CN114314837A - Annular biochemical pool and high-concentration organic wastewater treatment process - Google Patents
Annular biochemical pool and high-concentration organic wastewater treatment process Download PDFInfo
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- CN114314837A CN114314837A CN202210002762.XA CN202210002762A CN114314837A CN 114314837 A CN114314837 A CN 114314837A CN 202210002762 A CN202210002762 A CN 202210002762A CN 114314837 A CN114314837 A CN 114314837A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000004065 wastewater treatment Methods 0.000 title abstract description 6
- 239000010802 sludge Substances 0.000 claims abstract description 152
- 238000004062 sedimentation Methods 0.000 claims abstract description 114
- 238000001179 sorption measurement Methods 0.000 claims abstract description 53
- 239000010865 sewage Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 230000004888 barrier function Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 230000029087 digestion Effects 0.000 claims description 23
- 238000005273 aeration Methods 0.000 claims description 20
- 238000005191 phase separation Methods 0.000 claims description 14
- 239000006228 supernatant Substances 0.000 claims description 9
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- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
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- 239000002351 wastewater Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
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- 206010021143 Hypoxia Diseases 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 10
- 229910052698 phosphorus Inorganic materials 0.000 description 10
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- 239000007789 gas Substances 0.000 description 9
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Abstract
The application provides an annular biochemical tank and a high-concentration organic wastewater treatment process, wherein the biochemical tank comprises a tank body, the tank body comprises a tank bottom wall, and a first enclosing barrier, a second enclosing barrier, a third enclosing barrier, two first retaining walls and two second retaining walls which are all connected with the tank bottom wall; the area surrounded by the first enclosure is an adsorption sedimentation tank, the two first retaining walls are arranged between the first enclosure and the second enclosure to jointly define an anaerobic tank and an anoxic tank which are circumferentially arranged and communicated on the first enclosure, and the anaerobic tank is communicated with the adsorption sedimentation tank; the two second retaining walls are arranged between the second enclosure and the third enclosure so as to jointly define an aerobic tank and an aerobic sedimentation tank which are circumferentially distributed and communicated with the second enclosure; the anoxic tank is communicated with the aerobic tank; the aerobic sedimentation tank is communicated with the anaerobic tank through a sludge return pipe; the aerobic sedimentation tank is communicated with the anoxic tank through a mixed liquid return pipe. Compact structure, small occupied area and good sewage treatment effect.
Description
Technical Field
The application relates to the field of environmental protection equipment, in particular to an annular biochemical tank and a high-concentration organic wastewater treatment process.
Background
In recent years, the development of industrialization brings convenience to human life, and meanwhile, serious environmental pollution problems are caused. In terms of sewage discharge, the concentration of sewage discharged in industrial production is higher and higher, the industrial discharge standard is stricter and stricter, the indexes such as COD (chemical oxygen demand), ammonia nitrogen, total phosphorus and the like are required, and the land for constructing sewage treatment facilities is very limited in order to achieve the maximum benefit of enterprises, so the difficulty of high-concentration sewage treatment is further increased. At present, in a sewage treatment process, an A2O process and an AB process have respective advantages and disadvantages, wherein the A2O process is an AAO process.
The A2O process has stable operation, and has the functions of removing organic matters, nitrogen and phosphorus, but when the inlet water contains refractory organic matters, the process has the following problems: 1. the organic matters which are difficult to degrade are difficult to be degraded and removed by microorganisms, and the COD of the effluent can not be ensured to stably reach the standard; 2. the refractory organic matter can not be rapidly utilized by denitrifying microorganisms to provide a carbon source for the denitrification process; 3. in the aerobic tank, the degradation process of high-concentration organic matters and the nitrification process compete for oxygen, so that the retention time of the aerobic tank is long, and the nitrification process is not thorough, thereby influencing denitrification and the standard reaching of ammonia nitrogen effluent; 4. the high-concentration organic wastewater is easy to cause mass propagation of filamentous fungi, so that the problems of poor sedimentation effect, sludge bleeding and the like of a secondary sedimentation tank caused by sludge bulking occur.
The AB process is developed for removing organic matter and has poor nitrogen and phosphorus removing effect, and the AB process is characterized in that an aeration tank is divided into a high-load section and a low-load section, and each section is provided with an independent precipitation system. The high-load section has short residence time, mainly takes the biological flocculation adsorption effect, can quickly adsorb refractory organic matters to be removed in a mud discharging mode through a sedimentation tank at the rear end, has long residence time at the low-load section, removes the organic matters through a microbial degradation process, has poor integral nitrogen and phosphorus removal effect, and cannot ensure that the nitrogen and phosphorus of the effluent reach the standard.
The two treatment processes have the problems of large occupied area, independent operation of each unit, no contribution to field management, long pipeline connection between the tanks, large head loss and the like.
Disclosure of Invention
The present application aims to provide an annular biochemical tank and a high concentration organic wastewater treatment process to improve at least one of the above-mentioned technical problems.
The invention is particularly such that:
in view of the above, the present application provides an annular biochemical tank for treating high-concentration organic wastewater, including:
the pool comprises a pool body, a first baffle, a second baffle, a third baffle, two first retaining walls and two second retaining walls, wherein the pool body comprises a pool bottom wall, and the first baffle, the second baffle, the third baffle, the two first retaining walls and the two second retaining walls are all connected with the pool bottom wall; the area enclosed by the first enclosure is an adsorption sedimentation tank, the first enclosure is positioned in the area enclosed by the second enclosure, and the second enclosure is positioned in the area enclosed by the third enclosure; the two first retaining walls are arranged between the first enclosure and the second enclosure to jointly define an anaerobic pool and an anoxic pool which are circumferentially arranged and communicated with each other on the first enclosure, and the anaerobic pool is communicated with the adsorption sedimentation pool; the two second retaining walls are arranged between the second enclosure and the third enclosure so as to jointly define an aerobic tank and an aerobic sedimentation tank which are circumferentially distributed and communicated with the second enclosure; the anoxic tank is communicated with the aerobic tank; the aerobic sedimentation tank is communicated with the anaerobic tank through a sludge return pipe; the aerobic sedimentation tank is communicated with the anoxic tank through a mixed liquid return pipe.
In one embodiment of the invention, the inner bottom wall of the adsorption sedimentation tank protrudes downwards from the inner bottom walls of the anaerobic tank, the anoxic tank, the aerobic tank and the aerobic sedimentation tank in the depth direction of the tank body; the first fender that encloses is provided with the raw water import with adsorbing the sedimentation tank intercommunication, and the direction of intaking of raw water import encloses the fender with first tangent and be located the below of anaerobism pond, oxygen deficiency pond, good oxygen pond and good oxygen sedimentation tank.
In one embodiment of the invention, the adsorption sedimentation tank comprises a first constant-diameter cavity section, a variable-diameter cavity section and a second constant-diameter cavity section which are arranged from bottom to top in the depth direction of the adsorption sedimentation tank, and the inner diameter of the variable-diameter cavity section gradually increases from the first constant-diameter cavity section to the second constant-diameter cavity section; the first constant-diameter cavity section is an adsorption area, the adsorption area is provided with a first aeration system and an annular sludge discharge hopper, and the annular sludge discharge hopper is used for conveying sludge to a sludge anaerobic digestion tank; the second constant diameter cavity section and the variable diameter cavity section jointly form a three-phase separation area; the three-phase separation zone is provided with a three-phase separation system, and the adsorption sedimentation tank is communicated with the anaerobic tank through a water outlet part of the three-phase separation system.
In one embodiment of the invention, vertical shaft stirrers are arranged in the anaerobic tank and the anoxic tank.
In an embodiment of the invention, the annular biochemical pool further comprises a first annular track plate, a second annular track plate and two strip-shaped track plates, the first annular track plate and the second annular track plate are respectively connected with the tops of the second enclosure and the third enclosure, the two strip-shaped track plates are arranged in a crossed manner, one end of each strip-shaped track plate is connected with the second enclosure, and the other end of each strip-shaped track plate spans the second enclosure and is connected with the third enclosure.
In one embodiment of the invention, the aerobic tank is internally provided with a second aeration system, and the aerobic sedimentation tank is internally provided with a third aeration system.
In one embodiment of the invention, a sludge sedimentation screening device is further arranged in the aerobic sedimentation tank, the sludge sedimentation screening device comprises a sludge hopper, a water distribution channel, a water outlet channel and a three-phase separator, the sludge hopper is connected with the tank body, and a gap is formed between the sludge hopper and the bottom of the aerobic sedimentation tank; the water distribution channel is used for conveying sewage outside the sludge hopper into the sludge hopper; the three-phase separator is arranged at the top of the sludge hopper, and the water outlet part of the three-phase separator is communicated with the water outlet channel;
one end of the sludge return pipe is communicated with the sludge hopper, and the other end of the sludge return pipe is communicated with the anaerobic tank; the mixed liquid return pipe is used for conveying the sewage outside the sludge hopper to the anoxic tank.
In one embodiment of the invention, a plurality of perforated pipes and a plurality of sludge branch pipes are further arranged in the sludge hopper, the plurality of sludge branch pipes correspond to and are communicated with the plurality of perforated pipes one by one, and the plurality of sludge branch pipes are communicated with the sludge return pipe.
In one embodiment of the invention, the sludge hopper is provided with a sludge discharge pipe for conveying sludge to the sludge anaerobic digester.
Based on the above purpose, the embodiment of the present application further provides a high concentration organic wastewater treatment process, which is applicable to the above annular biochemical tank, and the process includes:
introducing sewage into an adsorption sedimentation tank, introducing the sewage treated by the adsorption sedimentation tank into an anaerobic tank, and introducing the sewage treated by the anaerobic tank into an anoxic tank; the sludge treated by the adsorption sedimentation tank enters a sludge anaerobic digestion tank, and supernatant treated by the sludge anaerobic digestion tank flows back to the anoxic tank; the sewage treated by the anoxic tank enters an aerobic tank, and the sewage treated by the aerobic tank enters an aerobic sedimentation tank; part of the sewage treated by the aerobic sedimentation tank flows back to the anoxic tank, and the sludge treated by the aerobic sedimentation tank enters the anaerobic tank and the sludge anaerobic digestion tank respectively.
The invention has the beneficial effects that:
in summary, the annular biochemical tank provided by the embodiment can meet high water inflow load and better denitrification and dephosphorization effects at the same time, can effectively reduce the tank volume of the biochemical tank, is provided with the annular tank body and good water flow state, and is vertically arranged with the adsorption sedimentation tank and the aerobic tank in a superposed manner, so that the floor area is reduced, and the pipeline connection is reduced by opening holes on the tank body, so that the head loss is reduced; the pool body is of an integrated structure, namely a plurality of functional pools are integrated together and are combined to be built, the structure is compact, the occupied area is small, land resources are saved, and meanwhile, the on-site operation management is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic diagram of a first perspective view of a circular biochemical pool provided herein;
FIG. 2 is a schematic diagram of a second perspective view of the annular biochemical pool provided herein;
FIG. 3 is a schematic structural diagram of a third perspective view of the annular biochemical pool provided by the present application.
Icon:
001-cell body; 011-the tank bottom wall; 0111-raw water inlet; 012-a first fence; 0121-first inlet; 013-a second fence; 0131-a third inlet; 014-third fence; 015-a first retaining wall; 0151-a second inlet; 016-second retaining wall; 0161-a fourth inlet; 002-a first annular walkway plate; 003-a second annular walkway plate; 004-bar-shaped walkway plates; 005-ladder step; 100-an adsorption sedimentation tank; 110-a first constant diameter cavity section; 120-a variable diameter cavity section; 130-a second constant diameter cavity section; 140-a first aeration system; 150-ring type mud bucket; 160-three phase separation system; 161-a first three-phase separator; 162-a water outlet groove; 163-a first endless triangular separation belt; 200-an anaerobic tank; 300-an anoxic pond; 400-an aerobic tank; 410-a second aeration system; 500-aerobic sedimentation tank; 510-a third aeration system; 520-sludge sedimentation screen; 521-a sludge hopper; 522-distributing channel; 523-water outlet channel; 524-a second three-phase separator; 525-a second triangular separation zone; 526-perforated pipes; 527-sludge branch pipe; 600-vertical shaft agitator; 700-a sludge return pipe; 800-mixed liquid return pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the application is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing and simplifying the description, but does not indicate or imply that the ring-shaped biochemical pool or the element which is indicated must have a specific orientation, be constructed in a specific orientation and be operated, and thus cannot be understood as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Examples
Referring to fig. 1 and fig. 2, the present embodiment provides an annular biochemical pool, which includes a pool body 001, wherein the pool body 001 includes a pool bottom wall 011, and a first enclosure 012, a second enclosure 013, a third enclosure 014, two first retaining walls 015, and two second retaining walls 016 connected to the pool bottom wall 011. Bottom of pool wall 011 is circular, and first enclose that fender 012, second enclose fender 013 and third enclose fender 014 and be ring shape and coaxial setting, the first axis that encloses fender 012 and the axis collineation of bottom of pool wall 011. Obviously, in other embodiments, the cell body 001 may be provided in other ring-shaped structures, and is not limited to a ring shape. The area surrounded by the first enclosure 012 is a central area, and the central area is an adsorption sedimentation tank. First fender 012 of enclosing is located the second and encloses in the region that fender 013 encloses, and first fender 012 and the second encloses and forms first annular region between fender 013, and two first barricades 015 are all located first fender 012 and the second of enclosing and are enclosed between fender 013 to inject anaerobism pond 200 and the oxygen deficiency pond 300 that arrange and communicate in the circumference of first fender 012 jointly. That is, both the first retaining walls 015 are positioned in the first annular region, and the first annular region is divided to form the independent anaerobic tank 200 and the anoxic tank 300. The anaerobic tank 200 is communicated with the adsorption sedimentation tank. The second fence 013 is located in an area surrounded by the third fence 014, a second annular area is formed between the second fence 013 and the third fence 014, and the two second retaining walls 016 are arranged between the second fence 013 and the third fence 014 so as to jointly define the aerobic tank 400 and the aerobic sedimentation tank 500 which are circumferentially arranged and communicated on the second fence 013. That is, the two second retaining walls 016 are located in the second annular region, and the second annular region is divided to form the independent aerobic tank 400 and the aerobic sedimentation tank 500. The anoxic tank 300 is communicated with the aerobic tank 400; the aerobic sedimentation tank 500 is communicated with the anaerobic tank 200 through a sludge return pipe 700; the aerobic sedimentation tank 500 is communicated with the anoxic tank 300 through a mixed liquid return pipe 800.
In this embodiment, optionally, for the management of being convenient for, be provided with the pavement system at the top of pond body 001, the pavement system passes through the ladder step 005 with ground and is connected, and the pavement system is used for supplying operation personnel or mechanical equipment walking to do benefit to the behavior of the processing condition of sewage and each equipment in observing pond body 001.
Please refer to fig. 2, optionally, the walkway system includes a first annular walkway plate 002, a second annular walkway plate 003, and two strip-shaped walkway plates 004, the first annular walkway plate 002 and the second annular walkway plate 003 are respectively connected to the tops of the second surrounding barrier 013 and the third surrounding barrier 014, the two strip-shaped walkway plates 004 are arranged in a crossing manner, one end of each strip-shaped walkway plate 004 is connected to the second surrounding barrier 013, and the other end crosses the second surrounding barrier 013 and is connected to the third surrounding barrier 014. Further, two strip-shaped walkway plates 004 are arranged perpendicularly across.
In this embodiment, optionally, the inner bottom wall of the adsorption sedimentation tank protrudes downward in the depth direction of the tank body 001 beyond the inner bottom wall of the anaerobic tank 200, the inner bottom wall of the anoxic tank 300, the inner bottom wall of the aerobic tank 400, and the inner bottom wall of the aerobic sedimentation tank 500, wherein the inner bottom wall of the anaerobic tank 200, the inner bottom wall of the anoxic tank 300, the inner bottom wall of the aerobic tank 400, and the inner bottom wall of the aerobic sedimentation tank 500 are located in the same horizontal plane. The first fender 012 of enclosing is last be provided with the raw water import 0111 that adsorbs the sedimentation tank intercommunication, and the influent direction of raw water import 0111 and the first fender 012 of enclosing are tangent and are located the below in anaerobism pond 200, oxygen deficiency pond 300, good oxygen pond 400 and good oxygen sedimentation tank 500.
With reference to fig. 1, the adsorption settling tank further includes a first constant diameter cavity section 110, a variable diameter cavity section 120, and a second constant diameter cavity section 130 arranged from bottom to top in the depth direction, and cross-sectional profiles of the first constant diameter cavity section 110, the variable diameter cavity section 120, and the second constant diameter cavity section 130 are all circular. The inner diameter of the variable diameter cavity section 120 gradually increases in the direction from the first constant diameter cavity section 110 to the second constant diameter cavity section 130, the included angle between the peripheral wall of the variable diameter cavity section 120 and the horizontal plane is α, the value range of α is 120 ° to 130 °, for example, α may be 120 °, 125 ° or 130 °. The first constant diameter cavity section 110 is an adsorption area, the adsorption area is provided with a first aeration system 140 and an annular sludge discharge hopper 150, and the annular sludge discharge hopper 150 is used for conveying sludge to the sludge anaerobic digestion tank. The first aeration system 140 is disposed at the bottom of the adsorption zone, the annular sludge discharge hopper 150 is disposed around the first aeration system 140, the annular sludge discharge hopper 150 is conical, and an included angle β between an outer circumferential surface of the annular sludge discharge hopper 150 and an inner circumferential surface of the first constant diameter cavity section 110 is between 30 ° and 40 °, for example, an included angle β between an outer circumferential surface of the annular sludge discharge hopper 150 and an inner circumferential surface of the first constant diameter cavity section 110 is 30 °, 35 ° or 40 °. The second equal-diameter cavity section 130 and the variable-diameter cavity section 120 jointly form a three-phase separation area; the three-phase separation zone is provided with an adsorption settling tank 100 which is communicated with an anaerobic tank 200 through a water outlet part of a three-phase separation system 160.
The three-phase separation system 160 includes two sets of first three-phase separators 161, a water outlet tank 162 and a first annular triangular separation belt 163, and the two sets of first three-phase separators 161 are arranged in a staggered manner in the depth direction of the adsorption sedimentation tank 100. The water outlet portion of the first three-phase separator 161 is communicated with the water outlet groove 162, the water outlet groove 162 is an annular groove, the water outlet groove 162 is located at the top of the adsorption sedimentation tank 100, a first inlet 0121 is arranged on the first enclosure 012 close to the top of the tank body 001, and the first inlet 0121 is communicated with the water outlet groove 162 and used for introducing sewage into the anaerobic tank 200. The first annular triangular separation band 163 is secured to the inner circumferential surface of the second radiused cavity section 130. It should be understood that, in other embodiments, the water outlet tank 162 is not limited to be an annular tank, and the sewage separated by the first three-phase separator 161 can be delivered to the anaerobic tank 200 through the first inlet 0121. In addition, the first three-phase separator 161 is used for separating the sewage from the raw water inlet 0111 into gas, mixed liquid and sludge, and the sludge is precipitated at the bottom of the adsorption and sedimentation tank and discharged to the sludge anaerobic digestion tank through the annular sludge discharge hopper 150. The gas is exhausted through the exhaust pipe, and the mixed liquid enters the water outlet tank 162 and enters the anaerobic tank 200 through the first inlet 0121 for further treatment. So, the adsorption and sedimentation tank possesses the multiple functions of adsorption and sludge sedimentation, namely combines the adsorption and sedimentation tank 100 and the sedimentation tank, and the two are arranged in a longitudinal superposition manner, thereby reducing the occupied area.
It should be noted that, an outlet weir is disposed outside the outlet groove 162 for collecting the outlet water uniformly.
Referring to any of fig. 1-3, in the present embodiment, a vertical shaft agitator 600 is optionally installed in the anaerobic tank 200, and the vertical shaft agitator 600 is fixed on a strip-shaped walkway plate 004. Further, one of the two first retaining walls 015 enclosing the anaerobic tank 200 is provided with a second inlet 0151, the second inlet 0151 is arranged close to the lower part of the tank body 001, and the second inlet 0151 is communicated with the anaerobic tank 200 and the anoxic tank 300.
In this embodiment, optionally, a plurality of vertical shaft stirrers 600 are disposed in the anoxic tank 300, for example, three vertical shaft stirrers 600 are disposed in the anoxic tank 300, the three vertical shaft stirrers 600 are arranged at intervals in the circumferential direction of the second enclosure 013, one of the three vertical shaft stirrers 600 is connected to one strip-shaped walkway plate 004, and the other two vertical shaft stirrers are connected to the other strip-shaped walkway plate 004. Further, a third inlet 0131 is formed in the position, close to the top of the tank body 001, of the second enclosure 013, and the third inlet 0131 is communicated with the anoxic tank 300 and the aerobic tank 400.
In this embodiment, optionally, the bottom of the aerobic tank 400 is provided with a second aeration system 410. Further, one of the two second retaining walls 016 is provided with a fourth inlet 0161, the fourth inlet 0161 is close to the lower part of the tank body 001, and the fourth inlet 0161 is communicated with the aerobic tank 400 and the aerobic sedimentation tank 500.
In this embodiment, optionally, a third aeration system 510 and a sludge sedimentation filter 520 are disposed in the aerobic sedimentation tank 500. The third aeration system 510 is arranged at the bottom of the aerobic sedimentation tank 500. The sludge sedimentation screen 520 comprises a sludge hopper 521, a distribution channel 522, a water outlet channel 523, a second three-phase separator 524 and a second triangular separation belt 525. The sludge bucket 521 is approximately funnel-shaped, the sludge bucket 521 is connected with the tank body 001, the sludge bucket 521 is spaced from the bottom of the aerobic sedimentation tank 500, and the third aeration system 510 is positioned outside the sludge bucket 521 and between the sludge bucket 521 and the inner bottom wall of the aerobic sedimentation tank 500. The water distribution channel 522 is used for conveying sewage outside the sludge bucket 521 to the sludge bucket 521; the second three-phase separator 524 is disposed on the top of the sludge bucket 521, and the water outlet portion of the second three-phase separator 524 is communicated with the water outlet channel 523, so that water discharged from the water outlet channel 523 can be directly discharged to the external environment. The second v-belt 525 is fixed to the inner circumferential surface of the sludge bucket 521. One end of the sludge return pipe 700 is communicated with the sludge hopper 521, the other end is communicated with the anaerobic tank 200, the sludge is returned to the anaerobic tank 200 in a gas stripping mode, and the residual sludge in the sludge sedimentation screen 520 is discharged to the sludge anaerobic digestion tank through a sludge discharge pipe. The mixed liquid return pipe 800 is used for conveying the sewage outside the sludge bucket 521 to the anoxic tank 300. In other words, the sludge bucket 521 is arranged in the aerobic sedimentation tank 500, the inside of the sludge bucket 521 is a sludge area, the outside of the sludge bucket 521 and the inner tank wall of the aerobic sedimentation tank 500 form a sewage area, water in the aerobic tank 400 enters the sewage area from the fourth inlet 0161, after aeration treatment is carried out at the bottom, the sewage flows upwards and enters the second three-phase separator 524 from the water distribution channel 522, the sewage is separated into gas, liquid and sludge through the second three-phase separator 524, the sludge is settled in the sludge bucket 521, and the liquid can be directly discharged from the water outlet channel 523. That is, the aerobic sedimentation tank 500 combines the functions of the aerobic tank 400 and the sedimentation tank, and is an integrated unit, vertically stacked and arranged, and the floor area is small.
Further, still be equipped with many perforated pipes 526 and many mud branch pipes 527 in the sludge hopper 521, many mud branch pipes 527 and many perforated pipes 526 one-to-one and intercommunication, many mud branch pipes 527 all communicate with mud back flow 700.
It should be noted that the sludge settling screens 520 are arranged in a plurality of sets, for example, in this embodiment, the sludge settling screens 520 are arranged in four sets, each set is configured with a pair of perforated pipes 526 and sludge branch pipes 527, and the sludge produced by the sludge settling screens 520 of the plurality of sets is collected into the sludge return pipe 700 and then returned to the anaerobic tank 200 by way of air stripping.
The treatment process of the annular biochemical tank provided by the embodiment is as follows, in other words, the embodiment also provides a treatment process of high-concentration organic wastewater based on the annular biochemical tank:
introducing the sewage into an adsorption sedimentation tank, introducing the sewage treated by the adsorption sedimentation tank into an anaerobic tank 200, and introducing the sewage treated by the anaerobic tank 200 into an anoxic tank 300; the sludge treated by the adsorption sedimentation tank enters a sludge anaerobic digestion tank, and supernatant treated by the sludge anaerobic digestion tank flows back to the anoxic tank 300; the sewage treated by the anoxic tank 300 enters the aerobic tank 400, and the sewage treated by the aerobic tank 400 enters the aerobic sedimentation tank 500; part of the sewage treated by the aerobic sedimentation tank 500 flows back to the anoxic tank 300, and the sludge treated by the aerobic sedimentation tank 500 enters the anaerobic tank 200 and the sludge anaerobic digestion tank respectively.
Specifically, the first stage: raw water enters the adsorption sedimentation tank 100 from a raw water inlet 0111 in a tangential direction, is fully mixed with sludge in the adsorption sedimentation tank 100 under the action of air disturbance and stirring blown out by the first aeration system 140 at the bottom, mainly takes the biological flocculation adsorption effect as a main effect in the adsorption sedimentation tank 100, microorganisms adsorb most of organic matters which are difficult to degrade outside the microorganisms by using extracellular enzymes, more than half of organic substances in the sewage are quickly removed in a sludge discharge adsorption mode, and a small part of organic matters enter the microorganisms and are utilized and proliferated by the microorganisms. In the three-phase separation zone, gas, water and sludge are separated by the first three-phase separator 161, water flows into the anaerobic tank 200 through the water outlet groove 162, gas is discharged through the exhaust pipe at the upper part of the first three-phase separator 161, the adsorbed sludge is discharged to the sludge anaerobic digestion tank through the annular sludge discharge hopper 150, the sludge supernatant subjected to anaerobic digestion contains a large amount of easily degradable organic matters, and the sludge supernatant flows back to the anoxic tank 300 to be used as a supplementary carbon source for denitrification.
And a second stage: sewage enters the anaerobic tank 200 through the first inlet 0121, returned sludge is discharged from the top of the anaerobic tank 200 through a sludge branch pipe 527 and a sludge return pipe 700 arranged in the aerobic sedimentation tank 500 in a gas stripping mode, and under the stirring and mixing action of the vertical shaft stirrer 600, the concentration of organic matters is reduced and phosphorus is released through the adsorption action of microorganisms, so that the concentration of phosphorus in the sewage is reduced. After the reaction in the anaerobic tank 200 is completed, the sewage is discharged into the anoxic tank 300 through the second inlet 0151 at the lower part of the anaerobic tank 200.
And a third stage: sewage enters the anoxic tank 300 through the second inlet 0151, mixed liquor reflows and is discharged into the anoxic tank 300 through a mixed liquor backflow pipe 800 arranged in the aerobic sedimentation tank 500 in a gas stripping mode, supernatant of the sludge anaerobic digestion tank reflows to the anoxic tank 300, water flows in the reverse direction, and the vertical shaft stirrer 600 stirs in the forward direction. Obviously, the water flow and the vertical shaft agitator 600 may be in opposite directions, and are not limited to the above limitations. In the anoxic tank 300, the denitrifying bacteria use the organic matters in the sewage and the organic matters in the supernatant of the sludge anaerobic digestion tank as carbon sources to reduce nitrate nitrogen and nitrite nitrogen in the reflux mixed flow into nitrogen and release the nitrogen into the air, so that the concentration of the nitrate nitrogen is greatly reduced, and the change of phosphorus is small. After the reaction in the anoxic tank 300 is completed, the wastewater is discharged from a third inlet 0131 at the upper part of the tank body.
A fourth stage: sewage enters the aerobic tank 400 through the third inlet 0131, water flows in the aerobic tank 400 in a clockwise manner, organic matters are degraded by microorganisms under the action of aeration equipment, organic nitrogen is firstly aminated to form ammonia nitrogen and then is nitrified, the concentrations of the organic nitrogen and the ammonia nitrogen are obviously reduced, the concentrations of nitrite nitrogen and nitrate nitrogen are increased along with the increase of the concentration of the nitrite nitrogen and the nitrate nitrogen in the nitrification process, and phosphorus is rapidly reduced along with the excessive intake of phosphorus-accumulating bacteria. After the aerobic reaction is finished, the wastewater is discharged from a fourth inlet 0161 at the lower part.
The fifth stage: the sewage enters the aerobic sedimentation tank 500 through the fourth inlet 0161, the bottom of the aerobic sedimentation tank is still an aerobic zone, the function of the aerobic sedimentation tank is the same as that of the aerobic sedimentation tank 400, and the mixed liquor in the aerobic sedimentation tank 500 flows back to the anoxic tank 300 through the mixed liquor return pipe 800. The upper part of the aerobic sedimentation tank 500 is provided with a sludge sedimentation screen 520, the sludge, the gas and the water are separated by the sludge sedimentation screen 520, the water is discharged from the water outlet groove 162, the sludge is collected in a sludge hopper, the sludge is refluxed to the anaerobic tank 200 in an air stripping mode, the excess sludge in the sludge sedimentation screen 520 is also discharged to the sludge anaerobic digestion tank from the sludge hopper 521, and carbon source recovery and sludge reduction are carried out in the anaerobic digestion tank together with the adsorbed sludge discharged from the adsorption sedimentation tank 100.
The annular biochemical pool and the treatment process thereof provided by the embodiment have at least the following advantages:
1. can still ensure higher organic matter removal, nitrogen and phosphorus removal efficiency under higher water inlet load.
2. The structure design is ingenious, all structures form a ring shape, the occupied area is small, the flow state is good, the head loss is small, and the field management is facilitated.
3. The adsorption and sedimentation tank 100 and the sedimentation tank are integrated through the first three-phase separator 161, the structure is simple, the functions are diversified, and the occupied area is small.
4. The sludge sedimentation screening device 520 is arranged in the aerobic sedimentation tank 500 to form an arrangement mode of aerobic sedimentation at the lower part and upper part, so that the tank capacity is reasonably utilized, and the investment is saved.
5. And the sludge reflux and the mixed liquid reflux both adopt air stripping modes, so that power equipment is reduced, and the construction investment and the equipment maintenance amount are reduced.
6. The supernatant of the sludge anaerobic digestion tank flows back to the anoxic tank 300 to provide a denitrification carbon source for the anoxic tank 300, and the removal of total nitrogen is promoted.
7. The adsorbed sludge discharged from the adsorption and precipitation tank 100 and the excess sludge discharged from the sludge precipitation screening device 520 are sufficiently digested in the sludge anaerobic digestion tank to achieve the purpose of sludge reduction, the supernatant rich in easily degradable organic matters flows back to the anoxic tank 300 to provide a denitrification carbon source for the anoxic tank 300 and promote the removal of total nitrogen, and the carbon neutralization concept is fully embodied by the above treatment mode and thought.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An annular biochemical pond for treating high-concentration organic wastewater, comprising:
the pool comprises a pool body, wherein the pool body comprises a pool bottom wall, and a first enclosing barrier, a second enclosing barrier, a third enclosing barrier, two first retaining walls and two second retaining walls which are all connected with the pool bottom wall; the area enclosed by the first enclosure is an adsorption sedimentation tank, the first enclosure is positioned in the area enclosed by the second enclosure, and the second enclosure is positioned in the area enclosed by the third enclosure; the two first retaining walls are arranged between the first enclosure and the second enclosure to jointly define an anaerobic pool and an anoxic pool which are circumferentially arranged and communicated with each other on the first enclosure, and the anaerobic pool is communicated with the adsorption sedimentation pool; the two second retaining walls are arranged between the second enclosure and the third enclosure to jointly define an aerobic tank and an aerobic sedimentation tank which are circumferentially arranged and communicated with the second enclosure; the anoxic tank is communicated with the aerobic tank; the aerobic sedimentation tank is communicated with the anaerobic tank through a sludge return pipe; the aerobic sedimentation tank is communicated with the anoxic tank through a mixed liquid return pipe.
2. The annular biochemical pool of claim 1, wherein:
the inner bottom wall of the adsorption sedimentation tank protrudes downwards from the inner bottom walls of the anaerobic tank, the anoxic tank, the aerobic tank and the aerobic sedimentation tank in the depth direction of the tank body; the first fender of enclosing go up be provided with the raw water import of absorption sedimentation tank intercommunication, the water inlet direction of raw water import with the first fender of enclosing is tangent and is located the anaerobism pond oxygen deficiency pond good oxygen pond and the below of good oxygen sedimentation tank.
3. The annular biochemical pool of claim 1, wherein:
the adsorption sedimentation tank comprises a first constant diameter cavity section, a variable diameter cavity section and a second constant diameter cavity section which are arranged from bottom to top in the depth direction of the adsorption sedimentation tank, and the inner diameter of the variable diameter cavity section is gradually increased from the first constant diameter cavity section to the second constant diameter cavity section; the first constant-diameter cavity section is an adsorption area, the adsorption area is provided with a first aeration system and an annular sludge discharge hopper, and the annular sludge discharge hopper is used for conveying sludge to a sludge anaerobic digestion tank; the second constant-diameter cavity section and the variable-diameter cavity section jointly form a three-phase separation area; the three-phase separation zone is provided with a three-phase separation system, and the adsorption and sedimentation tank is communicated with the anaerobic tank through a water outlet part of the three-phase separation system.
4. The annular biochemical pool of claim 1, wherein:
and vertical shaft stirrers are arranged in the anaerobic tank and the anoxic tank.
5. The annular biochemical pool of claim 1, wherein:
the annular biochemical pool further comprises a first annular walkway plate, a second annular walkway plate and two strip walkway plates, wherein the first annular walkway plate and the second annular walkway plate are respectively connected with the second surrounding baffle and the third surrounding baffle at the top, the two strip walkway plates are arranged in a crossed manner, each strip walkway plate is provided with one end connected with the second surrounding baffle and the other end crossed with the second surrounding baffle and the third surrounding baffle.
6. The annular biochemical pool of claim 1, wherein:
the aerobic tank is internally provided with a second aeration system, and the aerobic sedimentation tank is internally provided with a third aeration system.
7. The annular biochemical pool of claim 6, wherein:
the aerobic sedimentation tank is also internally provided with a sludge sedimentation screening device, the sludge sedimentation screening device comprises a sludge hopper, a water distribution channel, a water outlet channel and a three-phase separator, the sludge hopper is connected with the tank body, and the sludge hopper is spaced from the bottom of the aerobic sedimentation tank; the water distribution channel is used for conveying sewage outside the sludge hopper into the sludge hopper; the three-phase separator is arranged at the top of the sludge hopper, and a water outlet part of the three-phase separator is communicated with the water outlet channel;
one end of the sludge return pipe is communicated with the sludge hopper, and the other end of the sludge return pipe is communicated with the anaerobic tank; the mixed liquid return pipe is used for conveying the sewage outside the sludge hopper to the anoxic tank.
8. The annular biochemical pool of claim 7, wherein:
still be equipped with many perforated pipes and many mud branch pipes in the sludge bucket, many mud branch pipes with many perforated pipe one-to-ones and intercommunication, many mud branch pipes all with mud back flow intercommunication.
9. The annular biochemical pool of claim 7, wherein:
the sludge bucket is provided with a sludge discharge pipe, and the sludge discharge pipe is used for conveying sludge to the sludge anaerobic digestion tank.
10. A process for treating high-concentration organic wastewater, which is applied to the annular biochemical pond of any one of claims 1 to 9, and comprises the following steps:
introducing sewage into the adsorption and sedimentation tank, introducing the sewage treated by the adsorption and sedimentation tank into the anaerobic tank, and introducing the sewage treated by the anaerobic tank into the anoxic tank; the sludge treated by the adsorption sedimentation tank enters a sludge anaerobic digestion tank, and supernatant treated by the sludge anaerobic digestion tank flows back to the anoxic tank; the sewage treated by the anoxic tank enters the aerobic tank, and the sewage treated by the aerobic tank enters the aerobic sedimentation tank; and part of the sewage treated by the aerobic sedimentation tank flows back to the anoxic tank, and the sludge treated by the aerobic sedimentation tank enters the anaerobic tank and the sludge anaerobic digestion tank respectively.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769211A (en) * | 2004-11-04 | 2006-05-10 | 中国科学院生态环境研究中心 | Integrative bioreactor for treating refuse leachate |
| KR101010053B1 (en) * | 2009-08-18 | 2011-01-20 | 주식회사 드림이엔지 | Apparatus for treating wastewater |
| CN102351375A (en) * | 2011-07-07 | 2012-02-15 | 安徽亚泰环境工程技术有限公司 | Integrated processing apparatus for industrial wastewater processing |
| CN205382058U (en) * | 2016-01-08 | 2016-07-13 | 袁忠伟 | Miniature integrated domestic sewage treatment equipment |
| CN205387501U (en) * | 2016-03-03 | 2016-07-20 | 上海合源环境科技有限公司 | Biological powdered activated carbon adsorption of integration deposits device |
| CN208454623U (en) * | 2018-07-20 | 2019-02-01 | 湖南惟创环境科技有限公司 | Pond is combined in the sewage treatment of biologic integration |
| CN212770068U (en) * | 2020-06-30 | 2021-03-23 | 苏州道远环境技术有限公司 | Aerobic biological purification tower |
| CN216445087U (en) * | 2022-01-04 | 2022-05-06 | 北控水务(中国)投资有限公司 | Annular biochemical pool |
-
2022
- 2022-01-04 CN CN202210002762.XA patent/CN114314837A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769211A (en) * | 2004-11-04 | 2006-05-10 | 中国科学院生态环境研究中心 | Integrative bioreactor for treating refuse leachate |
| KR101010053B1 (en) * | 2009-08-18 | 2011-01-20 | 주식회사 드림이엔지 | Apparatus for treating wastewater |
| CN102351375A (en) * | 2011-07-07 | 2012-02-15 | 安徽亚泰环境工程技术有限公司 | Integrated processing apparatus for industrial wastewater processing |
| CN205382058U (en) * | 2016-01-08 | 2016-07-13 | 袁忠伟 | Miniature integrated domestic sewage treatment equipment |
| CN205387501U (en) * | 2016-03-03 | 2016-07-20 | 上海合源环境科技有限公司 | Biological powdered activated carbon adsorption of integration deposits device |
| CN208454623U (en) * | 2018-07-20 | 2019-02-01 | 湖南惟创环境科技有限公司 | Pond is combined in the sewage treatment of biologic integration |
| CN212770068U (en) * | 2020-06-30 | 2021-03-23 | 苏州道远环境技术有限公司 | Aerobic biological purification tower |
| CN216445087U (en) * | 2022-01-04 | 2022-05-06 | 北控水务(中国)投资有限公司 | Annular biochemical pool |
Non-Patent Citations (1)
| Title |
|---|
| 王建芳;赵庆良;刘志刚;林佶侃;: "好氧-沉淀-厌氧工艺剩余污泥减量化的影响因素", 中国环境科学, no. 05, 15 May 2008 (2008-05-15), pages 45 - 50 * |
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