CN114573103A - Preparation method and application of efficient denitrification composite filler - Google Patents
Preparation method and application of efficient denitrification composite filler Download PDFInfo
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- CN114573103A CN114573103A CN202210339183.4A CN202210339183A CN114573103A CN 114573103 A CN114573103 A CN 114573103A CN 202210339183 A CN202210339183 A CN 202210339183A CN 114573103 A CN114573103 A CN 114573103A
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- 239000000945 filler Substances 0.000 title claims abstract description 61
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 46
- 239000011593 sulfur Substances 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 32
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 24
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 24
- 239000011707 mineral Substances 0.000 claims abstract description 24
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 238000005469 granulation Methods 0.000 claims abstract description 11
- 230000003179 granulation Effects 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229910052683 pyrite Inorganic materials 0.000 claims description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 3
- 239000011028 pyrite Substances 0.000 claims description 3
- 229910021646 siderite Inorganic materials 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 2
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 claims description 2
- 230000002195 synergetic effect Effects 0.000 claims description 2
- 229910001608 iron mineral Inorganic materials 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 20
- 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 abstract description 15
- 244000005700 microbiome Species 0.000 abstract description 15
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000010802 sludge Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
-
- 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
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- 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)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a high-efficiency denitrification composite filler suitable for a biological denitrification process of sewage, and a preparation method and application thereof. The main components of the high-efficiency denitrification composite filler comprise sulfur, ferrous minerals, carbonate powder, activated carbon and an adhesive, the components are weighed according to a certain proportion and placed in a mixing stirrer to be uniformly mixed, then the mixture is placed in a sulfur melting kettle to be heated and melted to obtain a molten state mixture, and then the molten state mixture is pumped into a granulation device to be molded and granulated. The composite filler is used for the biological denitrification process of sewage and can provide a larger attachment area for microorganisms. By using the prepared filler, under the anaerobic condition, the microorganisms can convert nitrate nitrogen in the sewage with low carbon source and high nitrogen content into nitrogen, and sulfur and ferrous minerals provide electron donors for the autotrophic denitrification process; the carbonate powder provides an inorganic carbon source and alkalinity, and plays a role in buffering pH.
Description
Technical Field
The disclosure relates to the technical field of sewage treatment, relates to a sewage deep denitrification process, and in particular relates to a preparation method and application of a high-efficiency denitrification composite filler.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The autotrophic denitrification technology gradually becomes the main research direction of the novel biological denitrification process due to the advantages of no need of adding organic carbon source, reduction of sludge yield, improvement of denitrification efficiency and the like. The sulfur autotrophic denitrification technology takes sulfur as an electron donor, and nitrate nitrogen is converted into nitrogen under the action of sulfur autotrophic microorganisms to complete the denitrification process. The process does not need additional organic carbon source, can save the operating cost and reduce the sludge yield. However, the reaction process consumes alkalinity, which is easy to reduce the pH value of the system, and alkalinity needs to be supplemented generally.
At present, most of fillers used in the autotrophic denitrification process are sulfur, limestone and the like which are added independently, the particles are large, the specific surface area is small, the attachment of microorganisms is not facilitated, and the fillers are easy to run off along with water and difficult to supplement. The sulfur is a flammable and explosive product and is listed in the Ministry of dangerous chemicals in China, and the sulfur has certain risks in storage and use and is limited in purchasing channels. Iron autotrophic denitrification technology uses iron element or Fe2+Is an electron donor, nitrate is an electron acceptor, and the denitrification process is completed under the action of microorganisms. Alkali is produced in the process of iron autotrophic denitrification, ferric iron precipitate is easy to form and is attached to the surface of sludge, the denitrification reaction of microorganisms is influenced, and the denitrification efficiency is reduced. Some melt-mixed formed autotrophic denitrification fillers have large brittleness and poor flexibility, and have unstable strength under the action of water flow impact and microorganisms, and the period for replacing the fillers is short, so that the operation cost is increased. Therefore, an efficient and safe denitrification composite filler preparation technology is urgently needed, and the problems that the filler safety is poor, the preparation process is complex and the stability is not high in the autotrophic denitrification process in the prior art are solved.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a preparation method and application of a high-efficiency denitrification composite filler, which integrates various natural minerals such as sulfur, ferrous minerals, carbonate powder and the like according to a certain proportion, and realizes high mixing of effective components. Provides a new idea for the research of autotrophic denitrification technology.
In order to achieve the above object, a first aspect of the present invention provides a method for preparing a high efficiency denitrification composite filler, comprising:
putting the sulfur, ferrous mineral, carbonate powder, active carbon and adhesive in a powder mixing stirrer according to a certain proportion for uniform mixing,
putting the mixed material into a sulfur melting kettle for heating and melting;
pumping the molten mixed material into a granulation device for granulation, and cooling and forming by circulating cooling water to obtain the high-efficiency denitrification composite filler;
preferably, the mass percentages of the components are as follows: 60-80% of sulfur, 5-20% of divalent iron ore, 5-20% of carbonate powder, 1-5% of active carbon and 5-10% of adhesive.
Preferably, the carbonate powder is one or more of limestone, shell powder, bluestone and the like.
Preferably, the ferrous mineral is one or more of siderite and pyrite.
Preferably, the high-efficiency denitrification composite filler is spherical with the particle size of 3-6mm and the specific gravity of 1.5-1.8g/cm3。
Preferably, the sulfur, ferrous mineral, carbonate powder, activated carbon, binder and the like are all powder with the particle size of 200-300 meshes.
Preferably, the temperature of the sulfur melting kettle is 115-180 ℃.
Preferably, the sulfur, the ferrous mineral, the carbonate powder, the activated carbon and the adhesive are placed in a powder mixing stirrer according to a certain proportion and are uniformly mixed, instead, the sulfur is placed in a sulfur melting kettle for melting, and then the molten sulfur is uniformly mixed with the ferrous mineral, the carbonate powder, the activated carbon and the adhesive;
further, the ferrous mineral, the carbonate powder, the activated carbon and the adhesive are preheated to 115-180 ℃.
The second aspect of the invention provides an application of the preparation method of the high-efficiency denitrification composite filler in sewage treatment.
Preferably, the filler is used as a filler of a deep denitrification reactor behind a biochemical pool based on autotrophic denitrification reaction and is used for deep denitrification of tail water of a sewage treatment plant;
or directly adding the sewage into the tank A to perform autotrophic and heterotrophic synergetic biological denitrification in the low-carbon high-nitrogen sewage.
Compared with the prior art, the invention has the beneficial effects that:
(1) the method provides an electron donor for the autotrophic denitrification process, improves the denitrification efficiency, and can supplement alkalinity and maintain the acid-base balance of the system.
(2) The present disclosure integrates the effective components of elemental sulfur, ferrous minerals, carbonate powder, etc. into one integral, and has homogeneous material, high mass transfer effect, stable stuffing structure and easy feeding and transportation.
(3) The preparation method of the high-efficiency denitrification composite filler disclosed by the invention is mixed with a small amount of adhesive, so that the composite filler has certain strength. The adhesive is a biodegradable material, is slowly released under the action of microorganisms without residue, and has no harmful effect on the microorganisms.
(4) The specific gravity of the high-efficiency denitrification composite filler is 1.5-1.8g/cm3The fertilizer is not easy to run off along with water, is convenient to add, has large specific surface area and is easy for microorganism attachment. The special forming treatment mode improves the utilization rate of the effective components.
(5) Other materials are mixed in the sulfur, so that the ignition point of the sulfur can be obviously improved, and the safety of the filler in the transportation and storage processes is guaranteed.
(6) The system can perform balanced regulation and control on the structure and performance of a product according to the characteristics of water quality and water quantity so as to ensure long-term stable operation of the system.
(7) The method can be used for denitrification treatment of low-carbon high-nitrogen sewage, can keep higher denitrification efficiency without adding an organic carbon source, avoids effluent from not reaching the standard due to improper dosage of the organic carbon source, and saves the dosage cost of the carbon source. Moreover, the growth period of the autotrophic microorganisms is long, residual sludge is not generated basically, and the sludge treatment cost is saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a graph comparing the concentrations of nitrate nitrogen in effluent of two fillers in example 1.
FIG. 2 is a graph showing the nitrate nitrogen concentration in inlet and outlet water in example 2.
FIG. 3 is a graph showing the nitrate nitrogen concentration in inlet and outlet water in example 3.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
the efficient denitrification composite filler is mainly formed by unifying various natural minerals such as sulfur, ferrous minerals, carbonate powder and the like into a whole according to a certain proportion, and realizes high mixing of effective components. The sulfur autotrophic denitrification process and the iron autotrophic denitrification process are combined in the same system, and meanwhile, the carbonate powder supplements the alkalinity to maintain the acid-base balance of the system and provide an inorganic carbon source. The ferrous mineral can provide an electron donor for the denitrification process, share the denitrification load of the sulfur autotrophic denitrification, and simultaneously generate alkalinity to make up for the defect of alkalinity consumption of the sulfur autotrophic denitrification. The mixture of the sulfur and other components can obviously improve the ignition point of the filler, so that the safety of the filler in the transportation and storage processes is guaranteed.
The composite filler additionally contains a small amount of activated carbon, so that pollutants in water can be adsorbed, and the contact time of microorganisms and nitrate is prolonged. The impact resistance of the filler can be improved by mixing a small amount of biodegradable adhesive, the effective components are slowly released under the action of microorganisms, and the adhesive is non-toxic and has no harmful effect on the growth of the microorganisms.
The composite filler is spherical with the grain diameter of 3-6mm, has large specific surface area, provides larger contact area for microorganism attachment and has good mass transfer effect.
A high-efficiency denitrifying composite filler is prepared from sulfur, ferrous mineral, carbonate powder and activated carbon through mixing and processing. The small amount of adhesive can raise the strength of the composite stuffing. The weight percentage of each component is as follows: 60-80% of sulfur, 5-20% of ferrous mineral, 5-20% of carbonate powder, 1-5% of active carbon and 5-10% of adhesive. The manufacturing steps are as follows: putting the sulfur, ferrous mineral, carbonate powder, activated carbon and adhesive into a mixing stirrer to be uniformly mixed, putting into a sulfur melting kettle, and heating to 115-180 ℃ for melting. Or, putting the sulfur into a sulfur melting kettle for melting, and then uniformly mixing the molten sulfur with the ferrous mineral preheated to 115-180 ℃, the carbonate powder, the activated carbon and the adhesive. And pumping the molten mixed material into a granulation device for granulation, and cooling and forming by circulating cooling water to obtain the high-efficiency denitrification composite filler.
Example 1
The preparation method comprises the steps of putting 70% of sulfur, 20% of siderite, 9% of shell powder, 1% of active carbon and 5% of adhesive in total mass into a powder mixing stirrer, uniformly mixing, and putting into a sulfur melting kettle for heating and melting. And pumping the molten mixed material into a granulation device for granulation, and cooling and forming through circulating cooling water to obtain the efficient denitrification composite filler. The composite filler is spherical with the grain diameter of 3-6 mm.
The prepared high-efficiency denitrification composite filler is compared with a conventional filler, water is fed in with uniform water quality and flow, and the data indexes of the water outlet of the two fillers are compared, as shown in figure 1. The concentration of the nitrate nitrogen of the inlet water is 200-220mg/L, after 3 weeks of starting time, the concentration of the nitrate nitrogen of the outlet water is about 80-120mg/L during the conventional filling, and the concentration of the nitrate nitrogen of the outlet water is greatly fluctuated along with the concentration of the inlet water; the concentration of the nitrate nitrogen of the effluent is within 20mg/L when the filler is compounded, and the concentration of the nitrate nitrogen of the effluent is relatively stable.
Example 2
The procedure for preparing the composite filler was the same as in example 1.
The prepared high-efficiency denitrification composite filler is used as a filler of a deep denitrification reactor behind a biochemical pool and is used for deep denitrification of tail water of a sewage treatment plant. The reactor is a multi-gallery biofilter, and the water inlet mode is from top to bottom. After the sewage comes from the oxidation ditch process of a certain municipal sewage plant, the concentration of nitrate nitrogen in the sewage is 20-30 mg/L. The original back-end process is a biological filter, the hydraulic retention time is 2 hours, the concentration of effluent nitrate nitrogen is about 16mg/L, back flushing is carried out every 2-3 days during the operation period, and an organic carbon source is required to be added. After the reactor is transformed into a deep denitrification reactor, the high-efficiency denitrification composite filler is added, the hydraulic retention time is 2 hours, and after 3 weeks of starting time, the concentration of effluent nitrate nitrogen is within 5 mg/L. And performing back flushing every 5-7 days during the operation period. Compared with the conventional biological filter filler, the application of the high-efficiency denitrification composite filler can improve the denitrification efficiency and the denitrification precision, does not need an additional organic carbon source and reduces the operation cost.
Example 3
The preparation method comprises the steps of putting 60% of sulfur, 24% of pyrite, 15% of limestone, 1% of activated carbon and 8% of adhesive in total mass into a powder mixing stirrer, uniformly mixing, and putting into a sulfur melting kettle for heating and melting. And pumping the molten mixed material into a granulation device for granulation, and cooling and forming through circulating cooling water to obtain the efficient denitrification composite filler. The composite filler is spherical with the grain diameter of 3-6 mm.
The prepared high-efficiency denitrification composite filler is added into an anoxic tank for autotrophic and heterotrophic biological denitrification. The sewage comes from the effluent of the anaerobic reactor, the concentration of nitrate nitrogen in the influent is 50-60mg/L, the starting time is 2 weeks after the composite filler is added, the adding amount of the organic carbon source is gradually reduced, and the content of the nitrate nitrogen in the effluent can be ensured to be within 10 mg/L. Compared with the conventional AO denitrification process, the method saves 60-80% of the organic carbon source dosage, reduces the sludge yield and lowers the operation cost. The autotrophic denitrification and the heterotrophic denitrification are coordinated for denitrification, so that the starting time can be shortened, and the impact resistance of the system is improved.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the foregoing embodiments or equivalent substitutions for some technical features, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the high-efficiency denitrification composite filler is characterized by comprising the following steps:
putting the sulfur, the ferrous mineral, the carbonate powder, the active carbon and the adhesive in a powder mixing stirrer according to a certain proportion for uniform mixing,
putting the mixed material into a sulfur melting kettle for heating and melting;
and pumping the molten mixed material into a granulation device for granulation, and cooling and forming by circulating cooling water to obtain the high-efficiency denitrification composite filler.
2. The preparation method of the high-efficiency denitrification composite filler according to claim 1, wherein the mass percentages of the components are as follows: 60-80% of sulfur, 5-20% of ferrous iron mineral, 5-20% of carbonate powder, 1-5% of active carbon and 5-10% of adhesive.
3. The method for preparing the high-efficiency denitrification composite filler according to claim 1, wherein the carbonate powder is one or more of limestone, shell powder, bluestone and the like.
Preferably, the ferrous mineral is one or more of siderite and pyrite.
4. The method for preparing the high-efficiency denitrification composite filler according to claim 1, wherein the high-efficiency denitrification composite filler is a ball with the particle size of 3-6mmThe specific gravity of the product is 1.5-1.8g/cm3。
5. The method for preparing the high efficiency denitrification composite filler according to claim 1, wherein the sulfur, ferrous minerals, carbonate powder, activated carbon, binder and the like are all powders with particle size of 200-300 meshes.
6. The method for preparing the high efficiency denitrification composite filler as claimed in claim 1, wherein the temperature of the sulfur melting kettle is 115-180 ℃.
7. The method for preparing the high-efficiency denitrification composite filler according to claim 1, wherein the sulfur, the ferrous mineral, the carbonate powder, the activated carbon and the adhesive are proportionally and uniformly mixed in a powder mixing stirrer, the sulfur is instead put in a sulfur melting kettle for melting, and then the molten sulfur is uniformly mixed with the ferrous mineral, the carbonate powder, the activated carbon and the adhesive.
8. The method for preparing the high efficiency denitrification composite filler according to claim 7, wherein the ferrous mineral, the carbonate powder, the activated carbon and the binder are preheated to 115-180 ℃.
9. The use of the method of preparing the high efficiency denitrification composite filler according to the claims 1-8 in sewage treatment.
10. The use according to claim 9, based on autotrophic denitrification reaction, as a filler for a deep denitrification reactor after a biochemical pool, for deep denitrification of tail water from a sewage treatment plant;
or directly adding the sewage into the tank A to perform autotrophic and heterotrophic synergetic biological denitrification in the low-carbon high-nitrogen sewage.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259372A (en) * | 2022-08-29 | 2022-11-01 | 合肥工业大学 | Autotrophic denitrification material, and preparation method and application thereof |
| CN115385446A (en) * | 2022-09-14 | 2022-11-25 | 山东太平洋环保股份有限公司 | Sulfur autotrophic and heterotrophic coupling denitrification device and method |
| CN115417500A (en) * | 2022-09-29 | 2022-12-02 | 江西零真生态环境集团有限公司 | Sulfur autotrophic denitrification filler and preparation method thereof |
| CN115583719A (en) * | 2022-09-15 | 2023-01-10 | 天津若金智能环保科技有限公司 | Autotrophic denitrification filter material and preparation method and application thereof |
| CN116002871A (en) * | 2022-12-26 | 2023-04-25 | 浙江清华长三角研究院 | Reinforced denitrification filler and preparation method and application thereof |
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| CN116002871A (en) * | 2022-12-26 | 2023-04-25 | 浙江清华长三角研究院 | Reinforced denitrification filler and preparation method and application thereof |
| CN116161823A (en) * | 2023-03-20 | 2023-05-26 | 山东太平洋环保股份有限公司 | Industrial sewage collaborative denitrification system and method |
| CN116854246A (en) * | 2023-06-30 | 2023-10-10 | 长江生态环保集团有限公司 | Preparation method and application of sulfur autotrophic denitrification filler |
| CN116715357A (en) * | 2023-08-11 | 2023-09-08 | 上海勘测设计研究院有限公司 | Composite filler, denitrification filter and denitrification method for sulfur autotrophic denitrification biological denitrification |
| CN117105405A (en) * | 2023-08-25 | 2023-11-24 | 广东卓信环境科技股份有限公司 | Composite sulfur autotrophic denitrification filler and preparation method thereof |
| CN117285157A (en) * | 2023-10-11 | 2023-12-26 | 北京天诚众合科技发展有限公司 | Denitrifying bacteria culture complexing agent for degrading nitrogen in sewage, and preparation method and application thereof |
| CN117285157B (en) * | 2023-10-11 | 2024-04-09 | 北京天诚众合科技发展有限公司 | Denitrifying bacteria culture complexing agent for degrading nitrogen in sewage, and preparation method and application thereof |
| CN117550714A (en) * | 2023-12-21 | 2024-02-13 | 广东卓信环境科技股份有限公司 | Sulfur autotrophic denitrification filler |
| CN117550714B (en) * | 2023-12-21 | 2024-09-17 | 广东卓信环境科技股份有限公司 | Sulfur autotrophic denitrification filler |
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