CN114057285B - Nitrosation bacterium film forming method, film forming filler device and application - Google Patents
Nitrosation bacterium film forming method, film forming filler device and application Download PDFInfo
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- CN114057285B CN114057285B CN202111373774.5A CN202111373774A CN114057285B CN 114057285 B CN114057285 B CN 114057285B CN 202111373774 A CN202111373774 A CN 202111373774A CN 114057285 B CN114057285 B CN 114057285B
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- 238000000034 method Methods 0.000 title claims abstract description 80
- 239000000945 filler Substances 0.000 title claims abstract description 60
- 241000894006 Bacteria Species 0.000 title claims abstract description 18
- 238000007034 nitrosation reaction Methods 0.000 title abstract description 24
- 230000009935 nitrosation Effects 0.000 title abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 21
- 241000108664 Nitrobacteria Species 0.000 claims description 16
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 16
- 238000007037 hydroformylation reaction Methods 0.000 claims description 14
- 244000060011 Cocos nucifera Species 0.000 claims description 10
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 10
- 238000005273 aeration Methods 0.000 claims description 9
- 239000001103 potassium chloride Substances 0.000 claims description 8
- 235000011164 potassium chloride Nutrition 0.000 claims description 8
- 239000011780 sodium chloride Substances 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 7
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 7
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 7
- 241001495402 Nitrococcus Species 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 6
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000002068 microbial inoculum Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 abstract description 16
- 238000001179 sorption measurement Methods 0.000 abstract description 15
- 239000002131 composite material Substances 0.000 abstract description 12
- 230000035939 shock Effects 0.000 abstract description 2
- 244000005700 microbiome Species 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 5
- 230000004071 biological effect Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical group BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010382 chemical cross-linking Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- IHCCLXNEEPMSIO-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 IHCCLXNEEPMSIO-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 102000018832 Cytochromes Human genes 0.000 description 1
- 108010052832 Cytochromes Proteins 0.000 description 1
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 244000018633 Prunus armeniaca Species 0.000 description 1
- 235000009827 Prunus armeniaca Nutrition 0.000 description 1
- 240000008866 Ziziphus nummularia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/109—Characterized by the shape
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to the technical field of biological denitrification, in particular to a nitrosation bacterium film forming method, a film forming filler device and application. The invention provides a composite filler composed of active carbon, a circular framework and aldehyde fiber, wherein the aldehyde fiber is fixed on the circular framework, the circular framework plays a supporting role, nitrosations are adsorbed and fixed after the aldehyde fiber is compounded with the active carbon, the circular framework in the combination can meet the requirements of a film forming device on mechanical property, shock resistance and the like of the filler, the adsorption capacity of the nitrosations can be obviously improved by adding the active carbon, and meanwhile, spatial grading is formed from the circular framework and the aldehyde fiber to the active carbon, so that the overall performance of the filler is more balanced, the adsorption of the nitrosations is more uniform, the active carbon can penetrate into an aldehyde fiber gap, the adsorption is firmer, and the nitrosations are not easy to fall off.
Description
Technical Field
The invention relates to the technical field of biological denitrification, in particular to a nitrosation bacterium film forming method, a film forming filler device and application.
Background
Nitrogen is one of the main pollutants in water bodies, and untreated nitrogenous wastewater can cause harm to water bodies and other environments. The commonly used denitrification methods are mainly classified into physical and chemical methods (such as a stripping method, an ammonia still distillation method, a break point chlorination method and the like) and biological denitrification methods. The biological denitrification method is a main method for the denitrification treatment of the current wastewater due to mature technology and low investment and operation cost. The microorganism immobilization technology is a method of immobilizing microorganisms in a limited spatial region using chemical or physical means and maintaining their inherent activity. The common microorganism immobilization methods include physical adsorption method, chemical crosslinking method, carrier embedding method, etc., and the characteristics of different immobilization methods are shown in the following table:
table 1 comparison of different microorganism immobilization methods
| Performance of | Physical adsorption method | Chemical crosslinking process | Embedding fixation method |
| Difficulty in preparation | Easy to use | Moderate to moderate | Moderate to moderate |
| Biological activity | High height | Low and low | Moderate to moderate |
| Stability of | Low and low | High height | Moderate to moderate |
| Mass transfer resistance | Small size | Big size | Big size |
| Vector regenerability | Can be used for | Cannot be used | Cannot be used |
The table shows that the physical adsorption method is easy to prepare, high in biological activity and good in carrier regeneration performance, but the microorganisms and the carriers are combined only through physical adsorption, so that the microorganisms and the carriers are easy to fall off when being impacted by water power in the water treatment process, and the stability is poor.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a novel filler for adsorbing nitrosations, so as to improve the stability of film formation of the filler, thereby improving the lasting denitrification capacity of a film formation filler device.
Another object of the present invention is to provide a film forming method of the above-mentioned filler, which is easy and convenient to implement and suitable for popularization, and which can ensure sufficient performance of the film forming stability of the above-mentioned filler.
The invention also aims to solve the technical problem that the long-term stable denitrification film hanging product is lacking at present by using the film hanging filler device provided by the film hanging method for the biological denitrification process.
In order to solve the technical problems and achieve the purposes, the invention provides the following technical scheme:
in a first aspect, the present invention provides a filler for adsorbing nitrosating bacteria, the filler comprising, by mass, 1 to 5 parts of activated carbon, 50 to 60 parts of a circular skeleton and 50 to 60 parts of an hydroformylation fiber; the diameter of the round frameworks is 100-200 mm, the distance between adjacent round frameworks is 20-40 mm, the hydroformylation fibers are fixed on the round frameworks, and the activated carbon is uniformly adsorbed on the hydroformylation fibers and the surfaces of the round frameworks.
In an alternative embodiment, the circular skeleton is made of polyphenylene sulfide (PPS) or Polyethylene (PE).
In an alternative embodiment, the activated carbon is coconut activated carbon.
Preferably, the particle size of the activated carbon is 100-400 mesh.
In a second aspect, the present invention provides the use of a filler according to any of the preceding embodiments in a nitrosation film formation.
In a third aspect, the present invention provides a method for forming a film by using nitrobacteria, the method comprising immersing the filler according to any one of the foregoing embodiments in a nitrobacteria agent to adsorb nitrobacteria, filling the filler adsorbed with nitrobacteria into a film forming device at a filling rate of 50% to 80% by volume, and performing nitrobacteria enrichment film forming on the film forming device.
In an alternative embodiment, the nitrosate is a single-cell nitrite or a nitrosate.
In an alternative embodiment, the enrichment method comprises the steps of carrying out two cycles of periodic treatment on the film hanging device every day, wherein each cycle of periodic treatment sequentially comprises the steps of water inlet, microbial inoculum adding, precipitation and water draining.
Preferably, the water inlet formula of the water inlet process comprises 0.2 to 1.5g/L of ammonium sulfate, 0.5 to 3.69g/L of sodium bicarbonate, 0.02 to 0.16g/L of sodium chloride, 0.01 to 0.07g/L of potassium chloride and anhydrous chlorine0.01 to 0.07g/L of calcium carbide, na 2 HPO 4 ·12H 2 O0.05-0.37 g/L and MgSO 4 ·7H 2 O 0.04～0.26g/L。
Preferably, the water inlet formula of the water inlet process comprises 1.062g/L of ammonium sulfate, 2.637g/L of sodium bicarbonate, 0.115g/L of sodium chloride, 0.053g/L of potassium chloride, 0.053g/L of anhydrous calcium chloride and Na 2 HPO 4 ·12H 2 O0.261 g/L and MgSO 4 ·7H 2 O 0.189g/L。
Preferably, the pH value in the aeration process is 6.5-8.6, and the dissolved oxygen amount is not less than 2mg/L.
In an alternative embodiment, after enrichment is completed, the method further comprises a domestication procedure, wherein the domestication procedure comprises the step of introducing ammonia nitrogen-containing water at a flow rate of 0.5-1.2L/h at a temperature of 25-30 ℃, and the ammonia nitrogen concentration in the ammonia nitrogen-containing water is 250mg/L.
Preferably, the flow rate of the water containing ammonia nitrogen is gradually increased from low to high, the step length is 0.1L/h each time, and after the flow rate is increased each time, the flow rate is increased after the ammonia nitrogen concentration of the effluent is not higher than 5 mg/L.
In a fourth aspect, the present invention provides a film-forming apparatus for covering a nitrosate film obtained by the film-forming method according to any one of the above embodiments.
In a fifth aspect, the present invention provides an application of the film hanging device for covering a nitrosate film in a biological denitrification process according to the foregoing embodiment.
Preferably, the biological denitrification process is applied to a water purification process.
The invention provides a composite filler composed of active carbon, a circular framework and aldehyde fiber, wherein the aldehyde fiber is fixed on the circular framework, the circular framework plays a supporting role, nitrosations are adsorbed and fixed after the aldehyde fiber is compounded with the active carbon, the circular framework in the combination can meet the requirements of a film forming device on mechanical property, shock resistance and the like of the filler, the adsorption capacity of the nitrosations can be obviously improved by adding the active carbon, and meanwhile, spatial grading is formed from the circular framework and the aldehyde fiber to the active carbon, so that the overall performance of the filler is more balanced, the adsorption of the nitrosations is more uniform, the active carbon can penetrate into an aldehyde fiber gap, the adsorption is firmer, and the nitrosations are not easy to fall off.
The invention provides a film-forming method for nitrosating bacteria by using the filler, which is characterized in that the filler is immersed in a nitrosating bacteria agent to adsorb nitrosating bacteria, the filling rate of the filler is controlled to be 50-80% by volume according to the characteristics of the filler, and then nitrosating bacteria enrichment film-forming is carried out on a film-forming device.
The invention also uses the film hanging device for covering the nitrosation bacterial film obtained by the film hanging method for biological denitrification, and through verification, the film hanging device has remarkable purification effect, can efficiently sustain bacteria and resist bad environment, obviously improves the stability of biological denitrification, has good application prospect in low-carbon high-nitrogen wastewater denitrification treatment, and can expand the application of microorganism immobilization technology in the biological denitrification field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of the fiber according to embodiment 1 of the present invention, wherein the fiber is fixed on a circular skeleton;
fig. 2 is a schematic diagram of a filler provided in example 1 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In a first specific embodiment, the present invention provides a filler for adsorbing nitrosations, the filler comprising, in parts by mass, 1 to 5 parts of activated carbon, 50 to 60 parts of a circular skeleton and 50 to 60 parts of an hydroformylation fiber. The diameter of the round frameworks is 100-200 mm, the distance between adjacent round frameworks is 20-40 mm, the hydroformylation fibers are fixed on the round frameworks, and the activated carbon is uniformly adsorbed on the hydroformylation fibers and the surfaces of the round frameworks. The round framework has the function of enabling the filler to meet the requirements of mechanical property, impact resistance and the like required by film formation, and simultaneously preventing the film formation effect from being reduced due to the stacking of aldehyde fibers.
The hydroformylation fiber can be directly fixed on the circular framework, or can be made into fiber bundles and then fixed on the circular framework, and the mode of fixing the hydroformylation fiber or the hydroformylation fiber bundles on the circular framework can be realized by conventional technology, or can be fixed on the circular framework at the end part or at any position on the long axis of the fiber or the fiber bundles.
In an alternative embodiment, the circular skeleton is made of PPS or PE, and because the circular skeleton made of different materials has different mechanical properties, in a specific embodiment, a person skilled in the art can make appropriate adjustments for the purpose of adjusting the mechanical properties to the specific internal structure of the circular skeleton according to the actual requirements of the mechanical properties, and the specific circular skeleton form includes, but is not limited to, a circular disc skeleton or a circular ring skeleton with a reinforcing structure, including, but not limited to, a reinforcing rib, a reinforcing polygon structure, and the like.
In an alternative embodiment, the activated carbon is coconut activated carbon.
From the raw material source of the activated carbon, the raw material used for preparing the activated carbon can be almost all carbon-rich organic materials, such as coal, wood, fruit shells, coconut shells, walnut shells, apricot shells, jujube shells and the like. These carbonaceous materials can be converted to activated carbon by pyrolysis at elevated temperatures and pressures in an activation furnace. Wherein, the coconut shell active carbon is prepared by taking high-quality coconut shell as a raw material and carrying out finish machining through a series of production processes. The coconut shell activated carbon is black and granular in appearance, has developed pores, is economical and durable, and particularly has better adsorption performance, high strength, easy regeneration and other performances than other types of activated carbon, and can meet the requirements of nitrosation bacteria adsorption materials in the film forming process.
Preferably, the particle size of the activated carbon is 100-400 mesh.
The adsorption pore diameter of the activated carbon surface is 38-150 mu m under the mesh number, so that nitrosate bacteria can be fully adsorbed, and the activated carbon particles are prevented from falling off from the filler due to the fact that the activated carbon particles are too large.
Based on a first aspect, the present invention provides a use of the filler according to any of the preceding embodiments in a nitrifying bacteria film formation.
In a third aspect, the present invention provides a method for forming a film by using nitrobacteria, the method comprising immersing the filler according to any one of the foregoing embodiments in a nitrobacteria agent to adsorb nitrobacteria, filling the filler adsorbed with nitrobacteria into a film forming device at a filling rate of 50% to 80% by volume, and performing nitrobacteria enrichment film forming on the film forming device.
In an alternative embodiment, the nitrosate is a single cell or a nitrosate, wherein the single cell is in the form of a rod, and the single cell is free or embedded in a mucus, and is suitable for adsorbing activated carbon and aldehyde fiber. The growth temperature is 5-30 ℃, the growth pH value is 5.8-8.5, and the sewage can survive in most sewage loopsIn the environment with CO 2 As a carbon source, the method has the advantages that the autotrophic growth is carried out, cells produce rich cytochromes, cell suspension is light red, and the adsorption effect and the activity of the strain can be qualitatively judged through the appearance.
In an alternative embodiment, the enrichment method comprises the steps of carrying out two cycles of periodic treatment on the membrane hanging device every day, wherein each cycle of periodic treatment sequentially comprises the steps of water inlet, microbial inoculum adding, aeration, precipitation and water draining.
The water inlet procedure refers to adding test water into a reactor to provide nutrients for the growth of microorganisms.
The adding of the microbial inoculum means adding the nitrosating bacteria into the reactor.
The aeration process is to aerate the reaction system to provide oxygen for nitrosation reaction.
The sedimentation step is to stop aeration and act to sediment the cells.
The drainage procedure refers to the drainage of the reacted wastewater.
Preferably, the water inlet formula of the water inlet process comprises 0.2 to 1.5g/L of ammonium sulfate, 0.5 to 3.69g/L of sodium bicarbonate, 0.02 to 0.16g/L of sodium chloride, 0.01 to 0.07g/L of potassium chloride, 0.01 to 0.07g/L of anhydrous calcium chloride and Na 2 HPO 4 ·12H 2 O0.05-0.37 g/L and MgSO 4 ·7H 2 O 0.04～0.26g/L。
Further preferably, the water inlet formula of the water inlet process comprises 1.062g/L of ammonium sulfate, 2.637g/L of sodium bicarbonate, 0.115g/L of sodium chloride, 0.053g/L of potassium chloride, 0.053g/L of anhydrous calcium chloride and Na 2 HPO 4 ·12H 2 O0.261 g/L and MgSO 4 ·7H 2 O 0.189g/L。
Preferably, the pH value in the aeration process is 6.5-8.6, and the dissolved oxygen amount is not less than 2mg/L.
Wherein sodium bicarbonate is used for adjusting pH and providing a carbon source, sodium chloride, potassium chloride and anhydrous calcium chloride are used for providing sodium ions, potassium ions and calcium ions required by microorganism growth, disodium hydrogen phosphate is used for providing phosphate required by microorganism growth and adjusting pH, and magnesium sulfate is used for providing magnesium ions required by microorganism growth.
In an alternative embodiment, after enrichment is completed, the method further comprises a domestication procedure, wherein the domestication procedure comprises the step of introducing ammonia nitrogen-containing water at a flow rate of 0.5-1.2L/h at a temperature of 25-30 ℃, and the ammonia nitrogen concentration in the ammonia nitrogen-containing water is 250mg/L.
Preferably, the flow rate of the water containing ammonia nitrogen is gradually increased from low to high, the step length is 0.1L/h each time, and after the flow rate is increased each time, the flow rate is increased after the ammonia nitrogen concentration of the effluent is not higher than 5 mg/L.
In a fourth aspect, the present invention provides a film-forming apparatus for covering a nitrosate film obtained by the film-forming method according to any one of the above embodiments.
In a fifth aspect, the present invention provides an application of the film hanging device for covering a nitrosate film in a biological denitrification process according to the foregoing embodiment.
Biological denitrification refers to the process of converting organic nitrogen and ammonia nitrogen into nitrogen through ammoniation, nitration and denitrification under the combined action of microorganisms. The nitrosating bacteria are applied to various denitrification technologies such as anaerobic ammoxidation, short-range digestion and the like.
Preferably, the biological denitrification process is applied to a water purification process.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
The inventors obtained one strain of European nitromonas and nitrococcus each in a secondary sedimentation tank of a salty cationic sewage treatment plant in Tianjin city by sampling, separating and screening nitrosation strains for 3 months in 2021, and respectively applied the following different examples.
Example 1
The embodiment provides a preparation method for adsorbing nitrosation bacteria filler, which comprises the following steps:
(1) Fixation of the hydroformylation fiber bundles: the aldehyde fiber is fixed on a circular skeleton made of PPS material and having a diameter of 150mm by adopting a hot pressing method, the circular skeleton is a double-layer circular ring with a polygonal reinforcing structure arranged inside, and the specific structure is shown in figure 1.
(2) Preparation of composite filler: and (3) connecting the fixed formylated fiber bundles obtained in the step (1) in series by nylon ropes, wherein the interval is 30mm.
(3) Activated carbon adsorption: and (3) fully contacting 250-mesh coconut shell activated carbon with the composite filler obtained in the step (2), and shaking off activated carbon powder which is not adsorbed on the filler.
According to the mass, the activated carbon is 1 part, the circular framework is 50 parts, and the hydroformylation fiber is 50 parts.
Examples 2 and 3
Examples 2 and 3 differ from example 1 only in that the mesh numbers of the coconut shell activated carbon were 100 mesh and 400 mesh, respectively.
Examples 4 and 5
Examples 4 and 5 differ from example 1 only in the amounts of activated carbon, round skeleton and hydroformylation fiber, and the amounts of the three components in examples 4 and 5 are shown in Table 2.
Table 2 ratio of the amounts of the three components in examples 4 and 5
| Activated carbon | A | B | |
| Example 4 | 3 parts of | 55 parts of | 55 parts of |
| Example 5 | 5 parts of | 60 parts of | 60 parts of |
Example 6
The embodiment provides a method for forming a film of nitrobacteria by using the filler provided in the embodiment 1, which comprises the following steps:
the filler provided in example 1 is immersed in the European nitromonas agent with the mass concentration of 5000mg/L, and after standing for 24 hours, the filler adsorbed with European nitromonas is placed in a film forming device with the diameter of 10cm and the height of 60cm, and is cultivated in a sequencing batch mode with the volume filling rate of 70%, and the European nitromonas agent is added in the middle. The incubation time was 14 days. In the reactor, the operation was performed periodically per day according to the water inlet, aeration, precipitation, drainage and idle procedures, for 2 cycles per day, each cycle lasting for 12 hours. The aeration stage uses 20% sodium carbonate solution to adjust the pH value, the pH value is controlled between 6.5 and 8.6, and the dissolved oxygen is not lower than 2mg/L. The water inlet formula is as follows: 1.062g/L ammonium sulfate, 2.637g/L sodium bicarbonate, 0.115g/L sodium chloride, 0.053g/L potassium chloride, 0.053g/L anhydrous calcium chloride, na 2 HPO 4 ·12H 2 O 0.261g/L，MgSO 4 ·7H 2 O 0.189g/L。
Examples 7 and 8
Examples 7 and 8 differ from example 6 only in that the volume filling rates are 50% and 80%, respectively.
Example 9
In this embodiment, the film forming apparatus for covering the nitrosation film obtained in example 6 is subjected to domestication, and the domestication method includes the following steps:
placing a film forming device covered with a nitrosation bacterial film in a 4.7L reactor, introducing a water body with ammonia nitrogen concentration of 250mg/L at 25-30 ℃, reducing the ammonia nitrogen concentration of the effluent to 5.0mg/L at the initial flow rate of the water body of 0.5L/h, adjusting the flow rate of 0.6L/h, reducing the ammonia nitrogen concentration of the effluent to 5.0mg/L, adjusting the flow rate of 0.7L/h, and so on, wherein the step length of 0.1L/h, and finishing domestication after 60 days under the condition that the flow rate of 1.2L/h, and reducing the ammonia nitrogen concentration of the effluent to 47.6 mg/L.
Example 10
The only difference between this example and example 9 is that the nitrosate used was nitrosate.
Comparative examples 1 and 2
Examples 1 and 2 differ from example 1 only in that the mesh number of the coconut shell activated carbon was 80 mesh and 450 mesh, respectively.
Comparative examples 3 and 4
Comparative examples 3 and 4 differ from example 1 only in the amounts of activated carbon, A and B, and the amounts of the three components in comparative examples 3 and 4 are shown in Table 3.
Table 3 ratio of the amounts of the three components in comparative examples 3 and 4
Comparative examples 5 and 6
Comparative examples 5 and 6 differ from example 6 only in that the volume filling rates are 40% and 90%, respectively.
Comparative examples 7 and 8
Comparative examples 7 and 8 differ from example 6 only in that the composite packing provided in example 1 was replaced with MBBR packing and sponge packing, respectively.
Experimental example 1
The film forming apparatus for covering the nitrosation film provided in comparative examples 7 and 8 was subjected to domestication by the domestication method of example 9, and the results are shown in the following table in comparison with the domestication results of example 9.
TABLE 4 comparison of domestication results of different fillers after film formation on Nitromonas europea
Note that: and (3) stopping domestication because the ammonia nitrogen in the effluent is not reduced to 5mg/L within 30 days when the water inflow rate of the MBBR filler and the sponge filler is 0.5L/d.
As can be seen from Table 4, after the three fillers are treated by the activated carbon, the European nitromonas film is formed, and the film forming fillers have nitrosation capability, but the composite filler and the activated carbon provided in the example 1 are combined to form the film with higher biological activity. The method for jointly using the activated carbon and the composite filler has the advantages of easiness in preparation, capability of purifying and maintaining high-efficiency strains, resistance to adverse environmental influences, good stability and the like, has a good application prospect in low-carbon high-nitrogen wastewater denitrification treatment, and can expand the application of a microorganism immobilization technology in the field of biological denitrification.
And, the polypropylene MBBR filler and the hydrophilic polyurethane filter open-cell reticulated sponge filler can be seen to have microbial colony adhesion during film formation (SBR mode operation). During acclimation (UASB mode operation), the attached microbial biomass gradually decreases. The composite filler provided by the invention stably runs for half a year, and has no microbial shedding and activity reduction.
Experimental example 2
The strain used in comparative examples 7 and 8 was replaced with nitrococcus, and the film forming apparatus for covering nitrosated film provided in comparative examples 7 and 8 was subjected to domestication by the domestication method of example 9, and the results are shown in the following table in comparison with the domestication results of example 10.
TABLE 5 comparison of domestication results of different fillers after film formation on nitrococcus
As can be seen from table 5, after the nitromonas europe is replaced by nitrococcus, the biological activity of the composite filler provided in example 1 and activated carbon combined film hanging is still higher than that of the other two fillers, and it is again proved that the acclimation result of the composite filler provided in example 1 after film hanging is indeed significantly better than that of the other two fillers, and in addition, according to the results in table 4 and table 5, it can be seen that the acclimation result of the composite filler provided in example 1 after film hanging is better than that of nitrococcus when film hanging is performed by using the composite filler provided in example 1.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The method for forming the film by using the nitrobacteria is characterized by comprising the steps of immersing a filler in a nitrobacteria agent to adsorb the nitrobacteria, filling the filler adsorbed with the nitrobacteria into a film forming device at a filling rate of 50-80% by volume, and enriching the nitrobacteria into a film by using the film forming device;
the enrichment method comprises the steps that a film forming device carries out two rounds of periodic treatment every day, and each round of periodic treatment sequentially carries out water inlet, microbial inoculum adding, aeration, precipitation and drainage;
the water inlet formula of the water inlet process comprises 0.2 to 1.5g/L of ammonium sulfate, 0.5 to 3.69g/L of sodium bicarbonate, 0.02 to 0.16g/L of sodium chloride, 0.01 to 0.07g/L of potassium chloride, 0.01 to 0.07g/L of anhydrous calcium chloride and Na 2 HPO 4 ·12H 2 O0.05-0.37 g/L and MgSO 4 ·7H 2 O 0.04～0.26g/L；
The pH value in the aeration process is 6.5-8.6, and the dissolved oxygen is not less than 2mg/L;
after enrichment is completed, the method further comprises a domestication procedure, wherein the domestication procedure comprises the steps of introducing ammonia nitrogen-containing water at the flow rate of 0.5-1.2L/h under the condition of 25-30 ℃, and the ammonia nitrogen concentration in the ammonia nitrogen-containing water is 250mg/L;
the flow rate of the water containing ammonia nitrogen is gradually increased from low to high, the step length is 0.1L/h each time, after the flow rate is increased each time, the concentration of the ammonia nitrogen in the effluent water is not higher than 5mg/L, and then the flow rate is increased;
the filler comprises, by mass, 1-5 parts of activated carbon, 50-60 parts of a circular framework and 50-60 parts of aldehyde fibers; the diameter of the round frameworks is 100-200 mm, the distance between adjacent round frameworks is 20-40 mm, the hydroformylation fibers are fixed on the round frameworks, and the activated carbon is uniformly adsorbed on the hydroformylation fibers and the surfaces of the round frameworks;
the activated carbon is coconut shell activated carbon.
2. The film forming method according to claim 1, wherein the water inlet formulation of the water inlet process comprises 1.062g/L ammonium sulfate, 2.6371g/L sodium bicarbonate, 0.1153g/L sodium chloride, 0.0534g/L potassium chloride, 0.0536g/L anhydrous calcium chloride, na 2 HPO 4 ·12H 2 O0.2611 g/L and MgSO 4 ·7H 2 O 0.189g/L。
3. The film forming method according to claim 1, wherein the circular skeleton is made of polyphenylene sulfide or polyethylene.
4. The film forming method according to claim 1, wherein the activated carbon has a particle size of 100 to 400 mesh.
5. The film forming method according to claim 1, wherein the nitrosate is a unit cell or a nitrococcus.
6. A film-forming device for covering a nitrifying bacteria film obtained by the film-forming method according to any one of claims 1 to 5.
7. The use of the nitrifying bacteria film-covering film-forming device according to claim 6 in a biological denitrification process.
8. The use according to claim 7, wherein the biological denitrification process is applied to a water purification process.
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