain concentrated solution;
D. concentrated solution separates through two utmost point solid substance separators again, and the solid content that obtains being shaped is at 30%～45% solid substance;
E. the zymocyte liquid with various bacterium is mixed in proportion through the solid substance and the auxiliary material of step c and d acquisition;
F. the mixture with step e can obtain the powdery biologic water cleaner after vacuum-drying.
4. as the preparation method of biological water purification agent powder as described in the claim 3, it is characterized in that described synthetic organic floculant is selected from one or more in polyacrylamide, Poly Dimethyl Diallyl Ammonium Chloride or the dimethyl diallyl ammonium chloride-acrylamide copolymer; Described inorganic flocculating agent is selected from one or more in polymerize aluminum chloride, polyaluminium sulfate, poly-ferric chloride and the bodied ferric sulfate.
5. as the preparation method of biological water purification agent powder as described in the claim 3, it is characterized in that based on the gross weight of step a zymocyte liquid, the dosage of described synthetic organic floculant is 0.05w%～0.25w%; The dosage of described inorganic flocculating agent is 0.15w%～0.5w%.
6. as the preparation method of biological water purification agent powder as described in the claim 3, it is characterized in that, described one-level solid substance separator is a vertical structure, comprise opening for feed, separation bin, concentrated solution relief outlet, clear liquid relief outlet, form and interface valve, the bottom of separation bin is divided into inverted cone shape and sidewall is provided with form, the top of separation bin is provided with opening for feed, and concentrated solution relief outlet and clear liquid relief outlet communicate with the outlet at bottom of separation bin through interface valve and pipeline.
7. as the preparation method of biological water purification agent powder as described in the claim 3, it is characterized in that, the structure of described secondary solid substance separator comprises: closed shell, be located at the separating medium in the closed shell inner chamber, be arranged on the opening for feed of closed shell bottom, be arranged on the purified liquor outlet on closed shell top, be arranged on the solid substance outlet of closed shell bottom, the solid substance outlet is provided with the bottom of open-close type, and opening for feed is connected with the impellent system through pipeline.
8. as the preparation method of biological water purification agent powder as described in the claim 7, it is characterized in that described separating medium is sintered microporous pipe.
9. as the preparation method of biological water purification agent powder as described in the claim 7, it is characterized in that described separating medium trapped particles particle diameter is 0.5um, sintered microporous pipe is vertical array in the closed housing body cavity.
10. as the preparation method of biological water purification agent powder as described in the claim 7, it is characterized in that described closed shell top also is provided with one or more inlet mouths, inlet mouth is communicated with High-pressure air valve, low pressure gas valve or blow-off valve through pipeline.
11. the preparation method as biological water purification agent powder as described in the claim 7 is characterized in that, also is provided with the washing water valve on the pipeline of described purified liquor outlet.
12. the preparation method as biological water purification agent powder as described in the claim 7 is characterized in that the pipeline of described opening for feed is provided with feed valve and flow control valve; Also be provided with tensimeter on the described closed shell.
13. biological water purification agent powder is used for the purifying treatment of polluted-water as claimed in claim 1 or 2.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107936A (en) * | 2011-01-14 | 2011-06-29 | 南京大学 | Technique for treating remaining water of desilted sediment in Lake Tai |
| CN103508553A (en) * | 2013-10-18 | 2014-01-15 | 丹阳市现代生态水产养殖场 | Aquaculture water purifying agent |
| CN104276671A (en) * | 2014-10-22 | 2015-01-14 | 通威股份有限公司 | Biological agent capable of lowering ammonia nitrogen in intensive culture pond as well as preparation method and using method of biological agent |
| CN104478169A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Water purifying agent for wastewater treatment of tire production enterprises and wastewater treatment method |
| CN104529062A (en) * | 2014-12-13 | 2015-04-22 | 山东永泰化工有限公司 | Water purifier for treating production wastewater of rubber accelerator NOBS and wastewater treatment method |
| CN107473396A (en) * | 2017-07-26 | 2017-12-15 | 明光市永言水产食品有限公司 | A kind of water body organic improving preparation |
| CN109502767A (en) * | 2019-01-08 | 2019-03-22 | 李勇 | The construction method of water ecosystem modifying agent and its application method, water ecosystem |
| CN111484146A (en) * | 2020-04-23 | 2020-08-04 | 金满塘(天津)生物科技有限公司 | Chelating agent for removing heavy metal pollution from water body and preparation method and application thereof |
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2009
- 2009-04-16 CN CN200910049475A patent/CN101538089A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107936A (en) * | 2011-01-14 | 2011-06-29 | 南京大学 | Technique for treating remaining water of desilted sediment in Lake Tai |
| CN103508553A (en) * | 2013-10-18 | 2014-01-15 | 丹阳市现代生态水产养殖场 | Aquaculture water purifying agent |
| CN104276671A (en) * | 2014-10-22 | 2015-01-14 | 通威股份有限公司 | Biological agent capable of lowering ammonia nitrogen in intensive culture pond as well as preparation method and using method of biological agent |
| CN104478169A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Water purifying agent for wastewater treatment of tire production enterprises and wastewater treatment method |
| CN104529062A (en) * | 2014-12-13 | 2015-04-22 | 山东永泰化工有限公司 | Water purifier for treating production wastewater of rubber accelerator NOBS and wastewater treatment method |
| CN104529062B (en) * | 2014-12-13 | 2016-03-02 | 山东永泰化工有限公司 | Rubber accelerator NOBS production wastewater treatment water purification agent and method of wastewater treatment |
| CN107473396A (en) * | 2017-07-26 | 2017-12-15 | 明光市永言水产食品有限公司 | A kind of water body organic improving preparation |
| CN109502767A (en) * | 2019-01-08 | 2019-03-22 | 李勇 | The construction method of water ecosystem modifying agent and its application method, water ecosystem |
| CN111484146A (en) * | 2020-04-23 | 2020-08-04 | 金满塘(天津)生物科技有限公司 | Chelating agent for removing heavy metal pollution from water body and preparation method and application thereof |
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Application publication date: 20090923 |