CN117023884A - Zero-carbon source HJDL sewage treatment method - Google Patents
Zero-carbon source HJDL sewage treatment method Download PDFInfo
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- CN117023884A CN117023884A CN202311082086.2A CN202311082086A CN117023884A CN 117023884 A CN117023884 A CN 117023884A CN 202311082086 A CN202311082086 A CN 202311082086A CN 117023884 A CN117023884 A CN 117023884A
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- hjdl
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- 239000010865 sewage Substances 0.000 title claims abstract description 79
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 230000002195 synergetic effect Effects 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 241000894006 Bacteria Species 0.000 claims abstract description 37
- 244000005700 microbiome Species 0.000 claims abstract description 37
- 239000010802 sludge Substances 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000002068 microbial inoculum Substances 0.000 claims abstract description 15
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims abstract description 9
- 230000012447 hatching Effects 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 80
- 238000002360 preparation method Methods 0.000 claims description 73
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 44
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 32
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 32
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 32
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 238000004062 sedimentation Methods 0.000 claims description 18
- 239000004408 titanium dioxide Substances 0.000 claims description 18
- 238000007873 sieving Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000000967 suction filtration Methods 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000005909 Kieselgur Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000011534 incubation Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- 239000003995 emulsifying agent Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- -1 aluminum ions Chemical class 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 229910001424 calcium ion Inorganic materials 0.000 claims description 2
- 229910001431 copper ion Inorganic materials 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- 229960002089 ferrous chloride Drugs 0.000 claims description 2
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- 235000005074 zinc chloride Nutrition 0.000 claims description 2
- 230000001580 bacterial effect Effects 0.000 claims 2
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 48
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 47
- 239000011574 phosphorus Substances 0.000 abstract description 47
- 229910019142 PO4 Inorganic materials 0.000 abstract description 14
- 239000010452 phosphate Substances 0.000 abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 50
- 230000000694 effects Effects 0.000 description 26
- 229910052757 nitrogen Inorganic materials 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 17
- 238000004065 wastewater treatment Methods 0.000 description 15
- 230000000813 microbial effect Effects 0.000 description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 4
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 3
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical group ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000589291 Acinetobacter Species 0.000 description 2
- 241000607534 Aeromonas Species 0.000 description 2
- 244000063299 Bacillus subtilis Species 0.000 description 2
- 235000014469 Bacillus subtilis Nutrition 0.000 description 2
- 241000186216 Corynebacterium Species 0.000 description 2
- 102000002151 Microfilament Proteins Human genes 0.000 description 2
- 108010040897 Microfilament Proteins Proteins 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003632 microfilament Anatomy 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000000243 photosynthetic effect Effects 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 229920002627 poly(phosphazenes) Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000012546 transfer Methods 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The application discloses a zero-carbon source HJDL sewage treatment method, which adopts an HJDL reaction tank; the HJDL reaction tank comprises a microorganism hatching system; the HJDL reaction tank is provided with a biological synergistic carrier and a composite microbial inoculum; the biological synergistic carrier is a carboxymethyl cellulose-diatomite carrier; the surface of the biological synergistic carrier is coordinated with metal ions. The metal ions can capture phosphate generated by the phosphorus accumulating bacteria and carry out chemical reaction, so that a sludge carrier is not needed in the phosphorus removing process, the demand of organic carbon sources in the phosphorus removing process is reduced, the utilization rate of the carbon sources in sewage is increased, and therefore, no additional carbon sources are needed to be added in the environment of low-carbon source sewage.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to a zero-carbon source HJDL sewage treatment method.
Background
With the continuous improvement of urban living standard, the concentration of organic matters in urban sewage in China is lower and lower, and the phenomenon of low carbon source is more and more serious. Under the condition of lacking a carbon source, in order to realize standard emission of phosphorus and nitrogen indexes, most low-carbon-source town sewage treatment plants need to throw a large amount of additional carbon sources in the sewage treatment process so as to ensure normal operation of biological denitrification and biological dephosphorization reactions.
However, the cost of adding the additional carbon source is high, and a large amount of carbon emission is caused while the production cost is increased, so that the effect of dephosphorization and denitrification is improved and the standard emission is realized while the additional carbon source is not increased, and the problem of urgent need of the current low-carbon source sewage treatment is solved.
Disclosure of Invention
The application provides a zero-carbon source HJDL sewage treatment method, which aims to solve the problems that a large amount of additional carbon sources are needed to be added to the low-carbon source sewage to realize the up-to-standard discharge of dephosphorization and denitrification of the sewage, and a large amount of added cost and carbon discharge are caused.
In the first aspect, a zero-carbon source HJDL sewage treatment method adopts an HJDL reaction tank; the HJDL reaction tank comprises a microorganism hatching system; the HJDL reaction tank is provided with a biological synergistic carrier and a composite microbial inoculum; the biological synergistic carrier is a carboxymethyl cellulose-diatomite carrier; metal ions are coordinated on the surface of the biological synergistic carrier; the metal ions comprise one or a combination of several of aluminum ions, ferrous ions, calcium ions, zinc ions and copper ions.
The organic carbon source in the sewage is decomposed into an energy donor of microorganisms in the bioconversion process, and can be used as a material basis for the growth and propagation of the microorganisms, a material carrier for biological dephosphorization and an electron donor in the biological denitrification process; for low-carbon source sewage, the biological denitrification process is difficult to be carried out smoothly, the proliferation of sludge is slow, and the discharge amount of residual sludge is insufficient, so that the effect of removing phosphorus is poor due to the lack of a phosphorus carrier.
The organic carbon source required by unit dephosphorization is far more than that required by unit denitrification, so that the standard discharge of denitrification and dephosphorization can be realized under the condition of not adding a large amount of carbon source by changing the mode of biological dephosphorization. By adopting the technical scheme, the surface of the biological synergistic carrier is coordinated with metal ions, and the microorganisms release phosphate after absorbing phosphorus, and then the phosphate is captured by the metal ions on the surface of the carrier and subjected to chemical reaction, so that the phosphate is not required to be deposited on a sludge carrier, the demand of organic carbon sources in the phosphorus removal process is reduced, the utilization rate of the carbon sources in sewage is increased, and additional carbon sources are not required to be added.
The biological synergistic carrier is a carboxymethyl cellulose-diatomite carrier, the diatomite has a porous structure and a larger specific surface area, the chemical property is stable, microorganisms can be well adsorbed and grown in the gaps of the diatomite, and a good living environment is provided for a plurality of anaerobic bacteria such as phosphorus accumulating bacteria; the carboxymethyl cellulose has excellent biocompatibility and environmental friendliness, and the surface of the carboxymethyl cellulose is provided with a large number of active groups, so that a donor can be provided for the coordination reaction of metal cations; on the one hand, due to the biocompatibility of the carboxymethyl cellulose, the carboxymethyl cellulose can attract a large amount of microorganisms to be attached to the biological synergistic carrier; on the other hand, in the sewage treatment process, microorganisms are attached to diatomite to gradually absorb organic carbon sources in the sewage to meet the energy required by self growth, but after the diatomite absorbs the organic carbon sources, anaerobic expansion can be carried out on the diatomite to gradually form a diatomite suspension layer, so that the diatomite loses the original normal treatment effect, the HJDL reaction tank cannot be used normally, and the carboxymethyl cellulose covers the surface of the diatomite to enhance the stability of the diatomite and inhibit the occurrence of anaerobic expansion phenomenon; the two are matched with each other, so that the load of microorganisms can be increased, the composite microbial inoculum is loaded on the biological synergistic carrier, an internal anaerobic, middle facultative and external aerobic structure can be formed in a short time, biological nitrification and denitrification can be simultaneously carried out, and the utilization rate of organic carbon sources in sewage is increased.
Preferably, the composite microbial inoculum comprises one or a combination of a plurality of composite denitrifying bacteria, composite dephosphorizing bacteria, composite COD bacteria and anaerobic microbial inoculum.
Preferably, the compound denitrifying bacteria comprise one or a combination of a plurality of bacillus subtilis, nitrifying bacteria, denitrifying bacteria, photosynthetic bacteria and lactic acid bacteria.
Preferably, the compound polyphosphazene comprises one or a combination of a plurality of acinetobacter, aeromonas, corynebacterium and microfilament bacteria.
Preferably, the composite COD bacteria comprise one or a combination of a plurality of sweet composite bacteria and COD degrading bacteria.
Preferably, the anaerobic agent is methanogen.
By adopting the technical scheme, the denitrification and dephosphorization capability is obviously improved by the mutual coordination of the composite microbial agents, and the stress resistance is also obviously improved by adopting the combination of a plurality of strains due to the single microbial agent product, so that the method can be suitable for various different types of sewage; the anaerobic bacteria agent contained in the microbial agent can provide trace elements for the growth and propagation of microorganisms, accelerate the metabolism of the microorganisms and improve the denitrification and dephosphorization capabilities of the microorganisms.
Preferably, the raw materials of the biological synergistic carrier comprise (20-40) by mass ratio: (3-8): 100, metal salts and diatomaceous earth.
Preferably, the preparation method of the biological synergistic carrier comprises the following steps:
diatomite modification: adding diatomite into a hydrochloric acid solution, soaking for 4-6 hours at a constant temperature of 60-80 ℃, filtering, washing to be neutral, drying, grinding, and sieving with a 200-mesh sieve to obtain modified diatomite;
preparation of carboxymethyl cellulose-diatomaceous earth carrier: dispersing the modified diatomite in deionized water; dissolving carboxymethyl cellulose and sodium hydroxide in deionized water, adding the deionized water into modified diatomite solution, stirring and dispersing, adding an emulsifying agent and a crosslinking agent, and stirring and reacting for 1-2 h at 60-80 ℃; the temperature is reduced to 35-45 ℃, metal salt is added, stirring reaction is continued for 6-8 h, and then the carboxymethyl cellulose-diatomite carrier is obtained through suction filtration, washing, drying, grinding and sieving.
The metal salt comprises one or a combination of more of aluminum chloride, aluminum sulfate, ferrous chloride, ferric sulfate, calcium chloride, copper sulfate, copper nitrate and zinc chloride.
Preferably, in the diatomite modification, the mass volume ratio of the diatomite to the hydrochloric acid solution is (5-10) g:100ml; wherein the molar concentration of the hydrochloric acid solution is 1mol/L.
Preferably, the emulsifier comprises one or a combination of several of octyl phenol polyoxyethylene ether, dodecyl polyoxyethylene ether and nonyl polyoxyethylene ether; the cross-linking agent is epichlorohydrin.
Preferably, the addition amount of sodium hydroxide is 0.5-1% of the addition amount of carboxymethyl cellulose.
Preferably, the mass ratio of the emulsifier to the carboxymethyl cellulose is (0.8-1.1): 1, a step of; the adding amount of the cross-linking agent is 3-8% of the adding amount of the carboxymethyl cellulose.
By adopting the technical scheme, the surface of the particles becomes coarser after the diatomite is treated by hydrochloric acid, so that a plurality of grooves and holes are formed, the surface area and specific volume of the particles are increased, more microorganisms can be loaded, and the subsequent coating of carboxymethyl cellulose is facilitated; carboxymethyl cellulose is coated on the surface of diatomite under the action of an emulsifying agent and a cross-linking agent to form a gel coating layer, metal salt is dissolved in the solution, and metal cations are coordinated with active groups on the carboxymethyl cellulose and fixed on a carrier, so that the phosphate is conveniently captured and fixed.
Preferably, the surface of the modified diatomite is also loaded with titanium dioxide.
Preferably, the modified diatomite loaded titanium dioxide is prepared by the following method: adding butyl titanate into absolute ethyl alcohol, stirring uniformly, adding acetic acid, and continuing stirring until a transparent pale yellow liquid is formed; adding the modified diatomite into transparent pale yellow liquid, stirring and mixing, adding nitric acid, raising the temperature to 40-50 ℃, stirring and reacting for 4-6 hours, cooling and standing for 10-12 hours, then placing into a muffle furnace for roasting for 3-4 hours at 500-700 ℃, and grinding and sieving to obtain the modified diatomite-loaded titanium dioxide.
Preferably, the mass ratio of the butyl titanate to the modified diatomite is (0.4-0.6): 1.
by adopting the technical scheme, the titanium dioxide has a photocatalysis effect, and can catalyze and decompose part of carboxymethyl cellulose which is solidified with phosphate through being loaded on diatomite, the decomposed carboxymethyl cellulose and sludge are removed together through deposition, and part of decomposed carboxymethyl cellulose can serve as a part of carbon source to provide part of energy for microorganisms, so that energy for growth and propagation is provided for the microorganisms in a sewage environment with low carbon source, and the efficiency of denitrification and dephosphorization of microorganisms is improved.
Preferably, the particle size of the biological synergistic carrier is 200-400 meshes.
The particle size of the biological synergistic carrier is small, the particle size of the formed sludge particles is small, the stability of the sludge particles is improved, and the mass transfer effect of the substance is excellent.
Preferably, the mass ratio of the released biological synergistic carrier to the composite microbial inoculum is 1: (0.2-0.4).
In a second aspect, the application also provides a zero-carbon source HJDL sewage treatment method, which comprises the following steps:
s1: filtering the sewage by a grid to obtain large-sized impurities and medium-sized impurities, and enabling the filtered sewage to enter the front end of the HJDL tank and flow into the HJDL reaction tank together with the return sludge mixed solution;
s2: the HJDL reaction tank comprises a microorganism incubation system, a stirring device and a reflux device, wherein sewage and reflux sludge mixed liquor enter the microorganism incubation system together with high-concentration microorganisms, and are incubated into HJDL granular sludge under the action of the microorganism incubation system and are sprayed out from the bottom in a pressurizing way; the stirring device is used for keeping mud, water and microorganisms in the HJDL reaction tank in a continuous motion state; the reflux device pumps the existing biological synergistic carrier and composite microbial inoculum in the HJDL reaction tank to the top end of the reactor, and the granulating process of the granulated sludge is continuously completed;
s3: and (3) allowing the water discharged from the HJDL reaction tank to enter a secondary sedimentation tank for standing and sedimentation, discharging bottom sludge in the secondary sedimentation tank, re-entering a mixed liquid of middle sludge and return sludge in the secondary sedimentation tank into the HJDL reaction tank for treatment, discharging sewage with qualified water quality index after sedimentation treatment in the secondary sedimentation tank, and finishing sewage treatment.
By adopting the technical scheme, sewage is treated by the HJDL reaction tank, and the biological synergistic carrier contained in the sewage can form sludge particles, so that the sewage has good removal effect on nitrogen and phosphorus in the sewage; and due to the action of the carboxymethyl cellulose-diatomite carrier, good denitrification and dephosphorization effects can be realized in the treatment process of the low-carbon source sewage.
In summary, the application has the following beneficial effects:
1. the surface of the biological synergistic carrier is coordinated with metal ions, and the microorganisms absorb phosphorus and release phosphate, and then the phosphate is captured by the metal ions on the surface of the carrier and subjected to chemical reaction, so that the phosphate is not required to be deposited on a sludge carrier, the demand of organic carbon sources in the phosphorus removal process is reduced, the utilization rate of the carbon sources in sewage is increased, and the addition of additional carbon sources is not required.
2. The diatomite has a porous structure and a large specific surface area, has stable chemical properties, can be well adsorbed and grown in the gaps of the diatomite, and provides a good living environment for a plurality of anaerobic bacteria such as phosphorus accumulating bacteria; carboxymethyl cellulose can provide a donor for the coordination reaction of metal cations and stabilize diatomite, so that the anaerobic expansion phenomenon is inhibited.
3. The modified diatomite surface can also be loaded with titanium dioxide, the titanium dioxide has a photocatalysis effect, and the titanium dioxide can catalyze and decompose part of carboxymethyl cellulose of the solidified phosphate through being loaded on the diatomite, the decomposed carboxymethyl cellulose and sludge are removed together through deposition, and part of decomposed carboxymethyl cellulose can serve as a part of carbon source to provide part of energy for microorganisms, so that energy for growth and propagation is provided for the microorganisms in a sewage environment with low carbon source, and the efficiency of denitrification and dephosphorization of the microorganisms is improved.
Detailed Description
Preparation example of modified diatomite-supported titanium dioxide
Preparation example 1-1, a modified diatomite loaded titanium dioxide, is prepared according to the following method:
8g of diatomite (the silicon dioxide content is 80% -84%) is added into 100ml of 1mol/L hydrochloric acid solution, soaked for 5 hours at the constant temperature of 60 ℃, and then the modified diatomite is obtained through suction filtration, washing, drying, grinding and sieving;
adding 50g of butyl titanate into 200ml of absolute ethyl alcohol solution, stirring uniformly, adding 10g of acetic acid, stirring continuously until a transparent pale yellow liquid is formed, adding 100g of modified diatomite into the transparent pale yellow liquid, stirring and mixing, adding 4g of nitric acid, raising the temperature to 40 ℃, stirring and reacting for 6 hours, cooling and standing for 12 hours, putting into a muffle furnace, roasting for 3 hours at 600 ℃, and grinding and sieving to obtain the modified diatomite-loaded titanium dioxide.
Preparation example of biological synergistic Carrier
Preparation example 2-1, a biological synergistic carrier, is prepared according to the following method:
100g of diatomite (the silicon dioxide content is 80% -84%) is added into 1000ml of 1mol/L hydrochloric acid solution, soaked for 5 hours at the constant temperature of 60 ℃, and then the modified diatomite is obtained through suction filtration, washing, drying, grinding and sieving;
dispersing the obtained modified diatomite in 250ml of deionized water; dissolving 30g of carboxymethyl cellulose (with the viscosity of 800-1200 mpa.s) and 0.24g of sodium hydroxide in 100ml of deionized water, adding the solution into the modified diatomite solution, stirring and dispersing, adding 30g of octyl phenol polyoxyethylene ether and 1.8g of epichlorohydrin, and stirring and reacting for 2 hours at 70 ℃; and (3) reducing the temperature to 40 ℃, adding 6g of aluminum chloride, continuously stirring and reacting for 8 hours, and carrying out suction filtration, washing, drying, grinding and sieving to obtain the biological synergistic carrier. The average particle size of the biological synergistic carrier obtained by screening is 200 meshes.
Preparation 2-2, a bioengineering carrier, differs from preparation 2-1 only in that the modified diatomaceous earth of preparation 2-1 was replaced with the modified diatomaceous earth-supported titania obtained in preparation 1-1 in an equivalent amount.
Preparation example 2-3, a biological synergistic carrier, differs from preparation example 2-1 only in that the modified diatomaceous earth is the modified diatomaceous earth-loaded titanium dioxide prepared in preparation example 1-1 and the modified diatomaceous earth in preparation example 2-1 in a mass ratio of 5:5.
Preparation example 2-4, a biological synergistic carrier, differs from preparation example 2-1 only in that the modified diatomaceous earth is the modified diatomaceous earth-loaded titanium dioxide prepared in preparation example 1-1 and the modified diatomaceous earth in preparation example 2-1 in a mass ratio of 2:8.
Preparation examples 2-5 to 2-10, a bioengineering carrier, differ from preparation example 2-1 only in the proportions of the raw materials used, the raw material formulations used being as shown in Table 1:
table 1 formulations of preparation examples 2-1, preparation examples 2-5 and preparation examples 2-10
Wherein the average particle diameter of the biological synergistic carrier obtained by screening in preparation examples 2-7 and preparation examples 2-8 is 400 meshes.
Preparation examples 2-11, a bioengineering carrier, differ from preparation example 2-1 only in that carboxymethylcellulose was added in an amount of 15g.
Preparation examples 2-12, a bioengineering carrier, differ from preparation example 2-1 only in that carboxymethylcellulose was added in an amount of 45g.
Preparation examples 2-13, a bioengineering carrier, differ from preparation example 2-1 only in that aluminum chloride was added in an amount of 2g.
Preparation examples 2-14, a bioengineering carrier, differ from preparation example 2-1 only in that aluminum chloride was added in an amount of 10g.
Preparation examples 2-15, a biological synergistic carrier, is prepared according to the following method:
100g of diatomite (the silicon dioxide content is 80% -84%) is added into 1000ml of 1mol/L hydrochloric acid solution, soaked for 5 hours at the constant temperature of 60 ℃, and then the modified diatomite is obtained through suction filtration, washing, drying, grinding and sieving;
dispersing the obtained modified diatomite in 250ml of deionized water; then adding 6g of aluminum chloride, raising the temperature to 50 ℃, stirring and reacting for 8 hours, and obtaining the biological synergistic carrier through suction filtration, washing, drying, grinding and sieving. The average particle size of the biological synergistic carrier obtained by screening is 200 meshes.
2-16 of biological synergistic carrier is prepared, and the biological synergistic carrier is prepared according to the following method:
100g of diatomite (the silicon dioxide content is 80% -84%) is added into 1000ml of 1mol/L hydrochloric acid solution, soaked for 5 hours at the constant temperature of 60 ℃, and then the modified diatomite is obtained through suction filtration, washing, drying, grinding and sieving;
dispersing the obtained modified diatomite in 250ml of deionized water; 30g of carboxymethyl cellulose (with the viscosity of 800-1200 mpa.s) and 0.24g of sodium hydroxide are taken to be dissolved in 100ml of deionized water, and are added into the modified diatomite solution, stirred and dispersed, then 30g of octyl phenol polyoxyethylene ether and 1.8g of epichlorohydrin are added, stirred and reacted for 2 hours at 70 ℃, and then the biological synergistic carrier is obtained through suction filtration, washing, drying, grinding and sieving. The average particle size of the biological synergistic carrier obtained by screening is 200 meshes.
Preparation examples 2-17, a biological synergistic carrier, were prepared as follows:
100g of diatomite (with the silicon dioxide content of 80% -84%) is added into 1000ml of 1mol/L hydrochloric acid solution, soaked for 5 hours at the constant temperature of 60 ℃, and then the biological synergistic carrier is obtained through suction filtration, washing, drying, grinding and sieving, and the average grain diameter of the biological synergistic carrier obtained through sieving is 200 meshes.
Examples
Example 1, a zero carbon source HJDL sewage treatment method, the steps of which are as follows:
s1: filtering the sewage by a grid to obtain large-sized impurities and medium-sized impurities, and enabling the filtered sewage to enter the front end of the HJDL tank and flow into the HJDL reaction tank together with the return sludge mixed solution;
s2: the HJDL reaction tank comprises a microorganism incubation system, a stirring device and a reflux device, wherein sewage and reflux sludge mixed liquor enter the microorganism incubation system together with high-concentration microorganisms, and are incubated into HJDL granular sludge under the action of the microorganism incubation system and are sprayed out from the bottom in a pressurizing way; the stirring device is used for keeping mud, water and microorganisms in the HJDL reaction tank in a continuous motion state; the reflux device pumps the existing biological synergistic carrier and composite microbial inoculum in the HJDL reaction tank to the top end of the reactor, and the granulating process of the granulated sludge is continuously completed;
s3: and (3) allowing the water discharged from the HJDL reaction tank to enter a secondary sedimentation tank for standing and sedimentation, discharging bottom sludge in the secondary sedimentation tank, re-entering a mixed liquid of middle sludge and return sludge in the secondary sedimentation tank into the HJDL reaction tank for treatment, discharging sewage with qualified water quality index after sedimentation treatment in the secondary sedimentation tank, and finishing sewage treatment.
Wherein the biological synergistic carrier and the composite microbial inoculum prepared in preparation example 2-1 with the mass ratio of 1:0.25 are put into an HJDL reaction tank. The mass ratio of the composite microbial inoculum is m (composite COD bacteria): m (composite denitrifying bacteria): m (composite phosphorus accumulating bacteria): m (anaerobic agent) =3:3:2:2. Wherein the composite COD bacteria comprise sweet composite bacteria and COD degrading bacteria; the composite denitrifying bacteria comprise bacillus subtilis, nitrifying bacteria, denitrifying bacteria, photosynthetic bacteria and lactic acid bacteria; the compound phosphorus accumulating bacteria comprise the combination of Acinetobacter, aeromonas, corynebacterium and microfilament bacteria; the anaerobic bacteria agent is methanogen.
Example 2, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-2 in an equivalent amount.
Example 3, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-3 in an equivalent amount.
Example 4, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-4 in an equivalent amount.
Example 5, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-5 in an equivalent amount; the mass ratio of the released biological synergistic carrier to the composite microbial inoculum is 1:0.2.
example 6, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-6 in an equivalent amount; the mass ratio of the released biological synergistic carrier to the composite microbial inoculum is 1:0.4.
example 7, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-7 in an equivalent amount.
Example 8, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-8 in an equivalent amount.
Example 9, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-9 in an equivalent amount.
Example 10, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-10 in the same amount.
Example 11, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-11 in an equivalent amount.
Example 12, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-12 in an equivalent amount.
Example 13, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-13 in an equivalent amount.
Example 14, a zero carbon source HJDL wastewater treatment method, differs from example 1 only in that the bioengineering vector prepared in preparation example 2-1 was replaced with the bioengineering vector prepared in preparation example 2-14 in the same amount.
Comparative example
Comparative example 1, a zero carbon source HJDL sewage treatment method, was different from example 1 only in that the bioengineering carrier prepared in preparation example 2-1 was replaced with the bioengineering carrier prepared in preparation example 2-15 in the same amount.
Comparative example 2, a zero carbon source HJDL wastewater treatment method, was different from example 1 only in that the bioengineering carrier prepared in preparation example 2-1 was replaced with the bioengineering carrier prepared in preparation example 2-16 in the same amount.
Example 3 a zero carbon source HJDL wastewater treatment process differs from example 1 only in that the bioengineering vector of preparation 2-1 was replaced with the bioengineering vector of preparation 2-17 in equal amount.
Performance test
1. Nitrogen removal rate in low carbon source sewage: and determining the total nitrogen content in the sewage according to HJ 636-2012 determination of total nitrogen in water quality alkaline potassium persulfate digestion ultraviolet spectrophotometry. Testing total nitrogen content in the sewage before sewage treatment and after sewage treatment in examples 1-14 and comparative examples 1-3, and calculating to obtain total nitrogen removal rate, wherein the sewage inflow is 200m 3 And/d, the treatment time is 7 days, and the calculation formula is as follows:
wherein N is 1 Refers to the total phosphorus content, N in the sewage before treatment 2 Refers to the total phosphorus content in the treated sewage.
2. Phosphorus removal rate in low carbon source sewage: the total phosphorus content in the sewage is determined according to GB/T11893-1989 Spectrophotometry for determination of total phosphorus in Water quality. Testing the total phosphorus content in the sewage before sewage treatment and after the sewage treatment of the examples 1-14 and the comparative examples 1-3, and calculating to obtain the total phosphorus removal rate, wherein the sewage inflow is 200m 3 And/d, the treatment time is 7 days, and the calculation formula is as follows:
wherein P is 1 Refers to the total phosphorus content, P, in the sewage before treatment 2 Refers to the total phosphorus content in the treated sewage.
The test results are shown in Table II:
denitrification and dephosphorization test result of surface second low carbon source sewage
From table two, in combination with example 1 and example 2, it can be seen that the total phosphorus removal rate and the total nitrogen removal rate of example 2 are increased compared with example 1, indicating that the nitrogen and phosphorus removal effect of example 2 is superior to example 1. The reason for this may be that in example 2, the bio-synergistic carrier is loaded with titanium dioxide, the titanium dioxide has a photocatalytic effect, and in the process of sewage treatment, metal ions on the bio-synergistic carrier are combined with phosphate released by phosphorus accumulating bacteria, and are decomposed from the bio-synergistic carrier under the catalytic effect of the titanium dioxide to be co-deposited with sludge, and the decomposed part of carboxymethyl cellulose can also be used as a nutrient source for microbial growth and propagation, so that microbial growth is promoted, and a good denitrification and dephosphorization effect is exhibited.
In combination with examples 1, 2, 3 and 4, it can be seen that the total nitrogen removal rate and total phosphorus removal rate of example 3 are the highest, and example 4 is similar to the total phosphorus removal rate and total nitrogen removal rate of example 1, indicating that the nitrogen and phosphorus removal rate of example 3 is the best. The reason for this may be that the mass ratio of the titania-loaded biosynergistic carrier to the titania-unloaded biosynergistic carrier in example 3 is 5:5, and example 3 can perform a partial catalytic decomposition reaction compared to the biosynergistic carrier without titania at all, whereas the catalytic decomposition rate of example 3 is relatively slow compared to the biosynergistic carrier with titania at all, which can make the reaction proceed for a long time, and the denitrification and dephosphorization effects are more prominent.
In combination with example 1, examples 5 to 10, it can be seen that the total nitrogen removal rate and the total phosphorus removal rate of examples 5 to 10 are not significantly changed from example 1, indicating that the nitrogen and phosphorus removal effects of examples 5 to 10 are similar to example 1. The reason for this is probably that the difference between examples 5 to 10 and example 1 is only that the raw material ratio of the adopted bio-synergistic carrier is changed within the required range in the preparation process, which means that the change of the raw material ratio of the bio-synergistic carrier within the required range has no obvious influence on the final denitrification and dephosphorization effect.
In combination with examples 1, 11 and 12, it can be seen that the total nitrogen removal rate and the total phosphorus removal rate of examples 11 and 12 are reduced compared to example 1, wherein the reduction in example 11 is more pronounced, indicating that the nitrogen and phosphorus removal effects of examples 11 and 12 are reduced compared to example 1. The origin may be that the bio-synergistic carrier used in example 11 has a reduced amount of carboxymethyl cellulose added during the preparation process, resulting in a reduced content of carboxymethyl cellulose coated on the surface of diatomaceous earth, reduced binding sites for complexation with metal ions, and reduced denitrification and dephosphorization effects; the bio-enhancing carrier used in example 12 was increased in the amount of carboxymethyl cellulose added during the preparation process, and a part of carboxymethyl cellulose was easily self-associated and entangled with each other, and the stability was lowered, resulting in a decrease in the final denitrification and dephosphorization effects.
In combination with examples 1, 13 and 14, it can be seen that the total phosphorus removal rate and total nitrogen removal rate of example 13 were reduced compared to example 1, wherein the reduction in total phosphorus removal rate was more pronounced, and that the less pronounced change in total phosphorus removal rate and total nitrogen removal rate of example 14 compared to example 1, demonstrated that the nitrogen and phosphorus removal effect of example 13 was reduced compared to example 1. The reason for this is probably that the content of metal ions on the bio-synergistic carrier employed in example 13 is reduced, the content of metal ions bound to phosphate is reduced, the phosphorus accumulating bacteria and the denitrifying bacteria compete for a small amount of carbon source in the sewage, and the overall denitrification and dephosphorization effects are reduced; the bio-enhancing carrier used in example 14 increased the amount of metal salt added during the preparation process, but the metal ion coordinated with the carboxymethyl cellulose had reached saturation and continued addition did not have a good improvement in the denitrification and dephosphorization effect.
In combination with example 1 and comparative example 1, it can be seen that the total nitrogen removal rate and the total phosphorus removal rate of comparative example 1 are significantly reduced as compared with example 1, indicating that the nitrogen and phosphorus removal effect of comparative example 1 is significantly reduced as compared with example 1. The reason for this may be that the bio-synergistic carrier used in comparative example 1 is free of added carboxymethyl cellulose, only diatomaceous earth is used as a carrier, a diatomaceous earth suspension layer is gradually formed in the sewage treatment process, microorganisms attached to diatomaceous earth can gradually absorb organic carbon sources in sewage and further meet energy required for self growth, but diatomaceous earth can be subjected to anaerobic expansion after absorbing the organic carbon sources, so that the original normal treatment effect is lost, and finally the denitrification and dephosphorization effects are reduced.
In combination with example 1 and comparative example 2, it can be seen that the total nitrogen removal rate and the total phosphorus removal rate of comparative example 2 are significantly reduced as compared with example 1, indicating that the nitrogen and phosphorus removal effect of comparative example 2 is significantly reduced as compared with example 1. The reason for this is probably that the surface of the bio-synergistic carrier used in comparative example 2 has no metal ion, and the phosphate released by the phosphorus accumulating bacteria can only be used as a carrier for sludge, but in the environment of low carbon source, the proliferation of sludge is slow, resulting in difficulty in maintaining a good and stable denitrification and dephosphorization effect.
In combination with example 1 and comparative example 3, it can be seen that the total nitrogen removal rate and the total phosphorus removal rate of comparative example 3 are significantly reduced as compared with example 1, indicating that the nitrogen and phosphorus removal effect of comparative example 3 is significantly reduced as compared with example 1. The reason for this is probably that only diatomite is used as the biological synergistic carrier in comparative example 3, no carboxymethyl cellulose is used as the stabilizer, no metal ion is used as the carrier for providing phosphate, the phosphorus accumulating bacteria and the denitrifying bacteria compete with each other for carbon sources in the environment of low carbon sources, and the overall denitrification and dephosphorization effect is greatly reduced in the condition of no additional carbon source.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. A zero-carbon source HJDL sewage treatment method is characterized in that an HJDL reaction tank is adopted; the HJDL reaction tank comprises a microorganism hatching system; the HJDL reaction tank is provided with a biological synergistic carrier and a composite microbial inoculum; the biological synergistic carrier is a carboxymethyl cellulose-diatomite carrier; metal ions are coordinated on the surface of the biological synergistic carrier; the metal ions comprise one or a combination of several of aluminum ions, ferrous ions, calcium ions, zinc ions and copper ions.
2. The zero-carbon source HJDL sewage treatment method according to claim 1, wherein the composite bacterial agent comprises one or a combination of several of composite denitrifying bacteria, composite dephosphorizing bacteria, composite COD bacteria and anaerobic bacterial agents.
3. The zero-carbon source HJDL sewage treatment method according to claim 1, wherein the raw materials of the bio-synergistic carrier comprise (20-40) by mass ratio: (3-8): 100, metal salts and diatomaceous earth.
4. The method for treating zero-carbon source HJDL sewage according to claim 3, wherein the method for preparing the bio-synergistic carrier comprises the following steps:
diatomite modification: adding diatomite into a hydrochloric acid solution, soaking for 4-6 hours at a constant temperature of 60-80 ℃, filtering, washing to be neutral, drying, grinding, and sieving with a 200-mesh sieve to obtain modified diatomite;
preparation of carboxymethyl cellulose-diatomaceous earth carrier: dispersing the modified diatomite in deionized water; dissolving carboxymethyl cellulose and sodium hydroxide in deionized water, adding the deionized water into modified diatomite solution, stirring and dispersing, adding an emulsifying agent and a crosslinking agent, and stirring and reacting for 1-2 h at 60-80 ℃; the temperature is reduced to 35-45 ℃, metal salt is added, stirring reaction is continued for 6-8 h, and then the carboxymethyl cellulose-diatomite carrier is obtained through suction filtration, washing, drying, grinding and sieving.
5. The method for treating zero-carbon source HJDL sewage according to claim 4, wherein said metal salt comprises one or more of aluminum chloride, aluminum sulfate, ferrous chloride, ferric sulfate, calcium chloride, copper sulfate, copper nitrate, and zinc chloride.
6. The zero-carbon source HJDL sewage treatment method according to claim 4, wherein the modified diatomite surface is further loaded with titanium dioxide.
7. The zero-carbon source HJDL sewage treatment method according to claim 6, wherein the modified diatomite loaded titanium dioxide is prepared by the following steps: adding butyl titanate into absolute ethyl alcohol, stirring uniformly, adding acetic acid, and continuing stirring until a transparent pale yellow liquid is formed; adding the modified diatomite into transparent pale yellow liquid, stirring and mixing, adding nitric acid, raising the temperature to 40-50 ℃, stirring and reacting for 4-6 hours, cooling and standing for 10-12 hours, then placing into a muffle furnace for roasting for 3-4 hours at 500-700 ℃, and grinding and sieving to obtain the modified diatomite-loaded titanium dioxide.
8. The method for treating zero-carbon source HJDL sewage according to claim 1, wherein the particle size of the bio-synergistic carrier is 200-400 mesh.
9. The zero-carbon source HJDL sewage treatment method according to claim 1, wherein the mass ratio of the added biological synergistic carrier to the composite microbial inoculum is 1: (0.2-0.4).
10. The zero carbon source HJDL sewage treatment method according to claim 1, comprising the steps of:
s1: filtering the sewage by a grid to obtain large-sized impurities and medium-sized impurities, and enabling the filtered sewage to enter the front end of the HJDL tank and flow into the HJDL reaction tank together with the return sludge mixed solution;
s2: the HJDL reaction tank comprises a microorganism incubation system, a stirring device and a reflux device, wherein sewage and reflux sludge mixed liquor enter the microorganism incubation system together with high-concentration microorganisms, and are incubated into HJDL granular sludge under the action of the microorganism incubation system and are sprayed out from the bottom in a pressurizing way; the stirring device is used for keeping mud, water and microorganisms in the HJDL reaction tank in a continuous motion state; the reflux device pumps the existing biological synergistic carrier and composite microbial inoculum in the HJDL reaction tank to the top end of the reactor, and the granulating process of the granulated sludge is continuously completed;
s3: and (3) allowing the water discharged from the HJDL reaction tank to enter a secondary sedimentation tank for standing and sedimentation, discharging bottom sludge in the secondary sedimentation tank, re-entering a mixed liquid of middle sludge and return sludge in the secondary sedimentation tank into the HJDL reaction tank for treatment, discharging sewage with qualified water quality index after sedimentation treatment in the secondary sedimentation tank, and finishing sewage treatment.
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