CN113998785A - Sewage treatment method based on nitrogen and phosphorus removal process, nitrified liquid separation reflux device and sewage treatment system - Google Patents
Sewage treatment method based on nitrogen and phosphorus removal process, nitrified liquid separation reflux device and sewage treatment system Download PDFInfo
- Publication number
- CN113998785A CN113998785A CN202111334438.XA CN202111334438A CN113998785A CN 113998785 A CN113998785 A CN 113998785A CN 202111334438 A CN202111334438 A CN 202111334438A CN 113998785 A CN113998785 A CN 113998785A
- Authority
- CN
- China
- Prior art keywords
- zone
- water
- separation
- sewage treatment
- liquid
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 108
- 238000000926 separation method Methods 0.000 title claims abstract description 88
- 238000010992 reflux Methods 0.000 title claims abstract description 73
- 239000010865 sewage Substances 0.000 title claims abstract description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 48
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 31
- 239000011574 phosphorus Substances 0.000 title claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 167
- 239000012528 membrane Substances 0.000 claims abstract description 34
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 30
- 239000006228 supernatant Substances 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims description 51
- 230000005484 gravity Effects 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 8
- 238000004062 sedimentation Methods 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
-
- 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
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- 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)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a sewage treatment method based on a nitrogen and phosphorus removal process, a nitrifying liquid separation reflux device and a sewage treatment system, wherein the sewage treatment method treats sewage in a mode of combining MBR (membrane bioreactor) and sludge-water separation, and comprises the following steps of: the sewage enters an anoxic zone and an anaerobic zone in sequence for biochemical treatment and then enters an aerobic membrane pool zone; and separating and refluxing the nitrified liquid in the aerobic membrane tank zone through a separation zone positioned above the anaerobic zone, wherein the supernatant liquid reflows to the anoxic zone to perform denitrification reaction, and the rest concentrated liquid enters the anaerobic zone to perform dephosphorization reaction. By adopting the scheme of the invention to treat the sewage, the concentrated solution directly enters the anaerobic zone by gravity for dephosphorization reaction, the number of reflux pumps is reduced, the operation power consumption is reduced, the supernatant liquid directly enters the anoxic zone, the concentrated solution directly sinks to the anaerobic zone, the interference of the nitrifying solution with high oxygen content to the environment of the anaerobic zone is reduced, and the nitrogen and phosphorus removal efficiency is improved.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment method based on a nitrogen and phosphorus removal process, a nitrifying liquid separation and reflux device and a sewage treatment system.
Background
In the traditional sewage treatment process, most of sludge-water separation systems of the secondary sedimentation tank are vertical flow type, horizontal flow type or radial flow type gravity sedimentation, the sedimentation effect of the sludge-water separation system is closely related to the properties of activated sludge, the concentration of the activated sludge can be contained, generally does not exceed 5000mg/L, the sludge area height can be raised due to the overhigh concentration of the sludge, the sedimentation effect is reduced, the effluent SS exceeds the standard, and the occupied space is larger. Therefore, in order to reduce the floor area of a sewage treatment plant, filter out solid suspended matters, colloids and other substances in raw water and improve the quality of effluent, MBR is usually adopted to replace a secondary sedimentation tank in the traditional process.
However, in the conventional MBR technology, because a secondary sedimentation tank is eliminated, biological nitrogen and phosphorus removal can be achieved by multi-stage reflux from a membrane tank to an aerobic tank, from an aerobic tank to an anoxic tank, and from the anoxic tank to an anaerobic tank, and the multi-stage reflux system is complex and has high power consumption, which is one of key factors restricting the development of the MBR process. Therefore, how to organically combine the two sewage treatment processes, the nitrogen and phosphorus removal efficiency is improved while the occupied area of the sewage treatment system is reduced, and the operation energy consumption is reduced, which is a problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the background technology, and provides a sewage treatment method based on a nitrogen and phosphorus removal process, a nitrifying liquid separation and reflux device and a sewage treatment system, which can improve the nitrogen and phosphorus removal efficiency and reduce the operation energy consumption while reducing the occupied area of the sewage treatment system.
In order to achieve the purpose, the invention provides a sewage treatment method based on a nitrogen and phosphorus removal process, which treats sewage by combining MBR and sludge-water separation, and comprises the following steps: the sewage enters an anoxic zone and an anaerobic zone in sequence for biochemical treatment and then enters an aerobic membrane pool zone;
separating and refluxing the nitrified liquid in the aerobic membrane pool area through a separation area positioned above the anaerobic area, wherein supernatant liquid reflows to the anoxic area to perform denitrification reaction, and the rest concentrated liquid enters the anaerobic area to perform dephosphorization reaction;
concentrated solution directly enters the anaerobic zone by gravity to carry out dephosphorization reaction, the number of reflux pumps is reduced, the operation power consumption is reduced, supernatant liquid directly enters the anoxic zone, the concentrated solution directly sinks to the anaerobic zone, the interference of nitrifying solution with high oxygen content to the environment of the anaerobic zone is reduced, and the nitrogen and phosphorus removal efficiency is improved.
Furthermore, the separation area is provided with a water distribution flower wall for introducing the sewage treated by the aerobic membrane pool area into the separation area; and a nitrifying liquid separation reflux device;
wherein, the water distribution tracery wall is positioned in a water distribution channel communicated with the aerobic membrane pool area and the separation area, and the water distribution holes on the water distribution tracery wall face the aerobic membrane pool area; the water inlet area is set as a water distribution wall, so that the nitrifying liquid flowing back from the aerobic membrane tank is more uniformly distributed, and a better water distribution environment is maintained;
the nitrifying liquid separating and refluxing device is arranged above the anaerobic zone and is positioned at the downstream of the water flow direction of the water distribution tracery wall, and water passing through the water distribution tracery wall enters the nitrifying liquid separating and refluxing device to separate and reflux nitrifying liquid; the sewage can conveniently enter the nitrifying liquid separation reflux device for treatment.
Further, the water flow rate passing through the water distribution holes is 0.07-0.1 m/s; the water flow rate is 0.07-0.1m/s, which is beneficial to the solid-liquid separation of the nitrified liquid.
Further, the nitrifying liquid separating and refluxing device comprises: the folded plate groups are arranged along the water flow direction, and the top of each folded plate forming the folded plate group is provided with a water passing gap which is arranged discontinuously; the water collecting component is arranged above the folded plate group, and a plurality of water passing holes are formed in the side wall of the water collecting component; supernatant entering the water collecting component through the water passing hole is led to an anoxic zone through a reflux pump, and the rest concentrated solution enters an anaerobic zone along the folded plate; through setting up folded plate group, the multilayer folded plate is with solid-liquid separation, and guarantees that the separation effect is stable, and the water gap of crossing at folded plate top is convenient for the supernatant to pass through to the collection of the component that catchments of being convenient for.
Further, the set of flaps includes: the folded plates are arranged at intervals up and down, and the water distribution holes corresponding to each layer of the folded plates are positioned below the corresponding folded plates; the folded plate is provided with a V-shaped cross section with a downward opening, the angle of a V-shaped included angle is adjustable, and the included angle is adjusted within the range of 50-100 degrees; the length of the left side plate and the right side plate which form the V-shaped cross section is adjustable, the length adjusting range is 100mm-170mm, through adjusting the included angle and the length of the two side plates, supernatant is easier to be collected by the water collecting component, the thickness of surface mud on the folded plate can be controlled, concentrated liquid with different water contents can slide into the anaerobic zone along the folded plate, the sludge content in the anaerobic zone is further controlled, and the contradiction of nitrogen and phosphorus removal is reconciled.
The invention also provides a nitrified liquid separating and refluxing device, which is used in the sewage treatment method based on the nitrogen and phosphorus removal process and is used for separating and refluxing the nitrified liquid in the aerobic membrane pool area to the anoxic area, wherein the nitrified liquid separating and refluxing device is arranged in the separation area and is positioned above the anaerobic area, and the nitrified liquid separating and refluxing device comprises: the folded plate group is arranged in the separation area side by side through the fixed frame; the water collecting component is arranged above the folded plate group, the water collecting component is arranged against the water flow direction, and a plurality of water passing holes arranged at intervals are formed in the pipe wall of the water collecting component; the water collecting component is arranged in a horizontal mode, one end of the water collecting component is closed, the other end of the water collecting component is connected with the water inlet end of the reflux pump, and the water outlet end of the reflux pump is connected with the anoxic zone;
the nitrified liquid separation reflux device is arranged above the anaerobic zone, so that separated concentrated liquid can conveniently enter an anaerobic tank, the number of reflux pumps is reduced, and the energy consumption of operation is reduced; the folded plate group and the water collecting component are arranged, so that solid-liquid separation is facilitated, a multistage reflux mode of MBR is replaced, the operation energy consumption is reduced, and meanwhile, the area of a sewage treatment system is reduced; the water holes are horizontally arranged, so that the supernatant can be conveniently collected, and simultaneously, mud can be prevented from entering the water collecting component.
Further, the set of flaps includes: the folded plates are arranged on the fixing frame at intervals up and down, and the water distribution holes corresponding to each layer of the folded plates are positioned below the corresponding folded plates; the folded plate is a V-shaped structure with a downward opening and formed by connecting the top ends of a left side plate and a right side plate, the connecting part of the top ends of the two side plates is provided with water passing gaps which are arranged discontinuously, and the included angle between the two side plates is adjustable; the left side plate and the right side plate are both composed of an upper part and a lower part, and the upper side plate and the lower side plate form side plates with telescopic structures so as to adjust the length of the side plates; through reasonable setting of the length and the angle of the folded plate, supernatant liquid after solid-liquid separation of nitrified liquid is more easily collected by the water collecting component, the thickness of sludge on the folded plate is controlled, concentrated liquid with different water contents slides into the anaerobic zone, the content of sludge entering the anaerobic zone is controlled, and the contradiction of nitrogen and phosphorus removal is reconciled.
The inner surface of the lower end of the upper side plate is provided with a clamping strip protruding inwards, and the upper end of the lower side plate is provided with at least two clamping grooves which are arranged in parallel and are matched with the clamping strip; the structure can realize the length adjustment of the two side plates of the folded plate, has simple structure and is convenient to manufacture and install, thereby providing convenient conditions for implementing the invention.
The invention also provides a sewage treatment system based on the nitrogen and phosphorus removal process, which comprises an anoxic zone, an anaerobic zone and an aerobic membrane pool zone which are sequentially communicated, and a separation zone communicated with the aerobic membrane pool zone through a water distribution channel, wherein the water outlet end of the separation zone is connected with the anoxic zone, and the bottom of the separation zone is communicated with the anaerobic zone; a water distribution tracery wall with water distribution holes is arranged between the water distribution channel and the separation area and faces the water flow direction; the separation zone is internally provided with the nitrified liquid separation reflux device, supernatant separated by the nitrified liquid separation reflux device flows back to the anoxic zone, and concentrated liquid falls into the anaerobic zone; the water distribution holes are correspondingly arranged below each layer of folded plates of the nitrified liquid separation and reflux device.
Compared with the prior art, the invention has the following technical effects:
1. according to the sewage treatment method, MBR and sludge-water separation are organically combined, the separated concentrated solution directly enters the anaerobic zone for dephosphorization treatment, and the supernatant flows back to the anoxic zone for denitrification and denitrification reaction, so that the occupied area of a sewage treatment system can be reduced, the denitrification and dephosphorization efficiency can be improved, and the operation energy consumption can be reduced;
2. the nitrified liquid separation reflux device can perform solid-liquid separation, the length and the angle of the folded plate can be adjusted, the length and the angle of the folded plate are reasonably set, so that supernatant liquid obtained after the solid-liquid separation of nitrified liquid is more easily collected by the water collecting component, the thickness of sludge on the upper surface of the folded plate is controlled, concentrated liquid with different water contents slides into an anaerobic zone, the content of sludge entering the anaerobic zone is controlled, and the contradiction of nitrogen and phosphorus removal is reconciled;
3. the nitration liquid separation reflux device comprises the folded plate combined water collecting component, and is simple in structure, reasonable in scheme design, easy to install, high in practicability and capable of ensuring the stability of the separation effect due to the fact that separated supernatant liquid flows back and concentrated liquid sinks;
4. the sewage treatment system is provided with the water distribution tracery wall, so that the nitrifying liquid flowing back from the aerobic membrane tank can enter the nitrifying liquid separation and backflow device in a more uniform distribution manner, a good water distribution environment is maintained, and the nitrifying liquid separation and backflow are facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles and structures of the invention. In the figure:
FIG. 1 is a flow diagram of a sewage treatment method based on a denitrification and dephosphorization process;
FIG. 2 is a schematic structural three-dimensional diagram of a sewage treatment system based on a denitrification and dephosphorization process according to the present invention;
fig. 3 is a schematic view of the arrangement of the flap assembly and the connection relationship with the fixing frame of the present invention.
Fig. 4 is an enlarged schematic view of the telescopic structure of the flap of the present invention.
Reference numbers in the figures: 100. an anoxic zone; 200. an anaerobic zone; 300. an aerobic membrane pool area; 400. a separation zone; 500. a reflux pump; 600. a water distribution tracery wall 610 and water distribution holes; 700. a nitrified liquid separation reflux device 710, a flap group 711, flaps 712, a limiting hinge/limiter 720, a water collecting component 721 and water through holes; 800. a fixed frame 810, a fixed column 820 and a bearing platform; 900. the telescopic structure comprises 900A, clamping strips, 900B and clamping grooves; E. the upper parts of the side plates at the two sides of the folded plate, and the lower parts of the side plates at the two sides of the folded plate.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1: the sewage treatment method based on the denitrification and dephosphorization process of the invention is described in detail below with reference to the attached drawing 1: the embodiment provides a sewage treatment method based on a nitrogen and phosphorus removal process, which treats sewage in a mode of combining MBR (membrane bioreactor) and sludge-water separation, and comprises the following steps of: the sewage enters the anoxic zone 100 and the anaerobic zone 200 in sequence for biochemical treatment and then enters the aerobic membrane tank zone 300; nitrifying liquid in the aerobic membrane tank area 300 is subjected to nitrifying liquid separation and backflow through a separation area 400 located above the anaerobic area 200, wherein supernatant liquid flows back to the anoxic area 100 to be subjected to denitrification, and the remaining concentrated liquid 200 enters the anaerobic area to be subjected to dephosphorization. Concentrated solution directly enters the anaerobic zone 200 by gravity to carry out dephosphorization reaction, the number of reflux pumps is reduced, the operation power consumption is reduced, supernatant liquid directly enters the anoxic zone, the concentrated solution directly sinks to the anaerobic zone, the interference of nitrifying solution with high oxygen content to the environment of the anaerobic zone is reduced, and the nitrogen and phosphorus removal efficiency is improved.
The separation zone 400 is configured to separate the solids from the liquids as follows, with reference to fig. 2: the separation zone 400 is provided with a water distribution tracery wall 600 and a nitration liquid separation reflux device 700 which introduce the sewage treated by the aerobic membrane tank zone 300 into the separation zone; the water distribution tracery wall 600 is positioned in a water distribution channel communicated with the aerobic membrane pool area 300 and the separation area 400, the water distribution holes 610 on the water distribution tracery wall 600 face the aerobic membrane pool area 300, namely are arranged in the direction facing to the water flow, so that the sewage from the aerobic membrane pool area 300 enters the separation area to be subjected to solid-liquid separation by using the nitrified liquid separation reflux device 700, and the water inlet area is set as the water distribution tracery wall, so that the nitrified liquid refluxed from the aerobic membrane pool can be uniformly distributed, and a good water distribution environment can be maintained;
the nitrified liquid separating and refluxing device 700 is arranged above the anaerobic zone 200 and is positioned at the downstream of the water flow direction of the water distributing tracery wall 600, and water passing through the water distributing tracery wall 600 enters the nitrified liquid separating and refluxing device 700 to separate and reflux nitrified liquid; the sewage can conveniently enter the nitrifying liquid separation and reflux device 700 for treatment. The water flow rate through the water distribution holes 610 is 0.07-0.1 m/s; the water flow rate is 0.07-0.1m/s, which is beneficial to the solid-liquid separation of the nitrified liquid.
The nitrifying liquid separation reflux unit includes: the folding plate groups 710 and the water collecting members 720, the folding plate groups 710 are arranged along the water flow direction, and the top of each folding plate 711 forming the folding plate groups 710 is provided with water passing gaps which are discontinuously arranged, so that the water collecting members 720 can collect supernatant, mud is prevented from entering the water collecting members 720, and the denitrification and denitrification efficiency is improved; the water collecting member 720 is arranged above the flap group 710, and a plurality of water through holes 721 are arranged on the pipe wall of the water collecting member 720; wherein, the supernatant fluid entering the water collecting component 720 through the water hole 721 is led to the anoxic zone 100 through the reflux pump 500 for denitrification reaction, and the rest concentrated solution enters the anaerobic zone 200 along the folded plate 711 for dephosphorization reaction arc; through setting up folded plate group, the multilayer folded plate is with solid-liquid separation, and guarantees that the separation effect is stable. The reflux pump can adopt a submersible sewage pump, a self-sucking pump or a wall-penetrating pump, the nitrified supernatant flows back to the anoxic tank from the submerged sewage pump, and the environmental interference of the nitrified liquid with high oxygen content to the anaerobic zone is reduced.
Referring to fig. 3, the folded plate group 710 includes a plurality of folded plates 711 arranged at intervals up and down, the plurality of folded plates 711 may be arranged uniformly at the same angle, or at different angles and different heights, and the water distribution holes 610 corresponding to each layer of folded plates 711 are located below the corresponding folded plates, so that sewage is prevented from directly entering the water collecting member, and the working stability of the water collecting member is improved; the folded plate 711 has a V-shaped cross section with a downward opening, the angle of a V-shaped included angle is adjustable, and the included angle is adjusted within the range of 50-100 degrees; the length of the left side plate and the right side plate which form the V-shaped cross section is adjustable, the length adjusting range is 100mm-170mm, through adjusting the included angle and the length of the two side plates, supernatant is easier to be collected by the water collecting component, the thickness of surface mud on the folded plate can be controlled, concentrated liquid with different water contents can slide into the anaerobic zone along the folded plate, the sludge content in the anaerobic zone is further controlled, and the contradiction of nitrogen and phosphorus removal is reconciled.
The folded plate 711 is made of any one of stainless steel, carbon steel, glass fiber reinforced plastic, PVC, ABS and the like, and when the folded plate 711 is made of PVC and ABS, the adjustment of the included angle can be realized by utilizing the elasticity of the material; when stainless steel, carbon steel and glass fiber reinforced plastic are adopted, the side plates on the two sides of the V shape are connected by hinges so as to realize the angle adjustment. The length can be adjusted by adopting the mutually matched clamping strip and clamping groove.
The sewage treatment method based on the nitrogen and phosphorus removal process disclosed by the embodiment utilizes an MBR sewage treatment process and utilizes the separation of sludge and water to optimize the sewage treatment process.
Example 2: the embodiment provides a nitrifying liquid separating and refluxing device, which is used for splitting nitrifying liquid treated in an aerobic membrane pool zone and refluxing the nitrifying liquid to an anoxic zone in a sewage treatment method based on a nitrogen and phosphorus removal process, wherein the nitrifying liquid separating and refluxing device is arranged in a separation zone and is positioned above an anaerobic zone.
Referring to fig. 2, the nitrified liquid separating and refluxing apparatus of the present embodiment includes: a flap group 710 and a water collecting component 720, wherein the flap group 710 is arranged in the separation area side by side through a fixing frame 800; the water collecting member 720 is arranged above the flap group 710, the water collecting member 720 is arranged facing the water flow direction, a plurality of water passing holes 721 arranged at intervals are formed in the side wall of the water collecting member 720, and preferably, the water passing holes 721 are arranged at equal intervals; the water collecting member of this embodiment adopts a water collecting pipe with a pipe diameter of 50mm, the aperture of the water passing hole 721 is 20mm, the center distance between adjacent water passing holes 721 is 180mm, and the orifice is arranged towards the water passing tracery wall 610, of course, the water collecting member 720 can also adopt a water collecting tank as other embodiments of the present invention, and the water passing hole 721 can be arranged on one side of the water collecting member 720 or on two sides opposite to the water collecting member 720. One end of the water collecting member 721 is closed, the other end of the water collecting member penetrates through the wall body of the separation area to be connected with the water inlet end of the reflux pump 500, the water outlet end of the reflux pump 500 is connected with the anoxic area, and the reflux pump can be a submersible sewage pump, a self-sucking pump or a wall-penetrating pump. The nitrified liquid separation reflux device is arranged above the anaerobic zone, so that separated concentrated liquid can conveniently enter an anaerobic tank, the number of reflux pumps is reduced, and the energy consumption of operation is reduced; the baffle group 710 and the water collecting component 720 are arranged, so that solid-liquid separation is facilitated, a multistage reflux mode of MBR is replaced, the operation energy consumption is reduced, meanwhile, the area of a sewage treatment system is reduced, and the input cost of sewage treatment is reduced.
The folded plate group 710 comprises a plurality of folded plates 711 which are arranged at intervals up and down, the folded plates 711 are arranged on the fixing frame 800, the water distribution holes corresponding to each layer of folded plates are positioned below the corresponding folded plates, and the solid-liquid separation effect and stability are ensured by the plurality of layers of folded plates 711 which are arranged at intervals, so that the working stability of the device is improved; the folded plate 711 is a V-shaped structure with a downward opening formed by connecting the top ends of a left side plate and a right side plate, a water passing gap which is discontinuously arranged is formed at the connecting position of the top ends of the two side plates, and the included angle between the two side plates is adjustable; the left side plate 711A and the right side plate 711B are both composed of an upper part and a lower part, and the upper side plate E and the lower side plate F form side plates of a telescopic structure so as to adjust the length of the side plates when the side plates are installed; through reasonable setting of the length and the angle of the folded plate, supernatant liquid after solid-liquid separation of nitrified liquid is more easily collected by the water collecting component, the thickness of sludge on the folded plate is controlled, concentrated liquid with different water contents slides into the anaerobic zone, the content of sludge entering the anaerobic zone is controlled, and the contradiction of nitrogen and phosphorus removal is reconciled. The folded plate 711 is made of any one of stainless steel, carbon steel, glass fiber reinforced plastic, PVC, ABS and the like, and when the folded plate 711 is made of PVC and ABS, the adjustment of the included angle can be realized by utilizing the elasticity of the material; when stainless steel, carbon steel and glass fiber reinforced plastic are adopted, the side plates on the two sides of the V shape are connected by a limiting hinge 712 or a limiting device 712 with a limiting function, so that the angle can be adjusted.
The length adjustment of the left side plate 711A and the right side plate 711B of the present embodiment is achieved by the following structure: referring to fig. 4, the inner surface of the lower end of the upper side plate E is provided with a clamping strip 900A protruding inwards, the upper end of the lower side plate F is provided with at least two clamping grooves 900B which are arranged in parallel and are matched with the clamping strip, and the clamping strip 900A and the clamping grooves 900B form a telescopic structure 900, so that the lengths of the left side plate 711A and the right side plate 711B can be adjusted conveniently; the structure can realize the length adjustment of the two side plates of the folded plate, has simple structure and is convenient to manufacture and install, thereby providing convenient conditions for implementing the invention.
The fixing frame 800 facilitates fixing and arrangement of the folded plate 711, as shown in fig. 3, the fixing frame 800 includes a plurality of fixing columns 810 and a bearing platform 820 disposed on the fixing columns 810 and used for supporting the folded plate 711, the bearing platform 820 can be made of steel pipes fixedly connected with the fixing columns 810, weight is reduced, and cost is reduced. The distance between the fixing frames 800 of this embodiment is 150 mm. The included angle of the folded plate is limited and kept through the limiter/the limiting hinge with the limiting function, and the folded plate is supported through the bearing platform 820, so that the folded plate 711 is guaranteed to be kept at the horizontal interval and the interlayer interval of the upper layer and the lower layer, the stability of the folded plate is guaranteed, and the stability of the separation effect is guaranteed.
Example 3: referring to fig. 1 to 4, the embodiment provides a sewage treatment system based on a nitrogen and phosphorus removal process, which includes an anoxic zone 100, an anaerobic zone 200, an aerobic membrane tank zone 300, and a separation zone 400 communicated with the aerobic membrane tank zone 300 through a water distribution channel, wherein the water outlet end of the separation zone 400 is connected with the anoxic zone 100, and the bottom of the separation zone 400 is communicated with the anaerobic zone 200; a water distribution tracery wall 600 with water distribution holes is arranged between the water distribution channel and the separation area 400 along the water flow direction; the nitrified liquid separation and reflux device 700 described in embodiment 2 is arranged in the separation zone 400, the supernatant separated by the nitrified liquid separation and reflux device 700 is refluxed to the anoxic zone 100 by the reflux pump 500, and the concentrated solution falls into the anaerobic zone 200 by gravity; a water distribution hole 610 is correspondingly arranged below each layer of folded plates 711 of the nitrified liquid separating and refluxing device. Concentrated solution directly enters the anaerobic zone 200 by gravity to carry out dephosphorization reaction, the number of reflux pumps is reduced, the operation power consumption is reduced, supernatant liquid directly enters the anoxic zone, the concentrated solution directly sinks to the anaerobic zone, the interference of nitrifying solution with high oxygen content to the environment of the anaerobic zone is reduced, and the nitrogen and phosphorus removal efficiency is improved. The sewage treatment system based on the nitrogen and phosphorus removal process disclosed by the embodiment optimizes the sewage treatment system by using a mud-water separation principle on the basis of an MBR sewage treatment system, so that the sewage treatment system reduces the operation energy consumption and the occupied area of the sewage treatment system while improving the effect of phosphorus and phosphorus removal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A sewage treatment method based on a nitrogen and phosphorus removal process is characterized by comprising the following steps: the sewage enters an anoxic zone and an anaerobic zone in sequence for biochemical treatment and then enters an aerobic membrane pool zone;
and separating and refluxing the nitrified liquid in the aerobic membrane tank zone through a separation zone positioned above the anaerobic zone, wherein the supernatant liquid reflows to the anoxic zone to perform denitrification reaction, and the rest concentrated solution directly enters the anaerobic zone to perform dephosphorization reaction.
2. The sewage treatment method based on the nitrogen and phosphorus removal process as claimed in claim 1, wherein the separation zone is provided with a water distribution wall for introducing the nitrifying liquid in the aerobic membrane tank zone into the separation zone; and a nitrifying liquid separation reflux device;
wherein, the water distribution tracery wall is positioned in a water distribution channel communicated with the aerobic membrane pool area and the separation area, and the water distribution holes on the water distribution tracery wall face the aerobic membrane pool area;
the nitrifying liquid separating and refluxing device is arranged above the anaerobic zone and is positioned at the downstream of the water flow direction of the water distribution tracery wall, and water passing through the water distribution tracery wall enters the nitrifying liquid separating and refluxing device to separate and reflux nitrifying liquid.
3. The method of claim 2, wherein the flow rate of water passing through the distribution holes is 0.07-0.1 m/s.
4. The sewage treatment method based on the denitrification and dephosphorization process as claimed in claim 2, wherein the nitrified liquid separating and refluxing device comprises:
the folded plate groups are arranged along the water flow direction, and the top of each folded plate forming the folded plate group is provided with a water passing gap which is arranged discontinuously; and
the water collecting component is arranged above the folded plate group and used for collecting supernatant, and a plurality of water passing holes are formed in the side wall of the water collecting component;
supernatant liquid entering the water collecting component through the water passing hole is led to the anoxic zone through the reflux pump, and the rest concentrated solution enters the anaerobic zone along the folded plate.
5. The sewage treatment method based on the denitrification and dephosphorization process as claimed in claim 4, wherein the baffle group comprises:
the folded plates are arranged at intervals up and down, and the water distribution holes corresponding to each layer of the folded plates are positioned below the corresponding folded plates;
the folded plate is provided with a V-shaped cross section with a downward opening, the angle of a V-shaped included angle is adjustable, and the included angle is adjusted within the range of 50-100 degrees; the lengths of the left side plate and the right side plate which form the V-shaped cross section are adjustable, the length adjusting range is 100mm-170mm, and concentrated liquid with different water contents slides into the anaerobic zone along the folded plate by adjusting the included angle and the length of the two side plates.
6. A nitrified liquid separating and refluxing device used in the sewage treatment method based on nitrogen and phosphorus removal process as claimed in any one of claims 1 to 5, wherein nitrified liquid in an aerobic membrane pool zone is separated and refluxed to an anoxic zone, the nitrified liquid separating and refluxing device is arranged in a separation zone and is positioned above an anaerobic zone, and the device is characterized by comprising:
the folded plate group is arranged in the separation area side by side through the fixed frame; and
the water collecting component is arranged above the folded plate group, the water collecting component is arranged against the water flow direction, and a plurality of water passing holes arranged at intervals are formed in the side wall of the water collecting component;
wherein, a plurality of the water hole of crossing is the level all arranges, the one end of the component that catchments is sealed, and the other end is connected with the end of intaking of backwash pump, the play water end and the anoxic zone of backwash pump are connected.
7. The nitrified liquid separating and refluxing device as claimed in claim 6, wherein the baffle group comprises:
the folded plates are arranged on the fixing frame at intervals up and down, and the water distribution holes corresponding to each layer of the folded plates are positioned below the corresponding folded plates;
the folded plate is a V-shaped structure with a downward opening and formed by connecting the top ends of a left side plate and a right side plate, the connecting part of the top ends of the two side plates is provided with water passing gaps which are arranged discontinuously, and the included angle between the two side plates is adjustable;
the left side plate and the right side plate are both composed of an upper part and a lower part, and the upper side plate and the lower side plate form side plates of a telescopic structure so as to adjust the length of the side plates.
8. The nitrified liquid separating and refluxing apparatus according to claim 7, wherein,
the inner surface of the lower end of the upper side plate is provided with a clamping strip protruding inwards, and the upper end of the lower side plate is provided with at least two clamping grooves which are arranged in parallel and are matched with the clamping strip.
9. A sewage treatment system based on a nitrogen and phosphorus removal process is characterized by comprising an anoxic zone, an anaerobic zone and an aerobic membrane pool zone which are sequentially communicated, and a separation zone communicated with the aerobic membrane pool zone through a water distribution channel, wherein the water outlet end of the separation zone is connected with the anoxic zone, and the bottom of the separation zone is communicated with the anaerobic zone;
a water distribution tracery wall with water distribution holes is arranged between the water distribution channel and the separation area and faces the water flow direction;
a nitrified liquid separating and refluxing device as defined in any one of claims 6 to 8 is arranged in the separation zone, supernatant separated by the nitrified liquid separating and refluxing device is refluxed to the anoxic zone, and concentrated liquid falls into the anaerobic zone;
the water distribution holes are correspondingly arranged below each layer of folded plates of the nitrified liquid separation and reflux device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334438.XA CN113998785B (en) | 2021-11-11 | 2021-11-11 | Sewage treatment method based on denitrification and dephosphorization process, nitrifying liquid separation reflux device and sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334438.XA CN113998785B (en) | 2021-11-11 | 2021-11-11 | Sewage treatment method based on denitrification and dephosphorization process, nitrifying liquid separation reflux device and sewage treatment system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113998785A true CN113998785A (en) | 2022-02-01 |
| CN113998785B CN113998785B (en) | 2023-09-12 |
Family
ID=79928595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111334438.XA Active CN113998785B (en) | 2021-11-11 | 2021-11-11 | Sewage treatment method based on denitrification and dephosphorization process, nitrifying liquid separation reflux device and sewage treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113998785B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282683A (en) * | 2023-02-20 | 2023-06-23 | 宝航环境修复有限公司 | sMBR garbage leachate treatment system and process reflux method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048630A1 (en) * | 1980-09-24 | 1982-03-31 | Nealvane Limited | Treatment of sewage |
| CN200954403Y (en) * | 2006-09-19 | 2007-10-03 | 威海广泰空港设备股份有限公司 | Oil-water non-homogeneous-phase flow primary separation apparatus |
| JP2010159622A (en) * | 2008-12-09 | 2010-07-22 | Jfe Engineering Corp | Legged permeable type wave dissipating structure |
| CN202096797U (en) * | 2011-06-14 | 2012-01-04 | 四川四通欧美环境工程有限公司 | Sludge-water separating device |
| CN202478665U (en) * | 2011-12-30 | 2012-10-10 | 厦门飞华环保器材有限公司 | V-shaped pipe sedimentation tank device |
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
| CN207632597U (en) * | 2017-11-23 | 2018-07-20 | 沈阳工业大学 | Country sewage integrated treatment unit |
| CN111467845A (en) * | 2020-05-29 | 2020-07-31 | 郑州益源天泽环境科技有限公司 | Active granular sludge circulation separation screening installation |
| CN211595188U (en) * | 2020-01-19 | 2020-09-29 | 福建龙净环保股份有限公司 | Parallel AAO-MBR reactor |
| WO2020199360A1 (en) * | 2019-03-29 | 2020-10-08 | 云南合续环境科技有限公司 | Method for deep removal of phosphorus and nitrogen in sewage treatment |
| WO2020199363A1 (en) * | 2019-03-29 | 2020-10-08 | 云南合续环境科技有限公司 | Device for deep dephosphorization and denitrification of sewage treatment |
-
2021
- 2021-11-11 CN CN202111334438.XA patent/CN113998785B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048630A1 (en) * | 1980-09-24 | 1982-03-31 | Nealvane Limited | Treatment of sewage |
| CN200954403Y (en) * | 2006-09-19 | 2007-10-03 | 威海广泰空港设备股份有限公司 | Oil-water non-homogeneous-phase flow primary separation apparatus |
| JP2010159622A (en) * | 2008-12-09 | 2010-07-22 | Jfe Engineering Corp | Legged permeable type wave dissipating structure |
| CN202096797U (en) * | 2011-06-14 | 2012-01-04 | 四川四通欧美环境工程有限公司 | Sludge-water separating device |
| CN202478665U (en) * | 2011-12-30 | 2012-10-10 | 厦门飞华环保器材有限公司 | V-shaped pipe sedimentation tank device |
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
| CN207632597U (en) * | 2017-11-23 | 2018-07-20 | 沈阳工业大学 | Country sewage integrated treatment unit |
| WO2020199360A1 (en) * | 2019-03-29 | 2020-10-08 | 云南合续环境科技有限公司 | Method for deep removal of phosphorus and nitrogen in sewage treatment |
| WO2020199363A1 (en) * | 2019-03-29 | 2020-10-08 | 云南合续环境科技有限公司 | Device for deep dephosphorization and denitrification of sewage treatment |
| CN211595188U (en) * | 2020-01-19 | 2020-09-29 | 福建龙净环保股份有限公司 | Parallel AAO-MBR reactor |
| CN111467845A (en) * | 2020-05-29 | 2020-07-31 | 郑州益源天泽环境科技有限公司 | Active granular sludge circulation separation screening installation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282683A (en) * | 2023-02-20 | 2023-06-23 | 宝航环境修复有限公司 | sMBR garbage leachate treatment system and process reflux method thereof |
| CN116282683B (en) * | 2023-02-20 | 2023-08-15 | 宝航环境修复有限公司 | sMBR garbage leachate treatment system and process reflux method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113998785B (en) | 2023-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021036458A1 (en) | Efficient self-circulation biological denitrification device and working method therefor | |
| US6309553B1 (en) | Phase separator having multiple separation units, upflow reactor apparatus, and methods for phase separation | |
| US8728318B2 (en) | Settling device, purifier comprising a settling device and methods for anaerobic or aerobic purification of waste water | |
| US8021552B2 (en) | Process and reactor for anaerobic waste water purification | |
| US20090223890A1 (en) | Process and reactor for anaerobic waste water purification | |
| CN103435232B (en) | AABR (Anaerobic Baffled Reactor)-compound type MBR (Membrane Biological Reactor) integrated device and method for treating organic wastewater | |
| CN203866098U (en) | High-efficiency anaerobic and aerobic integrated reactor | |
| CN106927638B (en) | Multistage diversion type MBBR sewage treatment system and treatment method | |
| CN202124518U (en) | Multistage downflow bioaeration filter | |
| CN219279631U (en) | Denitrification and denitrification system combining fluidized bed and denitrification deep bed filter | |
| CN110526395B (en) | Rotational flow anaerobic reactor for wastewater treatment system | |
| CN113998785B (en) | Sewage treatment method based on denitrification and dephosphorization process, nitrifying liquid separation reflux device and sewage treatment system | |
| CN112661345A (en) | MBR sewage treatment method and device based on ecological pool technology | |
| CN107973399B (en) | High-efficient three-phase separation system | |
| CN216777998U (en) | Skid-mounted efficient mud-water separation equipment | |
| CN115353204A (en) | Baffle treatment system | |
| CN211004943U (en) | Reclaimed water reuse wastewater treatment system | |
| CN109626557B (en) | Membrane bioreactor capable of automatically adjusting MLSS concentration | |
| CN203451338U (en) | AABR (anaerobic aerobic biofilm reactor)-combined type MBR (membrane bioreactor) integrated device for treating organic waste water | |
| CN106430582A (en) | Oblique plate type membrane-biological integrated wastewater treatment device and treatment method thereof | |
| CN207061970U (en) | A kind of compact high efficient combined stuffing device | |
| CN112408613A (en) | Wastewater treatment system and method | |
| CN205603318U (en) | Good oxygen integrative sewage treatment device of anaerobism | |
| CN220723799U (en) | Activated sludge recovery device and sewage treatment system | |
| CN109292980A (en) | A kind of adjustable multistage AO-MBBR process spent water processing unit of series and method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Building 12, No. 133 Yaozhai Road, Jinshui District, Zhengzhou City, Henan Province, 450000, 2806 Patentee after: Walker Environmental Technology Co.,Ltd. Address before: 450000 302, office building, No.27, zhengliu street, Jinshui District, Zhengzhou City, Henan Province Patentee before: Grenkley Environmental Technology Co.,Ltd. |