CN114873720A - Method for improving denitrification performance of sulfur autotrophic denitrification filter - Google Patents
Method for improving denitrification performance of sulfur autotrophic denitrification filter Download PDFInfo
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- CN114873720A CN114873720A CN202210385078.4A CN202210385078A CN114873720A CN 114873720 A CN114873720 A CN 114873720A CN 202210385078 A CN202210385078 A CN 202210385078A CN 114873720 A CN114873720 A CN 114873720A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 62
- 239000011593 sulfur Substances 0.000 title claims abstract description 61
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005291 magnetic effect Effects 0.000 claims abstract description 62
- 241000894006 Bacteria Species 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 15
- 230000035755 proliferation Effects 0.000 claims abstract description 8
- 238000011065 in-situ storage Methods 0.000 claims abstract description 6
- 238000005728 strengthening Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 101
- 239000002245 particle Substances 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 17
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000000969 carrier Substances 0.000 claims description 3
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 2
- 229910000828 alnico Inorganic materials 0.000 claims description 2
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 241000894007 species Species 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 239000002131 composite material Substances 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 229910021646 siderite Inorganic materials 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 235000019738 Limestone Nutrition 0.000 description 6
- 239000006028 limestone Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 241001509286 Thiobacillus denitrificans Species 0.000 description 5
- 238000003837 high-temperature calcination Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000001404 mediated effect Effects 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Images
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
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of 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
Abstract
A method for improving the denitrification performance of a sulfur autotrophic denitrification filter belongs to the technical field of sewage treatment. The basic principle of the method is that a magnetic medium is added into the sulfur autotrophic denitrification filter tank, and the activity and proliferation rate of sulfur autotrophic denitrification bacteria are improved in situ by utilizing the endogenous magnetic strengthening effect of the magnetic medium, so that the denitrification load of the filter tank is improved, the denitrification performance of the filter tank is enhanced, and the start-up time of the filter tank is shortened. In the technical system, the magnetic medium is used as an inert magnetic source, does not participate in the reaction, has no secondary pollution and can be repeatedly utilized. The method has obvious effect and low cost, and is suitable for engineering application.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a technical method for enhancing the denitrification performance of a sulfur autotrophic denitrification filter in situ by adding an endogenous magnetic medium.
Background
Excessive discharge of nitrogen pollutants in sewage easily causes eutrophication of surface water and harms human health, so that China sets strict discharge standards for nitrogen in sewage. Sulfur autotrophic denitrification is often of great interest as a terminal advanced treatment technology. At present, the sulfur autotrophic denitrification technology is mainly realized in the form of a filter tank in practical application, and a filler carrier is considered as the core and the key of the filter tank.
At present, the research discloses a sulfur autotrophic denitrification filter carrier filler which comprises the following components: sulfur + calcium carbonate, sulfur + pyrite, sulfur + siderite, sulfur + pyrite + siderite, and the like. In order to further improve the denitrification efficiency of the composite filler system, researchers mainly enhance the specific surface area of the composite filler by bonding granulation and high-temperature calcination technologies, improve the loading capacity of microorganisms and further improve the denitrification efficiency. However, these methods do not improve the activity and proliferation rate of sulfur autotrophic denitrifying bacteria. Meanwhile, the high cost of the binding granulation and high-temperature calcination technology limits the application of the technology in practical engineering. Therefore, the method needs to improve the activity and proliferation rate of the sulfur autotrophic denitrifying bacteria, enhance the denitrification performance of the denitrification filter and shorten the starting time of the denitrification filter.
In view of the above problems, the present inventors have proposed a method of adding a magnetic medium to a known sulfur autotrophic denitrification system. The activity and the proliferation rate of the sulfur autotrophic denitrifying bacteria are improved in situ by utilizing the endogenous magnetic strengthening effect of the magnetic medium, so that the load biomass of the sulfur autotrophic denitrifying bacteria on the filter carrier is improved, the denitrification performance is improved, and the start-up time of the filter is shortened.
Disclosure of Invention
The invention aims to improve the denitrification performance of the sulfur autotrophic denitrification filter and shorten the starting time of the sulfur autotrophic denitrification filter.
The invention provides a method for improving the denitrification performance of a sulfur autotrophic denitrification filter, which is characterized by comprising the following steps: by adding the magnetic medium into the sulfur autotrophic denitrification filter, the activity and proliferation rate of the sulfur autotrophic denitrification bacteria are improved in situ by utilizing the endogenous magnetic strengthening effect of the magnetic medium, so that the denitrification load of the filter is improved, and the denitrification performance of the filter is enhanced.
The magnetic carrier is an inert medium and does not participate in reaction, and the types of the magnetic carrier include but are not limited to magnetite, alnico, ferrite, samarium cobalt, neodymium iron boron and other magnetic materials and variants;
the mixing mode of the magnetic carrier and the sulfur autotrophic denitrification filter filler can be direct particle mixing, bonding granulation with other fillers, high-temperature calcination mixing and the like. Wherein, the grain diameter of the magnetic carrier and the sulphur autotrophic denitrification filter filler in the direct carrier mixing mode is kept consistent, and the preferred grain diameter range is 20-200 meshes.
The volume ratio of the magnetic carrier to the sulfur autotrophic denitrification filter filler is about 1-12: 2, the generated magnetic field strength is not less than 5 mGs.
The invention is realized by relying on a denitrification filter tank, and the denitrification filter tank has the specific structure that: the water tank 1 is connected with a water distribution pipe 5 through a water inlet pipe 2 and a water inlet pump 3, and the water distribution pipe 5 is arranged at the bottom of a denitrification filter 8; the supporting plate 6 is arranged at the upper end of the water distribution pipe 5 in the denitrification filter 8; the water outlet pipe 9 is arranged at the upper end of the denitrification filter 8 and is connected with the circulating water pipe 10, and a water outlet valve 13 is arranged at one end far away from the circulating water pipe 10; the circulating water pump 11 is connected with the water tank 1 and the water outlet pipe 9 through a circulating water pipe 10, which is shown in figure 1. Depending on the denitrification filter device, the technical implementation steps of the invention are as follows:
step (1), mixing magnetic carriers with the same particle size with the original sulfur autotrophic denitrification filter filler according to the ratio of 1-12: 2, or preparing a novel filler by adopting other bonding granulation and high-temperature calcination modes, and then filling the novel filler into a denitrification filter device.
And (2) starting the filter tank in the step (1). The starting mode is to carry out rapid biofilm formation by inoculating sulfur autotrophic denitrifying bacteria liquid from an external source. Adding sulfur autotrophic denitrifying bacteria liquid into a water tank 1, closing a water outlet valve 14, opening a circulating valve 13, a water inlet valve 4, a circulating water pump 11 and a water inlet pump 3 to enable the bacteria liquid in the denitrifying filter tank in the step (2) to be in a circulating flowing state, carrying out carrier film hanging, and controlling the ascending flow rate of the bacteria liquid in the filter tank to be 0.0005-0.0300 m/s and the circulating time to be 4-48 hours.
And (3) closing the circulating valve 13 and the circulating water pump 11, and opening the water inlet valve 4, the water inlet pump 3 and the water outlet valve 14 on the basis of the step (2) to continuously treat the wastewater.
The technology of the invention applies the magnetic effect of an endogenous magnetic field on the thiobacillus denitrificans, and the application mechanism of the magnetic effect of the endogenous magnetic field is completely different from that of an exogenous magnetic field. Under the condition of an endogenous magnetic field, mineral components (for example: S, Fe) of the sulfur autotrophic denitrification filter filling 2+ ) The biological membrane can easily contact with water in an endogenous magnetic medium outside the biological membrane, and the biological membrane is changed into ionized water in the activation process of the energy field, so that the water is instantaneously magnetized, the liquid level flow in the water magnetization process is accelerated, more substance transfer channels are built, and thiobacillus denitrificans donor substances (for example: s) transfer and circulation, enhancementThe enzymatic activity of Thiobacillus denitrificans.
In addition, the endogenous magnetic medium is added, so that the electronic transmission mode among microbial species can be enriched, and the electronic transmission among microbial direct inoculation is promoted. The electron transfer between the microorganisms mediated by the endogenous magnetic medium is realized by the medium-mediated signal molecules without the assistance of energy carriers, so that the extracellular electron transfer efficiency is greatly improved, and the denitrification capability of the thiobacillus denitrificans is improved, which is the key for distinguishing the magnetic effect of the microorganisms in the exogenous magnetic field.
Meanwhile, the filling proportion of the magnetic medium carrier determines the intensity of the generated endogenous magnetic field, and in the filling process, the proper filling proportion is controlled so as to realize that the intensity of the endogenous magnetic field is not less than 5 Gms; the grain size of the magnetic medium carrier determines the homogenization degree of an endogenous magnetic field and the effect of endogenous magnetic action, so the grain sizes of the magnetic medium carrier and the sulfur autotrophic denitrification filter packing are kept consistent, and the homogenization degree of the mixed carrier in the backwashing and mixing processes is realized.
In addition, different from the action of a unidirectional magnetic field of an exogenous magnetic field, the multidirectional magnetic field action of an endogenous magnetic field promotes the multidirectional transfer and movement of paramagnetic substances, enhances the multidirectional adsorption of the paramagnetic substances, improves the proliferation rate of thiobacillus denitrificans, promotes the formation and growth of a biological membrane, and shortens the starting time of the sulfur autotrophic denitrification filter.
Based on the technical scheme, compared with the prior known technology, the method has the following effects:
the activity and the proliferation rate of the sulfur autotrophic denitrifying bacteria are improved through the in-situ magnetic strengthening effect of the endogenous magnetic medium, the denitrification load of the sulfur autotrophic denitrification filter is improved, and the rapid start of the sulfur autotrophic denitrification filter is realized.
The added magnetic medium has low cost, does not participate in reaction, has no secondary pollution, can be repeatedly utilized, and greatly reduces the sewage treatment cost.
The method is simple to operate, safe and economical, is suitable for practical engineering application, and is worthy of wide popularization.
Drawings
FIG. 1 is a schematic structural diagram of a denitrification filter according to the invention.
Notations for reference numerals: 1-water tank, 2-water inlet pipe, 3-water inlet pump, 4-water inlet valve, 5-water distribution pipe, 6-support plate, 7-composite carrier, 8-denitrification filter tank, 9-water outlet pipe, 10-circulating water pipe, 11-circulating water pump, 12-check valve, 13-circulating valve, 14-water outlet valve.
FIG. 2 shows water inlet and outlet NO of example group and control group in example 1 of the present invention 3 - -N concentration and total nitrogen removal.
Detailed Description
Example 1: adding magnetite into sulfur and siderite denitrification filter tank to improve denitrification capacity of system
In the embodiment, natural magnetite is selected as the magnetic carrier in the invention, and sulfur and siderite are selected as the sulfur autotrophic denitrification filter filler in the invention.
Step (1), mixing magnetite particles (with the particle size of 20 meshes) with sulfur (with the particle size of 20 meshes) and siderite (with the particle size of 20 meshes) according to the proportion of 1: 1, and then filled into a denitrification filter device, wherein 2L of magnetite particles, 1.0L of sulphur particles and 1.0L of siderite particles. The magnetic field intensity generated by the composite carrier 7 consisting of magnetite particles, sulfur and siderite mixed particles is 30 mGs.
And (2) starting the filter tank in the step (1). Adding the sulfur autotrophic denitrifying bacteria liquid into the water tank 1, closing the water outlet valve 14, opening the water inlet valve 4, the circulating valve 13, the circulating water pump 11 and the water inlet pump 3, enabling the sulfur autotrophic denitrifying bacteria liquid to flow through the water inlet pipe 2 to enter the water distribution pipe 5 under the lifting action of the water inlet pump 3, and flowing from bottom to top and attaching to the surface of the composite carrier 7. The bacteria liquid in the denitrification filter 8 is in a circular flowing state under the action of a circulating water pump 11, and carrier film formation is carried out. The ascending flow rate of the bacteria liquid in the filter is 0.0030m/s, and the circulation time is 12 hours.
And (3) closing the circulating valve 13 and the circulating water pump 11 on the basis of the step (2), opening the water inlet valve 4, the water inlet pump 3 and the water outlet valve 14, introducing the sewage to be treated into the water tank 1, lifting the sewage by the water inlet pump 3, allowing the sewage to enter the water distribution pipe 5 from the water inlet pipe 2 for uniform water distribution, and allowing the sewage to flow through the surface of the composite carrier 7 from bottom to top and to be uniformly distributed with the surface of the composite carrier 7The grown microorganisms are subjected to denitrification reaction and finally flow out of a water outlet pipe 9 at the top of the filter. Continuously operating for 20 days, and respectively feeding and discharging NO into and from the water of the two systems every day 3 - And (4) detecting the total nitrogen concentration.
And the control group adopts quartz sand as a non-magnetic medium and is added into the filter tank of the mixed filler of sulfur and siderite. Two-system inlet and outlet water NO 3 - The nitrogen removal rates of the example 1 system reached a steady state of 96.58% to 98.10% at reaction day 8, and the nitrogen removal rates of the control system reached a steady state of 71.97% to 86.71% at reaction day 12, as seen in FIG. 2. Compared with a denitrification filter without the magnetic carrier, the nitrogen removal rate of the denitrification filter with the magnetic carrier is improved by 14-34%, and the filter start-up time is shortened by about 1/3.
Example 2: adding magnetite into sulfur and limestone denitrification filter tank to improve denitrification capability of system
In the embodiment, natural magnetite is selected as the magnetic carrier in the invention, and sulfur and limestone are selected as the sulfur autotrophic denitrification filter filler in the invention.
Step (1), mixing magnetite particles (with the particle size of 20 meshes) with sulfur (with the particle size of 20 meshes) and limestone (with the particle size of 20 meshes) according to the proportion of 1: 1, and then filled into a denitrification filter device, wherein 2L of magnetite particles, 1.0L of sulfur particles and 1.0L of limestone particles. The magnetic field strength generated by the composite carrier consisting of magnetite particles, sulfur and limestone mixed particles is 30 mGs.
And (2) starting the filter tank in the step (1). Adding the sulfur autotrophic denitrifying bacteria liquid into the water tank 1, closing the water outlet valve 14, opening the water inlet valve 4, the circulating valve 13, the circulating water pump 11 and the water inlet pump 3, enabling the sulfur autotrophic denitrifying bacteria liquid to flow through the water inlet pipe 2 to enter the water distribution pipe 5 under the lifting action of the water inlet pump 3, and flowing from bottom to top and attaching to the surface of the composite carrier 7. The bacteria liquid in the denitrification filter is in a circular flowing state under the action of a circulating water pump 11, and carrier film formation is carried out. The ascending flow rate of the bacteria liquid in the filter is 0.0030m/s, and the circulation time is 12 hours.
Step (3) on the basis of the step (2),and (3) closing the circulating valve 13 and the circulating water pump 11, opening the water inlet valve 4, the water inlet pump 3 and the water outlet valve 14, introducing sewage to be treated into the water tank 1, lifting the sewage by the water inlet pump 3, allowing the sewage to enter the water distribution pipe 5 from the water inlet pipe 2 for uniform water distribution, allowing the sewage to flow through the surface of the composite carrier 7 from bottom to top, performing denitrification reaction with the growing microorganisms, and finally allowing the sewage to flow out of a water outlet pipe 9 at the top of the filter. Continuously operating for 20 days, and respectively feeding and discharging NO into and from the water of the two systems every day 3 - And (4) detecting the total nitrogen concentration.
And the control group adopts quartz sand as a non-magnetic medium and is added into the sulfur and limestone mixed filler filter tank. Compared with the control group, the nitrogen removal rate of the system of the example 2 is improved by 19 percent, and the start-up time of the filter is shortened by about 1/4 percent.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present invention in further detail, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and are not intended to limit the present invention.
Claims (4)
1. A method for improving the denitrification performance of a sulfur autotrophic denitrification filter is characterized by comprising the following steps: by adding the magnetic carrier into the sulfur autotrophic denitrification filter, the activity and proliferation rate of the sulfur autotrophic denitrification bacteria are improved in situ by utilizing the endogenous magnetic strengthening effect of the magnetic carrier, and the denitrification performance of the filter is improved; the volume ratio of the magnetic carrier to the filler is 1-12: 2, the generated magnetic field strength is not less than 5 mGs.
2. The method for improving the denitrification performance of the sulfur autotrophic denitrification filter according to claim 1, wherein: the magnetic carrier is an inert medium and does not participate in reaction, and the species of the magnetic carrier comprises magnetite, alnico, ferrite, samarium cobalt, neodymium iron boron or the variants of the above substances.
3. The method for improving the denitrification performance of the sulfur autotrophic denitrification filter according to claim 1, wherein: the magnetic carrier and the sulfur autotrophic denitrification filter filler are mixed in a mode of direct particle mixing, or are bonded with other fillers for granulation, or are calcined and mixed with other fillers; wherein, the grain diameter ranges of the magnetic carrier and the sulfur autotrophic denitrification filter filler in the direct carrier mixing mode are both 20-200 meshes.
4. The method for improving the denitrification performance of the sulfur autotrophic denitrification filter according to claim 1, wherein:
the method is realized by relying on a denitrification filter, the denitrification filter is specifically structured in such a way that a water tank is connected with a water distribution pipe through a water inlet pipe and a water inlet pump, and the water distribution pipe is arranged at the bottom of the denitrification filter; the supporting plate is arranged at the upper end of the water distribution pipe in the denitrification filter; the water outlet pipe is arranged at the upper end of the denitrification filter tank and connected with the circulating water pipe, and a water outlet valve is arranged at one end far away from the circulating water pipe; the circulating water pump is connected with the water tank and the water outlet pipe through a circulating water pipe;
the implementation steps are as follows:
step (1), mixing magnetic carriers and fillers with the same particle size according to the ratio of 1-12: 2, mixing and filling the mixture into a denitrification filter device;
starting the filter tank in a manner of inoculating sulfur autotrophic denitrifying bacteria liquid from an external source to form a biofilm; adding sulfur autotrophic denitrifying bacteria liquid into a water tank, closing a water outlet valve, opening a circulating valve, a water inlet valve, a circulating water pump and a water inlet pump to enable the bacteria liquid in the denitrifying filter tank to be in a circulating flowing state, carrying out carrier film hanging, and controlling the rising flow rate of the bacteria liquid in the filter tank to be 0.0005-0.0300 m/s and the circulating time to be 4-48 hours;
and (3) closing the circulating valve and the circulating water pump, and opening the water inlet valve, the water inlet pump and the water outlet valve to continuously treat the wastewater.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116332343A (en) * | 2023-05-22 | 2023-06-27 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
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- 2022-04-13 CN CN202210385078.4A patent/CN114873720A/en active Pending
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| CN110304712A (en) * | 2019-04-12 | 2019-10-08 | 温州创源环境科技有限公司 | Carry sulphur bamboo fibre magnetic suspension filler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116332343A (en) * | 2023-05-22 | 2023-06-27 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
| CN116332343B (en) * | 2023-05-22 | 2023-08-18 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
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