CN115490392A - Zero carbon source is thrown and is thrown municipal sewage and carry mark system - Google Patents
Zero carbon source is thrown and is thrown municipal sewage and carry mark system Download PDFInfo
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- CN115490392A CN115490392A CN202211000693.5A CN202211000693A CN115490392A CN 115490392 A CN115490392 A CN 115490392A CN 202211000693 A CN202211000693 A CN 202211000693A CN 115490392 A CN115490392 A CN 115490392A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 98
- 239000010865 sewage Substances 0.000 title claims abstract description 47
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 50
- 239000011593 sulfur Substances 0.000 claims abstract description 50
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000011001 backwashing Methods 0.000 claims abstract description 41
- 239000010802 sludge Substances 0.000 claims abstract description 32
- 238000005352 clarification Methods 0.000 claims abstract description 30
- 238000005243 fluidization Methods 0.000 claims abstract description 29
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 4
- 238000000746 purification Methods 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 229920002678 cellulose Polymers 0.000 claims description 32
- 239000001913 cellulose Substances 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 28
- VFKZECOCJCGZQK-UHFFFAOYSA-M 3-hydroxypropyl(trimethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCCO VFKZECOCJCGZQK-UHFFFAOYSA-M 0.000 claims description 24
- 229920002907 Guar gum Polymers 0.000 claims description 24
- 239000000665 guar gum Substances 0.000 claims description 24
- 229960002154 guar gum Drugs 0.000 claims description 24
- 235000010417 guar gum Nutrition 0.000 claims description 24
- XMPZTFVPEKAKFH-UHFFFAOYSA-P ceric ammonium nitrate Chemical compound [NH4+].[NH4+].[Ce+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XMPZTFVPEKAKFH-UHFFFAOYSA-P 0.000 claims description 21
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- 239000002351 wastewater Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000000376 reactant Substances 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 10
- 230000001376 precipitating effect Effects 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 229920000875 Dissolving pulp Polymers 0.000 claims description 9
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 claims description 7
- 238000004659 sterilization and disinfection Methods 0.000 claims description 7
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 6
- BKOOMYPCSUNDGP-UHFFFAOYSA-N 2-methylbut-2-ene Chemical group CC=C(C)C BKOOMYPCSUNDGP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000008394 flocculating agent Substances 0.000 claims description 4
- OYINQIKIQCNQOX-UHFFFAOYSA-M 2-hydroxybutyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCC(O)C[N+](C)(C)C OYINQIKIQCNQOX-UHFFFAOYSA-M 0.000 claims description 3
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 3
- 239000012295 chemical reaction liquid Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 64
- 230000000052 comparative effect Effects 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 239000000843 powder Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 9
- 229940037003 alum Drugs 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- FHDQNOXQSTVAIC-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;chloride Chemical compound [Cl-].CCCCN1C=C[N+](C)=C1 FHDQNOXQSTVAIC-UHFFFAOYSA-M 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000002608 ionic liquid Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to sewage treatment, and aims at the problem of high sewage upgrading energy consumption, the invention provides a zero-carbon-source-adding municipal sewage upgrading system which comprises a water inlet, a upgrading device, a lifting backwashing device and a water outlet which are sequentially connected, wherein a sludge fluidization clarification tank and a sulfur autotrophic denitrification filter tank which are communicated are arranged in the upgrading device, and sewage is directly flowed to the lifting backwashing device after being sequentially treated by the sludge fluidization clarification tank and the sulfur autotrophic denitrification filter tank; a mixer well is arranged between the label lifting device and the lifting backwashing device, sewage treatment reagents containing powdered carbon are arranged in the mixer well, water flow from the lifting backwashing device returns to the label lifting device through the mixer well for repeated purification, and the invention also carries out modification treatment on the powdered carbon, thereby improving the impurity removal capability of sewage. The upgrading device adopts the integrated design of sludge fluidization clarification and a sulfur autotrophic denitrification filter, the operation cost of the sulfur autotrophic denitrification process is low, no carbon source needs to be added, and the low-carbon and environment-friendly effects are achieved.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a zero-carbon-source-adding municipal sewage upgrading system.
Background
At present, the national discharge standard of municipal sewage plants is continuously improved from first-level B to first-level A and also to the surface standard four types in recent years, and the difficulty of the standard improvement lies in nitrogen and phosphorus removal, wherein chemical phosphorus removal is mostly adopted in the phosphorus removal process at present, and a denitrification filter tank is generally adopted in the nitrogen removal process. The currently adopted standard-lifting process is a high-efficiency sedimentation tank and a deep-bed filter tank process, for example, patent CN114804395A discloses a backwashing wastewater treatment device and a treatment process for a denitrification deep-bed filter tank, wherein backwashing wastewater of the denitrification deep-bed filter tank is intercepted to a middle lifting pump room, chemical agents are added into a water inlet coagulation area and a water inlet flocculation area of the high-efficiency sedimentation tank to remove total phosphorus and suspended matters, and the water inlet load of a sewage treatment plant is reduced by in-situ treatment in the high-efficiency sedimentation tank, the treatment of a biochemical system of the sewage treatment plant on return water is reduced, the dilution of the return water on the inlet water of the biochemical system of the sewage treatment plant is avoided, and the purpose of backwashing wastewater treatment is achieved. In addition, a large amount of carbon source needs to be added in the conventional denitrification process, the carbon source generally adopts sodium acetate, the cost of adding the carbon source is about 0.035 yuan/ton of water, the cost is high, and a large amount of carbon dioxide is discharged in the processes of carbon source production, transportation and denitrification, so that the conventional denitrification process does not accord with the current low-carbon and environment-friendly trend. Accordingly, an ideal solution is needed.
Disclosure of Invention
The invention aims to overcome the problem of high energy consumption in sewage upgrading, and provides a zero carbon source adding municipal sewage upgrading system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a zero carbon source adding municipal sewage upgrading system comprises a water inlet, a upgrading device, a lifting backwashing device and a water outlet which are sequentially connected, wherein a sludge fluidization clarification tank and a sulfur autotrophic denitrification filter tank which are communicated are arranged in the upgrading device, and sewage directly flows to the lifting backwashing device after being sequentially treated by the sludge fluidization clarification tank and the sulfur autotrophic denitrification filter tank; a mixer well is arranged between the label lifting device and the lifting backwashing device, a sewage treatment reagent containing powdered carbon is arranged in the mixer well, and water flow from the lifting backwashing device returns to the label lifting device through the mixer well for repeated purification; a backwashing wastewater pool is also arranged between the label lifting device and the lifting backwashing device, and backwashing wastewater from the label lifting device flows through the backwashing wastewater pool and flows back to the lifting backwashing device;
the powdered carbon is treated by the following steps:
1) Soaking powdered carbon in a hydrochloric acid solution, heating for reaction, filtering reaction liquid, and drying to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of pentene, reacting for a period of time, dissolving cellulose in a cuprammonium solution, dropwise adding the solution into the intermediate reaction solution, adding the modified powdered carbon prepared in the step 1), dispersing uniformly, continuously reacting to obtain a reactant, precipitating, washing, filtering and drying to obtain a product.
The upgrading device adopts the integrated design of sludge fluidization clarification and a sulfur autotrophic denitrification filter, the operation cost of the sulfur autotrophic denitrification process is low, 0.01 yuan/ton of water (filter material consumption cost) is combined, no carbon source is required to be added, and the low-carbon environment-friendly effect is realized.
Guar gum hydroxypropyl trimethyl ammonium chloride is copolymerized with amylene under the initiation of ceric ammonium nitrate to form three-dimensional reticular macromolecules, compared with guar gum hydroxypropyl trimethyl ammonium chloride, hard and soft segments in a copolymerization structure are combined, the area and the tension of the reticular structure are larger after water absorption, and more impurities can be intercepted. When the copolymerization reaction of guar gum hydroxypropyl trimethyl ammonium chloride and amylene is carried out to a half, modified powdered carbon and copper ammonia solution of cellulose are added for continuous reaction, the modified powdered carbon is uniformly dispersed on a net structure and plays an adsorption role in sewage, the powdered carbon is modified in the step 1), the carboxyl content on the surface of the powdered carbon is improved, and the modified powdered carbon is combined with the hydroxyl of the guar gum hydroxypropyl trimethyl ammonium chloride through carboxyl so that the combination is firmer; with copolymerizationIf the process is carried out, the cellulose can be interwoven among the net structures to enhance the density of the net structures; the cuprammonium solution initially exists as a solvent for cellulose, and can provide Cu after being added to the reaction solution 2+ Complexing with guar gum hydroxypropyl trimethyl ammonium chloride or modified powdered carbon to further improve the adsorption performance of the product on sewage impurities.
Preferably, the middle of the upgrading device is a sludge fluidization clarification tank, the two sides of the upgrading device are sulfur autotrophic denitrification filter tanks, the middle of the sludge fluidization clarification tank is provided with two coaxial cylindrical channels, the bottom of the inner cylindrical channel is communicated with an inlet of the upgrading device, the top of the inner cylindrical channel is opened, flocculating agents are added into the inner cylindrical channel, the top of the outer cylindrical channel is sealed with the upgrading device, the bottom of the outer cylindrical channel is opened, a plurality of layers of filtering partition plates are longitudinally arranged between the inner cylindrical channel and the outer cylindrical channel, an inclined tube is arranged between the outer cylindrical channel and the outer wall of the sulfur autotrophic denitrification filter tank, the top of the sulfur autotrophic denitrification filter tank is communicated with the upper part of the inclined tube, the bottom of the sulfur autotrophic denitrification filter tank is communicated with an outlet of the upgrading device, and sulfur autotrophic coupling filter materials are arranged in the middle of the sulfur denitrification filter tank. The sewage firstly passes through an inner side cylindrical channel of the sludge fluidization clarification tank from bottom to top and is fully contacted with a flocculating agent in the sludge fluidization clarification tank to remove large-particle solid impurities, then passes through a layer-upon-layer filtering partition plate from top to bottom to filter small-particle solid impurities, then passes through an inclined tube from bottom to top to further precipitate and separate the impurities, and finally passes through a sulfur autotrophic denitrification filter from top to bottom to denitrify, so that the treated sewage is discharged and subjected to the labeling device.
Preferably, an inclined plate is arranged between the sludge fluidization clarification tank and the sulfur autotrophic denitrification filter tank, the inclined plate is inclined from the middle to the two sides in an outward expansion mode, the inclined plate is provided with an opening, the inclined plate and the bottom of the label lifting device form an impurity collecting part, and the bottom of the label lifting device is provided with a sludge discharge port. The solid impurities after sewage treatment are deposited inside the inclined plate and discharged through the sludge discharge port after being collected.
Preferably, a sewage online tester, a valve and an overrunning pipe are arranged between the sludge fluidization clarification tank and the outlet of the upgrading device. When the computer finds that the total nitrogen of the effluent is lower than a set value (far lower than a discharge standard), the overtaking pipe is opened, namely one or two of the filter tanks are selected not to flow into the sulfur autotrophic filter layer, the effluent of the clarification tank is directly adopted and blended with other sulfur autotrophic filter tanks to obtain the effluent, and the effluent also reaches the discharge standard, so that the consumption of filter materials is saved. The conventional carbon source adding and denitrification process generally sets the amount of added carbon sources to control denitrification indexes, and because sulfur autotrophy does not need to add carbon sources, the denitrification level cannot be accurately controlled, the denitrification capability is often excessive, the total nitrogen of effluent is too low (far lower than the discharge standard), and the waste of filter material consumption is caused.
In order to avoid activity reduction caused by long-time non-use of sulfur autotrophic bacteria, a mode of rotating every 4 hours is adopted, so that the activity of the sulfur autotrophic bacteria is ensured, the consumption of filter materials is reduced, and meanwhile, the emission standard is met.
Preferably, a feeding well and a flow meter well are arranged between the lifting backwashing device and the mixer well, the flow meter well is controlled by a PLC, powdered carbon is firstly added into the feeding well, and the feeding amount and the feeding time of the powdered carbon entering the mixer well are controlled by the flow meter well. In order to avoid the COD which is difficult to degrade and causes the effluent COD to exceed the standard, a powdered carbon adding point is arranged, and the PLC automatically controls the adding amount and the adding time according to the difference value of the water inlet amount, the water inlet COD index and the preset COD index.
Preferably, the bottom of the sulfur autotrophic denitrification filter is connected with a fan, and the fan provides backwash air.
Preferably, a disinfection contact tank is arranged between the lifting backwashing device and the water outlet, and the disinfection contact tank contains sodium hypochlorite.
Preferably, the lifting backwashing device is also communicated with the secondary sedimentation water channel.
Preferably, the powdered carbon is treated by:
1) Immersing powdered carbon in H + Reacting in 1-2mol/L hydrochloric acid solution at 70-80 ℃ for 1-2h, filtering the reaction solution, and drying to obtain modified powdered carbon; the content of oxygen-containing functional groups such as carboxyl, hydroxyl and the like on the surface of the powdered carbon is improved.
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of pentene, and reacting at 40-60 ℃ for 1-2 hours to obtain an intermediate reaction solution; dissolving cellulose in a copper ammonia solution, dropwise adding the copper ammonia solution into the intermediate reaction solution, adding the modified powdered carbon prepared in the step 1), uniformly dispersing, and heating to 70-90 ℃ to continue reacting for 2-4h; and precipitating, washing, filtering and drying the reactant to obtain a product.
Preferably, the mass ratio of guar gum hydroxypropyl trimethyl ammonium chloride to amylene to cellulose to modified powdered carbon is 10 (2-3) to (1-2) to (1-4), and the mass ratio of Cu in cuprammonia solution is Cu 2+ The concentration of the cellulose is 1.4-1.8mol/L, and the mass fraction of the cellulose in the cuprammonia solution is 5-10%.
Therefore, the invention has the following beneficial effects: (1) The upgrading device adopts the integrated design of sludge fluidization clarification and a sulfur autotrophic denitrification filter, the operation cost of the sulfur autotrophic denitrification process is low, 0.01 yuan/ton of water (filter material consumption cost) is combined, no carbon source is required to be added, and the low-carbon environment-friendly effect is realized; (2) An overtaking pipe is arranged between the sludge fluidization clarification tank and an outlet of the upgrading device, when the computer finds that the total nitrogen of the discharged water is lower than a set value (far lower than a discharge standard), the overtaking pipe is opened, namely one (two) filtering tanks are selected not to flow into the sulfur autotrophic filtering layer, the water discharged from the clarification tank is directly adopted, and the consumption of the filtering material is saved; (3) In order to avoid the COD which is difficult to degrade and causes the effluent COD to exceed the standard, a powder activated carbon adding point is arranged, and the PLC automatically controls the adding amount and the adding time according to the difference value of the water inlet amount, the water inlet COD index and the preset COD index.
Drawings
FIG. 1 is a schematic diagram of the connection of the bidding system of the present invention;
FIG. 2 is a top view of the main portions of the bid system;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
FIG. 5 is a cross-sectional view C-C of FIG. 2;
fig. 6 is a cross-sectional view taken along line D-D of fig. 2.
In the figure: 1. the device comprises a label lifting device, 2, a mixer well, 3, a flowmeter well, 4, a feeding well, 5, a lifting backwashing device, 6, a disinfection contact tank, 7, a drainage pump station, 8, a water outlet, 9, a secondary sedimentation water channel, 10, a backwashing wastewater tank, 11, a first dosing room, 12, a second dosing room, 13, a fan room, 14, an inner side cylinder channel, 15, an outer side cylinder channel, 16, a filtering partition plate, 17, an inclined pipe, 18, a sulfur autotrophic coupling filter material, 19, an inclined plate, 20, an overrunning pipe, 21, a alum tank, 22, a PAM tank, 23, a sodium hypochlorite tank, 24 and a powdered carbon tank.
In FIG. 1: A. the device comprises a production water pipe, a back flushing assembly line B, a back flushing gas line C, a back flushing waste water line D, a back flushing waste water line E, a sodium hypochlorite feeding pipe, an F and alum feeding pipeline, a G and PAM feeding pipe, an H and powdered carbon feeding pipeline and a sludge discharge pipe I.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
In the present invention, unless otherwise specified, all the raw materials and equipments used are commercially available or commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
Example 1
The utility model provides a zero carbon source throws municipal sewage and carries mark system, as shown in figure 1, 2 and 5, 6, including water inlet, the mark device 1 of carrying that connects gradually, promote backwash device 5 and delivery port 8, carry and be equipped with the mud fluidization clarifier of intercommunication and sulphur autotrophic denitrification filter in the mark device 1, sewage is in proper order through mud fluidization clarifier and sulphur autotrophic denitrification filter after handling, directly flows to promotion backwash device 5 through production water pipe A. An adding well 4, a flow meter well 3 and a mixer well 2 are sequentially arranged between a lifting backwashing device 5 and a label lifting device 1, the adding well 4 is communicated with a powder carbon tank 24 (powder carbon is common commercially available powder carbon) of a chemical adding room II 12 through a powder carbon adding pipeline H, the flow meter well 3 is controlled by a PLC, the mixer well 2 is communicated with a alum tank 21 of a chemical adding room I11 through an alum adding pipeline F, the powder carbon is firstly added into the adding well 4, the adding amount and the adding time of the powder carbon and the alum are controlled by the flow meter well 3 to enter the mixer well 2, a sewage treatment reagent containing the powder carbon and the alum flows into the mixer well 2, and water flow coming out of the lifting backwashing device 5 returns to the label lifting device 1 through the mixer well 2 to be repeatedly purified. A backwashing wastewater pool 10 is also arranged between the mark lifting device 1 and the lifting backwashing device 5, and backwashing wastewater from the mark lifting device 1 flows through the backwashing wastewater pool 10 through a backwashing wastewater line D and flows back to the lifting backwashing device 5. The backwash water lifting the backwash device 5 can also flow back to the upgrading device 1 through the backwash water line B.
As shown in fig. 3 and 4, the middle of the label lifting device 1 is a sludge fluidization clarification tank, sulfur autotrophic denitrification filter tanks are arranged on two sides of the label lifting device 1, two coaxial cylindrical channels are arranged in the middle of the sludge fluidization clarification tank, the bottom of the inner cylindrical channel 14 is communicated with an inlet of the label lifting device 1, the top of the inner cylindrical channel 14 is opened, the PAM tank 22 of the first dosing room 11 is communicated with the PAM feeding pipe G, the top of the outer cylindrical channel 15 is sealed with the label lifting device 1, the bottom of the outer cylindrical channel 15 is opened, a plurality of layers of filtering partition plates 16 are longitudinally arranged between the inner cylindrical channel 14 and the outer cylindrical channel 15, an inclined pipe 17 is arranged between the outer cylindrical channel 15 and the outer wall of the sulfur autotrophic denitrification filter tank, the top of the sulfur autotrophic denitrification filter tank is communicated with the upper part of the inclined pipe 17, the bottom of the sulfur autotrophic denitrification filter tank is communicated with an outlet of the label lifting device 1, and a sulfur autotrophic coupling filter material 18 is arranged in the middle of the sulfur autotrophic denitrification filter tank. Sewage firstly passes through the inner side cylindrical channel 14 of the sludge fluidization clarification tank from bottom to top and is fully contacted with a flocculating agent PAM (polyacrylamide) therein to remove large-particle solid impurities, then passes through the layer-by-layer filtering partition plate 16 from top to bottom to filter small-particle solid impurities, then passes through the inclined tube 17 from bottom to top to further precipitate and separate impurities, and finally passes through the sulfur autotrophic denitrification filter from top to bottom to denitrify, so that the treated sewage is discharged out of the upgrading device 1. Be equipped with swash plate 19 between mud fluidization clarification tank and the sulphur autotrophy denitrification filtering pond, swash plate 19 expands the slope outward to both sides by the centre, and swash plate 19 is equipped with the opening, and swash plate 19 and 1 bottom formation impurity collection portion of upgrading device, and 1 bottom of upgrading device is equipped with the mud mouth. The solid impurities after sewage treatment are deposited inside the inclined plate 19 and discharged from the sludge discharge port through the sludge discharge pipe I after being collected. An online sewage tester, a valve and an overrunning pipe 20 are arranged between the sludge fluidization clarification tank and the outlet of the upgrading device 1. When the computer finds that the total nitrogen of the effluent is lower than a set value (far lower than a discharge standard), the overtaking pipe 20 is opened, namely one or two of the filter tanks are selected not to flow into the sulfur autotrophic filter layer, the effluent of the clarification tank is directly adopted and blended with other sulfur autotrophic filter tanks to obtain the effluent, and the effluent also reaches the discharge standard, so that the consumption of filter materials is saved. In order to avoid activity reduction caused by long-time non-use of sulfur autotrophic bacteria, a mode of rotating every 4 hours is adopted, so that the activity of the sulfur autotrophic bacteria is ensured, the consumption of filter materials is reduced, and meanwhile, the emission standard is met. The bottom of the sulfur autotrophic denitrification filter is connected with a fan, and the fan provides backwash air for the sulfur autotrophic denitrification filter through a backwash air line C.
And a disinfection contact tank 6 is arranged between the lifting backwashing device 5 and the water outlet 8, and the disinfection contact tank 6 is communicated with a sodium hypochlorite tank 23 of the dosing room II 12 through a sodium hypochlorite dosing pipe E. The lifting backwashing device 5 is also communicated with a secondary sedimentation ditch 9.
All the devices, namely the drainage pump station 7, the first dosing room 11, the second settling channel 9 and the fan room 13, are already in the past, and other devices are newly added to the upgrading system. The invention adopts the integrated design of sludge fluidization clarification and sulfur autotrophic denitrification filter tank on the contact of the prior device, has relatively small occupied area and investment, less equipment and management workload, does not need to add carbon source, and is energy-saving and environment-friendly.
Example 2
The difference from example 2 is that the powdered carbon was treated as follows:
1) Immersing commercially available powdered carbon in H + Reacting for 1h at 80 ℃ in 1mol/L hydrochloric acid solution, filtering and drying the reaction solution to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of 1-pentene, and reacting at 50 ℃ for 2 hours to obtain an intermediate reaction solution; dissolving cellulose in Cu 2+ The concentration of the solution is 1.5mol/L, 8wt% of cellulose solution is obtained, the cellulose solution is dripped into the intermediate reaction solution, the modified powdered carbon prepared in the step 1) is added, the dispersion is uniform, and the temperature is raised to 80 ℃ for continuous reaction for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of the guar gum hydroxypropyl trimethyl ammonium chloride to the pentene to the cellulose to the modified powdered carbon is 10.
Example 3
The difference from example 2 is that the powdered carbon was treated as follows:
1) Immersing commercial powdered carbon in H + Reacting for 1h at 80 ℃ in 1mol/L hydrochloric acid solution, filtering and drying the reaction solution to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding ceric ammonium nitrate solution, and drippingAdding an ethanol solution of 1-pentene, and reacting for 2 hours at 50 ℃ to obtain an intermediate reaction solution; dissolving cellulose in Cu 2+ The concentration of the solution is 1.5mol/L, 8wt% of cellulose solution is obtained, the cellulose solution is dripped into the intermediate reaction solution, the modified powdered carbon prepared in the step 1) is added, the dispersion is uniform, and the temperature is raised to 80 ℃ for continuous reaction for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of the guar gum hydroxypropyl trimethyl ammonium chloride to the pentene to the cellulose to the modified powdered carbon is 10.
Comparative example 1
The difference from example 2 is that the powdered carbon was treated as follows: dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of 1-pentene, and reacting at 50 ℃ for 2 hours to obtain an intermediate reaction solution; dissolving cellulose in Cu 2+ The concentration of the solution is 1.5mol/L, 8wt% of cellulose solution is obtained, the cellulose solution is dripped into the intermediate reaction solution, commercial powder carbon is added, the dispersion is uniform, and the temperature is raised to 80 ℃ for continuous reaction for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of guar gum hydroxypropyl trimethyl ammonium chloride to pentene to cellulose to powdered carbon is 10.
Comparative example 2
The difference from example 2 is that the powdered carbon was treated as follows:
1) Immersing commercial powdered carbon in H + Reacting for 1h at 80 ℃ in 1mol/L hydrochloric acid solution, filtering and drying the reaction solution to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding ceric ammonium nitrate solution, and dissolving cellulose in Cu 2+ The concentration of the solution is 1.5mol/L, 8wt% of cellulose solution is obtained, the cellulose solution is dripped into the intermediate reaction solution, the modified powdered carbon prepared in the step 1) is added, the dispersion is uniform, and the temperature is raised to 80 ℃ for continuous reaction for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of the guar gum hydroxypropyl trimethyl ammonium chloride to the cellulose to the modified powdered carbon is 10.
Comparative example 3
The difference from example 2 is that the powdered carbon was treated as follows:
1) Immersing commercially available powdered carbon in H + Reacting for 1h at 80 ℃ in 1mol/L hydrochloric acid solution, filtering and drying the reaction solution to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a cerium ammonium nitrate solution, dropwise adding an ethanol solution of 1-pentene, and reacting at 50 ℃ for 2 hours to obtain an intermediate reaction solution; dissolving cellulose in ionic liquid [ BMIM ] Cl to obtain 8wt% cellulose solution, dripping the cellulose solution into the intermediate reaction solution, adding the modified powdered carbon prepared in the step 1), uniformly dispersing, heating to 80 ℃, and continuing to react for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of the guar gum hydroxypropyl trimethyl ammonium chloride to the pentene to the cellulose to the modified powdered carbon is 10.
Comparative example 4
The difference from example 2 is that the powdered carbon was treated as follows:
1) Immersing commercial powdered carbon in H + Reacting for 1h at 80 ℃ in 1mol/L hydrochloric acid solution, filtering and drying the reaction solution to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of 1-pentene, and reacting at 50 ℃ for 2 hours to obtain an intermediate reaction solution; mixing Cu 2+ The copper ammonia solution with the concentration of 1.5mol/L is dripped into the intermediate reaction liquid, the modified powdered carbon prepared in the step 1) is added, the dispersion is uniform, and the temperature is raised to 80 ℃ for continuous reaction for 3 hours; precipitating, washing, filtering and drying reactants to obtain a product; the mass ratio of guar gum hydroxypropyl trimethyl ammonium chloride to pentene to cuprammonium solution to modified powdered carbon is 10.
Performance test
The powdered carbon or the treated powdered carbon of each of the above examples and comparative examples was subjected to a performance test. Taking the same batch of municipal sewage, adjusting the pH to about 7, dividing the municipal sewage into a plurality of parts, adding 10mg/L of medium-powder carbon or treated powder carbon into each part, stirring the mixture for 30min, standing and settling the mixture for 1h, extracting clear liquid to test each index of the sewage, and showing the results in the following table.
| Item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| COD mg/L of effluent | 30 | 16 | 18 | 21 | 25 | 20 | 22 |
| The output water TN mg/L | 13 | 7 | 9 | 10 | 12 | 9 | 10 |
Analysis the table above shows that example 1 uses common commercial powdered carbon, mainly adsorbing small organic molecules. In the embodiment 2, the carbon powder is gathered and loaded in the guar gum hydroxypropyl trimethyl ammonium chloride, pentene and cellulose mesh polymer, flocculation and adsorption effects are achieved, the surface area is increased, the impurity interception effect is better, and the COD and TN values of effluent are remarkably reduced compared with those of the embodiment 1.
Comparative example 1 no modification treatment was performed on the powdered carbon, and the active group exposure of the powdered carbon was insufficient, and the capability of adsorbing impurities or the firmness of connection with the polymer was decreased, thereby affecting the impurity removal effect. Comparative example 2 guar hydroxypropyltrimonium chloride is not copolymerized with pentene, guar hydroxypropyltrimonium chloride and cellulose are crosslinked, and the coordination of soft and hard connecting segments is lacked, so that the tension of a net structure is limited, and the impurity interception effect is reduced. The metal ions can improve the adsorption performance, so that the comparative example 3 has no metal ions added, and the impurity removal effect is reduced. In comparative example 4, no cellulose was added, and the network structure of the copolymer had large pores, which was not favorable for intercepting impurities. In example 3, the cellulose is used in an excessive amount, because the modified powdered carbon and the copper ammonia solution of the cellulose are added to continue the reaction when the copolymerization reaction of the guar gum hydroxypropyl trimethyl ammonium chloride and the amylene is half, the cellulose is interwoven among the net structures along with the progress of the copolymerization reaction, the density of the net structures is enhanced, but if the cellulose is excessive, the activated carbon is shielded, and the overall impurity removal effect is reduced, so that the cellulose dosage needs to be controlled within a reasonable range.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A zero carbon source adding municipal sewage upgrading system is characterized by comprising a water inlet, a upgrading device, a lifting backwashing device and a water outlet which are sequentially connected, wherein a sludge fluidization clarification tank and a sulfur autotrophic denitrification filter tank which are communicated are arranged in the upgrading device, and sewage is directly flowed to the lifting backwashing device after being sequentially treated by the sludge fluidization clarification tank and the sulfur autotrophic denitrification filter tank; a mixer well is arranged between the label lifting device and the lifting backwashing device, a sewage treatment reagent containing powdered carbon is arranged in the mixer well, and water flow from the lifting backwashing device returns to the label lifting device through the mixer well for repeated purification; a backwashing wastewater pool is also arranged between the label lifting device and the lifting backwashing device, and backwashing wastewater from the label lifting device flows through the backwashing wastewater pool and flows back to the lifting backwashing device;
the powdered carbon is treated by the following steps:
1) Soaking powdered carbon in a hydrochloric acid solution, heating for reaction, filtering reaction liquid, and drying to obtain modified powdered carbon;
2) Dissolving guar gum hydroxypropyl trimethyl ammonium chloride in water, adding a ceric ammonium nitrate solution, dropwise adding an ethanol solution of pentene, reacting for a period of time, dissolving cellulose in a cuprammonium solution, dropwise adding the solution into the intermediate reaction solution, adding the modified powdered carbon prepared in the step 1), uniformly dispersing, continuously reacting to obtain a reactant, precipitating, washing, filtering and drying to obtain a product.
2. The zero-carbon-source-feeding municipal sewage upgrading system according to claim 1, characterized in that a sludge fluidization clarification tank is arranged in the middle of the upgrading device, sulfur autotrophic denitrification filters are arranged on two sides of the sludge fluidization clarification tank, two coaxial cylindrical channels are arranged in the middle of the sludge fluidization clarification tank, the bottom of the inner cylindrical channel is communicated with an inlet of the upgrading device, the top of the inner cylindrical channel is open, a flocculating agent is fed into the inner cylindrical channel, the top of the outer cylindrical channel is sealed with the upgrading device, the bottom of the outer cylindrical channel is open, a plurality of layers of filtering partition plates are longitudinally arranged between the inner cylindrical channel and the outer cylindrical channel, an inclined tube is arranged between the outer cylindrical channel and the outer wall of the sulfur autotrophic denitrification filter, the top of the sulfur autotrophic denitrification filter is communicated with the upper part of the inclined tube, the bottom of the sulfur autotrophic denitrification filter is communicated with an outlet of the upgrading device, and a sulfur autotrophic coupling filter material is arranged in the middle of the sulfur denitrification filter.
3. The zero-carbon-source-feeding municipal sewage upgrading system according to claim 2, wherein an inclined plate is arranged between the sludge fluidization clarification tank and the sulfur autotrophic denitrification filter tank, the inclined plate is inclined from the middle to the two sides in an outward expanding manner, the inclined plate is provided with an opening, the inclined plate and the bottom of the upgrading device form an impurity collecting part, and the bottom of the upgrading device is provided with a sludge discharge port.
4. The zero-carbon-source-adding municipal sewage upgrading system as claimed in claim 2 or 3, characterized in that an online sewage tester, a valve and an overrun pipe are arranged between the sludge fluidization clarification tank and the outlet of the upgrading device.
5. The zero-carbon-source-feeding municipal sewage upgrading system as claimed in claim 1, characterized in that a feeding well and a flow meter well are provided between the lifting backwash device and the mixer well, the flow meter well is controlled by the PLC, the powdered carbon is fed into the feeding well first, and the feeding amount and the feeding time of the powdered carbon into the mixer well are controlled by the flow meter well.
6. The zero-carbon-source-feeding municipal sewage upgrading system according to claim 1, wherein the bottom of the sulfur autotrophic denitrification filter tank is connected with a fan, and the fan provides backwash air.
7. The zero-carbon-source-feeding municipal sewage upgrading system according to claim 1, 5 or 6, characterized in that a disinfection contact tank is arranged between the lifting backwashing device and the water outlet, and the disinfection contact tank contains sodium hypochlorite.
8. The zero-carbon-source-added municipal sewage upgrading system according to claim 1, characterized in that step 2) guar hydroxypropyltrimonium chloride is dissolved in water, ceric ammonium nitrate solution is added, ethanol solution of pentene is added dropwise, and reaction is carried out at 40-60 ℃ for 1-2h to obtain intermediate reaction solution; dissolving cellulose in a copper ammonia solution, dropwise adding the copper ammonia solution into the intermediate reaction solution, adding the modified powdered carbon prepared in the step 1), uniformly dispersing, heating to 70-90 ℃, and continuously reacting for 2-4 hours to obtain a reactant; and precipitating, washing, filtering and drying the reactant to obtain a product.
9. The zero carbon source adding municipal sewage upgrading system as claimed in claim 8, wherein the mass ratio of guar gum hydroxypropyl trimethyl ammonium chloride, amylene, cellulose and modified powdered carbon in the step 2) is 10 (2-3) to (1-2) to (1-4), and Cu in cuprammonium solution is Cu 2+ The concentration of the cellulose is 1.4-1.8mol/L, and the mass fraction of the cellulose in the cuprammonium solution is 5-10%.
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