CN103951073B - The preparation of a kind of ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier and application - Google Patents
The preparation of a kind of ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier and application Download PDFInfo
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- CN103951073B CN103951073B CN201410137191.6A CN201410137191A CN103951073B CN 103951073 B CN103951073 B CN 103951073B CN 201410137191 A CN201410137191 A CN 201410137191A CN 103951073 B CN103951073 B CN 103951073B
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- oxidizing 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
Abstract
A kind of ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier, prepare and apply, belonging to water-treatment technology field.Star biological active filling material is by embedding body and carrier two parts form；Carrier is with polyethylene, polypropylene as main material, and adds the polyvinyl alcohol water wetted material stellate reticulum carrier through hot melt or sheet material hot pressing；The network structure of carrier, can make embedding body run through mesh and form rivet clasp structure and increase filler stability in the large；Embedding liquid is mixed by ammonia oxidizing bacteria concentrated solution and poly-vinyl alcohol solution and forms；Embedding liquid is spread evenly across on mesh carrier, forms embedding body, and be incorporated into mesh carrier and obtain ammonia oxidizing bacteria biological active filling material after boric acid secondary cross-linking.Ammonia oxidizing bacteria immobilization star biological active filling material prepared by the present invention, not only solves the problems such as the foundation of ammonia oxidizing bacteria advantage is difficult, be easy to run off, and improves reactor for treatment ability, shorten the startup time, have broad application prospects.
Description
Technical field
The present invention relates to water treatment field, particularly to a kind of ammonia oxidizing bacteria immobilization star based on mesh carrier
The preparation of shape biological active filling material and application.
Background technology
Now, ammonia and nitrogen pollution problem is increasingly severe, and ammonia nitrogen becomes the binding target that 12 reductions of discharging are new, promotes
The ammonia and nitrogen pollution level of preventing and treating becomes the necessary behave improving quality of water environment.At present, ammonia nitrogen waste water treatment method divides
For three major types, physico-chemical process, biochemical process and advanced oxidation processes.Biochemical process is due to technical maturity, stable performance, quilt
It is known as being a kind of economy, effective and the most rising method.Biochemical process includes activated sludge process and biology
Embrane method.Traditional activated sludge process keeps amount of bacteria by sludge reflux, wants to obtain high efficiency and be necessary for increasing
Big capacity of returns keeps high bacterial concentration, so will result in operating cost and rises, it is clear that be actual.It addition,
The generation cycle of nitrobacteria is long, and proliferation rates is slow, causes nitrobacteria concentration in reactor low, treatment effeciency
It is difficult to improve.Big by seasonal effect.Summer temp raises, and biochemical speed is fast, and to winter, big portion, the north
Point Sewage Plant all can face thread microbial sludge bulking problem, causes nitrifier to be run off, and then causes water outlet
Ammonia nitrogen exceeds standard.Accordingly it is contemplated that application biomembrance process makes up the shortcoming in activated sludge process, but biomembrane
Method is also problematic, and for nitrobacteria, owing to self film forming ability is poor, the natural membrane time is very
Long, and, natural membrane non-selectivity, it is difficult to form highdensity flora advantage.Various reasons shows, passes
System biochemical process is unable to reach efficient nitrification efficiency.
Nitration reaction is ammonia oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) has acted on jointly
, ammonium oxidation is become sub-nitrogen by AOB, and Asia nitrogen is further converted into nitrate nitrogen by NOB.Short distance nitration is also known as Asia
Nitrification, this technique can reduce 25% nitrogen oxygen demand, the denitrifying carbon source of 40%, the sludge yield of 50% and
Denitrification pool volume.
Microbial cell immobilization technology can increase substantially microorganism concn, makes microorganism not easily run off, contracts
Short reaction device starts time, mithridatism and acid and alkali-resistance, salt resistance ability and is remarkably reinforced, and energy purification and creation characteristic are thin
The ecological dominance of bacterium, produces characteristic highly effective reaction, demonstrates good application prospect.Microbial cell is commonly used
Process for fixation has absorption method, cross-linking method and investment.Wherein, the most commonly used with investment, the most successfully use
In microbial cell embedding material have: polyvinyl alcohol, agar, K carrageenan, gelatin, sodium alginate, poly-third
Acrylamide, polyurethane etc..Above-mentioned embedded material has microorganism avirulence, mass-transfer performance is good, be difficult to be given birth to
The feature such as thing decomposition, stable in properties, mechanical strength height, life-span length, price are low.
At present, traditional antibacterial embedding method is to be combined with embedded material by antibacterial, forms embedding body,
Such as microsphere, embedded block etc..The method is simple to operate, but limitation is big, it is impossible to ideal application to engineering is actual
In the middle of.We study through for many years, improve on traditional embedding method, are combined with carrier by embedding body
Together, overall biological active filling material is formed.Due to embedding body and the combination of carrier, make biological activity
Filler has more performance, and it inherits all advantages of original simple antibacterial and embedded material；Due to carrier
The application of material makes biological active filling material have the characteristic that various carrier is had, such as easy mobility, specific surface
The advantage such as long-pending big, to be not easily blocked；Also can make as required can formula floated, precipitable, floatability formula or
Region " fixed " etc. has the various forms of biological active filling materials of other function.Experimentation shows, profit
By conventional carriers such as existing Raschig ring, Pall ring, cascade ring, suspension modified fillers with embedding body by adhering to
Mode combines prepared biological active filling material, and all to there is stability in the large poor, and embedding body easily comes off, and causes
The problems such as antibacterial loss.
For the problems referred to above, the immobilized biological activated filler that we develop a kind of stability in the large good has extensively
General application prospect.
Summary of the invention
It is an object of the invention to develop a kind of ammonia oxidizing bacteria immobilization star based on mesh carrier biological
Active filler, the network structure design of this biological active filling material carrier, make embedding body be formed by mesh and carrier
Overall rivet clasp structure, embeds body difficult drop-off, and embeds physical ability and formed millimetre-sized thin in network structure
Membrane structure, makes the ammonia oxidizing bacteria biological active filling material stability in the large prepared good, and overall permeability is good, mass transfer
Effect is higher.Mesh carrier is designed as star, is in puffy between ammonia oxidizing bacteria biological active filling material all the time
State, does not haves filler blocking, current short circuit problem, and the embedding body on each fin will not be by the external world
Friction, it is ensured that ammonia oxidizing bacteria concentration, biological active filling material treatment effeciency is high, nitrosation stable performance.
Short-cut nitrification technology has not only been saved the energy and has been also reduced expense.
In order to realize above-mentioned state, present invention employs techniques below scheme.
The preparation of a kind of ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier, its feature exists
In: based on polyethylene, polrvinyl chloride, polypropylene, ABS resin macromolecular material, add 6wt% 9wt%
Polyvinyl alcohol (PVA) water wetted material, makes the netted load of sheet shape by strand hot melt or sheet material hot pressing pore-forming mode
Body, the mesh sheet of composition star carrier, its a length of 0.5 3cm, a width of 0.5 3cm；String diameter is 0.5 2mm；Net
Kong Kewei square, rhombus, rectangle, circle；If by the mesh carrier of dry tablet shape according to different angles by heat
Molten extruding, the mode such as bonding make stellate reticulum carrier (see figure), between adjacent two blade shape mesh carriers
Angle is equal, such as three, four, five, six mesh carriers, be respectively adopted 120 °, 90 °, 72 °,
The angle of 60 ° makes difformity stellate reticulum carrier；Mesh sheet quantity is advisable with 36；With municipal wastewater treatment plant
Second pond excess sludge is bacterium source, by the ammonia oxidizing bacteria bacteria suspension centrifugal concentrating after screening enrichment culture, obtains
108‐1010The ammonia oxidizing bacteria concentrated solution of individual/mL；According to polyvinyl alcohol boric acid secondary cross-linking method, by ammonia oxygen
Change antibacterial concentrated solution and poly-vinyl alcohol solution mixing, and add calcium carbonate be prepared as embed liquid, polyvinyl alcohol quality
Concentration is 80 100g/L, and calcium carbonate mass concentration is 10 40g/L；Above-mentioned embedding liquid is uniformly coated on netted
On carrier, putting in saturated boric acid solution after 1 3h, regulation boric acid solution pH, to 8 10, cross-links 3 24h.
It is drawn off, cleans remained on surface material, obtain ammonia oxidizing bacteria biological active filling material.
Above-mentioned ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier processes for water.
Ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier of the present invention useful
Effect is mainly reflected in:
The most cancellated design, makes ammonia oxidizing bacteria embedding body be formed the rivet clasp structure of entirety by mesh and carrier,
Embedding body difficult drop-off, makes the ammonia oxidizing bacteria biological active filling material stability in the large prepared good, is conducive to
Keeping higher ammonia oxidizing bacteria concentration, nitrosation efficiency is high；
2. mesh carrier is designed as star, and this structure ensure that the bag between ammonia oxidizing bacteria biological active filling material fin
Bury body to be rubbed by the external world, be conducive to keeping higher ammonia oxidizing bacteria concentration, ammonia oxidizing bacteria
Biological active filling material nitrosation efficiency is high, stable performance；
3. experimentation shows, is the carrier immobilized ammonia oxidizing bacteria biological active filling material obtained with conventional filler,
Poor stability, in 2 days, embedded material almost all comes off, and the ammonia oxygen obtained with mesh carrier immobilization
Changing bacterium living beings active filler stability in the large good, the filler life-span is more than 3 years；
4. the ammonia oxidizing bacteria biological active filling material that immobilization prepares, overall proportion is between 0.91 1.10, at air stripping
Act on fluidization state good, there is not corner and pile up, the problems such as current are short-circuit；
5. mesh carrier is main material by polyethylene, polrvinyl chloride, polypropylene, ABS resin, with the addition of
Polyvinyl alcohol (PVA) water wetted material of 5wt% 10wt%, improves the hydrophilic of carrier, adds load
Body and the intensity of embedding body bonding, improve the stability of entirety；
6. ammonia oxidizing bacteria biological active filling material is permissible owing to the existence of mesh skeleton structure makes ammonia oxidizing bacteria embed body
Realize structural thickness less while the most do not lose overall structure to water process running environment variability, less
Thickness can realize higher mass-transfer efficiency and the embedding higher utilization rate of body, if using ammonia oxidizing bacteria bag
Bury body own material to make such thickness and cannot realize good filler in water treatment technology processing unit
Energy；
7. ammonia oxidizing bacteria immobilized biological activated filler bag bacterium amount is big, can set up ammonia oxidizing bacteria flora advantage, can
Realizing short distance nitration, nitrosation efficiency is high；
8. all effective areas of the surface area of biological active filling material, it is to avoid the waste of material；
9. ammonia control can be oxidized to sub-nitrogen by ammonia oxidizing bacteria population advantage, it is achieved short distance nitration has not only saved energy
Source also reduces expense.
Accompanying drawing explanation
Fig. 1 is ammonia oxidizing bacteria star biological active filling material fin schematic diagram；
Fig. 2 is I I generalized sections；
Fig. 3 is II II generalized sections；
Fig. 4,5,6,7 are ammonia oxidizing bacteria star biological active filling material schematic diagram.
1. twine in figure, 2. embedding body.
Detailed description of the invention
Below in conjunction with case study on implementation, the present invention is more specifically described, but embodiments of the present invention do not limit
In this.
Embodiment 1
1. the preparation of mesh carrier
With high molecular polymers such as polypropylene as main material, add the polyvinyl alcohol (PVA) of 10wt%,
Make the sheet shape mesh carrier of a length of 2.0cm, a width of 1.5cm.Mesh form is square, and the length of side is
2mm, string diameter is 1.55mm.By six sheet above shape carriers by hot melt, bonding formation angle 60
Stellate reticulum carrier.
2. the process of ammonia oxidizing bacteria
With municipal wastewater treatment plant second pond excess sludge for bacterium source, by the ammonia oxidizing bacteria after screening enrichment culture
Bacteria suspension centrifugal concentrating, obtains 4.0 × 109The ammonia oxidizing bacteria concentrated solution of individual/mL.
3. the acquisition of ammonia oxidizing bacteria embedding liquid
Weighing polyvinyl alcohol 5kg, adds 25L ultra-pure water post-heating and dissolves 15min to 90 DEG C, and taking-up is stirred
It is again heated to 90 DEG C after mixing uniformly and dissolves 5min, stir after taking-up and be cooled to 30 DEG C, by 25L
Poly-vinyl alcohol solution and the 25L bacteria suspension mixing prepared, and add 1kg calcium carbonate, after stirring
Make 50L and embed liquid.
4. embedding liquid and the combination of mesh carrier
Embedding liquid is uniformly coated on mesh carrier surface, it is ensured that the mesh carrier surface liquid that is all embedded covers
Lid is uniformly.
5. the preparation of ammonia oxidizing bacteria biological active filling material
The mesh carrier smearing embedding body in step (4) is put in saturated boric acid solution so that it is be in and flood
Ning state, stand 3h, regulation pH value of solution, to 9.0, stands 4h and completes immobilization, clean, obtain ammonia
Oxidizing bacteria biological active filling material, this biological active filling material proportion is between 0.95 1.05.
6. the application of biological active filling material activity
To 1m3Reactor in add embedded above-mentioned nitrification biological active filling material, filling rate is 40%,
Water temperature 20 ± 2 DEG C, HRT=4h, pH are 7.8 8.3, and dissolved oxygen controls at 1.5 2mg/L, NH4 +‐N
Concentration is 160mg/L, and biological active filling material becomes suspension fluidization state under the effect of air stripping, and filler
Between will not phase mutual friction, measure the nitrification effect of reactor on time.Water outlet testing result shows, reaction
Device returns to 96.5% of the nitrification activity before embedding, NH after cultivating 1 week4 +N concentration 5mg/L with
Under, clearance is more than 96.8%, and sub-nitrogen accumulation rate is all more than 90%, it is achieved that short distance nitration, fortune
Row after 1 year still without embedding body obscission, nitrosation stable performance.
Embodiment 2
1. the preparation of mesh carrier
With high molecular polymers such as polyethylene as main material, add water wetted material polyvinyl alcohol (PVA),
Make a length of 2.0cm, the sheet shape mesh carrier of a width of 1.0.Mesh form is rectangle, a length of 2mm,
A width of 1.5mm, string diameter is 1mm.By five sheet above shape carriers by hot melt, bonding formation angle
The stellate reticulum carrier of 72.
2. the process of ammonia oxidizing bacteria
With municipal wastewater treatment plant second pond excess sludge for bacterium source, by the ammonia oxidizing bacteria after screening enrichment culture
Bacteria suspension centrifugal concentrating, obtains 3.0 × 109The ammonia oxidizing bacteria concentrated solution of individual/mL.
3. the acquisition of ammonia oxidizing bacteria embedding liquid
Weighing polyvinyl alcohol 5kg, adds 25L ultra-pure water post-heating and dissolves 15min to 90 DEG C, and taking-up is stirred
It is again heated to 90 DEG C after mixing uniformly and dissolves 5min, stir after taking-up and be cooled to 30 DEG C, by 25L
Poly-vinyl alcohol solution and the 25L bacteria suspension mixing prepared, and add 1kg calcium carbonate, after stirring
Make 50L and embed liquid.
4. ammonia oxidizing bacteria embedding liquid and the combination of mesh carrier
Ammonia oxidizing bacteria is embedded liquid and is uniformly coated on mesh carrier surface, it is ensured that mesh carrier surface is whole
The liquid that is embedded covers uniformly.
5. the preparation of ammonia oxidizing bacteria biological active filling material
The mesh carrier smearing embedding liquid in step (4) is put in saturated boric acid solution so that it is be in and flood
Ning state, stand 3h, regulation pH value of solution, to 9.0, stands 4h and completes immobilization, clean, obtain ammonia
Oxidizing bacteria biological active filling material, this biological active filling material proportion is between 0.98 1.10.
6. the application of ammonia oxidizing bacteria biological active filling material activity
To 1m3Laboratory in ripe A2The Aerobic Pond of O reactor adds embedded star ammonia oxygen
Changing bacterium living beings active filler, filling rate is 40%, water temperature 20 ± 2 DEG C, HRT=2h, and dissolved oxygen is
1.0 1.5mg/L, influent quality is city domestic sewage (NH4 +N concentration is 40 70mg/L), survey on time
Determining the nitrification ability of Aerobic Pond, testing result shows, reactor reaches steady statue after cultivating 1 week,
Water outlet NH4 +N concentration at below 5mg/L, clearance more than 90%, sub-nitrogen accumulation all 98% with
On.Still without embedding body obscission, nitrosation effect stability after running 1 year.
Examples detailed above shows, utilizes mesh carrier to carry out ammonia oxidizing bacteria immobilization and prepares biological active filling material
Operating process is simple, the overall rivet clasp structure that embedding body is formed by mesh with carrier, makes the ammonia oxygen prepared
Change bacterium living beings active filler stability in the large is good, embedding body difficult drop-off, and ammonia oxidizing bacteria concentration is higher,
Form dominant population, can return to embed the 96.5% of front nitrification activity, short distance nitration after running 1 week
Effect stability, and this biological active filling material good stability, service life is long, has preferable application prospect.
Claims (5)
1. the preparation method of an ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier, it is characterised in that: include
Following steps: based on polyethylene, polrvinyl chloride, polypropylene or ABS resin macromolecular material, add 6wt%-9wt%
Polyvinyl alcohol (PVA) water wetted material, makes sheet shape mesh carrier by strand hot melt or sheet material hot pressing pore-forming mode, if will
Dry tablet shape mesh carrier according to different angles by hot melt extruded, bonding by the way of make stellate reticulum carrier, adjacent two blade
Angle between shape mesh carrier is equal, with municipal wastewater treatment plant second pond excess sludge for bacterium source, after screening enrichment culture
Ammonia oxidizing bacteria centrifugal concentrating, obtains 108-1010The ammonia oxidizing bacteria concentrated solution of individual/mL, according to polyvinyl alcohol-boric acid secondary
Cross-linking method, mixes ammonia oxidizing bacteria concentrated solution and poly-vinyl alcohol solution, and adds calcium carbonate and be prepared as embedding liquid, poly-second
Enol mass concentration is 80-100g/L, and calcium carbonate mass concentration is 10-40g/L, is uniformly coated on netted by above-mentioned embedding liquid
On carrier, put in saturated boric acid solution after 1-3h, regulate boric acid solution pH to 8-10, cross-link 3-24h, be drawn off,
Clean remained on surface material, obtain ammonia oxidizing bacteria immobilization star biological active filling material based on mesh carrier.
2. according to the preparation method of claim 1, it is characterised in that: the mesh sheet of composition star carrier, its a length of 0.5-3cm, a width of
0.5-3cm, string diameter is 0.5-2mm, and mesh is square, rhombus, rectangle or circle.
3. according to the preparation method of claim 1, it is characterised in that: sheet shape mesh carrier quantity is 3-6 sheet, three, four, five
Sheet, six mesh carriers, be respectively adopted 120 °, 90 °, 72 °, the angle of 60 ° make difformity stellate reticulum carry
Body.
4. the ammonia oxidizing bacteria immobilization star based on mesh carrier prepared according to the method described in any one of claim 1-3 is raw
Thing active filler.
5. the ammonia oxidizing bacteria immobilization star based on mesh carrier prepared according to the method described in any one of claim 1-3 is raw
Thing active filler processes for water.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746881A (en) * | 2009-12-11 | 2010-06-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Honeycomb network pipe bio-carrier |
| CN103193315A (en) * | 2013-04-12 | 2013-07-10 | 北京工业大学 | Method for preparing bioactive filler through immobilization of anaerobic ammonia oxidizing bacterium |
| CN103657399A (en) * | 2012-09-06 | 2014-03-26 | 中国石油化工股份有限公司 | Preparation method of macromolecule activated carbon composite filler |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746881A (en) * | 2009-12-11 | 2010-06-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Honeycomb network pipe bio-carrier |
| CN103657399A (en) * | 2012-09-06 | 2014-03-26 | 中国石油化工股份有限公司 | Preparation method of macromolecule activated carbon composite filler |
| CN103193315A (en) * | 2013-04-12 | 2013-07-10 | 北京工业大学 | Method for preparing bioactive filler through immobilization of anaerobic ammonia oxidizing bacterium |
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