CN116119885A - Integrated device for deep denitrification of sewage containing ammonia and nitrogen and treatment method thereof - Google Patents

Integrated device for deep denitrification of sewage containing ammonia and nitrogen and treatment method thereof Download PDF

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Publication number
CN116119885A
CN116119885A CN202310313779.1A CN202310313779A CN116119885A CN 116119885 A CN116119885 A CN 116119885A CN 202310313779 A CN202310313779 A CN 202310313779A CN 116119885 A CN116119885 A CN 116119885A
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section
short
denitrification
sewage
cut nitrification
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柴晓利
王鹏程
陆斌
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Tongji University
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Tongji University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to the technical field of sewage treatment, in particular to an integrated device for deep denitrification of sewage containing ammonia nitrogen and a treatment method thereof. The integrated device for deep denitrification of the sewage containing ammonia and nitrogen has the advantages that all reaction sections are closely combined in space, chi Tige is built, head loss is small, and the defects of low denitrification efficiency, poor operation stability, large occupied area and many monomer structures in the sewage treatment process of the traditional biochemical technology are overcome through cooperation of multi-stage and multi-biochemical processes; has the functions of organic oxidation, denitrification, shortcut nitrification and shortcut nitrification-anaerobic ammonia oxidation, and has the advantages of high denitrification efficiency, stable operation, high integration level, small occupied area and the like.

Description

Integrated device for deep denitrification of sewage containing ammonia and nitrogen and treatment method thereof
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an integrated device for deep denitrification of sewage containing ammonia nitrogen and a treatment method thereof.
Background
The traditional sewage biochemical treatment sludge has limited volume load, so that the sewage treatment capacity is limited, the treatment efficiency of the device (equipment) on sewage containing ammonia and nitrogen is low, larger load impact cannot be dealt with, the occupied area is large, and the requirement of high-efficiency biochemical treatment of pollutants cannot be met. Currently, efficient deep denitrification of wastewater containing ammonia and nitrogen is still one of the main problems facing the current needs. Currently, more technologies and devices are used for treating sewage containing ammonia nitrogen, and the technical methods are adopted in various ways. However, the prior art and the device have respective defects that the chemical treatment cannot effectively denitrify the sewage, and the traditional biological treatment device has low treatment efficiency, poor operation stability, low integration level and large occupied area. Therefore, it is imperative to develop integrated, efficient, and integrated processing devices to address the problems faced.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an integrated device for deep denitrification of sewage containing ammonia nitrogen and a treatment method thereof. The integrated device for deep denitrification of the sewage containing ammonia and nitrogen has the advantages that all reaction sections are closely combined in space, chi Tige is built, head loss is small, and the defects of low denitrification efficiency, poor operation stability, large occupied area and many monomer structures in the sewage treatment process of the traditional biochemical technology are overcome through cooperation of multi-stage and multi-biochemical processes; has the functions of organic oxidation, denitrification, shortcut nitrification and shortcut nitrification-anaerobic ammonia oxidation, and has the advantages of high denitrification efficiency, stable operation, high integration level, small occupied area and the like.
The aim of the invention can be achieved by the following technical scheme:
the invention provides an integrated device for deep denitrification of ammonia nitrogen-containing sewage, which is connected with an external ammonia nitrogen-containing sewage water inlet pipe and a mud pipe during use, and has a multi-layer annular structure, and comprises a denitrification section, a short-cut nitrification section, a high-load oxidation section, a short-cut nitrification-anaerobic ammonia oxidation section and a precipitation section from outside to inside;
the denitrification section and the high-load oxidation section are connected with an external ammonia nitrogen-containing sewage inlet pipe; an interstage separator is arranged at the joint of the denitrification section and the short-range nitrification section, a first interstage solid-liquid separation section is arranged at the joint of the short-range nitrification section and the high-load oxidation section, and a second interstage solid-liquid separation section is arranged at the joint of the high-load oxidation section and the denitrification section; the short-cut nitrification-anaerobic ammonia oxidation section is connected with a precipitation section through a water outlet pipe of the biochemical reaction section, and the precipitation section is connected with an external sludge discharge pipe;
the short-cut nitrification section is connected with the denitrification section through a sludge reflux assembly, the first-stage solid-liquid separation section is connected with the denitrification section through a first water outlet reflux assembly, and the precipitation section is connected with the denitrification section through a second water outlet reflux assembly;
wherein, the volume ratio of the denitrification section, the shortcut nitrification-anaerobic ammonia oxidation section and the high-load oxidation section is 1:2 to 4:1.5 to 5:0.5 to 1.5;
the denitrification section is used for removing nitrate nitrogen in the short-cut nitrification section reflux sewage by utilizing organic matters in the external ammonia nitrogen-containing sewage, so that the total nitrogen removal rate is enhanced, the interference of the organic matters on the subsequent biochemical processes such as anaerobic ammonia oxidation and the like is reduced, and the operation stability is enhanced;
the short-cut nitrification section is used for converting ammonia nitrogen into nitrite nitrogen;
the first inter-stage solid-liquid separation section is used for realizing solid-liquid separation of sewage and diverting the sewage to the short-cut nitrification-anaerobic ammonia oxidation section;
the second interstage solid-liquid separation section is used for realizing solid-liquid separation of sewage and dividing the sewage into a denitrification section and a short-cut nitrification-anaerobic ammonia oxidation section;
the high-load oxidation section is used for removing organic matters in the sewage containing the external ammonia nitrogen;
the short-cut nitrification-anaerobic ammonia oxidation section is used for realizing deep denitrification of sewage;
the precipitation section is used for realizing solid-liquid separation and reducing the solid content of the effluent of the integrated device.
In one embodiment of the present invention, the total height of the integrated device is 5 to 8m;
the lower edge of the inter-stage separator is higher than the bottom surface of the integrated device, so that sewage (mud-water mixture) treated by the denitrification section is allowed to pass through the short-cut nitrification section.
In one embodiment of the invention, the volume ratio of the denitrification section and the high-load oxidation section is properly increased when the concentration of nitrate nitrogen and COD in the device water is higher, and the volume ratio of the short-cut nitrification section and the short-cut nitrification-anaerobic ammonia oxidation section is properly increased when the concentration of ammonia nitrogen is higher.
In one embodiment of the invention, the sludge reflux assembly comprises a sludge reflux pump and a sludge reflux pipe, the shortcut nitrification section is connected with the sludge reflux pump, and the sludge reflux pump is connected with the denitrification section through the sludge reflux pipe;
the first water outlet reflux assembly comprises a first water outlet reflux pipe and a first water outlet reflux pump, the first overflow water distribution channel is connected with the first water outlet reflux pump through the first water outlet reflux pipe, and the first water outlet reflux pump is connected with the denitrification section through the first water outlet reflux pipe;
the second water outlet reflux assembly comprises a second water outlet reflux pipe and a second water outlet reflux pump, the water outlet tank is connected with the second water outlet reflux pump through the second water outlet reflux pipe, and the second water outlet reflux pump is connected with the denitrification section through the second water outlet reflux pipe.
In one embodiment of the invention, a stirring device is arranged in the denitrification section;
a stirring device and a first aeration pipe system are arranged in the short-cut nitrification section;
a third aeration pipe system is arranged in the high-load oxidation section;
a first overflow water distribution channel is arranged around the top end of the first inter-stage solid-liquid separation section, a first skid plate is arranged between the first inter-stage solid-liquid separation section and the short-cut nitrification section, and the first skid plate is connected with the high-load oxidation section through a first partition plate;
the top of the second interstage solid-liquid separation section is provided with a second overflow water distribution channel at the periphery, a second sliding plate is arranged between the second interstage solid-liquid separation section and the high-load oxidation section, and the second sliding plate is connected with the denitrification section through a second partition plate.
In one embodiment of the invention, the bottom end of the first skid plate is higher than the bottom surface of the solid-liquid separation section between the first stages, and the top end of the first skid plate is higher than the lower bottom surface of the first overflow distribution channel;
the bottom end of the second skid plate is higher than the bottom surface of the second interstage solid-liquid separation section, and the top end of the second skid plate is higher than the lower bottom surface of the second overflow distribution channel;
the bottom end of the first partition plate is connected with the bottom surface of the solid-liquid separation section between the first stages, and the top end of the first partition plate is higher than the lower bottom surface of the first overflow distribution channel;
the bottom end of the second partition plate is connected with the bottom surface of the second interstage solid-liquid separation section, and the top end of the second partition plate is higher than the lower bottom surface of the second overflow distributing channel;
the included angle between the first sliding plate and the bottom end of the first partition plate is 40-120 degrees;
the included angle between the second sliding plate and the bottom end of the second partition plate is 40-120 degrees.
In one embodiment of the invention, a semicircular gallery baffle, a biological carrier, a second aeration pipe system and a submerged impeller are arranged in the short-cut nitrification-anaerobic ammonia oxidation section, and are connected with the precipitation section through a water outlet pipe of the biochemical reaction zone.
In one embodiment of the invention, the gallery partition board is semicircular and comprises a first gallery partition board and a second gallery partition board, wherein inner arcs of the first gallery partition board and the second gallery partition board are opposite and are concentrically arranged, the radius of the first gallery partition board is 70-85% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section, and the radius of the second gallery partition board is 45-60% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section;
the biological carrier is selected from one of biological ropes, hollow suspended fillers or polyurethane foam; the delivery form of the biological carrier is one of fluidization type or fixed type, and the filling rate is 40-60%.
In one embodiment of the invention, a water outlet channel is arranged at the periphery of the top of the sedimentation section, a steady flow cylinder, a thickener and a sludge collecting bucket are arranged in the sedimentation section, the steady flow cylinder is arranged at the middle position of the sedimentation section in the height direction and is connected with a water outlet pipe of the biochemical reaction zone, the top of the thickener penetrates out of the steady flow cylinder and extends out of the top of the sedimentation section to be connected with an external stirrer, and the sludge collecting bucket is arranged at the bottom of the sedimentation section and is connected with an external sludge discharge pipe.
In one embodiment of the invention, a water distribution port is arranged on the bottom plate of the steady flow cylinder;
the thickener comprises a scraping plate and a rotating shaft, wherein the rotating shaft is connected with the scraping plate, and the top of the rotating shaft penetrates out of the steady flow cylinder and extends out of the top of the sedimentation section to be connected with an external stirrer.
In one embodiment of the invention, a water outlet groove is arranged below one side of the water outlet channel away from the sludge collecting hopper, the distance between the water outlet groove and the top end of the integrated device is 300-900 mm, and the water outlet groove is 200-500 mm lower than the water outlet groove.
The second object of the invention is to provide a treatment method for deep denitrification of sewage containing ammonia nitrogen, which is based on the integrated device for deep denitrification of sewage containing ammonia nitrogen, and specifically comprises the following steps:
(S1) a part of sewage containing ammonia and nitrogen enters a denitrification section, and treated sewage in the denitrification section is obtained after treatment;
(S2) sewage treated in the denitrification section enters a short-cut nitrification section through an interstage partition board, treated sewage in the short-cut nitrification section is obtained, and part of sludge in the short-cut digestion section flows back to the denitrification section;
(S3) a part of sewage treated by the short-cut nitrification stage enters the short-cut nitrification-anaerobic ammonia oxidation stage through the solid-liquid separation stage between the first stages, and the other part of sewage treated by the short-cut nitrification stage flows back to the denitrification stage through the solid-liquid separation stage between the first stages and the first effluent backflow component;
(S4) the other part of sewage containing ammonia and nitrogen enters a high-load oxidation section, and the sewage treated by the high-load oxidation section is obtained after treatment;
(S5) the sewage treated by the high-load oxidation section enters a short-cut nitrification-anaerobic ammonia oxidation section through a second interstage solid-liquid separation section;
(S6) the sewage treated by the high-load oxidation section and the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section are treated by the short-cut nitrification-anaerobic ammonia oxidation section, so that the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section is obtained;
and (S7) treating sewage in the short-cut nitrification-anaerobic ammonia oxidation section, entering a precipitation section to obtain sludge, directly discharging the sludge, and allowing one part of the discharged water of the integrated device to flow back to the denitrification section through a second water outlet backflow component and allowing the other part of the discharged water to be directly discharged.
In one embodiment of the present invention, the surface load of the solid-liquid separation section between the first stages is 0.6 to 2.0m 3 /m 2 /h；
The surface load of the second interstage solid-liquid separation section is 0.3-1.0 m 3 /m 2 /h；
The surface load of the precipitation section is 1.5-2.0 m 3 /m 2 /h；
The dissolved oxygen concentration of the short-cut nitrification section is 0.5-0.8 mg/L;
the dissolved oxygen concentration of the high-load oxidation section is 1.0-2.0 mg/L;
the dissolved oxygen concentration of the short-cut nitrification-anaerobic ammonia oxidation section is 0.1-0.3 mg/L.
In one embodiment of the present invention, the stirring rotation speed of the stirring device is set to be 50-500 r/min; the volume load of the integrated device is 1.0-5.0 kg BOD when denitrification-short-cut nitrification-anaerobic ammonia oxidation biological denitrification is carried out 5 /m 3 /d; the plug flow velocity of the submersible plug flow device is 0.2-0.5 m/s.
In one embodiment of the invention, the reflux amount of the sewage treated by the short-cut nitrification section accounts for 30% -70% of the sewage treated by the short-cut nitrification section; the reflux quantity of the water discharged by the integrated device accounts for 20% -70% of the water discharged by the integrated device.
Compared with the prior art, the invention has the following beneficial effects:
(1) The integrated device for deep denitrification of the sewage containing ammonia and nitrogen adopts a multi-biochemical process coupling technology of organic oxidation-denitrification-short-cut nitrification-anaerobic ammonia oxidation, and has the advantages of high volume load, high denitrification efficiency and strong ammonia nitrogen impact load resistance.
(2) The integrated device for deep denitrification of the sewage containing ammonia nitrogen has a denitrification section for enhancing the removal of nitrate nitrogen and organic matters, so that on one hand, the removal of nitrate nitrogen is enhanced, the total nitrogen removal rate is improved, on the other hand, the interference of the organic matters on the subsequent biochemical processes such as anaerobic ammonia oxidation and the like is reduced, and the operation stability is enhanced.
(3) The integrated device for deep denitrification of the sewage containing ammonia and nitrogen has a high-load oxidation section for treating part of raw water of the inlet water to remove organic matters in the sewage, provides the sewage containing the ammonia and nitrogen which does not contain the organic matters basically for supplementing the requirement of the subsequent process for ammonia nitrogen, and avoids the interference of the organic matters.
(4) The integrated device for deep denitrification of the sewage containing ammonia and nitrogen adopts a short-cut nitrification-anaerobic ammonia oxidation process with short-cut nitrification sections connected in series, namely, the coupling of a one-stage anaerobic ammonia oxidation process and a two-stage anaerobic ammonia oxidation process, provides sufficient and proper-proportion reaction substrates for the anaerobic ammonia oxidation process in the device through multistage water transfer, dissolved oxygen control and the like, and further obtains stable and efficient denitrification efficiency.
(5) The integrated device for deep denitrification of the sewage containing ammonia and nitrogen has the advantages of small occupied area, high integration level, regular equipment appearance, high space utilization rate, and convenience in overhaul, and the motors participating in the reaction are positioned outside the device. The device integrates biochemistry and secondary sedimentation, realizes the tight combination of the reaction tanks in a three-dimensional space, and remarkably improves the sewage treatment capacity per unit volume compared with the traditional process.
Drawings
FIG. 1 is a top cross-sectional view of an integrated apparatus for deep denitrification of ammonia nitrogen containing wastewater provided by the invention;
FIG. 2 is a schematic view of the process of an integrated device for deep denitrification of ammonia nitrogen containing wastewater according to the present invention;
reference numerals in the drawings: 10. a denitrification section; 20. a short-cut nitrification section; 30. a short-cut nitrification-anaerobic ammonia oxidation section; 40. a first-stage solid-liquid separation section; 50. a second interstage solid-liquid separation section; 60. a precipitation section; 70. a stirring device; 80. the first water outlet reflux assembly; 90. the second water outlet reflux assembly; 100. a high load oxidation section; 11. an interstage separator; 21. a first aeration piping; 22. a sludge reflux pump; 31. gallery partitions; 32. submersible flow impeller; 33. a second aeration piping; 34. a biological carrier; 35. a water outlet pipe of the biochemical reaction zone; 41. a first overflow distribution channel; 42. a first slip sheet; 43. a first partition plate; 51. a second overflow distribution channel; 52. a second skid plate; 53. a second partition plate; 61. a mud collecting hopper; 62. a water outlet channel; 63. a water outlet tank; 64. a mud pipe; 65. a steady flow cylinder; 66. a water distribution port; 67. a cartridge floor; 68. a thickener; 81. a first effluent return pump; 91. a second outlet water reflux pump; 101. and a third aeration pipe system.
Detailed Description
The invention provides an integrated device for deep denitrification of ammonia nitrogen-containing sewage, which is connected with an external ammonia nitrogen-containing sewage water inlet pipe and a sludge discharge pipe when in use, the device is of a multi-layer annular structure and comprises a denitrification section, a short-cut nitrification section, a high-load oxidation section, a short-cut nitrification-anaerobic ammonia oxidation section and a sedimentation section from outside to inside,
the denitrification section and the high-load oxidation section are connected with an external ammonia nitrogen-containing sewage inlet pipe; an interstage separator is arranged at the joint of the denitrification section and the short-range nitrification section, a first interstage solid-liquid separation section is arranged at the joint of the short-range nitrification section and the high-load oxidation section, and a second interstage solid-liquid separation section is arranged at the joint of the high-load oxidation section and the denitrification section; the short-cut nitrification-anaerobic ammonia oxidation section is connected with a precipitation section through a water outlet pipe of the biochemical reaction section, and the precipitation section is connected with an external sludge discharge pipe;
the short-cut nitrification section is connected with the denitrification section through a sludge reflux assembly, the first-stage solid-liquid separation section is connected with the denitrification section through a first water outlet reflux assembly, and the precipitation section is connected with the denitrification section through a second water outlet reflux assembly;
wherein, the volume ratio of the denitrification section, the shortcut nitrification-anaerobic ammonia oxidation section and the high-load oxidation section is 1:2 to 4:1.5 to 5:0.5 to 1.5;
the denitrification section is used for removing nitrate nitrogen in the short-cut nitrification section reflux sewage by utilizing organic matters in the external ammonia nitrogen-containing sewage, so that the total nitrogen removal rate is enhanced, the interference of the organic matters on the subsequent biochemical processes such as anaerobic ammonia oxidation and the like is reduced, and the operation stability is enhanced;
the short-cut nitrification section is used for converting ammonia nitrogen into nitrite nitrogen;
the first inter-stage solid-liquid separation section is used for realizing solid-liquid separation of sewage and diverting the sewage to the short-cut nitrification-anaerobic ammonia oxidation section;
the second interstage solid-liquid separation section is used for realizing solid-liquid separation of sewage and dividing the sewage into a denitrification section and a short-cut nitrification-anaerobic ammonia oxidation section;
the high-load oxidation section is used for removing organic matters in the sewage containing the external ammonia nitrogen;
the short-cut nitrification-anaerobic ammonia oxidation section is used for realizing deep denitrification of sewage;
the precipitation section is used for realizing solid-liquid separation and reducing the solid content of the effluent of the integrated device.
In one embodiment of the present invention, the total height of the integrated device is 5 to 8m;
the lower edge of the interstage partition plate is higher than the bottom surface of the integrated device, and a plurality of overflow holes which allow the sewage treated by the denitrification section to flow through the sewage containing ammonia and nitrogen (mud-water mixture) pass through and enter the short-range nitrification section.
In one embodiment of the invention, the volume ratio of the denitrification section and the high-load oxidation section is properly increased when the concentration of nitrate nitrogen and COD in the device water is higher, and the volume ratio of the short-cut nitrification section and the short-cut nitrification-anaerobic ammonia oxidation section is properly increased when the concentration of ammonia nitrogen is higher.
In one embodiment of the invention, the sludge reflux assembly comprises a sludge reflux pump and a sludge reflux pipe, the shortcut nitrification section is connected with the sludge reflux pump, and the sludge reflux pump is connected with the denitrification section through the sludge reflux pipe;
the first water outlet reflux assembly comprises a first water outlet reflux pipe and a first water outlet reflux pump, the first overflow water distribution channel is connected with the first water outlet reflux pump through the first water outlet reflux pipe, and the first water outlet reflux pump is connected with the denitrification section through the first water outlet reflux pipe;
the second water outlet reflux assembly comprises a second water outlet reflux pipe and a second water outlet reflux pump, the water outlet tank is connected with the second water outlet reflux pump through the second water outlet reflux pipe, and the second water outlet reflux pump is connected with the denitrification section through the second water outlet reflux pipe.
In one embodiment of the invention, a stirring device is arranged in the denitrification section;
a stirring device and a first aeration pipe system are arranged in the short-cut nitrification section;
a third aeration pipe system is arranged in the high-load oxidation section;
a first overflow water distribution channel is arranged around the top end of the first inter-stage solid-liquid separation section, a first skid plate is arranged between the first inter-stage solid-liquid separation section and the short-cut nitrification section, and the first skid plate is connected with the high-load oxidation section through a first partition plate;
the top of the second interstage solid-liquid separation section is provided with a second overflow water distribution channel at the periphery, a second sliding plate is arranged between the second interstage solid-liquid separation section and the high-load oxidation section, and the second sliding plate is connected with the denitrification section through a second partition plate.
In one embodiment of the invention, the bottom end of the first skid plate is higher than the bottom surface of the solid-liquid separation section between the first stages, and the top end of the first skid plate is higher than the lower bottom surface of the first overflow distribution channel;
the bottom end of the second skid plate is higher than the bottom surface of the second interstage solid-liquid separation section, and the top end of the second skid plate is higher than the lower bottom surface of the second overflow distribution channel;
the bottom end of the first partition plate is connected with the bottom surface of the solid-liquid separation section between the first stages, and the top end of the first partition plate is higher than the lower bottom surface of the first overflow distribution channel;
the bottom end of the second partition plate is connected with the bottom surface of the second interstage solid-liquid separation section, and the top end of the second partition plate is higher than the lower bottom surface of the second overflow distributing channel;
the included angle between the first sliding plate and the bottom end of the first partition plate is 40-120 degrees;
the included angle between the second sliding plate and the bottom end of the second partition plate is 40-120 degrees.
In one embodiment of the invention, a semicircular gallery baffle, a biological carrier, a second aeration pipe system and a submerged impeller are arranged in the short-cut nitrification-anaerobic ammonia oxidation section, and are connected with the precipitation section through a water outlet pipe of the biochemical reaction zone.
In one embodiment of the invention, the gallery partition board is semicircular and comprises a first gallery partition board and a second gallery partition board, wherein inner arcs of the first gallery partition board and the second gallery partition board are opposite and are concentrically arranged, the radius of the first gallery partition board is 70-85% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section, and the radius of the second gallery partition board is 45-60% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section;
the biological carrier is selected from one of biological ropes, hollow suspended fillers or polyurethane foam; the delivery form of the biological carrier is one of fluidization type or fixed type, and the filling rate is 40-60%.
In one embodiment of the invention, a water outlet channel is arranged at the periphery of the top of the sedimentation section, a steady flow cylinder, a thickener and a sludge collecting bucket are arranged in the sedimentation section, the steady flow cylinder is arranged at the middle position of the sedimentation section in the height direction and is connected with a water outlet pipe of the biochemical reaction zone, the top of the thickener penetrates out of the steady flow cylinder and extends out of the top of the sedimentation section to be connected with an external stirrer, and the sludge collecting bucket is arranged at the bottom of the sedimentation section and is connected with an external sludge discharge pipe.
In one embodiment of the invention, a water distribution port is arranged on the bottom plate of the steady flow cylinder;
the thickener comprises a scraping plate and a rotating shaft, wherein the rotating shaft is connected with the scraping plate, and the top of the rotating shaft penetrates out of the steady flow cylinder and extends out of the top of the sedimentation section to be connected with an external stirrer.
In one embodiment of the invention, a water outlet groove is arranged below one side of the water outlet channel away from the sludge collecting hopper, the distance between the water outlet groove and the top end of the integrated device is 300-900 mm, and the water outlet groove is 200-500 mm lower than the water outlet groove.
The invention provides a treatment method for deep denitrification of ammonia nitrogen-containing sewage, which is based on the integrated device for deep denitrification of ammonia nitrogen-containing sewage, and specifically comprises the following steps:
(S1) a part of sewage containing ammonia and nitrogen enters a denitrification section, and treated sewage in the denitrification section is obtained after treatment;
(S2) sewage treated in the denitrification section enters a short-cut nitrification section through an interstage partition board, treated sewage in the short-cut nitrification section is obtained, and part of sludge in the short-cut digestion section flows back to the denitrification section;
(S3) a part of sewage treated by the short-cut nitrification stage enters the short-cut nitrification anaerobic ammonia oxidation stage through the solid-liquid separation stage between the first stages, and the other part of sewage treated by the short-cut nitrification stage flows back to the denitrification stage through the solid-liquid separation stage between the first stages and the first effluent backflow component;
(S4) the other part of sewage containing ammonia and nitrogen enters a high-load oxidation section, and the sewage treated by the high-load oxidation section is obtained after treatment;
(S5) the sewage treated by the high-load oxidation section enters a short-cut nitrification-anaerobic ammonia oxidation section through a second interstage solid-liquid separation section;
(S6) the sewage treated by the high-load oxidation section and the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section are treated by the short-cut nitrification-anaerobic ammonia oxidation section, so that the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section is obtained;
and (S7) treating sewage in the short-cut nitrification-anaerobic ammonia oxidation section, entering a precipitation section to obtain sludge, directly discharging the sludge, and allowing one part of the discharged water of the integrated device to flow back to the denitrification section through a second water outlet backflow component and allowing the other part of the discharged water to be directly discharged.
In one embodiment of the present invention, the surface load of the solid-liquid separation section between the first stages is 0.6 to 2.0m 3 /m 2 /h；
The surface load of the second interstage solid-liquid separation section is 0.3-1.0 m 3 /m 2 /h；
The surface load of the precipitation section is 1.5-2.0 m 3 /m 2 /h；
The dissolved oxygen concentration of the short-cut nitrification section is 0.5-0.8 mg/L;
the dissolved oxygen concentration of the high-load oxidation section is 1.0-2.0 mg/L;
the dissolved oxygen concentration of the short-cut nitrification-anaerobic ammonia oxidation section is 0.1-0.3 mg/L.
In one embodiment of the present invention, the stirring rotation speed of the stirring device is set to be 50-500 r/min; the volume load of the integrated device is 1.0-5.0 kg BOD when denitrification-short-cut nitrification-anaerobic ammonia oxidation biological denitrification is carried out 5 /m 3 /d; the plug flow velocity of the submersible plug flow device is 0.2-0.5 m/s.
In one embodiment of the invention, the reflux amount of the sewage treated by the high-load oxidation section accounts for 30% -70% of the sewage treated by the high-load oxidation section; the reflux quantity of the water discharged by the integrated device accounts for 20% -70% of the water discharged by the integrated device.
The invention will now be described in detail with reference to the drawings and specific examples.
The following embodiments are merely specific examples of the type, size (diameter), and specifications of related devices and other parameters of the integrated devices; the method can be adjusted according to the water quality and the water quantity of the high ammonia nitrogen sewage to be treated in practical application.
In the examples below, unless otherwise indicated, all materials used were commercially available, and all means and methods used were conventional in the art.
Example 1
The embodiment provides an integrated device for deep denitrification of ammonia nitrogen-containing sewage.
As shown in fig. 1 and 2, an integrated apparatus for deep denitrification of wastewater containing ammonia nitrogen has a multi-layered annular structure, which comprises a central cylindrical precipitation section 60, a short-cut nitrification-anaerobic ammonia oxidation section 30 surrounding the precipitation section 60, a denitrification section 10 surrounding the short-cut nitrification-anaerobic ammonia oxidation section 30, a short-cut nitrification section 20, and a high-load oxidation section 100;
the total height of the integrated device is 6m, and the volume ratio of the denitrification section 10, the shortcut nitrification section 20, the shortcut nitrification-anaerobic ammonia oxidation section 30 and the high-load oxidation section 100 is 1:4:2:1, a step of;
a stirring device 70 is arranged in the denitrification section 10 and is connected with the short-cut nitrification section 20 through an interstage separator 11; the lower edge of the inter-stage baffle 11 is higher than the bottom surface of the integrated device, and a plurality of overflow holes which allow the sewage treated by the denitrification section to flow through the sewage containing ammonia and nitrogen (mud-water mixture) pass through and enter the short-cut nitrification section 20; the short-cut nitrification section 20 is internally provided with a stirring device 70 and a first aeration pipe system 21 and is connected with the denitrification section 10 through a sludge reflux assembly, wherein the sludge reflux assembly comprises a sludge reflux pipe and a sludge reflux pump 22, the short-cut nitrification section 20 is connected with the sludge reflux pump 22, and the sludge reflux pump 22 is connected with the denitrification section 10 through the sludge reflux pipe; a third aeration pipe system 101 is arranged in the high-load oxidation section 100, a first inter-stage solid-liquid separation section 40 is arranged between the short-cut nitrification section 20 and the high-load oxidation section 100, a first overflow water distribution channel 41 is arranged around the top end of the first inter-stage solid-liquid separation section 40, a first sliding plate 42 is arranged between the first inter-stage solid-liquid separation section 40 and the short-cut nitrification section 20, the first sliding plate 42 is connected with the high-load oxidation section 100 through a first partition plate 43, the bottom end of the first sliding plate 42 is higher than the bottom surface of the first inter-stage solid-liquid separation section 40, the top end of the first sliding plate 42 is higher than the lower bottom surface of the first overflow water distribution channel 41, the bottom end of the first partition plate 43 is connected with the bottom surface of the first inter-stage solid-liquid separation section 40, and the top end of the first sliding plate 42 forms an included angle of 80 degrees with the bottom end of the first partition plate 43; a second interstage solid-liquid separation section 50 is arranged between the high-load oxidation section 100 and the denitrification section 10, a second overflow water distribution channel 51 is arranged around the top end of the second interstage solid-liquid separation section 50, a second skid plate 52 is arranged between the second interstage solid-liquid separation section 50 and the high-load oxidation section 100, and the second skid plate 52 is connected with the denitrification section 10 through a second partition plate 53; the bottom end of the second skid plate 52 is higher than the bottom surface of the second inter-stage solid-liquid separation section 50, and the top end is higher than the lower bottom surface of the second overflow distributing channel 51; the bottom end of the second partition plate 53 is connected with the bottom surface of the second interstage solid-liquid separation section 50, and the top end is higher than the lower bottom surface of the second overflow distributing channel 51; the lower bottom surface of the second overflow distribution channel 51 is lower than the lower bottom surface of the first overflow distribution channel 41; the included angle between the second sliding plate 52 and the bottom end of the second partition plate 53 is 80 degrees; the first overflow distribution canal 51 is further connected with the denitrification section 10 through a first water outlet reflux assembly (80), the first water outlet reflux assembly 80 comprises a first water outlet reflux pipe and a first water outlet reflux pump 81, the first overflow distribution canal 51 is connected with the first water outlet reflux pump 81 through the first water outlet reflux pipe, and the first water outlet reflux pump 81 is connected with the denitrification section 10 through the first water outlet reflux pipe.
A semicircular gallery baffle 31, a biological carrier 34, a second aeration pipe system 33 and a submerged impeller 32 are arranged in the short-cut nitrification-anaerobic ammonia oxidation section 30, and are connected with a precipitation section 60 through a water outlet pipe 35 of a biochemical reaction zone; the gallery baffle 31 is semicircular and comprises a first gallery baffle and a second gallery baffle, wherein inner arcs of the first gallery baffle and the second gallery baffle are opposite and concentrically arranged, the radius of the first gallery baffle is 70% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section 30, and the radius of the second gallery baffle is 50% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section 30; the biological carrier 34 is a biological rope, the throwing form is fixed, and the filling rate is 40%; the short-cut nitrification-anaerobic ammonia oxidation section 30 is connected with the precipitation section 60 through a water outlet pipe 35 of the biochemical reaction zone.
The periphery of the top of the sedimentation section 60 is provided with a water outlet channel 62, a water outlet channel 63 is arranged below one side of the water outlet channel 62 away from the sludge hopper 61, the distance between the water outlet channel 62 and the top end of the integrated device is 900mm, and the water outlet channel 63 is 300mm lower than the water outlet channel 62; the sedimentation section 60 is internally provided with a steady flow cylinder 65, a thickener 68 and a sludge collecting hopper 61, the steady flow cylinder 65 is arranged at the middle position of the sedimentation section 60 in the height direction and is connected with the water outlet pipe 35 of the biochemical reaction zone, the bottom plate of the steady flow cylinder 65 is a cylinder bottom plate 67, and the cylinder bottom plate 67 is provided with a water distribution port 66; the thickener 68 comprises a scraper and a rotating shaft, the rotating shaft is connected with the scraper, the top of the rotating shaft penetrates out of the steady flow cylinder 65 and extends out of the top end of the sedimentation section 60 to be connected with an external stirrer; the sludge hopper 61 is arranged at the bottom of the sedimentation section 60 and is connected with an external sludge discharge pipe 64; the water outlet tank 63 is connected with the denitrification section 10 through a second water outlet reflux component 90 to remove nitrate nitrogen generated in the anaerobic ammoxidation process, so as to strengthen the total nitrogen removal rate; the second water outlet reflux assembly 90 comprises a second water outlet reflux pipe and a second water outlet reflux pump 91, the water outlet tank 63 is connected with the second water outlet reflux pump 91 through the second water outlet reflux pipe, and the second water outlet reflux pump 91 is connected with the denitrification section 10 through the second water outlet reflux pipe.
The denitrification section 10 is used for removing nitrate nitrogen in the sewage returned by the short-cut nitrification section 20 by utilizing organic matters in the external ammonia nitrogen-containing sewage, so that the total nitrogen removal rate is enhanced, the interference of the organic matters on the subsequent biochemical processes such as anaerobic ammonia oxidation and the like is reduced, and the operation stability is enhanced;
the short-range nitrification stage 20 is used for partially converting ammonia nitrogen into nitrite nitrogen;
the first inter-stage solid-liquid separation section 40 is used for realizing solid-liquid separation of sewage and diverting the sewage to the short-cut nitrification-anaerobic ammonia oxidation section 30;
the second interstage solid-liquid separation section 50 is used for realizing solid-liquid separation of sewage and diverting the sewage to the denitrification section 10 and the short-cut nitrification-anaerobic ammonia oxidation section 30;
the high-load oxidation section 100 is used for removing organic matters in the sewage containing the external ammonia nitrogen;
the short-cut nitrification-anaerobic ammonia oxidation section 30 is used for realizing the deep denitrification of sewage;
the precipitation section 60 is used for realizing solid-liquid separation and reducing the solid content of the effluent of the integrated device.
Example 2
The embodiment provides a treatment method for deep denitrification of high ammonia nitrogen sewage, which is based on the integrated device of embodiment 1, and specifically comprises the following steps:
(S1) a part of sewage containing ammonia nitrogen enters a denitrification section 10 to remove the nitrate nitrogen and consume organic matters in the sewage containing high ammonia nitrogen (on one hand, the removal of the nitrate nitrogen is enhanced, on the other hand, the interference of the organic matters on the subsequent biochemical processes such as anaerobic ammoxidation and the like is reduced, and the operation stability is enhanced), so that the sewage treated by the denitrification section is obtained;
wherein the rotation speed of the stirring device 70 in the denitrification section 10 is 200r/min;
(S2) the sewage treated by the denitrification section enters a short-cut nitrification section 20 through an inter-stage baffle 11, ammonia nitrogen is partially converted into nitrite nitrogen to obtain sewage treated by the short-cut nitrification section, and partial sludge of the short-cut nitrification section flows back to the denitrification section 10;
wherein the rotation speed of the stirring device 70 in the short-cut nitrification section 20 is 200r/min, and the concentration of dissolved oxygen is 0.5-0.8 mg/L;
(S3) a part of sewage treated by the short-cut nitrification stage enters the short-cut nitrification anaerobic ammonia oxidation stage 30 through the first inter-stage solid-liquid separation stage 40, and the other part of sewage treated by the short-cut nitrification stage flows back to the denitrification stage 10 through the first inter-stage solid-liquid separation stage 40;
wherein the surface load of the first inter-stage solid-liquid separation section 40 is 2.0m 3 /m 2 /h; the reflux amount of sewage treated by the short-cut nitrification section is 40% of that of sewage treated by the short-cut nitrification section;
(S4) the other part of the sewage containing ammonia nitrogen enters a high-load oxidation section 100, and organic matters in the sewage containing ammonia nitrogen are removed to obtain high-load oxidation section treated sewage;
wherein the dissolved oxygen concentration of the high-load oxidation section 100 is 1.5mg/L;
(S5) the sewage treated by the high-load oxidation section enters the short-cut nitrification-anaerobic ammonia oxidation section 30 through the second interstage solid-liquid separation section 50 so as to supplement ammonia nitrogen and adjust the ammonia nitrogen/nitrite nitrogen ratio;
wherein the surface load of the second interstage solid-liquid separation section 50 is 0.5m 3 /m 2 And/h, the plug flow velocity of the submerged plug flow device 32 in the short-cut nitrification-anaerobic ammonia oxidation section 50 is 0.2m/s; the dissolved oxygen concentration in the short-cut nitrification section 20 is 0.5-0.8 mg/L,
(S6) the short-cut nitrification-anaerobic ammonia oxidation section 30 is used for treating the sewage treated by the high-load oxidation section and the sewage treated by the short-cut nitrification section, so that ammonia nitrogen and nitrite nitrogen are synchronously removed, and the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section is obtained;
wherein the dissolved oxygen concentration of the short-cut nitrification-anaerobic ammonia oxidation section 30 is 0.1-0.3 mg/L;
(S7) the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section enters a precipitation section 60 to obtain sludge and integrated device effluent, wherein the sludge is directly discharged, one part of the integrated device effluent flows back to a denitrification section 10 (the nitrate nitrogen byproducts generated by anaerobic ammonia oxidation are removed by utilizing organic matters in the sewage containing ammonia nitrogen, so that the total nitrogen removal rate of the integrated device is enhanced), and the other part of the integrated device effluent is directly discharged;
wherein the surface load of the precipitation section 60 is 1.5m 3 /m 2 /h; the reflux quantity of the water discharged by the integrating device is 50% of the water discharged by the integrating device; the volume load of the integrated device for denitrification-short-cut nitrification-anaerobic ammonia oxidation biological denitrification is 3.0kg BOD 5 /m 3 /d。
Example 3
In this example, compared with example 1, the volume ratio of the "denitrification section 10, shortcut nitrification section 20, shortcut nitrification-anaerobic ammonia oxidation section 30, and high-load oxidation section 100" is 1:4:3:1.5, the surface loads of the first stage solid-liquid separation stage 40 and the second stage solid-liquid separation stage 50 were 2.0m, respectively 3 /m 2 /h and 1.0m 3 /m 2 And/h, the volume load of the integrated device for denitrification-short-cut nitrification-anaerobic ammonia oxidation biological denitrification is 4.0kg BOD 5 /m 3 And/d, the installation angle between the first sliding plate 42 and the first partition plate 43, the installation angle between the second sliding plate 52 and the installation angle between the second partition plate 53 are 70 degrees, the plug flow velocity of the submersible plug 32 is 0.4m/s, the biological carrier 34 is hollow suspended filler, the filling rate is 50%, and the carrier throwing form is fluidization type, and all the other steps are the same as those of the embodiment 1.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the explanation of the present invention, should make improvements and modifications without departing from the scope of the present invention.

Claims (10)

1. The integrated device for deep denitrification of the sewage containing ammonia and nitrogen is connected with an external sewage containing ammonia and nitrogen water inlet pipe and a sludge discharge pipe (64) during use, and is characterized in that the device is of a multi-layer annular structure and comprises a denitrification section (10), a short-cut nitrification section (20) and a high-load oxidation section (100), a short-cut nitrification-anaerobic ammonia oxidation section (30) and a precipitation section (60) from outside to inside;
the denitrification section (10) and the high-load oxidation section (100) are connected with an external ammonia nitrogen-containing sewage inlet pipe; an interstage separator (11) is arranged at the joint of the denitrification section (10) and the short-range nitrification section (20), a first interstage solid-liquid separation section (40) is arranged at the joint of the short-range nitrification section (20) and the high-load oxidation section (100), and a second interstage solid-liquid separation section (50) is arranged at the joint of the high-load oxidation section (100) and the denitrification section (10); the short-cut nitrification-anaerobic ammonia oxidation section (30) is connected with the precipitation section (60) through a water outlet pipe (35) of the biochemical reaction zone, and the precipitation section (60) is connected with an external sludge discharge pipe (64);
the short-cut nitrification section (20) is connected with the denitrification section (10) through a sludge backflow component, the first-stage solid-liquid separation section (40) is connected with the denitrification section (10) through a first effluent backflow component (80), and the precipitation section (60) is connected with the denitrification section (10) through a second effluent backflow component (90);
wherein, the volume ratio of the denitrification section (10), the short-cut nitrification section (20), the short-cut nitrification-anaerobic ammonia oxidation section (30) and the high-load oxidation section (100) is 1:2 to 4:1.5 to 5:0.5 to 1.5.
2. The integrated device for deep denitrification of ammonia nitrogen containing wastewater according to claim 1, wherein a stirring device (70) is arranged in the denitrification section (10);
a stirring device (70) and a first aeration pipe system (21) are arranged in the short-cut nitrification section (20);
a third aeration pipe system (101) is arranged in the high-load oxidation section (100);
a first overflow water distribution channel (41) is arranged around the top end of the first inter-stage solid-liquid separation section (40), a first skid plate (42) is arranged between the first inter-stage solid-liquid separation section (40) and the short-range nitration section (20), and the first skid plate is connected with the high-load oxidation section (100) through a first partition baffle plate (43);
the top of the second interstage solid-liquid separation section (50) is provided with a second overflow water distribution channel (51) at the periphery, a second skid plate (52) is arranged between the second interstage solid-liquid separation section (50) and the high-load oxidation section (100), and the second skid plate is connected with the denitrification section (10) through a second partition plate (53).
3. An integrated device for deep denitrification of wastewater containing ammonia and nitrogen according to claim 2, wherein the bottom end of the first skid plate (42) is higher than the bottom surface of the first inter-stage solid-liquid separation section (40), and the top end is higher than the lower bottom surface of the first overflow distribution channel (41);
the bottom end of the second skid plate (52) is higher than the bottom surface of the second inter-stage solid-liquid separation section (50), and the top end of the second skid plate is higher than the lower bottom surface of the second overflow distributing channel (51);
the bottom end of the first partition plate (43) is connected with the bottom surface of the first inter-stage solid-liquid separation section (40), and the top end of the first partition plate is higher than the lower bottom surface of the first overflow distribution channel (41);
the bottom end of the second partition plate (53) is connected with the bottom surface of the second interstage solid-liquid separation section (50), and the top end of the second partition plate is higher than the lower bottom surface of the second overflow distribution channel (51);
the included angle between the first sliding plate (42) and the bottom end of the first partition plate (43) is 40-120 degrees;
the included angle between the second sliding plate (52) and the bottom end of the second partition plate (53) is 40-120 degrees.
4. An integrated device for deep denitrification of ammonia nitrogen containing wastewater according to claim 1, wherein a semicircular gallery baffle (31), a biological carrier (34), a second aeration pipe system (33) and a submerged impeller (32) are arranged in the short-cut nitrification-anaerobic ammonia oxidation section (30), and are connected with a sedimentation section (60) through a biochemical reaction zone water outlet pipe (35).
5. An integrated device for deep denitrification of ammonia nitrogen containing wastewater according to claim 4, wherein the corridor partition (31) is semicircular, and comprises a first corridor partition and a second corridor partition which are opposite in inner arc and are concentrically arranged, wherein the radius of the first corridor partition is 70% -85% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section (30), and the radius of the second corridor partition is 45% -60% of the radius of the short-cut nitrification-anaerobic ammonia oxidation section (30);
the biological carrier (34) is selected from one of biological ropes, hollow suspended filler or polyurethane foam.
6. The integrated device for deep denitrification of ammonia nitrogen-containing sewage according to claim 1, wherein a water outlet channel (62) is arranged around the top of the sedimentation section (60), a steady flow cylinder (65), a thickener (68) and a sludge collecting hopper (61) are arranged inside, the steady flow cylinder (65) is arranged at the middle position of the sedimentation section (60) in the height direction and is connected with a water outlet pipe (35) of the biochemical reaction zone, the top of the thickener (68) penetrates out of the steady flow cylinder (65) and extends out of the top end of the sedimentation section (60) to be connected with an external stirrer, and the sludge collecting hopper (61) is arranged at the bottom of the sedimentation section (60) and is connected with an external sludge discharging pipe (64).
7. An integrated device for deep denitrification of wastewater containing ammonia and nitrogen according to claim 6, wherein a water outlet groove (63) is arranged below one side of the water outlet groove (62) far away from the sludge collecting hopper (61), the distance between the water outlet groove (62) and the top end of the integrated device is 300-900 mm, and the water outlet groove (63) is 200-500 mm lower than the water outlet groove (62).
8. A treatment method for advanced denitrification of wastewater containing ammonia nitrogen, characterized by being based on an integrated device for advanced denitrification of wastewater containing ammonia nitrogen according to any one of claims 1 to 7, comprising the following steps:
(S1) a part of sewage containing ammonia and nitrogen enters a denitrification section (10), and treated sewage in the denitrification section is obtained after treatment;
(S2) sewage treated by the denitrification section enters a short-range nitrification section (20) through an interstage partition plate (11), treated sewage is obtained by the short-range nitrification section, and partial sludge in the short-range digestion section (20) flows back to the denitrification section (10);
(S3) a part of sewage treated by the short-cut nitrification stage enters the short-cut nitrification-anaerobic ammonia oxidation stage (30) through the first inter-stage solid-liquid separation stage (40), and the other part of sewage treated by the short-cut nitrification stage flows back to the denitrification stage (10) through the first inter-stage solid-liquid separation stage (40) and the first effluent backflow component (80);
(S4) the other part of sewage containing ammonia and nitrogen enters a high-load oxidation section (100), and the sewage treated by the high-load oxidation section is obtained after treatment;
(S5) the sewage treated by the high-load oxidation section enters a short-cut nitrification-anaerobic ammonia oxidation section (30) through a second interstage solid-liquid separation section (50);
(S6) the short-cut nitrification-anaerobic ammonia oxidation section (30) is used for treating the sewage treated by the high-load oxidation section and the sewage treated by the short-cut nitrification section to obtain the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section;
and (S7) the sewage treated by the short-cut nitrification-anaerobic ammonia oxidation section enters a precipitation section (60) to obtain sludge and integrated device effluent, the sludge is directly discharged, one part of the integrated device effluent is refluxed to a denitrification section (10) through a second effluent reflux assembly (90), and the other part of the integrated device effluent is directly discharged.
9. A process according to claim 8 for ammonia containingA process for the deep denitrification of nitrogen wastewater, characterized in that the surface load of the first stage solid-liquid separation section (40) is 0.6-2.0 m 3 /m 2 /h；
The surface load of the second stage solid-liquid separation section (50) is 0.3-1.0 m 3 /m 2 /h；
The surface load of the precipitation section (60) is 1.5-2.0 m 3 /m 2 /h，
The dissolved oxygen concentration of the short-cut nitrification section (20) is 0.5-0.8 mg/L;
the dissolved oxygen concentration of the high-load oxidation section (100) is 1.0-2.0 mg/L;
the dissolved oxygen concentration of the short-cut nitrification-anaerobic ammonia oxidation section (30) is 0.1-0.3 mg/L.
10. The method for deep denitrification of wastewater containing ammonia and nitrogen according to claim 8, wherein the reflux amount of wastewater treated in the short-cut nitrification stage is 30% -70% of that of wastewater treated in the short-cut nitrification stage; the reflux quantity of the water discharged by the integrated device accounts for 20% -70% of the water discharged by the integrated device.
CN202310313779.1A 2023-03-28 2023-03-28 Integrated device for deep denitrification of sewage containing ammonia and nitrogen and treatment method thereof Pending CN116119885A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117049707A (en) * 2023-07-26 2023-11-14 山西资环科技股份有限公司 Integrated cultivation wastewater treatment reactor and application thereof in cultivation wastewater treatment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117049707A (en) * 2023-07-26 2023-11-14 山西资环科技股份有限公司 Integrated cultivation wastewater treatment reactor and application thereof in cultivation wastewater treatment
CN117049707B (en) * 2023-07-26 2024-03-26 山西资环科技股份有限公司 Integrated cultivation wastewater treatment reactor and application thereof in cultivation wastewater treatment

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