CN114409073B - Preparation method, system and application of synergistic denitrification composite filler - Google Patents
Preparation method, system and application of synergistic denitrification composite filler Download PDFInfo
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- CN114409073B CN114409073B CN202210170388.4A CN202210170388A CN114409073B CN 114409073 B CN114409073 B CN 114409073B CN 202210170388 A CN202210170388 A CN 202210170388A CN 114409073 B CN114409073 B CN 114409073B
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
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- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 18
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 9
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- 239000002994 raw material Substances 0.000 claims description 5
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- 235000010981 methylcellulose Nutrition 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052683 pyrite Inorganic materials 0.000 claims description 4
- 239000011028 pyrite Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 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
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 2
- 229910021646 siderite Inorganic materials 0.000 claims description 2
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention belongs to the field of sewage treatment, and relates to a preparation method, a system and application of a synergistic denitrification composite filler. The main components of the synergistic denitrification composite filler comprise sulfur, ferrous iron ore powder, carbonate powder, diatomite, a solid carbon source and an adhesive, after the components are uniformly mixed, water accounting for 20% -30% of the total mass is added by controlling a spraying device to continuously stir, when the humidity meets the requirements of molding equipment, the mixed material is placed in an extrusion molding machine to be molded, the obtained composite filler enters a heat treatment device to be heated to a semi-molten state, and is instantly cooled and molded by circulating water, and then is cut to obtain the cylindrical hollow composite filler with the inner diameter of 1.5cm and the height of 2-3 cm. The composite filler is used in biological sewage denitrification process, can provide larger attachment area for microorganisms, has more stable material structure and higher denitrification efficiency.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, relates to a sewage denitrification process, and in particular relates to preparation and application of a synergistic denitrification composite filler.
Background
The disclosure of this background section is only intended to increase the 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 already known to those of ordinary skill in the art.
How to improve the water quality of effluent from sewage treatment plants is a problem to be solved urgently. The water eutrophication can be caused by the excessive total nitrogen content in the water body, and the ecological environment is destroyed. The autotrophic heterotrophic co-denitrification process for biological denitrification of sewage can still maintain higher denitrification efficiency in low-carbon high-nitrogen wastewater, has less organic carbon source addition and low sludge yield, and is suitable for deep denitrification treatment of secondary biochemical effluent. The autotrophic denitrification filler is added independently, such as sulfur, limestone and the like, which is not beneficial to microorganism adhesion, is easy to run off along with water and is difficult to supplement. Some researches are carried out on mixing materials such as limestone and the like into molten sulfur, then cooling and granulating, the obtained filler is uniform in material quality and good in mass transfer effect, but the bulk density is high, investment cost is not saved, and the production process of the composite filler has strict requirements on equipment and environment because the sulfur is a flammable and explosive product, and the large-scale industrial production process is complex.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method and application of a synergistic denitrification composite filler.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a synergistic denitrification composite filler, which comprises the following raw materials in parts by weight: 50-80 parts of sulfur, 10-20 parts of ferrous iron ore powder, 10-20 parts of carbonate powder, 1-3 parts of diatomite, 5-10 parts of adhesive and 20-30 parts of solid carbon source.
The synergistic denitrification composite filler is mainly formed by mixing sulfur, ferrous iron ore powder, carbonate powder, diatomite, solid carbon source, adhesive and other materials, so that sulfur autotrophic denitrification, iron autotrophic denitrification and heterotrophic denitrification exist in the same system. The divalent iron mineral powder and sulfur simultaneously provide electron donors for autotrophic denitrification, can share denitrification load, reduce the concentration of sulfate radical of effluent, and prevent single iron autotrophic denitrification alkali production from forming an inert film for inhibiting denitrification. The defect of the reduction of the pH value in the single sulfur autotrophic denitrification process can be overcome when heterotrophic and autotrophic denitrification are used for co-denitrification. The carbonate powder provides inorganic carbon source for the system, and can supplement alkalinity to maintain acid-base balance of the system.
In a second aspect of the present invention, there is provided a method for preparing a synergistic denitrification composite filler, comprising:
uniformly mixing the materials; adding water accounting for 20-30% of the total mass of the materials, mixing and stirring to ensure that the humidity of the materials reaches the requirement of an extrusion molding machine;
the evenly mixed materials enter an extrusion molding machine for extrusion molding, and are extruded from a discharge port;
and heating the extruded filler to enable the filler to be in a semi-molten state, then performing instantaneous cooling molding by water cooling, and cutting to obtain the hollow-out filler of the column.
In a third aspect of the present invention, there is provided a preparation system of a synergistic denitrification composite filler, comprising: a mixing stirrer, a material storage device, an extrusion molding machine, a heat treatment device and a circulating water instant cooling device; the mixing stirrer, the material storage device, the extrusion molding machine, the heat treatment device and the circulating water instant cooling device are connected in sequence.
The invention has the beneficial effects that:
(1) The synergistic denitrification composite filler can simultaneously provide organic and inorganic carbon sources for denitrifying bacteria, and no additional carbon source is needed in the operation process of the system, so that the operation cost can be saved. Combines heterotrophic denitrification and autotrophic denitrification in the same system, and can neutralize H generated in the sulfur autotrophic denitrification process + Maintaining the acid-base balance of the system.
(2) The synergistic denitrification composite filler contains diatomite, has large specific surface area, high porosity and strong adsorption effect, can increase adsorption sites of microorganisms in the composite filler, can adsorb nitrate nitrogen in sewage, prolongs the residence time of the nitrate nitrogen in a system, and improves denitrification efficiency; in addition, the diatomite can provide trace metal elements for microorganisms, which is beneficial to the growth and propagation of the microorganisms.
(3) The synergistic denitrification composite filler is in a hollow column shape, the inner wall area is large, and a huge attachment area is provided for microorganisms. The stacking density is small, which is beneficial to saving investment cost.
(4) The synergistic denitrification composite filler is manufactured by a mechanical extrusion method, and has simple manufacturing equipment and working procedures and no complex pretreatment working procedures. After the denitrification filler is heated by a heat treatment device and is instantly cooled, the strength of the obtained filler is increased, the material structure is more stable, and the utilization rate of effective components can be improved.
(5) The preparation raw materials of the synergistic denitrification composite filler are nontoxic and biodegradable, the final product can be completely utilized, and the production process of the synergistic denitrification composite filler has no three wastes. The environmental strategy of integral prevention is adopted for the production process and the product, so that clean production is realized, and the social and economic benefits are maximized.
(6) The operation method is simple, low in cost, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a graph showing the denitrification effect of the conventional filler and the synergistic denitrification composite filler according to example 1.
FIG. 2 is a graph showing the denitrification effect of the semi-melt molded composite filler and the extrusion molded composite filler according to example 2.
FIG. 3 is a schematic view of the overall structure of the composite filler preparing apparatus;
wherein: 1-a water tank; 2-a water pump; 3-a mixing stirrer; 4-spraying device; 5-a motor; 6-an addition funnel; 7-valve; 8-a feed hopper; 9-a storage device; 10-a material conveying pump; 11-an extrusion molding machine; 12-a heat treatment device; 13-a circulating water instantaneous cooling device; 14-a cutting device; 15-packaging bags.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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.
The preparation of the synergistic denitrification composite filler mainly comprises sulfur, ferrous iron ore powder, carbonate powder, diatomite, solid carbon source, adhesive and the like, wherein the mass percentages of the components are as follows: 50-80% of sulfur, 10-20% of ferrous iron ore powder, 10-20% of carbonate powder, 1-3% of diatomite, 5-10% of adhesive and 20-30% of solid carbon source.
The denitrification filler is hollow in a column body with the inner diameter of 1.5cm and the height of 2-3 cm. The inner wall area is large, microorganisms can be adhered to the inner wall to form a biological film, the contact area between the effective components and the microorganisms is increased, and the impact on the microorganisms when the water quality of the inlet water is suddenly changed is prevented.
The denitrification filler contains a small amount of diatomite, adsorbs pollutants in water, prolongs the contact time of microorganisms and the pollutants, and improves the denitrification efficiency; meanwhile, trace metal elements can be provided for microorganisms, which is beneficial to the growth and propagation of the microorganisms.
The adhesive is an organic high molecular polymer specially prepared according to the material property, has strong cohesiveness and can increase the intensity of the denitrification filler. And the adhesive is a biodegradable material and plays a role in slowly releasing the effective components under the action of microorganisms.
The solid carbon source provides organic carbon source for microorganism, and can be one or more of polyvinyl alcohol, xanthan gum and methylcellulose.
The divalent iron ore powder can be one or more of siderite and pyrite.
The particle size of the sulfur, ferrous iron ore powder, carbonate powder, diatomite, solid carbon source and adhesive is 200-300 meshes.
The carbonate powder can provide an inorganic carbon source and maintain the acid-base balance of the system, and can be one or more of limestone, shell powder, bluestone and the like.
The materials firstly enter the mixing stirrer 3, parallel main shafts are arranged in the main shafts, a plurality of groups of symmetrical paddles are arranged on the main shafts, the main shafts are synchronously driven by a motor to synchronously stir the materials, so that the materials with different specific gravities are uniformly mixed. The mixing stirrer 3 is in a closed state, so that dust pollution caused in the stirring process is prevented. The mixing stirrer 3 is internally provided with a spraying device 4, and water is supplied from the water tank 1 through the water pump 2. The spraying device 4 sprays quantitative moisture into the materials while the materials are mixed by the mixer, so that the humidity of the materials reaches the requirement of the extrusion molding machine. The gravity control system is arranged in the storage device 9, the starting and stopping of the feeding device of the extrusion molding machine 11 are controlled through the gravity of the materials, and when the gravity reaches the required quantity of the extrusion molding machine 11, the material conveying pump 10 is started to complete feeding. The extrusion molding machine is provided with dies with different sizes and different shapes, and the composite filler is primarily obtained through extrusion molding. The feeding hole of the heat treatment device is designed according to the shape of the filler and is connected with the discharging hole of the extrusion molding machine 11, so that the filler can be ensured to directly and continuously enter from the discharging hole of the extrusion molding machine. The heat treatment device 12 is provided with an automatic temperature control system, and the temperature can be continuously controlled between 90 ℃ and 100 ℃. The rear end is connected with a circulating water instant cooling device 13, the composite filler subjected to heating treatment and instant cooling is subjected to final shaping, and the composite filler is cut by a cutting device 14 to obtain the synergistic denitrification composite filler.
No waste water or waste gas is generated in the production and operation process of the composite filler; dust removing devices are uniformly distributed in the whole production line, and dust can be collected and reused as raw materials of the composite filler, so that the problem of dust pollution is solved. All production equipment can automatically and continuously run, the degree of automation is high, manual operation is not needed, and the working efficiency can be improved.
The preparation method of the synergistic denitrification composite filler comprises the following steps:
(1) The materials such as sulfur, ferrous iron ore powder, carbonate powder, diatomite, solid carbon source, adhesive and the like firstly pass through a particle size screening device, so that the materials entering into granulating equipment are about 200-300 meshes. And returning the material with the oversized particle size to the crushing device for crushing and grinding.
(2) And (5) placing the materials into a powder mixing stirrer to be uniformly mixed. Adding water accounting for 20-30% of the total mass of the materials, mixing and stirring to ensure that the humidity of the materials reaches the requirements of an extrusion molding machine. The mixing stirrer is a closed device and is provided with a dust removing device, so that solid waste pollution is prevented.
(3) The evenly mixed materials enter the feeding device through the material conveying belt, a gravity control system is arranged in the feeding device, and when certain gravity is achieved, the feeding device is started to complete feeding. The conveyer belt is airtight conveyer belt to be equipped with dust collector, prevent to cause solid useless pollution.
(4) The materials enter an extrusion molding machine for extrusion molding, and are extruded from a discharge port.
(5) The rear end of the discharge hole is sequentially connected with a heat treatment device and a circulating water instant cooling device. The filler is heated at 90-100 ℃ to make the filler in a semi-molten state, and then is instantaneously cooled and molded by using circulating cooling water.
(6) Cutting the obtained filler to obtain the hollow cylindrical filler with the inner diameter of 1.5cm and the height of 2-3 cm.
The rear end of the discharge port is connected with a heat treatment device, and the heat treatment device is designed according to the shape of the filler, so that the filler can be ensured to directly enter from the discharge port of the extrusion molding machine. The heat treatment device is provided with a temperature control system, the temperature is controlled to be 90-100 ℃, and the extruded material is further heated to enable the filler to be in a semi-molten state. The rear end is connected with a circulating water instant cooling device, and the heat-treated filler is instantly cooled and molded under the action of cooling water. The heat treatment equipment, the circulating water instant cooling device and the extrusion molding machine are integrated, and the packing molding process can be automatically and continuously carried out without manual operation. The strength of the composite filler treated by the method is increased, and the utilization rate of the effective components is obviously improved.
The application of the synergistic denitrification composite filler is based on autotrophic denitrification and heterotrophic denitrification processes, the synergistic denitrification composite filler can be used for denitrification treatment of low-carbon high-nitrogen sewage, the composite filler is directly added to provide an electron donor for autotrophic denitrification, and meanwhile, an organic carbon source is provided for heterotrophic denitrification, so that higher denitrification efficiency can be maintained under the condition of low organic carbon source amount of inflow water.
The application of the synergistic denitrification composite filler is based on autotrophic denitrification and heterotrophic denitrification processes, and can be used for advanced treatment of tail water of sewage treatment plants. The composite filler can slowly release the organic carbon source without adding the organic carbon source additionally, so that poor denitrification effect or substandard effluent COD caused by improper carbon source adding amount is prevented. The composite filler simultaneously contains carbonate powder, the pH value of the buffer system is buffered, no additional medicament is required to be added, and the operation is simple.
The invention will now be described in further detail with reference to the following specific examples, which should be construed as illustrative rather than limiting.
A synergistic denitrogenation composite filler is prepared by mixing multiple effective components such as sulfur, ferrous ore powder, carbonate powder, diatomite, solid carbon source, and adhesive. The addition of a small amount of binder can increase the strength of the composite filler. The weight percentages of the components are as follows: 50-80% of sulfur, 10-20% of ferrous iron ore powder, 10-20% of carbonate powder, 1-3% of diatomite, 5-10% of adhesive and 20-30% of solid carbon source. The manufacturing steps are as follows: the sulfur, the divalent iron ore, the carbonate powder, the diatomite, the solid carbon source and the adhesive are placed into a mixing stirrer to be uniformly mixed, and water accounting for 20-30% of the total mass is added to be mixed and stirred, so that the humidity of the materials reaches the requirements of an extrusion molding machine. And placing the uniformly mixed materials into an extrusion molding machine for molding, performing heat treatment and instantaneous cooling on the molded filler, and cutting to obtain the cylindrical hollow filler with the inner diameter of 1.5 cm.
Example 1
55% of sulfur, 8% of pyrite, 15% of limestone powder, 2% of diatomite, 20% of methyl cellulose and 8% of adhesive by total mass are placed into a mixing stirrer to be uniformly mixed, and water accounting for 20% -30% of total mass is added to be mixed and stirred, so that the humidity of the materials reaches the requirements of an extrusion molding machine. The materials are extruded in an extrusion molding machine and then enter a heat treatment device, the filler is in a semi-molten state under the high temperature condition, and then the materials are instantaneously cooled and molded by using circulating cooling water. Cutting the obtained filler to obtain the hollow cylindrical filler with the inner diameter of 1.5cm and the height of 2-3 cm.
The denitrification effect of the prepared synergistic denitrification composite filler is compared with that of a conventional filler, the reactor is a cylinder with the height of 60cm and the inner diameter of 20cm, the water enters and exits from the bottom in a water inlet mode, and the sludge concentration is 3000mg/L. The inflow water is simulated wastewater prepared in a laboratory, the nitrate nitrogen concentration is 40mg/L, the COD concentration is 5mg/L, and the hydraulic retention time is 1h. After the synergistic denitrification composite filler group is started for 1 week, the concentration of the nitrate nitrogen in the effluent is within 3mg/L, the total nitrogen removal rate can reach more than 90%, and an organic carbon source is not required to be added in the operation process. The composite filler is not backwashed in the operation period of one year, and no obvious head difference loss exists. After the conventional filler group is started for 2 weeks, the concentration of the nitrate nitrogen in the effluent is within 10mg/L, the total nitrogen removal rate is over 70 percent, the organic carbon source amount is added to be 50 mg/L, and the concentration of the nitrate nitrogen in the effluent can be within 3 mg/L. Compared with the conventional filler, the composite filler has the advantages of short starting period, short microorganism adaptation period, high removal efficiency, no need of adding an organic carbon source in the operation process, simple operation and operation cost saving.
Example 2
55% of sulfur, 8% of pyrite, 15% of limestone powder, 2% of diatomite, 20% of methyl cellulose and 8% of adhesive by total mass are placed into a mixing stirrer to be uniformly mixed, and water accounting for 20% -30% of total mass is added to be mixed and stirred, so that the humidity of the materials reaches the requirements of an extrusion molding machine. And placing the uniformly mixed materials into an extrusion molding machine for molding, and cutting to obtain the hollow column filler with the inner diameter of 1.5cm and the height of 2-3 cm.
The composite filler (semi-melt molded composite filler) prepared in example 1 and the composite filler (extrusion molded composite filler) prepared in example 2 were subjected to a comparative experiment, wherein the reactor was a column with a height of 60cm and an inner diameter of 20cm, and the inlet and outlet were performed in a water inlet manner, and the sludge concentration was 3000mg/L. The inflow water is simulated wastewater prepared in a laboratory, the nitrate nitrogen concentration is 70-90mg/L, and the hydraulic retention time is 1h. After 2 weeks of starting time, the nitrate nitrogen removal rate of the semi-molten molding composite filler is more than 85% within 10 mg/L. After 5 weeks of starting time, the nitrate nitrogen removal rate of the extrusion molding compound filler effluent is more than 57 percent within 30 mg/L. Therefore, after semi-melt molding and instantaneous cooling, the effective components of the composite filler are easier to be utilized by microorganisms, and the denitrification effect is better. And under the impact of water flow and the action of microorganisms, the semi-melt molding composite filler structure is more stable compared with the extrusion molding composite filler.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified or substituted for some of them by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The preparation method of the synergistic denitrification composite filler is characterized by comprising the following steps:
uniformly mixing sulfur, ferrous iron ore powder, carbonate powder, diatomite, solid carbon source and adhesive; adding water accounting for 20-30% of the total mass of the materials, mixing and stirring to ensure that the humidity of the materials reaches the requirement of an extrusion molding machine;
the evenly mixed materials enter an extrusion molding machine for extrusion molding, and are extruded from a discharge port;
heating the extruded filler to enable the filler to be in a semi-molten state, then performing instantaneous cooling molding by water cooling, and cutting to obtain a hollow-out filler of a cylinder;
dust removing devices are uniformly distributed on the whole production line; heating the filler at 90-100deg.C;
the adopted synergistic denitrification composite filler consists of the following raw materials in parts by weight: 50-80 parts of sulfur, 10-20 parts of ferrous iron ore powder, 10-20 parts of carbonate powder, 1-3 parts of diatomite, 5-10 parts of adhesive and 20-30 parts of solid carbon source;
the filler is hollow-out filler with the inner diameter of 1.5-1.8 cm and the height of 2-3 cm;
the particle size of the sulfur, the ferrous iron ore powder, the carbonate powder, the diatomite, the solid carbon source and the adhesive is 200-300 meshes;
the divalent iron ore is one or more of siderite and pyrite;
the carbonate powder is one or more of limestone, shell powder and bluestone;
the solid carbon source is one or more of polyvinyl alcohol, xanthan gum and methyl cellulose.
2. The preparation method as claimed in claim 1, which comprises the following raw materials in parts by weight: 50-65 parts of sulfur, 10-15 parts of ferrous iron ore powder, 10-15 parts of carbonate powder, 1-2 parts of diatomite, 5-7.5 parts of adhesive and 20-25 parts of solid carbon source.
3. The preparation method according to claim 1, wherein the sulfur is 65-80 parts, the divalent iron ore powder is 15-20 parts, the carbonate powder is 15-20 parts, the diatomite is 2-3 parts, the binder is 7.5-10 parts, and the solid carbon source is 25-30 parts.
4. A method of preparation as claimed in any one of claims 1 to 3 wherein the binder is an organic high molecular polymer.
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| CN111056634A (en) * | 2020-01-15 | 2020-04-24 | 北京泰科智康环保科技有限公司 | Autotrophic denitrification carrier and preparation method thereof |
| CN111285462A (en) * | 2020-05-13 | 2020-06-16 | 北京涞澈科技发展有限公司 | Synergistic denitrification composite suspended filler, preparation method and application thereof |
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| CN111056634A (en) * | 2020-01-15 | 2020-04-24 | 北京泰科智康环保科技有限公司 | Autotrophic denitrification carrier and preparation method thereof |
| CN111285462A (en) * | 2020-05-13 | 2020-06-16 | 北京涞澈科技发展有限公司 | Synergistic denitrification composite suspended filler, preparation method and application thereof |
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