CN103951039A - Preparation and application of nitrifying bacteria immobilized bioactive filler based on polyurethane carrier - Google Patents
Preparation and application of nitrifying bacteria immobilized bioactive filler based on polyurethane carrier Download PDFInfo
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- CN103951039A CN103951039A CN201410137211.XA CN201410137211A CN103951039A CN 103951039 A CN103951039 A CN 103951039A CN 201410137211 A CN201410137211 A CN 201410137211A CN 103951039 A CN103951039 A CN 103951039A
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- carrier
- nitrobacteria
- polyurethane foam
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- nitrifying bacteria
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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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Abstract
The invention discloses preparation and an application of a nitrifying bacteria immobilized bioactive filler based on a polyurethane carrier, and belongs to the technical field of water treatment. The bioactive filler comprises two parts: an embedding body and the polyurethane carrier; a porous structure of the polyurethane foam carrier can provide a quite good and relatively stable living environment for microorganisms, and is beneficial for attachment and reproduction of the microorganisms. An embedding liquid is prepared by mixing a nitrifying bacteria concentrated solution and a polyvinyl alcohol solution; a whole sheet of polyurethane foam is used as the embedding carrier, the embedding liquid is immersed to the interior of the polyurethane foam by squeezing and other ways, the embedding body is formed after boric acid secondary cross-linking and is combined with the polyurethane carrier to obtain a filler shape meeting requirements, and thus the nitrifying bacteria bioactive filler is obtained. The prepared nitrifying bacteria immobilized bioactive filler not only solves the problems that nitrifying bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.
Description
Technical field
The present invention relates to water treatment field, particularly a kind of preparation and application of the immobilized biological activated filler of nitrobacteria based on urethane carrier.
Background technology
Now, ammonia and nitrogen pollution problem is more and more serious, and ammonia nitrogen becomes 12 and reduces discharging new binding target, and promoting the ammonia and nitrogen pollution level of preventing and treating becomes the necessary behave that improves quality of water environment.At present, ammonia nitrogen waste water treatment method is divided into three major types, physico-chemical process, biochemical process and advanced oxidation processes.Biochemical process is due to technical maturity, and stable performance is acknowledged as a kind of economy, effective and the most rising method.Biochemical process comprises activated sludge process and biomembrance process.In traditional activated sludge process, by sludge reflux, keep amount of bacteria, just must increase quantity of reflux keeps high bacterial concentration to want to obtain high-level efficiency, will cause like this running cost to rise, obviously unactual.In addition, the generation cycle of nitrobacteria is long, and increment speed is slow, causes in reactor nitrobacteria concentration low, and processing efficiency is difficult to improve.Be subject to seasonal effect large.Summer temp raises, and biochemical speed is fast, and to winter, northern most of Sewage Plant all can face thread microbial sludge bulking problem, causes nitrifier to be run off, and then causes water outlet ammonia nitrogen to exceed standard.Therefore, can consider that applying biological embrane method makes up the shortcoming in activated sludge process, but biomembrance process has problems equally, for nitrobacteria, poor due to self film forming ability, natural membrane is chronic, and natural membrane non-selectivity, is difficult to form highdensity flora advantage.Various reasons shows, traditional biochemical process cannot reach efficient nitrification efficiency.
CN101941758 discloses " a kind of method of urethane using immobilized nitrifying bacteria treatment of Power nitrogenous effluent ", and its object is to provide a kind of method that improves the urethane using immobilized nitrifying bacteria treatment of Power nitrogenous effluent of sewage water denitrification processing efficiency.This technical scheme: the nitrobacteria that filters out high vigor from the aerobic activated sludge of denitrogenation Sewage treatment systems carries out amplification cultivation, it is standby that centrifugal concentrating is made nitrifier suspension, to the sodium alginate that adds 0.016g/L in the polyvinyl alcohol of 16wt%, dissolve after cooling and add equal-volume bacteria suspension, pour into afterwards in the spherical urethane carrier of diameter 0.5-1.0cm and adsorb, after 1-2 hour, add saturated boric acid to be cross-linked, make urethane using immobilized nitrifying bacteria and be added in fluidized-bed reactor and move.Its weak point is: by after the independent adsorption of immobilization of spherical urethane carrier of diameter 0.5-1.0cm, polyurethane surface can form the film of one deck densification, affects mass transfer, and processing efficiency is low.In addition, research shows, when urethane carrier diameter is greater than 0.5cm, carrier inside mass transfer is affected and forms dead band.Polyvinyl alcohol is 16wt%, and this massfraction concentration for urethane is carrier immobilized is bigger than normal, adopts the meeting of nature suction type because polyvinyl alcohol concentration is too high, and viscosity is large, causes urethane carrier inside cannot be adsorbed onto polyvinyl alcohol mixing liquid.
For the problems referred to above, we develop a kind of biological active filling material with efficient nitrification efficiency, are with a wide range of applications.
Summary of the invention
The object of the invention is to develop the immobilized biological activated filler of a kind of nitrobacteria based on urethane carrier, this biological active filling material adopts immobilized mode to make, can form efficient nitrifying bacteria community advantage, and using polyurethane foam as carrier, polyurethane foam inside in moulding process has formed a lot of micropores, can be microorganism very good, relatively stable living environment is provided, be conducive to adhering to, breeding of microorganism.
In order to realize above-mentioned state, the present invention has adopted following technical scheme.
The immobilized biological activated filler of nitrobacteria based on urethane carrier, is characterized in that: block polyurethane foam is adsorbed embedding liquid by extruding and adsorbed the immobilized nitrobacteria that has.
A preparation for the immobilized biological activated filler of nitrobacteria based on urethane carrier, is characterized in that: take the macromolecular materials such as polyurethane foam as embedding carrier; Take municipal wastewater treatment plant second pond excess sludge as bacterium source, and the nitrobacteria bacteria suspension centrifugal concentrating by after screening enrichment culture, obtains 10
8-10
9the nitrobacteria concentrated solution of individual/mL; According to polyvinyl alcohol-boric acid secondary crosslinking method, nitrobacteria concentrated solution and polyvinyl alcohol solution to be mixed, and add calcium carbonate and be prepared into embedding liquid, polyvinyl alcohol mass concentration is 30-50g/L, calcium carbonate mass concentration is 1g/L; Embedding liquid is poured in whole polyurethane foam, repeatedly pushed polyurethane foam, make embedding liquid enter into polyurethane foam inside, put into after saturated boric acid solution 1-3h, regulate boric acid solution pH to 8-10, crosslinked 3-24h, taken out, cleaned remained on surface material, be cut into the shape that meets the requirements; Its shape can be the square of length of side 3-5mm, the high rectangular parallelepiped that is respectively 3-5mm of length and width, and the right cylinder of diameter 3-5mm, high 3-5mm, obtains nitrobacteria biological active filling material.
The beneficial effect of the immobilized biological activated filler of nitrobacteria based on urethane carrier of the present invention is mainly reflected in:
1. immobilized biological activated filler bag bacterium amount is large, can set up nitrifying bacteria community advantage, and processing efficiency is high;
2. urethane carrier can form a lot of internal cavities in moulding process, can be nitrobacteria very good, relatively stable living environment is provided, be conducive to nitrobacteria breeding, adhere to;
3. after crosslinked end, polyurethane foam is made to satisfactory shape, avoided crosslinked front cutting to cause each filling surface to form the film of one deck densification, be conducive to mass transfer, saved raw material;
4. biologic packing material shape can be the square of length of side 3-5mm, the rectangular parallelepiped of the high 3-5mm of being respectively of length and width, diameter 3-5mm, the right cylinder of high 3-5mm, experimental result shows, the biological active filling material of this range size can be in the inner dead band that forms of filler, and filler utilization ratio is high;
5. by fashion of extrusion, embedding immersion is entered to polyurethane foam inside, guaranteed that embedding liquid can immerse polyurethane foam inside completely;
6. this urethane carrier specific surface area is large, and good hydrophilic property, contributes to mass transfer, can improve water treatment effect;
7. the nitrobacteria biological active filling material that immobilization makes, global density is between 0.98-1.05, under gas stripping, fluidized state is good, does not exist corner to pile up, the problems such as current short circuit.
Accompanying drawing explanation
Fig. 1 is the immobilized biological activated filler schematic diagram of urethane carrier nitrobacteria;
1. nitrobacteria embedding body, 2. urethane holes in figure
Fig. 2 is the design sketch that embodiment 1 disposes of sewage.
Embodiment
Below in conjunction with case study on implementation, the present invention is more specifically described, but embodiments of the present invention are not limited to this.
Embodiment 1
1. the processing of nitrobacteria
Take municipal wastewater treatment plant second pond excess sludge as bacterium source, and the nitrobacteria bacteria suspension centrifugal concentrating by after screening enrichment culture, obtains 3.5 * 10
9the nitrobacteria concentrated solution of individual/mL.
2. nitrobacteria embedding liquid obtains
Weighing polyvinyl alcohol 200g, add 2500ml ultrapure water post-heating to 90 ℃ to dissolve 15min, after stirring, taking-up reheats to 90 ℃ of dissolving 5min, after taking-up, stir and be cooled to 30 ℃, 2500ml polyvinyl alcohol solution and the 2500ml concentrated solution preparing are mixed, and add 50g calcium carbonate, after stirring, make 5000ml embedding liquid.
3. the combination of embedding liquid and urethane carrier
Embedding liquid is poured in polyurethane foam (1m*1m*9mm), repeatedly pushed polyurethane foam, make embedding liquid can enter urethane inside.
4. the preparation of nitrobacteria biological active filling material
The urethane carrier that is stained with embedding liquid in step (3) is put into saturated boric acid solution, make it in submerged condition, standing 3h, regulator solution pH to 9.0, standing 4h completes immobilization, cleans, and is cut into the square of length of side 3-5mm, the urethane biological active filling material application limitation that the length of side is less than 3mm is large, and the inner mass transfer of urethane biological active filling material that the length of side is greater than 5mm can be affected and form dead band.After stripping and slicing, obtain nitrobacteria biological active filling material, this biological active filling material proportion is between 0.99-1.05.
5. the application of biological active filling material activity
In the reactor of 100L, add embedded nitrobacteria biological active filling material, filling ratio is 30%, 20 ± 2 ℃ of water temperatures, and HRT=3h, pH is 7.5-8.5, NH
4 +-N concentration is 70mg/L, and dissolved oxygen concentration is 2.0-3.0mg/L, and biological active filling material becomes suspension fluidized state, the on time nitrification effect of assaying reaction device under the effect of air lift.Water outlet detected result shows, reactor returns to 97.5% of nitrification activity before embedding, NH after cultivating 1 week
4 +-N concentration is below 5mg/L, and clearance is more than 92.8%, the continuous 3 years ' operation of biological active filling material, and nitrification effect is stable.
Above-mentioned example shows, utilizing urethane carrier to carry out nitrobacteria immobilization, to prepare biological active filling material operating process simple, before can returning to embedding after cultivating 1 week 97.5% of nitrification activity, and this biological active filling material internal void is conducive to nitrifier and adheres to, breeds, Nitrification efficient stable, long service life, has good application prospect.
Claims (4)
1. a preparation for the immobilized biological activated filler of nitrobacteria based on urethane carrier, is characterized in that: take polyurethane foam macromolecular material as embedding carrier; Take municipal wastewater treatment plant second pond excess sludge as bacterium source, and the nitrobacteria bacteria suspension centrifugal concentrating by after screening enrichment culture, obtains 10
8-10
9the nitrobacteria concentrated solution of individual/mL; According to polyvinyl alcohol-boric acid secondary crosslinking method, nitrobacteria concentrated solution and polyvinyl alcohol solution to be mixed, and add calcium carbonate and be prepared into embedding liquid, polyvinyl alcohol mass concentration is 30-50g/L, calcium carbonate mass concentration is 1g/L; Embedding liquid is poured in whole polyurethane foam, repeatedly pushed polyurethane foam, make embedding liquid enter into polyurethane foam inside, put into after saturated boric acid solution 1-3h, regulate boric acid solution pH to 8-10, crosslinked 3-24h, taken out, cleaned remained on surface material, cutting.
2. according to the method for claim 1, it is characterized in that: be cut into the square that is shaped as length of side 3-5mm, the high rectangular parallelepiped that is respectively 3-5mm of length and width, or the right cylinder of diameter 3-5mm, high 3-5mm.
3. the immobilized biological activated filler of the nitrobacteria based on urethane carrier that claim 1 or 2 method prepare.
4. the immobilized biological activated filler of the nitrobacteria based on urethane carrier that prepared by method claimed in claim 1 is for water treatment.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119158A (en) * | 2016-06-29 | 2016-11-16 | 中国科学院烟台海岸带研究所 | A kind of petroleum hydrocarbon degradation bacterial strain, petroleum hydrocarbon degradation microbial inoculum and preparation method and application |
| CN108083553A (en) * | 2017-11-27 | 2018-05-29 | 兰州大学白银产业技术研究院 | A kind of method for handling organic chemical waste water |
| CN108385463A (en) * | 2018-01-24 | 2018-08-10 | 广州市环境保护工程设计院有限公司 | A kind of filler brick being detained facility for biology |
| CN108423836A (en) * | 2018-01-23 | 2018-08-21 | 天津膜天膜科技股份有限公司 | A kind of threadiness microbe carrier and preparation method thereof |
| CN108821384A (en) * | 2018-07-13 | 2018-11-16 | 北京师范大学 | The microparticle polyurethane rubber carrier of fixed denitrifying bacterium |
| CN109504672A (en) * | 2019-01-17 | 2019-03-22 | 中南大学 | A kind of acidophilus leaching microbacteria embedding body and preparation method thereof |
| CN109775860A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of fixed microorganism carrier filler and preparation method thereof |
| CN111470625A (en) * | 2020-05-06 | 2020-07-31 | 北京工业大学 | Preparation and application of anaerobic hydrolysis acidification composite bacteria embedded bioactive filler |
| CN111484123A (en) * | 2020-05-06 | 2020-08-04 | 北京工业大学 | Efficient nitrifying embedded bioactive filler and preparation method thereof |
| CN112723530A (en) * | 2020-12-11 | 2021-04-30 | 温州大学 | Preparation method of immobilized composite filler |
| CN114426696A (en) * | 2020-09-18 | 2022-05-03 | 中国石油化工股份有限公司 | Polyurethane filler and preparation method and application thereof |
| CN117658320A (en) * | 2024-01-24 | 2024-03-08 | 中国人民大学 | Preparation method of sodium alginate-polyurethane filler fixed particle anaerobic ammonia oxidation sludge, product and application thereof |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119158A (en) * | 2016-06-29 | 2016-11-16 | 中国科学院烟台海岸带研究所 | A kind of petroleum hydrocarbon degradation bacterial strain, petroleum hydrocarbon degradation microbial inoculum and preparation method and application |
| CN106119158B (en) * | 2016-06-29 | 2019-06-28 | 中国科学院烟台海岸带研究所 | A kind of petroleum hydrocarbon degradation bacterial strain, petroleum hydrocarbon degradation microbial inoculum and the preparation method and application thereof |
| CN109775860B (en) * | 2017-11-14 | 2021-11-09 | 中国石油化工股份有限公司 | Immobilized microorganism carrier filler and preparation method thereof |
| CN109775860A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of fixed microorganism carrier filler and preparation method thereof |
| CN108083553A (en) * | 2017-11-27 | 2018-05-29 | 兰州大学白银产业技术研究院 | A kind of method for handling organic chemical waste water |
| CN108083553B (en) * | 2017-11-27 | 2021-12-10 | 兰州大学白银产业技术研究院 | Method for treating organic chemical wastewater |
| CN108423836A (en) * | 2018-01-23 | 2018-08-21 | 天津膜天膜科技股份有限公司 | A kind of threadiness microbe carrier and preparation method thereof |
| CN108385463A (en) * | 2018-01-24 | 2018-08-10 | 广州市环境保护工程设计院有限公司 | A kind of filler brick being detained facility for biology |
| CN108821384A (en) * | 2018-07-13 | 2018-11-16 | 北京师范大学 | The microparticle polyurethane rubber carrier of fixed denitrifying bacterium |
| CN109504672A (en) * | 2019-01-17 | 2019-03-22 | 中南大学 | A kind of acidophilus leaching microbacteria embedding body and preparation method thereof |
| CN109504672B (en) * | 2019-01-17 | 2022-10-04 | 中南大学 | Acidophilic leaching ore microorganism embedding body and preparation method thereof |
| CN111484123A (en) * | 2020-05-06 | 2020-08-04 | 北京工业大学 | Efficient nitrifying embedded bioactive filler and preparation method thereof |
| CN111470625A (en) * | 2020-05-06 | 2020-07-31 | 北京工业大学 | Preparation and application of anaerobic hydrolysis acidification composite bacteria embedded bioactive filler |
| CN111484123B (en) * | 2020-05-06 | 2022-03-29 | 北京工业大学 | Efficient nitrifying embedded bioactive filler and preparation method thereof |
| CN114426696A (en) * | 2020-09-18 | 2022-05-03 | 中国石油化工股份有限公司 | Polyurethane filler and preparation method and application thereof |
| CN114426696B (en) * | 2020-09-18 | 2023-05-12 | 中国石油化工股份有限公司 | Polyurethane filler and preparation method and application thereof |
| CN112723530A (en) * | 2020-12-11 | 2021-04-30 | 温州大学 | Preparation method of immobilized composite filler |
| CN117658320A (en) * | 2024-01-24 | 2024-03-08 | 中国人民大学 | Preparation method of sodium alginate-polyurethane filler fixed particle anaerobic ammonia oxidation sludge, product and application thereof |
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Application publication date: 20140730 |