CN115259545A - Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment - Google Patents

Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment Download PDF

Info

Publication number
CN115259545A
CN115259545A CN202210716766.4A CN202210716766A CN115259545A CN 115259545 A CN115259545 A CN 115259545A CN 202210716766 A CN202210716766 A CN 202210716766A CN 115259545 A CN115259545 A CN 115259545A
Authority
CN
China
Prior art keywords
denitrification
layer
nitrogen
sulfur
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210716766.4A
Other languages
Chinese (zh)
Inventor
赵欣园
李婷
黄赫
姚海勇
郭慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Juneng Co ltd
Original Assignee
Zhejiang Juneng Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Juneng Co ltd filed Critical Zhejiang Juneng Co ltd
Priority to CN202210716766.4A priority Critical patent/CN115259545A/en
Publication of CN115259545A publication Critical patent/CN115259545A/en
Pending legal-status Critical Current

Links

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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • 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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to the technical field of sewage treatment equipment, and discloses a sulfur autotrophic denitrification nitrogen and phosphorus removal method and a sulfur autotrophic denitrification phosphorus removal device for tail water treatment, wherein the method comprises the following steps of: 1) The tail water inlet is adjusted to control the concentration of nitrate and nitrogen to be 100-200 mg/L, the concentration of phosphate is 5-10 mg/L; after water distribution, the incoming water sequentially passes through a cobble layer, a quartz sand layer and a sponge iron layer, primary nitrogen and phosphorus removal is carried out through the elemental iron type autotrophic denitrification, and the dissolved oxygen of the incoming water is greatly reduced to form an anoxic environment; 2) The tail water treated in the step 1) enters a composite denitrification filter material layer, the composite denitrification filter material layer is filled with a composite denitrification filter material, and the secondary denitrification and dephosphorization are carried out through sulfur-pyrite autotrophic denitrification; the method and the device realize the deep denitrification of the sulfur-iron composite autotrophic denitrification, can effectively eliminate the dissolved oxygen of the incoming water, can finish the film formation and the start in a shorter period, and can realize the synchronous denitrification and dephosphorization.

Description

Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment.
Background
Under the background of carbon peak and carbon neutralization, each sewage plant faces the problems of water quality upgrading and carbon reduction, wherein total nitrogen removal faces double pressure of organic carbon source cost improvement and carbon emission reduction, so that a denitrification process with low cost and high efficiency is urgently needed. The sulfur autotrophic denitrification is a process that the thiobacillus denitrificans takes sulfur and sulfide as electron donors to reduce nitrate nitrogen and nitrite nitrogen in the wastewater into nitrogen through denitrification so as to realize the denitrification of the wastewater. The process does not need to add an organic carbon source, and has the advantages of large electron donor storage capacity, low cost, low sludge production rate, convenient operation and the like, so the process has obvious cost advantage compared with the traditional denitrification process as tail water advanced treatment.
At present, the autotrophic denitrification process is mainly researched and applied to the deep denitrification treatment of tail water of municipal or industrial sewage plants, and the process adopts a sulfur autotrophic denitrification process with sulfur as an electron donor, and has the following reaction formula: 55S+20CO2+50NO3 -+38H2O+4NH4 +→4C5H7O2N+25N2+55SO4 2-+64H+The application forms are mostly filter tank and fluidized bed biomembrane processes. The tail water is usually from the tail end of a sewage treatment biochemical pool, so that the concentration of dissolved oxygen in the water body is high, the sulfur and other electron donors are easy to oxidize to cause ineffective loss, meanwhile, the dissolved oxygen in the water body also competes for the electron donors with nitrate radicals, and an anoxic environment cannot be quickly formed, so that the start speed of the autotrophic denitrifying bacteria biofilm formation is slow, and the construction period of the process in engineering is limited.
For example, in the invention patent application No. CN201810368904.8 'a modularized sewage nitrogen and phosphorus removal treatment process based on sulfur autotrophic denitrification', pyrite, sulfur and carbonate minerals are used as fillers, synchronous nitrogen and phosphorus removal can be effectively realized, and meanwhile, the carbonate minerals can also form an inorganic carbon source due to corrosion in the process of sulfur autotrophic denitrification. For the application scenario of tail water deep denitrification, the effluent dissolved oxygen is usually higher at the back of the biochemical section, the biochemical effluent dissolved oxygen in the general process can reach 2-4mg/L, the higher dissolved oxygen is easy to cause ineffective consumption of the electron donor, and simultaneously, the dissolved oxygen competes with nitrate for the electron donor, so that the loss of materials is shown as the following formula:
S0+1.5O2+H2O→SO4 2-+H+
3Fe2++2O2→Fe3O4
dissolved oxygen also affects the dissolution of materials such as pyrite and the like, and slows down the starting speed of the device and the process, so the dissolved oxygen is an important limiting factor of the starting speed of the autotrophic denitrification process.
In the patent application No. CN201810368904.8 "a method for treating sewage by synchronously removing nitrogen and phosphorus in the process of enhancing sulfur autotrophic denitrification", protective gas (such as nitrogen, argon and the like) is blown in the device and is covered and sealed, and the optimization method mainly adopts an inert gas blowing-off mode to eliminate dissolved oxygen, form an anoxic environment and enhance the autotrophic denitrification efficiency, but is only suitable for being applied in small-scale tests, and large-scale projects cannot be adopted due to cost reasons.
Therefore, a sulfur autotrophic denitrification nitrogen and phosphorus removal method and a sulfur autotrophic denitrification nitrogen and phosphorus removal device which can be applied to tail water treatment are urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sulfur autotrophic denitrification nitrogen and phosphorus removal method and a sulfur autotrophic denitrification nitrogen and phosphorus removal device for tail water treatment.
In order to achieve the first object, the invention provides the following technical scheme:
a sulfur autotrophic denitrification nitrogen and phosphorus removal method for tail water treatment is characterized by comprising an elemental iron type autotrophic denitrification process and a sulfur-pyrite autotrophic denitrification process, and comprises the following steps:
1) Adjusting the tail water inlet water to control the nitrate nitrogen concentration to be 100-200 mg/L and the phosphate concentration to be 5-10 mg/L; after water distribution, the incoming water sequentially passes through a cobble layer, a quartz sand layer and a sponge iron layer, primary nitrogen and phosphorus removal is carried out through the elemental iron type autotrophic denitrification, and the dissolved oxygen of the incoming water is greatly reduced to form an anoxic environment;
2) And (2) enabling the tail water treated in the step 1) to enter a composite denitrification filter material layer, filling a composite denitrification filter material in the composite denitrification filter material layer, wherein the composite denitrification filter material comprises sulfur, pyrite and limestone, and performing secondary denitrification and dephosphorization through sulfur-pyrite autotrophic denitrification.
Preferably, the mass ratio of the sulfur to the pyrite in the composite denitrification filter material is 2:1 to 5:1, the volume ratio of limestone to the mixture of sulfur and pyrite is 1:1 to 2:1; the particle size of the sulfur and the pyrite is 2-4 mm, and the particle size of the limestone is 2-4 mm.
Preferably, the sponge iron layer consists of sponge iron and gravels, wherein the mass ratio of the sponge iron to the gravels is 1:3 to 2:3, mixing; the particle size of the gravel is 5-10 mm, and the particle size of the sponge iron is 2-4 mm; the height of the sponge iron layer is 5-10 cm, and the porosity is 55%.
Preferably, the particle size of cobblestones in the cobblestone layer is 16-32 mm, and the height of the cobblestone layer is 5-10 cm; the particle size of the quartz sand layer is 2-8 mm, the quartz sand layer is filled from top to bottom in a grading mode from small to large, the height of the cobble layer is 5-10 cm, and the porosity is 40%.
In the process of the simple substance iron type autotrophic denitrification, the traditional autotrophic denitrification filter tank supporting layer material is replaced by sponge iron with an oxygen elimination function, so that dissolved oxygen in incoming water can be effectively eliminated, the formation of an anoxic/anaerobic environment is promoted, the autotrophic denitrification biofilm formation with sulfur/pyrite as an electron donor at the rear end can be quickly started, and the starting can be completed within one week;
and in the process of oxygen eliminationExcept for the easy generation of Fe2+And Fe3+The self-adsorption effect is also achieved, and the phosphorus can react with phosphate of the incoming water to realize deep removal of phosphorus; in the process of biofilm formation, fe type autotrophic flora is formed firstly, then the Fe-S composite autotrophic flora is transited, the running water penetrates through the area, a part of nitrate nitrogen is removed firstly, the load of nitrate nitrogen treatment is reduced preliminarily, and H generated by sulfur+Can also be used as the condition for dissolving out the electron donor of the pyrite material to strengthen the nitrogen and phosphorus removal effect. Simultaneously reducing subsequent sulfate radicals and H+When the nitrate nitrogen of the incoming water fluctuates, the water also has certain shock resistance.
The composite denitrification filter material layer is combined by adopting the composite filter material in the process of the sulfur-pyrite autotrophic denitrification, so that the material cost of independently using sulfur as an electron donor can be reduced, the stacking density and specific gravity of the filter material are increased, and the problems of floating of sulfur filler and the like in the denitrification process are solved; and the alkalinity can be generated in the process of the elemental iron type autotrophic denitrification, the problem of alkalinity consumption caused by the subsequent sulfur-pyrite autotrophic denitrification can be solved, and the consumption of materials such as limestone/dolomite and the like is reduced.
The autotrophic denitrification with sulfur as an electron donor consumes 4.57g of calcium carbonate alkalinity per 1g of nitrate nitrogen removed, while the denitrification with elemental iron generates hydroxyl radicals, and the reaction formula is as follows:
18H2O+6NO3 -+10Fe→N2+10Fe3++36OH-
1g of nitrate nitrogen is converted into about 7.29g of hydroxide radical, the consumption of alkalinity is supplemented, and about 21.5g of alkalinity can be theoretically generated to make up the alkalinity consumed by sulfur autotrophy; the sponge iron contains elementary substance iron and partial ferrous elements, so that the autotrophic denitrification efficiency can be effectively improved.
In order to achieve the second object, the invention provides the following technical scheme:
a sulfur autotrophic denitrification nitrogen and phosphorus removal device for tail water treatment comprises a nitrogen removal device body, wherein the nitrogen removal device body is sequentially divided into a water inlet area, a nitrogen and phosphorus removal area and a water outlet area from bottom to top, a water inlet pipe is arranged in the water inlet area, a water outlet pipe is arranged in the water outlet area, the nitrogen and phosphorus removal area is sequentially provided with a supporting filter plate I, a supporting layer, a composite nitrogen and phosphorus removal filter layer and a supporting filter plate II from the water inlet pipe to the water outlet pipe, and the supporting layer comprises a cobble layer, a quartz sand layer and a sponge iron layer which are sequentially positioned above the supporting filter plate I so as to perform primary nitrogen and phosphorus removal through the supporting layer; and a composite denitrification filter material is filled in the composite denitrification filter material layer and comprises sulfur, pyrite and limestone, so that secondary denitrification and dephosphorization are carried out through the composite denitrification filter material layer.
Preferably, the water inlet pipe is connected with a water distributor to distribute water.
Preferably, a gas-water combined backwashing pipe is arranged in the water inlet area of the denitrification device body, and the gas-water combined backwashing pipe is connected with an external gas-water combined backwashing system to clean the device.
Preferably, a vent pipe is further arranged in the water inlet area of the denitrification device body to empty sewage in the device.
Preferably, the support filter plate I and the support filter plate II are both provided with short-handle filter heads so as to filter the incoming water and the outgoing water.
Preferably, the upper part of the support filter plate II is arranged on an effluent weir, and an effluent pipe is communicated with the inside of the effluent weir.
Preferably, an overflow pipe is arranged in the water outlet area of the denitrification device body and is positioned above the water outlet weir.
Preferably, at least two groups of sampling tubes are arranged in the denitrification and dephosphorization area of the denitrification device body, and the tube openings of the two groups of sampling tubes are respectively positioned at the composite denitrification filter material layer and above the composite denitrification filter material layer.
Preferably, the denitrification device body is also provided with a material loading port and a material port, the material loading port is arranged at the top of the denitrification device body, the material loading port is connected with a material conveying pipe, and the material conveying pipe penetrates through the support filter plate II to supplement the composite denitrification filter material; the material port is positioned above the bearing layer and used for overhauling or replacing the composite denitrification filter material.
Compared with the prior art, the invention has the beneficial effects that:
the nitrogen and phosphorus removal method realizes the deep nitrogen removal of sulfur-iron composite autotrophic denitrification, can effectively eliminate dissolved oxygen of incoming water, can finish film formation and starting in a shorter period, and adopts a bearing layer formed by a cobble layer, a quartz sand layer and a sponge iron layer and a composite nitrogen and phosphorus removal filter material layer to synchronously remove nitrogen and phosphorus from tail water for two times.
Drawings
FIG. 1 is a schematic structural diagram of the sulfur autotrophic denitrification nitrogen and phosphorus removal device.
FIG. 2 is a graph showing the comparative tendency of the film formation start of example 1 and comparative examples 1 to 2.
FIG. 3 is a graph showing the comparison of the phosphorus removal effects of example 1 and comparative examples 1-2.
In the drawings: 1-a water inlet pipe, 2-a water distributor, 3-a gas-water combined backwashing pipe, 4-a blow-down pipe, 5-a short-handle filter head, 6-a support filter plate, 7-a cobble layer, 8-a quartz sand layer, 9-a sponge iron layer, 10-a support layer, 11-a material port, 12-a sampling pipe, 13-a composite denitrification filter material layer, 14-a denitrification device body, 15-a water outlet pipe, 16-a water outlet weir, 17-a material loading port and 18-an overflow pipe.
Detailed Description
The invention provides a sulfur autotrophic denitrification phosphorus and nitrogen removal device for tail water treatment, which comprises a denitrification device body 14, wherein the denitrification device body 14 is sequentially divided into a water inlet area, a denitrification phosphorus and nitrogen removal area and a water outlet area from bottom to top, the water inlet area is internally provided with a water inlet pipe 1, the water outlet area is internally provided with a water outlet pipe 15, incoming water is input through the water inlet pipe 1 at the bottom, and the water inlet pipe 1 is connected with a water distributor 2 so as to distribute the water; the tail water is discharged through a water outlet pipe 15 after being treated;
the denitrification and dephosphorization region is sequentially provided with a supporting filter plate I6, a supporting layer 10, a composite denitrification filter material layer 13 and a supporting filter plate II19 from a water inlet pipe 1 to a water outlet pipe 15, wherein the supporting layer 10 comprises a cobblestone layer 7, a quartz sand layer 8 and a sponge iron layer 9 which are sequentially positioned above the supporting filter plate I6 so as to carry out primary denitrification and dephosphorization through the supporting layer 10; the composite denitrification filter material layer 13 is filled with a composite denitrification filter material which comprises sulfur, pyrite and limestone, so that secondary denitrification and dephosphorization are carried out through the composite denitrification filter material layer 13.
The supporting filter plate I6 and the supporting filter plate II19 are both provided with short-handle filter heads 5 so as to filter the incoming water and the outgoing water; the upper part of the supporting filter plate II19 is arranged on the water outlet weir 16, and the water outlet pipe 15 is communicated with the water outlet weir 16; an overflow pipe 18 is arranged in the water outlet area of the denitrification device body 14, the overflow pipe 18 is positioned above the water outlet weir 16, and the overflow pipe 18 is used for drainage during backwashing and emergency drainage during overload of water.
And an emptying pipe 4 is also arranged in the water inlet area of the denitrification device body 14 so as to empty the sewage in the device.
The denitrification dephosphorization area of the denitrification device body 14 is internally provided with at least two groups of sampling tubes 12, and the tube orifices of the two groups of sampling tubes 12 are respectively positioned at the composite denitrification filter material layer 13 and above the composite denitrification filter material layer 13 so as to detect the treatment condition of the tail water and adjust the dosage of the composite denitrification filter material according to the treatment condition of the tail water.
Tail water to be treated is input through a water inlet pipe 1, distributed through a water distributor 2, subjected to primary water distribution through a short-handle filter head 5 on a supporting filter plate I6, subjected to secondary water distribution through a supporting layer 10, subjected to partial denitrification and dephosphorization at the same time, then flows through a composite denitrification filter material layer 13 to complete deep denitrification and dephosphorization, finally enters a water outlet area through the short-handle filter head 5 on a supporting filter plate II19, and is discharged out of the system through a water outlet weir 16.
A gas-water combined backwashing pipe 3 is arranged in a water inlet area of the denitrification device body 14, and the gas-water combined backwashing pipe 3 is connected with an external gas-water combined backwashing system so as to clean the device.
When the device is blocked, the device is backwashed through a gas-water combined backwashing system; during backwashing, the valve of the water outlet pipe 15 is closed, the tee joint on the overflow pipe 18 is opened at the same time, aeration is firstly carried out, gas washing is started, then water washing is carried out, then steam-water combined backwashing is carried out, and then operation is recovered.
The denitrification device body 14 is also provided with a material loading port 17 and a material port 11, the material loading port 17 is arranged at the top of the denitrification device body 14, the material loading port 17 is connected with a material conveying pipe, and the material conveying pipe penetrates through the support filter plate II19 to supplement the composite denitrification filter material; the material port 11 is positioned above the bearing layer 10 and is used for overhauling or replacing the composite denitrification filter material.
Example 1: the device for removing nitrogen and phosphorus by sulfur autotrophic denitrification for tail water treatment comprises the elemental iron type autotrophic denitrification and sulfur-pyrite autotrophic denitrification, and specifically comprises the following steps:
1) Tail water is fed to control the concentration of nitrate and nitrogen to be 100-200 mg/L, the concentration of phosphate to be 5-10 mg/L and the starting load to be 0.2 g/(Lx d); after water distribution, the incoming water sequentially passes through a cobble layer, a quartz sand layer and a sponge iron layer, primary nitrogen and phosphorus removal is carried out through the elemental iron type autotrophic denitrification, and the dissolved oxygen of the incoming water is greatly reduced to form an anoxic environment;
2) The tail water treated in the step 1) enters a composite denitrification filter layer, a composite denitrification filter material is filled in the composite denitrification filter layer, the composite denitrification filter material comprises sulfur, pyrite and limestone, and secondary denitrification and dephosphorization are carried out through sulfur-pyrite autotrophic denitrification;
wherein, the particle diameter of the cobblestones is 16-32 mm, and the height of the cobblestone layer is 5-10 cm; the grain size of the quartz sand layer is 2-8 mm, and the grain size is filled from top to bottom in a graded manner from small to large until the height is 5-10 cm; the sponge iron layer is 50g, and the sponge iron layer is formed by mixing sponge iron and gravel according to a mass ratio of 1:3 to 2:3, mixing, wherein the particle size of the gravel is 5-10 mm, and the particle size of the sponge iron is 2-4 mm; 150g of sulfur granules with the grain diameter of 2-4 mm, 75g of pyrite with the grain diameter of 2-4 mm, 150g of limestone with the grain diameter of 2-4 mm.
Comparative example 1: it differs from example 1 only in that equal volumes of pure sulphur and limestone are mixed, about 300g sulphur, 5-10 mm particle size, about 170g limestone, 5-10 mm particle size.
Comparative example 2: it differs from comparative example 1 in that: the bearing layer is in a traditional grading mode and comprises a cobble layer, a gravel layer and a quartz sand layer, the cobble layer and the quartz sand layer are the same as those in the embodiment 1, and only the sponge iron layer is replaced by the gravel layer. Meanwhile, pure sulfur and pyrite are adopted in a mass ratio of 1:1, mixing limestone with a mixture of sulfur and pyrite in equal volume, wherein the sulfur is about 150g, the pyrite is 150g, the particle size is 5-10 mm, the limestone is about 170g, and the particle size is 5-10 mm.
According to experimental demonstration, in example 1, the total nitrogen is reduced to 28mg/L in 3d, the total nitrogen removal rate is 72% and the biofilm formation is completed (the total nitrogen removal rate is stabilized to be more than 60%), compared with comparative example 1 (the total nitrogen of effluent is 65mg/L, the total nitrogen removal rate is 35%) and comparative example 2 (the total nitrogen of effluent is 44mg/L, the total nitrogen removal rate is 56%), the starting time is obviously shortened, and the starting speed of the autotrophic denitrification is effectively improved.
Compared with the phosphorus removal effect, the total phosphorus (0.46 mg/L on average) in the effluent of example 1 is obviously lower than that of comparative example 2 (2.51 mg/L on average) and comparative example 1 (6.5 mg/L on average), and the treatment method is proved to be capable of effectively reducing the concentration of the total phosphorus in the effluent and realizing deep phosphorus removal.

Claims (10)

1. A sulfur autotrophic denitrification nitrogen and phosphorus removal method for tail water treatment is characterized by comprising the autotrophic denitrification of elemental iron type and the autotrophic denitrification of sulfur-pyrite, and comprises the following steps:
1) Adjusting the tail water inlet water to control the nitrate nitrogen concentration to be 100-200 mg/L and the phosphate concentration to be 5-10 mg/L; after water distribution, the incoming water sequentially passes through a cobble layer, a quartz sand layer and a sponge iron layer, primary nitrogen and phosphorus removal is carried out through the elemental iron type autotrophic denitrification, and the dissolved oxygen of the incoming water is greatly reduced to form an anoxic environment;
2) And (2) enabling the tail water treated in the step 1) to enter a composite denitrification filter material layer, filling a composite denitrification filter material in the composite denitrification filter material layer, wherein the composite denitrification filter material comprises sulfur, pyrite and limestone, and performing secondary denitrification and dephosphorization through sulfur-pyrite autotrophic denitrification.
2. The sulfur autotrophic denitrification nitrogen and phosphorus removal method for tail water treatment according to claim 1, wherein the mass ratio of sulfur to pyrite in the composite nitrogen removal filter material is 2:1 to 5:1, the volume ratio of limestone to the mixture of sulfur and pyrite is 1:1 to 2:1; the particle size of the sulfur and the pyrite is 2-4 mm, and the particle size of the limestone is 2-4 mm.
3. The sulfur autotrophic denitrification nitrogen and phosphorus removal method for tail water treatment according to claim 1, wherein the sponge iron layer is composed of sponge iron and gravel, wherein the mass ratio of the sponge iron to the gravel is 1:3 to 2:3, mixing; the particle size of the gravel is 5-10 mm, and the particle size of the sponge iron is 2-4 mm; the height of the sponge iron layer is 5-10 cm, and the porosity is 55%.
4. The sulfur autotrophic denitrification nitrogen and phosphorus removal method for tail water treatment according to claim 1, wherein the particle size of the cobbles in the cobble layer is 16-32 mm, and the height of the cobble layer is 5-10 cm; the particle size of the quartz sand layer is 2-8 mm, the quartz sand layer is filled from top to bottom in a grading mode from small to large, the height of the cobble layer is 5-10 cm, and the porosity is 40%.
5. The sulfur autotrophic denitrification nitrogen and phosphorus removal device for tail water treatment comprises a nitrogen removal device body (14), wherein the nitrogen removal device body (14) is sequentially divided into a water inlet area, a nitrogen and phosphorus removal area and a water outlet area from bottom to top, a water inlet pipe (1) is arranged in the water inlet area, and a water outlet pipe (15) is arranged in the water outlet area, and is characterized in that a supporting filter plate I (6), a supporting layer (10), a composite nitrogen and phosphorus removal filter material layer (13) and a supporting filter plate II (19) are sequentially arranged in the nitrogen and phosphorus removal area from the water inlet pipe (1) to the water outlet pipe (15), the supporting layer (10) comprises a cobblestone layer (7), a quartz sand layer (8) and a sponge iron layer (9) which are sequentially positioned above the supporting filter plate I (6), so as to perform primary nitrogen and phosphorus removal through the supporting layer (10); the composite denitrification filter material layer (13) is filled with composite denitrification filter materials, and the composite denitrification filter materials comprise sulfur, pyrite and limestone so as to perform secondary denitrification and dephosphorization through the composite denitrification filter material layer (13).
6. The device for autotrophic nitrogen and phosphorus removal by denitrification of sulfur and used for tail water treatment according to claim 5, wherein the water inlet pipe (1) is connected with a water distributor (2) for distributing water; and a vent pipe (4) is also arranged in the water inlet area of the denitrification device body (14) to drain the sewage in the emptying device.
7. The device for the tail water treatment of the sulfur autotrophic denitrification nitrogen and phosphorus removal according to claim 5, wherein a gas-water combined back flushing pipe (3) is arranged in the water inlet area of the denitrification device body (14), and the gas-water combined back flushing pipe (3) is connected with an external gas-water combined back flushing system to clean the device.
8. The device for the autotrophic sulfur, the denitrification, the phosphorus and the nitrogen removal for the tail water treatment according to claim 5, wherein the supporting filter plates I (6) and II (19) are provided with short-handle filter heads (5) for filtering the incoming water and the outgoing water; an effluent weir (16) is arranged above the supporting filter plate II (19), and an effluent pipe (15) is communicated with the effluent weir (16); an overflow pipe (18) is arranged in the water outlet area of the denitrification device body (14), and the overflow pipe (18) is positioned above the water outlet weir (16).
9. The device of claim 5, wherein at least two sets of sampling tubes (12) are disposed in the denitrification and dephosphorization region of the denitrification device body (14), and the tube openings of the two sets of sampling tubes (12) are respectively located at the composite denitrification filter material layer (13) and above the composite denitrification filter material layer (13).
10. The device for the autotrophic nitrogen and phosphorus removal by sulfur and for the tail water treatment according to any one of claims 5 to 9, wherein the denitrification device body (14) is further provided with a material loading port (17) and a material port (11), the material loading port (17) is arranged at the top of the denitrification device body (14), the material loading port (17) is connected with a material conveying pipe, and the material conveying pipe penetrates through the support filter plate II (19) to supplement the composite denitrification filter material; the material port (11) is positioned above the bearing layer (10) and is used for overhauling or replacing the composite denitrification filter material.
CN202210716766.4A 2022-06-23 2022-06-23 Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment Pending CN115259545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210716766.4A CN115259545A (en) 2022-06-23 2022-06-23 Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210716766.4A CN115259545A (en) 2022-06-23 2022-06-23 Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment

Publications (1)

Publication Number Publication Date
CN115259545A true CN115259545A (en) 2022-11-01

Family

ID=83761893

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210716766.4A Pending CN115259545A (en) 2022-06-23 2022-06-23 Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment

Country Status (1)

Country Link
CN (1) CN115259545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Similar Documents

Publication Publication Date Title
CN101585651B (en) Organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor
CN109694131B (en) Denitrification method and system for landfill leachate
CN103588296A (en) Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen
JP2002166293A (en) Method to remove nitrogen and phosphor simultaneously from waste water
CN111018132B (en) Water treatment device for nitrogen and phosphorus removal and treatment method thereof
CN109368769A (en) A kind of autotrophic type deep-bed filter using novel compound filling
CN103601262A (en) Method for utilizing water supply plant sludge to remove hydrogen sulfide in water by employing adsorption column
CN115259545A (en) Sulfur autotrophic denitrification nitrogen and phosphorus removal method and device for tail water treatment
CN110776219A (en) Advanced treatment device for printing and dyeing wastewater pollutants and application thereof
CN216377818U (en) Acid mine waste water pollutes prosthetic multiunit passive processing apparatus
CN113072191B (en) Iron-reinforced sulfate-removal constructed wetland system and use method and application thereof
CN113321297A (en) Secondary biochemical effluent ferro-sulphur synergistic polyculture denitrification deep denitrification method
CN117164108A (en) Wastewater treatment functional material prepared based on natural wurtzite and natural limonite and application thereof in synchronous denitrification and phosphorus recovery
CN105819617B (en) The biological thickening processing method and biological thickening device of organic chemical waste water with high salt
CN210620363U (en) Autotrophic deep bed filter tank adopting novel composite packing
CN218860452U (en) Sulfur autotrophic denitrification nitrogen and phosphorus removal device for tail water treatment
JP2015077551A (en) Phosphorus elimination-type wastewater treatment process, and phosphorus elimination-type wastewater treatment system
KR100924681B1 (en) Porous sulfur complex media
WO2003093180A1 (en) Biological denitrification apparatus and method using fluidized-bed reactor filled with elemental sulfur
CN215102271U (en) Secondary biochemical effluent ferro-sulphur synergistic polyculture denitrification deep denitrification reactor
RU2225366C2 (en) Transition biological-abiotic waste treatment
CN114735800A (en) In-situ remediation method for biorenewable zero-valent iron-based sulfide underground water
CN210974074U (en) Biochar-based filter bed device for treating acidic heavy metal wastewater
KR20160143199A (en) bilogical nitrogen removal apparatus for treating wastewater
CN113754062B (en) Biomass subsurface flow constructed wetland and application thereof in sewage treatment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination