CN115677034A - Combined filler ball for sewage treatment - Google Patents
Combined filler ball for sewage treatment Download PDFInfo
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- CN115677034A CN115677034A CN202110876916.3A CN202110876916A CN115677034A CN 115677034 A CN115677034 A CN 115677034A CN 202110876916 A CN202110876916 A CN 202110876916A CN 115677034 A CN115677034 A CN 115677034A
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- sewage treatment
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- 239000000945 filler Substances 0.000 title claims abstract description 180
- 239000010865 sewage Substances 0.000 title claims abstract description 39
- 230000003197 catalytic effect Effects 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000011068 loading method Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 239000004745 nonwoven fabric Substances 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 229910000502 Li-aluminosilicate Inorganic materials 0.000 claims description 4
- HZVVJJIYJKGMFL-UHFFFAOYSA-N almasilate Chemical compound O.[Mg+2].[Al+3].[Al+3].O[Si](O)=O.O[Si](O)=O HZVVJJIYJKGMFL-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 16
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 43
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 28
- 229910052757 nitrogen Inorganic materials 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- 239000010802 sludge Substances 0.000 description 12
- 244000005700 microbiome Species 0.000 description 11
- 238000011049 filling Methods 0.000 description 10
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- 230000008569 process Effects 0.000 description 8
- 229910002651 NO3 Inorganic materials 0.000 description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005453 pelletization Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 5
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- 239000012895 dilution Substances 0.000 description 5
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- 238000002360 preparation method Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 3
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- 239000012798 spherical particle Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 239000003344 environmental pollutant Substances 0.000 description 2
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- 238000010438 heat treatment Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 238000012851 eutrophication Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000405 induce cancer Toxicity 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 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 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical group O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention provides a combined filler ball for sewage treatment. In order to solve the problem that the existing filler cannot simultaneously have high sewage treatment effect and low operation cost, the invention provides a combined filler ball for sewage treatment, which comprises a filler composition and a plastic filter ball for loading the filler composition, wherein the filler composition comprises an electron donor catalytic filler accounting for 30-50% of the total mass of the combined filler ball, a biochar filler accounting for 15-20% of the total mass of the combined filler ball, and an inert filler accounting for 30-45% of the total mass of the combined filler ball. On the premise of not increasing the operation cost, the high-efficiency sewage treatment is realized, and the service life of the artificial wetland is prolonged.
Description
Technical Field
The invention belongs to the technical field of new water treatment materials, and particularly relates to a combined filler ball for sewage treatment.
Background
The natural water ecosystem including wetland and the like has a certain sewage treatment function. The artificial wetland strengthens a natural water ecological system, improves hydrodynamic control factors by adding the filler, and can strengthen the removal effect of the wetland system on COD, ammonia nitrogen and total phosphorus. However, with the improvement of living standard, the discharge amount of nitrogen-containing organic matters or inorganic matters in sewage such as urban domestic sewage, industrial wastewater, rural sewage, landfill leachate and the like is increasing day by day, and pollutants in water are gradually changed from elements such as COD (chemical oxygen demand), ammonia nitrogen and the like into eutrophic substances and substances with ecological toxic and side effects, which mainly comprise nitrate nitrogen, phosphate and disinfection by-products. Especially NO 3 Increasing levels of-N contamination, NO worldwide 3 The area involved in N contamination is also becoming more and more widespread, NO 3 N pollution becomes the most common pollution factor which is difficult to effectively remove in sewage treatment, and becomes the most complex environmental problem in the world. Excessive harm of nutrient inorganic salts such as nitrogen, phosphorus and the like can cause eutrophication of water bodies, cause death of aquatic organisms, endanger survival of plants, influence health of human beings, inhibit oxygen therapy capability of blood, even induce cancers, endanger life and the like. The prior constructed wetland system is designed with filler, microorganism and plant systems which have limited capability of removing the prior pollutants.
Conventional techniques for nitrate removal include physical, chemical and biological-based ion exchange, adsorption, reverse osmosis, chemical reduction, and biological denitrification processes, among others. However, the nitrate water body removal process mainly relying on physics and chemistry has practical and design defects. For example, these ion exchange processes can only separate nitrate from aqueous solutions and produce spent resins and concentrated nitrate, but cannot completely remove nitrate, thereby producing large volumes of secondary brine waste resulting in relatively expensive post-processing costs. The adsorption method is influenced by the particle size, pH and temperature of different adsorption materials, shows different adsorption capacities, and limits the practical engineering application of the adsorption method in the aspect of general nitrate sewage treatment. In order to achieve higher removal efficiency, the chemical method selects active main reducing materials, causes the main reducing products to be ammonia nitrogen, and cannot fundamentally remove the nitrogen pollution of the water body.
More and more fillers are being developed for sewage treatment. For example: patent CN 101671150B discloses a filler composed of cement, limestone, polymeric ferric sulfate particles, polyacrylic resin, water and water glass, which is mixed into slurry by each component, poured into a mold and formed by adding water glass; CN 101508481B discloses a wetland filler composed of oyster shells, volcanic ash, expanded sinter and activated carbon; patent CN109847699A discloses that zeolite, activated carbon and iron powder are used as main fillers to remove ammonia nitrogen and phosphate by physical adsorption, which mainly belongs to the aforementioned physical denitrification category, and the removal target is ammonia nitrogen. But the denitrogenation effect of above-mentioned patent is limited, and current patent CN111137973 provides a denitrogenation filler, and its component includes iron carbon filler, iron fillings granule, sulphur granule and biological activity charcoal, and the sewage total nitrogen gets rid of the effect and is up to 63.46% the most, and the total nitrogen clearance is waited to further improve.
The existing mainstream sewage treatment process is just to utilize an organic carbon source to add heterotrophic denitrification reaction and realize high-efficiency sewage treatment by an improved enhanced denitrification filler, but also has the following problems: 1. when the adding amount of the carbon source exceeds the standard, the carbon source residue exists in the effluent, so that the COD exceeds the standard; when the adding amount of the carbon source is insufficient, the reaction in the denitrification process is incomplete, and NO in effluent water 3 Failure of N to reach the standard or the presence of NO 2 -accumulation of N; 2. the addition of a large amount of carbon source can cause the propagation of a large amount of microorganisms, and the amount of the generated excess sludge is increased; 3. the addition of excessive organic carbon source results in increased operating costs and increased operating expenses. In addition, when the existing filler is used, the filler at the lower end part is crushed along with the time, so that the wetland is blocked, and the service life of the artificial wetland is shortened.
Therefore, the existing filler needs to be optimized, efficient sewage treatment is realized on the premise of not increasing the operation cost, and meanwhile, the service life of the constructed wetland can be prolonged.
Disclosure of Invention
Aiming at the problems, the invention provides a combined filler which can realize high-efficiency sewage treatment and prolong the service life of the constructed wetland on the premise of not increasing the operation cost.
In order to solve the technical problem, the invention adopts the following technical scheme:
the invention provides a combined filler ball for sewage treatment, which comprises a filler composition and a plastic filter ball for loading the filler composition,
the filler composition comprises an electron donor catalytic filler accounting for 30-50% of the total mass of the combined filler spheres, a biochar filler accounting for 15-20% of the total mass of the combined filler spheres and an inert filler accounting for 30-45% of the total mass of the combined filler spheres.
Preferably, the electron donor catalytic filler comprises, by mass, 10% to 40% of zero-valent iron powder, 20% to 40% of sulfur powder, and 20% to 50% of aluminosilicate composite adhesive.
More preferably, the particle size of the iron powder is 200 to 400 meshes.
More preferably, the particle size of the sulfur powder is 100-200 meshes.
Preferably, the aluminosilicate composite adhesive is a magnesium aluminosilicate and lithium aluminosilicate composite adhesive.
Preferably, the particle size of the electron donor catalytic filler is 6-10 mm.
Preferably, the particle size of the biological carbon filler is 4-8 mm.
Preferably, the inert filler is limestone or gravel, and the particle size of the inert filler is 6-10 mm.
Preferably, the mass of the plastic filter ball is 3-8% of the total mass of the combined type filler ball.
Preferably, the diameter of the plastic filter ball is 5-10 cm.
The second aspect of the invention provides a preparation method of the combined filler ball, which comprises the steps of mixing the electron donor catalytic filler, the biological carbon filler and the inert filler, filling the mixture into a non-woven fabric filler bag, and then packaging the non-woven fabric filler bag into the plastic filter ball.
The third aspect of the invention also provides an application of the combined filler ball in sewage treatment.
The invention also provides an artificial wetland system using the combined filler balls.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the combined filler ball, various types of fillers are compounded, and the components are optimized, so that efficient denitrification is realized at low cost, and the sewage treatment efficiency is obviously improved; meanwhile, the composition in a specific proportion is packaged in the plastic filter ball, so that the problem of wetland blockage caused by filler crushing after sewage treatment for a period of time can be solved, and compared with the operation of directly mixing multiple fillers in proportion, the filler components in the whole wetland are more consistent, so that the sewage treatment effect is more stable.
Drawings
FIG. 1 is a diagram of the electron donor catalytic filler product in the combined filler spheres of the invention.
Detailed Description
Because the main pollution source in the sewage is gradually changed into NO 3 N, in the prior art, an organic carbon source is mostly utilized to be added for heterotrophic denitrification reaction, and the improved enhanced denitrification filler is used for realizing high-efficiency sewage treatment. However, when the feeding proportion of the carbon source and the reinforced denitrification filler is not proper, the sewage treatment effect and the growth of aquatic animals and plants are seriously influenced; meanwhile, the components of the existing filler for sewage treatment are complex, the cost is high, and in addition, the filler at the lower end part is crushed along with the time in the using process of the existing filler, so that the wetland is blocked, and the service life of the artificial wetland is shortened. Therefore, the prior art cannot simultaneously consider low operation cost, high sewage treatment effect and long service life of the wetland.
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The invention designs a combined filler ball for sewage treatment, which combines and uses an electron donor catalytic filler, a biological carbon filler and an inert filler according to a certain mass proportion, and encapsulates the combination of the two fillers into plastic.
According to some embodiments, the filler composition comprises 30 to 50% by mass of the combined filler spheres of the electron donor catalytic filler, 15 to 20% by mass of the biochar filler, and 30 to 45% by mass of the inert filler, wherein the mass of the plastic filter spheres is 3 to 8% by mass of the combined filler spheres.
According to some embodiments, the electron donor catalytic filler comprises, by mass, 10% to 40% of zero-valent iron powder, 20% to 40% of sulfur powder, and 20% to 50% of aluminosilicate composite adhesive.
Through a great deal of research, the inventor simplifies the components of the electron donor catalytic filler, optimizes the component proportion of the electron donor catalytic filler, and then combines the electron donor catalytic filler with the biochar filler and the inert filler for use, and finds that the sewage treatment effect can be improved without obviously increasing the cost.
In some embodiments, the iron powder has a particle size of 200 to 400 mesh.
In some embodiments, the sulfur powder has a particle size of 100 to 200 mesh.
In some embodiments, the aluminosilicate composite adhesive is a magnesium aluminosilicate and lithium aluminosilicate composite adhesive.
Specifically, the electron donor catalytic filler is granular, and the particle size of the electron donor catalytic filler is 6-10 mm.
The preparation method of the electron donor catalytic filler comprises the following steps: (1) Uniformly mixing the iron powder, the sulfur powder and the composite adhesive in the proportion to obtain mixed powder for later use; and (2) carrying out rotary granulation by using a round-pot pelletizing granulator. Pelletizing and granulating through the pelletizing granulator in the step (2), adding the mixed powder in the step (1), repeating manual humidification after the product is preliminarily molded and dried, and adding the powder. The diameter of the product is increased by about 1-4 mm in one-time bonding granulation, and the process is repeated for 3-4 times according to the requirement of the wetland filler particle size to generate the filler product with the particle size of 6-10 mm. And (4) feeding the pellet finished product into a production line for heating and drying treatment, and feeding the treated pellet finished product into a particle screening machine to screen out a catalytic filler with a target particle size for later use. The electron donor catalytic filler is shown in figure 1.
Specifically, the used biological carbon filler is cylindrical, and the particle size of the biological carbon filler is 4-8 mm.
Specifically, the inert filler is spherical particles, the inert filler is limestone or gravel, and the particle size of the inert filler is 6-10 mm.
In some embodiments, the mass of the plastic filter balls is 3-8% of the total mass of the combined filler balls.
Specifically, the used plastic filter ball is spherical, and the diameter of the plastic filter ball is 5-10 cm.
The preparation method of the combined filler ball comprises the following steps: mixing the electron donor catalytic filler, the biological carbon filler and the inert filler, filling the mixture into a non-woven fabric filler bag, and then packaging the non-woven fabric filler bag into the plastic filter ball.
The embodiment part also provides an artificial wetland system using the combined packing ball.
In the wetland construction process, the prepared filler filter balls are directly put into a wetland system.
The embodiment section also specifically provides an application of the combined filler ball in sewage treatment.
More specifically, activated sludge in an anoxic pond of a domestic sewage treatment plant can be selected for system inoculation in the initial operation stage of the system. After dilution (suspended particles are about 200-400 mg/L), activated sludge is used as raw water to be matched and filled with the filler by a wet method, and the filler and inoculated sludge are kept to be fully and uniformly mixed. The water level of the filling material is kept higher than that of the upper layer filling material. After inoculation, the filler system is maintained for a stabilization time of about 24 to 48 hours, and the microorganisms are ensured to be fully contacted and mixed. And then adjusting water inflow according to the hydraulic retention time of about 12 hours, and after acclimatization, reducing the hydraulic retention time and improving the hydraulic load according to the water quality condition after every 3 to 5 days. Finally, the total nitrogen removal effect can reach 95.21%, and the total nitrogen of effluent can be reduced to 1.72mg/L.
The present invention will be further described with reference to the following examples. However, the present invention is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not mentioned are conventional conditions in the industry. The technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
In the present invention, "%" means mass percent unless otherwise specified.
Example 1:
the filler component: 30.0 percent of catalytic filler of electron donor, 20.0 percent of biochar filler, 45.0 percent of inert filler and 5 percent of plastic filter ball.
Selecting raw materials: the electron donor catalytic filler is granular and has a diameter of 6-10mm, and the electron donor catalytic filler comprises the following raw materials: the composite adhesive comprises an electron donor catalytic filler, iron powder with the particle size of 200-400 meshes, sulfur powder with the particle size of 100-200 meshes, magnesium aluminosilicate and lithium aluminosilicate;
the biochar filler is cylindrical and has the grain diameter of 4-8 mm;
the inert filler is spherical particles with the particle size of 6-10mm, and the inert filler is limestone;
the preparation method of the electron donor catalytic filler comprises the following steps: (1) Uniformly mixing iron powder, sulfur powder and a composite adhesive according to a mass ratio of 1.5; and (2) carrying out rotary granulation by using a round-pot pelletizing granulator. Pelletizing and granulating through the pelletizing granulator in the step (2), adding the mixed powder in the step (1), repeating manual humidification after the product is preliminarily molded and dried, and adding the powder. The diameter of the product is increased by about 1-4 mm by one-time bonding granulation, and the process is repeated for 3-4 times according to the requirement of the wetland filler particle size to generate filler product particles with the diameter of 6-10 mm. And (4) feeding the pellet finished product into a production line for heating and drying treatment, and feeding the treated pellet finished product into a particle screening machine to screen out a catalytic filler with a target particle size for later use. The electron donor catalytic filler is shown in figure 1.
Preparing raw materials: the electron donor catalytic filler, the biochar filler and the inert filler are weighed and mixed, packaged in a non-woven fabric filler bag and then packaged in a plastic filter ball.
The patent product application: after dilution (suspended particles are about 200-400 mg/L), activated sludge is used as raw water and is matched with filler by a wet method for filling, and the filler and inoculated sludge are maintained to be fully and uniformly mixed, wherein the filler accounts for 40-70% of the space of the artificial wetland system; and after the completion of filling, starting to domesticate tail water of a secondary sedimentation tank of a sewage treatment plant after the microorganisms are grown and attached for 24 hours. The water inflow quantity is kept stable, and the primary microorganism selection domestication accumulation time is 2-3 weeks. Continuously monitoring the water inlet and the water outlet of the denitrification enhancement system, and calculating the average values in the period, wherein the nitrate nitrogen in the inlet/outlet water is 15.75/1.78mg/L, the ammonia nitrogen in the inlet/outlet water is 0.24/0.34mg/L, the hydraulic retention time of the system is 3.43 hours, the total nitrogen removal effect of the equipment is about 88.76 percent, and the total nitrogen in the outlet water is 2.12mg/L.
Example 2:
the combined filler spheres are essentially the same as in example 1, except that the filler components: 50.0 percent of electron donor catalytic filler, 15.0 percent of biochar filler, 30.0 percent of inert filler and 5 percent of plastic filter ball.
The patent product application: after dilution (suspended particles are about 200-400 mg/L), activated sludge is used as raw water and is matched with filler by a wet method for filling, and the filler and inoculated sludge are maintained to be fully and uniformly mixed, wherein the filler accounts for 40-70% of the space of the artificial wetland system; and after the completion of filling, starting to domesticate tail water of a secondary sedimentation tank of a sewage treatment plant after the microorganisms are grown and attached for 24 hours. The water inflow quantity is kept stable, and the time for the selective acclimation and accumulation of the primary microorganisms is 2-3 weeks. Continuously monitoring the water inlet and the water outlet of the denitrification enhancement system, and calculating the average values in the period, wherein the nitrate nitrogen in the inlet/outlet water is 28.32/1.36mg/L, the ammonia nitrogen in the inlet/outlet water is 0.21/0.36mg/L, the hydraulic retention time of the system is 3.5 hours, the total nitrogen removal effect of the equipment is about 95.21 percent, and the total nitrogen in the outlet water is 1.72mg/L.
Comparative example 1:
the filler component: 30% of biochar filler, 65.0% of inert filler and 5% of plastic filter ball.
Selecting raw materials: wherein the biochar filler is cylindrical and has a particle size of 4-8mm, the inert filler is spherical particles with a particle size of 6-10mm, and the inert filler is limestone.
Preparing raw materials: the materials needed in the filler are weighed and mixed, packaged in a non-woven fabric filler bag and then packaged in a plastic filter ball.
The effect of the comparative test is as follows: after dilution (suspended particles are about 200-400 mg/L), activated sludge is used as raw water and is matched and filled with filler by a wet method, and the filler and inoculated sludge are kept to be fully and uniformly mixed, wherein the filler accounts for 40-70% of the space of the artificial wetland system; and after the completion of filling, starting to domesticate tail water of a secondary sedimentation tank of a sewage treatment plant after the microorganisms are grown and attached for 24 hours. The water inflow quantity is kept stable, and the primary microorganism selection domestication accumulation time is 2-3 weeks. Continuously monitoring the water inlet and the water outlet of the denitrification enhancement system, and calculating the average values in the period, wherein the nitrate nitrogen in the inlet/outlet water is 15.56/14.73mg/L, the ammonia nitrogen in the inlet/outlet water is 0.22/0.21mg/L, the hydraulic retention time of the system is 3.43 hours, the total nitrogen removal effect of the equipment is about 5.7 percent, and the total nitrogen in the outlet water is 14.94mg/L.
Comparative example 2:
the filler component: 50% of pyrite filler, 45% of inert filler and 5% of plastic filter ball.
The effect of the comparative test is as follows: after dilution (suspended particles are about 200-400 mg/L), activated sludge is used as raw water and is matched and filled with filler by a wet method, and the filler and inoculated sludge are kept to be fully and uniformly mixed, wherein the filler accounts for 40-70% of the space of the artificial wetland system; and after the filling is finished, the tail water of the secondary sedimentation tank of the sewage treatment plant is fed for domestication after the microorganisms are grown and attached for 24 hours. The water inflow quantity is kept stable, and the time for the selective acclimation and accumulation of the primary microorganisms is 2-3 weeks. Continuously monitoring the water inlet and the water outlet of the denitrification enhancement system, and calculating the average values in the period, wherein the nitrate nitrogen in the inlet/outlet water is 26.76/20.13mg/L, the ammonia nitrogen in the inlet/outlet water is 0.27/0.24mg/L, the hydraulic retention time of the system is 3.5 hours, the total nitrogen removal effect of the equipment is about 24.6 percent, and the total nitrogen in the outlet water is 20.37mg/L.
The invention includes but is not limited to the above embodiments, and a person skilled in the art may vary further embodiments within the claims of the invention.
Claims (10)
1. A combination formula filled ball for sewage treatment which characterized in that: the combined filler ball comprises a filler composition and a plastic filter ball used for loading the filler composition,
the filler composition comprises an electron donor catalytic filler accounting for 30-50% of the total mass of the combined filler spheres, a biochar filler accounting for 15-20% of the total mass of the combined filler spheres and an inert filler accounting for 30-45% of the total mass of the combined filler spheres.
2. The combined filler ball of claim 1, wherein: the electron donor catalytic filler comprises, by mass, 10-40% of zero-valent iron powder, 20-40% of sulfur powder and 20-50% of aluminosilicate composite adhesive.
3. The combined filler ball of claim 2 wherein: the particle size of the iron powder is 200-400 meshes; the particle size of the sulfur powder is 100-200 meshes.
4. The combined filler ball of claim 2 wherein: the aluminosilicate composite adhesive is a magnesium aluminosilicate and lithium aluminosilicate composite adhesive.
5. The combined filler ball of claim 1, wherein: the particle size of the electron donor catalytic filler is 6-10 mm.
6. The composite filler ball of claim 1 wherein: the grain diameter of the biological carbon filler is 4-8 mm.
7. The composite filler ball of claim 1 wherein: the inert filler is limestone or gravel, and the particle size of the inert filler is 6-10 mm.
8. The composite filler ball of claim 1 wherein: the mass of the plastic filter ball is 3-8% of the total mass of the combined filler ball, and the diameter of the plastic filter ball is 5-10 cm.
9. A method for preparing the combined filler ball as claimed in any one of claims 1 to 8, wherein the electron donor catalytic filler, the biochar filler and the inert filler are mixed, packed in a non-woven fabric filler bag and then encapsulated in the plastic filter ball.
10. Use of a composite filler ball according to any one of claims 1 to 8 in sewage treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110876916.3A CN115677034A (en) | 2021-07-31 | 2021-07-31 | Combined filler ball for sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110876916.3A CN115677034A (en) | 2021-07-31 | 2021-07-31 | Combined filler ball for sewage treatment |
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| CN115677034A true CN115677034A (en) | 2023-02-03 |
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| CN202110876916.3A Pending CN115677034A (en) | 2021-07-31 | 2021-07-31 | Combined filler ball for sewage treatment |
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| CN (1) | CN115677034A (en) |
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2021
- 2021-07-31 CN CN202110876916.3A patent/CN115677034A/en active Pending
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