CN103951082A - Preparation and application of denitrifying bacteria immobilized fixed-type bioactive fillers with textile fabrics and polyvinyl alcohol non-woven fabrics as carriers - Google Patents
Preparation and application of denitrifying bacteria immobilized fixed-type bioactive fillers with textile fabrics and polyvinyl alcohol non-woven fabrics as carriers Download PDFInfo
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- CN103951082A CN103951082A CN201410137280.0A CN201410137280A CN103951082A CN 103951082 A CN103951082 A CN 103951082A CN 201410137280 A CN201410137280 A CN 201410137280A CN 103951082 A CN103951082 A CN 103951082A
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- polyvinyl alcohol
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- woven fabrics
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- denitrifying bacterium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses preparation and an application of denitrifying bacteria immobilized fixed-type bioactive fillers with textile fabrics and polyvinyl alcohol non-woven fabrics as carriers, and belongs to the technical field of water treatment. Each fixed-type bioactive filler is composed of the carrier and an embedding body; the carrier is prepared by overlaying multiple layers of polyvinyl alcohol non-woven fabrics and one layer of textile fabric; an embedding liquid is formed by mixing a polyvinyl alcohol solution and a denitrifying bacteria concentrated solution, and the embedding body is formed by boric acid cross-linking curing of the embedding liquid; the carrier is soaked in the embedding liquid, through boric acid secondary cross-linking, the non-woven fabrics and the embedding body are firmly bound together, the embedding body penetrates through textile fabric meshes to form a riveting fixing structure, and the good tensile property of the textile fabric improves the overall stability of the filler. The prepared bioactive fillers are fixed on the prefabricated frame. The prepared denitrifying bacteria immobilized fixed-type bioactive fillers are good in overall stability and good in process performance, can establish and maintain flora advantages of the denitrifying bacteria in a short period of time, and maintain an efficient denitrification ability of a system.
Description
Technical field
The invention belongs to water treatment field, relate to a kind of denitrifying bacterium immobilization fixed type biological active filler preparation and application that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier of take.
Background technology
Along with growing interest and the great attention to water body polluted by nitrogen problem both at home and abroad, the Effluent criteria of sewage work is strict all the more.Wastewater treatment in China factory generally requires strict implement < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level A standard.Yet the denitrification effect of existing technique is difficult to reach total nitrogen (TN) and proposes target requirement, must upgrade to prior art.
Water body denitrification technology comprises physico-chemical processes and biological process.Although physico-chemical processes is simple, easily causes secondary pollution.Sewage work adopts biological process mostly at present.Traditional biological denitrogenation refers to that the effect by nitrobacteria is nitric nitrogen by mineralized nitrogen under aerobic condition, then the effect by denitrifying bacterium is converted into nitrogen by nitric nitrogen under anoxia condition.
Recently autotrophic denitrification bacterium and aerobic denitrifying bacteria have been found in research, have widened the applicable elements of denitrifying bacterium.But both Main Bottlenecks are that denitrifying bacterium growth is slower at present, the reactor start-up time is long and denitrification ability is lower.The further research and practice checking of still needing of its large-scale promotion application.Therefore, China Ge great water factory still generally utilizes heterotrophic denitrification bacterium under anoxia condition, to carry out biological denitrificaion at present, and main technique form is activated sludge process.
According to the practical operation situation of most domestic sewage work, show that in Sludge System denitrification process, often there are the following problems: denitrifying bacterium is difficult to form stronger flora advantage under state-of-the-art, the reactor start-up time is long, and nitric efficiency is low; Compare with biomembrance process, system capacity of resisting impact load is poor; A large amount of denitrifying bacteriums are under high density, and settling tank position is prone to mud and is megalump floating, and effluent quality is produced to considerable influence etc.
Microorganism cells immobilization technology significantly improves for water treatment field attention rate in recent years.This technology can significantly improve the concentration of functional microorganism in system at short notice, set up and maintain the ecological dominance of stable functional microorganism, produce the substance metabolism process of expection, shorten the start time of reactor, obviously strengthen the adaptive faculty that former water potential of hydrogen, toxicity, salinity etc. are changed, in water treatment field, demonstrate huge application prospect.
Common microbial cell immobilization method comprises absorption method, crosslinking and entrapping method.The fixing microbial biomass of absorption method is few, and the bonding force between microorganism and absorption carrier is not strong; Crosslinking has impact to microbic activity, and linking agent is more expensive.The most conventional with entrapping method at present.Traditional bacterium embedding method is that bacterium and embedded material are combined, and forms embedding body, such as microballoon, embedded block etc.This method is simple to operate, but limitation is large, and embedding body itself lacks the structural advantage that water treatment filler has, and practical application effect is undesirable.And utilize the conventional filler such as Raschig ring, Pall ring, cascade ring and embedding body to combine by adhesion mode the biological active filling material making, there is the problems such as resistance to overturning is poor, embedding body easily comes off, the easy loss of bacterium.
For the problems referred to above, we organically combine bacterium embedding and carrier filler, that develops that a kind of resistance to overturning is good, processing performance is good take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, in water treatment denitrogenation field, is with a wide range of applications.
Summary of the invention:
The object of the invention is to develop a kind of preparation method of take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, utilize the method to prepare the denitrifying bacterium immobilization fixed type biological active filler that a kind of resistance to overturning is good, processing performance is good, be placed in water processing reactor, be applied to water treatment denitrogenation field, set up at short notice and maintain the flora advantage of denitrifying bacterium, maintain the denitrifying capacity of system high efficiency.This biological active filling material carrier adopts the non-woven fabrics that main component is polyvinyl alcohol fiber, multi-layer nonwoven fabrics and one deck yarn fabric are superimposed, smearing embedding body and the non-woven fabrics that the denitrifying bacterium embedding liquid on it solidify to form through peroxyboric acid secondary crosslinking is bonded together securely, the advantages such as embedding body layer forms rivet clasp structure by yarn fabric mesh, and it is long that the biological active filling material of preparing has that resistance to overturning is good, anti-current-rush ability strong, denitrifying bacterium superiority Time Created is short and denitrifying bacterium flora advantage is held time.In addition, the immobilized biological activated filler of denitrifying bacterium is placed in water processing reactor after fixing by precast frame, and filler can not run off with current, denitrification effect stability.In order to realize above-mentioned state, the present invention has adopted following technical scheme.
A kind ofly take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: the carrier that the multi-layer nonwoven fabrics of this biological active filling material and one deck yarn fabric are superimposed is by the embedding of denitrifying bacterium embedding body, embedding carrier forms the immobilized biological activated filler of denitrifying bacterium with yarn fabric for being supported and fixed on precast frame, between non-woven fabrics and non-woven fabrics, all have embedding body between non-woven fabrics and yarn fabric.The thickness of carrier after by the embedding of embedding body, a layer Direction of superposition is 3.5mm-11mm.The immobilized biological activated filler of some denitrifying bacteriums be take yarn fabric and is fixed on precast frame obliquely as supports parallel.
A kind of concrete preparation process of take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier is as follows:
(1), by the denitrifying bacterium bacteria suspension centrifugal concentrating obtaining after enrichment culture denitrifying bacterium, obtaining bacterial count magnitude is 10
8-10
9denitrifying bacterium concentrated solution;
(2) polyvinyl alcohol is added to the water, is heated to 90 ℃ of dissolvings, take out and stir and be cooled to 31 ℃ ± 1 ℃, obtain polyvinyl alcohol solution;
(3) polyvinyl alcohol solution of preparation is mixed with denitrifying bacterium concentrated solution, in embedding liquid, polyvinyl alcohol mass concentration is 80-150g/L;
(4) multilaminar polyethylene alcohol non-woven fabrics and one deck yarn fabric are stacked, obtain embedding carrier; Embedding carrier is soaked in to 15min in embedding liquid, then be placed in saturated boric acid and take out after crosslinked 1.5h, regulate boric acid solution pH value between 8-10, to carry out secondary crosslinking, the secondary crosslinking time is 5h, secondary crosslinking finishes with clear water, to rinse afterwards, obtains take the immobilized biological activated filler of denitrifying bacterium that yarn fabric and polyvinyl alcohol non-woven fabrics are carrier.
(5) (precast frame is square or rectangular parallelepiped to utilize yarn fabric to be fixed on precast frame the immobilized biological activated filler of some denitrifying bacteriums, the length of framework all can be 0.5m-2m) upper, complete and take the preparation process of the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier.
The active filler of denitrifying bacterium immobilization fixed type biological is placed in water processing reactor, is applied to water treatment denitrogenation field.
Beneficial effect of take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier of the present invention is mainly reflected in:
1. carrier adopts the non-woven fabrics that main component is polyvinyl alcohol fiber, multi-layer nonwoven fabrics and one deck yarn fabric are superimposed, smearing embedding body and the non-woven fabrics that the denitrifying bacterium embedding liquid on it solidify to form through peroxyboric acid secondary crosslinking is bonded together securely, embedding body layer forms rivet clasp structure by yarn fabric mesh, embedding body difficult drop-off, biological active filling material can steady running more than 3 years;
2. adopt yarn fabric intensity high, acid and alkali-resistance ability is strong, and the immobilized biological activated filler anti-current-rush of the denitrifying bacterium ability of preparation is strong;
3. embedding body layer forms rivet clasp structure by yarn fabric mesh, because the existence of mesh skeleton structure makes embedding body implementation structure thickness less, do not lose the adaptability that one-piece construction changes water treatment running environment simultaneously, less thickness can be realized higher mass-transfer efficiency and the higher utilization ratio of embedding body, if make thickness like this with embedding body self material, cannot in water technology processing unit, realize good carrier performance;
4. the immobilized biological activated filler effective ratio area of denitrifying bacterium is large, substrate mass transfer effect is good, can significantly improve at short notice the concentration of denitrifying bacterium in system, set up and maintain the ecological dominance of stable denitrifying bacterium, the start time that shortens reactor, maintain efficient denitrifying capacity;
5. after the immobilized biological activated filler of denitrifying bacterium is fixed by precast frame, be placed in water processing reactor, filler can not run off with current, denitrification effect stability, and denitrifying bacterium is fixed on biological active filling material, there will not be sludge bulking and On The Floating in activated sludge process.
Accompanying drawing explanation
Fig. 1 is denitrifying bacterium immobilization fixed type biological active filler integral body and partial cutaway schematic, and in figure: 1 is non-woven fabrics, 2 is embedding body, and 3 is yarn fabric, and 4 is precast frame.
Embodiment
Below in conjunction with case study on implementation, the present invention is further described in detail, but embodiments of the present invention are not limited to this.
Embodiment 1
1. the preparation of denitrifying bacterium concentrated solution
Yi Mou municipal sewage plant second pond excess sludge is bacterium source, enrichment culture denitrifying bacterium, and by the denitrifying bacterium bacteria suspension centrifugal concentrating obtaining after cultivating, obtaining bacterial number is 3.5 * 10
9the denitrifying bacterium concentrated solution of individual/mL, gets 50L standby.
2. the preparation of denitrifying bacterium embedding liquid
Get 10kg polyvinyl alcohol and be added in 50L water, heating in water bath to 90 ℃ dissolving, stirs after taking-up and is cooled to 30 ℃, obtains polyvinyl alcohol solution; The 50L polyvinyl alcohol solution of preparation and 50L denitrifying bacterium concentrated solution are mixed, make 100L denitrifying bacterium embedding liquid after stirring, in embedding liquid, polyvinyl alcohol mass concentration is 100g/L.
3. take the preparation of the immobilized biological activated filler of denitrifying bacterium that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier
Four layers of polyethylene alcohol non-woven fabrics and one deck yarn fabric (each two-layer nonwoven of yarn fabric both sides) are stacked, obtain embedding carrier; Embedding carrier is placed in to embedding liquid and soaks 15min, then be placed in saturated boric acid and take out after crosslinked 1.5h, regulate boric acid solution pH value to 9.0 to carry out secondary crosslinking, the secondary crosslinking time is 5h, secondary crosslinking finishes rear with clear water flushing, obtains the immobilized biological activated filler of denitrifying bacterium.
4. the preparation of denitrifying bacterium immobilization fixed type biological active filler
Utilize yarn fabric by the immobilized biological activated filler parallel oblique of the denitrifying bacterium making be fixed on precast frame, complete the preparation process of fixed nitrobacteria biological active filling material, the long 1.2m of filler, wide 0.5m, average thick 6mm, totally 40; Be arranged in parallel, spacing is 2cm; Filler slant setting, broadside is placed in level, and long limit and horizontal plane form angle; Being fixed on long is 1m, wide on 0.5m, the high precast frame for 0.8m.
5. the application of denitrifying bacterium immobilization fixed type biological active filler
By the active filler of obtained denitrifying bacterium immobilization fixed type biological be placed in useful volume be 720L(long be 1.2m, wide be 0.6m, available depth is 1m) upward flow cubes reactor bottom mid-way (the long limit of framework is parallel with the long limit of reactor).Water inlet adopts artificial distribution, take sodium acetate as carbon source, NO
3 --N150 ± 10mg/L, C/N=10(carbon source is sufficient), pH7.3-7.5, DO0-0.5mg/L, 25 ± 1 ℃ of water temperatures, HRT=2h.Every day is the denitrifying capacity of sampling and measuring system on time.Detected result shows, reactor reaches steady state after moving 1 week, water outlet NO
3 --N, NO
2 --N concentration is all below 2mg/L, and denitrification percent is more than 97.1%.Reactor moves 1 year continuously, and denitrifying bacterium immobilization fixed type biological active filler embedding body serviceability rate is 90%, denitrification effect stability.
Above-mentioned example shows, the active filler of denitrifying bacterium immobilization fixed type biological is placed in water processing reactor, can set up at short notice the flora advantage of denitrifying bacterium, shortens the start time of reactor, improves the denitrifying capacity of system; System can keep higher denitrifying bacterium concentration for a long time, maintains efficient denitrifying capacity; Embedding body difficult drop-off, the filler life-span is longer; Filler can not run off with current, has a good application prospect.
Claims (6)
1. take the preparation method of the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: the method concrete steps are as follows:
(1), by the denitrifying bacterium bacteria suspension centrifugal concentrating obtaining after enrichment culture denitrifying bacterium, obtaining bacterial count magnitude is 10
8-10
9denitrifying bacterium concentrated solution;
(2) polyvinyl alcohol is added to the water, is heated to 90 ℃ of dissolvings, take out and stir and be cooled to 31 ℃ ± 1 ℃, obtain polyvinyl alcohol solution;
(3) polyvinyl alcohol solution of preparation is mixed with denitrifying bacterium concentrated solution, in embedding liquid, polyvinyl alcohol mass concentration is 80-150g/L;
(4) multilaminar polyethylene alcohol non-woven fabrics and one deck yarn fabric are stacked, obtain embedding carrier;
(5) embedding carrier is soaked in to 15min in embedding liquid, then be placed in saturated boric acid and after crosslinked 1.5h, take out and regulate boric acid solution pH value between 8-10, to carry out secondary crosslinking, the secondary crosslinking time is 5h, secondary crosslinking finishes rear with clear water flushing, then utilizes yarn fabric to be fixed on precast frame.
2. according to claim 1 preparation a kind of, take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: the carrier that the multi-layer nonwoven fabrics of this biological active filling material and one deck yarn fabric are superimposed is by the embedding of denitrifying bacterium embedding body, embedding carrier forms the immobilized biological activated filler of denitrifying bacterium with yarn fabric for being supported and fixed on precast frame, between non-woven fabrics and non-woven fabrics, all have embedding body between non-woven fabrics and yarn fabric.
3. according to claim 1 preparation a kind of, take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: the thickness of carrier after by the embedding of embedding body, a layer Direction of superposition is 3.5mm-11mm.
4. according to claim 1 preparation a kind of, take the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: the immobilized biological activated filler of some denitrifying bacteriums be take yarn fabric and is fixed on precast frame obliquely as supports parallel.
5. precast frame claimed in claim 4, is characterized in that: be square or rectangular parallelepiped, the length of framework all can be 0.5m-2m.
6. according to a kind of described in claim 2-4, take the application of the denitrifying bacterium immobilization fixed type biological active filler that yarn fabric and polyvinyl alcohol non-woven fabrics be carrier, it is characterized in that: add in water processing reactor, be applied to water treatment denitrogenation field.
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| CN201410137280.0A CN103951082B (en) | 2014-04-04 | 2014-04-04 | A kind of denitrifying bacteria immobilization fixed type biological active filler preparation with yarn fabric and polyvinyl alcohol non-woven fabrics as carrier and application |
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| CN201410137280.0A CN103951082B (en) | 2014-04-04 | 2014-04-04 | A kind of denitrifying bacteria immobilization fixed type biological active filler preparation with yarn fabric and polyvinyl alcohol non-woven fabrics as carrier and application |
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| CN111439824A (en) * | 2020-03-06 | 2020-07-24 | 浙江正洁环境科技有限公司 | Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof |
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| 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 |
| CN103194437A (en) * | 2013-04-12 | 2013-07-10 | 北京工业大学 | Method for finishing bacterium fixation by utilizing polyvinyl alcohol-borate secondary crosslinking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111439824A (en) * | 2020-03-06 | 2020-07-24 | 浙江正洁环境科技有限公司 | Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof |
| CN111439824B (en) * | 2020-03-06 | 2022-08-09 | 浙江正洁环境科技有限公司 | Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof |
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Effective date of registration: 20201201 Address after: 414400 100m northwest of the intersection of Longzhou North Road and Longzhou South Road, Miluo City, Yueyang City, Hunan Province Patentee after: Science and technology innovation service center of Hunan Miluo circular economy industrial park Address before: Room 302, No. 8319, Yanshan Road, Bengbu City, Anhui Province Patentee before: Bengbu Lichao Information Technology Co.,Ltd. |