CN216584400U - Reaction system for culturing continuous flow aerobic granular sludge - Google Patents
Reaction system for culturing continuous flow aerobic granular sludge Download PDFInfo
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- CN216584400U CN216584400U CN202220039901.1U CN202220039901U CN216584400U CN 216584400 U CN216584400 U CN 216584400U CN 202220039901 U CN202220039901 U CN 202220039901U CN 216584400 U CN216584400 U CN 216584400U
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Abstract
A reaction system for culturing continuous flow aerobic granular sludge relates to the technical field of sewage treatment. The reaction system for culturing the continuous flow aerobic granular sludge comprises an anaerobic device, an anoxic device, an aerobic device and a precipitation device which are sequentially communicated; one or more of the anaerobic device, the anoxic device and the aerobic device adopt a baffling structure; the baffling structure comprises a baffling pool and a baffling piece; the flow blocking piece is connected with the deflection pool and divides the deflection pool into a deflection ascending area and a deflection settling area; the tail end of the baffling rising area is communicated with the head end of the baffling settling area; a sedimentation liquid outlet pipe is arranged on the side wall of the sedimentation device, and an outer liquid return pipe communicated with the anaerobic device is arranged at the bottom of the sedimentation device; the aerobic device is provided with an inner liquid return pipe communicated with the anoxic device. The utility model aims at providing a cultivate reaction system of good oxygen granule mud of continuous flow to obtain suitable hydraulic shear force to a certain extent.
Description
Technical Field
The utility model relates to a sewage treatment technical field particularly, relates to a cultivate reaction system of good oxygen granule mud of continuous flow.
Background
The aerobic granular sludge generally refers to a biological aggregate produced by the self-flocculation of microorganisms under proper operating conditions, and because the aerobic granular sludge has a certain particle size, the mass transfer of dissolved oxygen is limited, and anaerobic, anoxic and aerobic environments required by the microorganisms are formed in single particles, so that the function of synchronous nitrification and denitrification or denitrification and phosphorus removal is realized. Compared with the traditional activated sludge method, the aerobic granular sludge technology has the advantages of good sedimentation performance, strong impact load resistance, low energy consumption, low medicine consumption and the like, thereby being widely researched and approved at home and abroad.
The aerobic granular sludge process needs to be operated under quite strict conditions and is influenced by a plurality of factors, such as hydraulic shearing force, settling time, sludge load, external environments (such as temperature and pH), inoculated sludge and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cultivate reaction system of good oxygen granule mud of continuous flow to obtain suitable hydraulic shear force to a certain extent.
In order to achieve the above object, the present invention provides the following technical solutions:
a reaction system for culturing continuous flow aerobic granular sludge comprises an anaerobic device, an anoxic device, an aerobic device and a precipitation device which are sequentially communicated;
one or more of the anaerobic device, the anoxic device and the aerobic device adopts a baffling structure;
the baffling structure comprises a baffling pool and a baffling piece; the flow blocking piece is connected with the baffling pool and divides the baffling pool into a baffling ascending area and a baffling settling area; the tail end of the baffling rising area is communicated with the head end of the baffling settling area;
a sedimentation liquid outlet pipe is arranged on the side wall of the sedimentation device, and an outer liquid return pipe communicated with the anaerobic device is arranged at the bottom of the sedimentation device;
the aerobic device is provided with an inner liquid return pipe communicated with the anoxic device.
In any of the above technical solutions, optionally, the number of the precipitation liquid outlet pipes is multiple, and the multiple precipitation liquid outlet pipes are sequentially arranged at intervals from top to bottom; and a precipitation liquid outlet valve is arranged on each precipitation liquid outlet pipe. Through a plurality of sediment drain pipes that the sediment device set up, can be according to the actual effect of subsiding of mud, select suitable sediment drain pipe to carry out the mud as the mud discharge mouth, can eliminate the mud of slight granule and make the mud of large granule continue to stay in the reaction system who cultivates the good oxygen granule mud of continuous flow to form stable and the granule mud that settleability is good fast.
In any of the above technical solutions, optionally, the number of the precipitation liquid outlet pipes is 4;
or the precipitation liquid outlet valve is an electromagnetic ball valve;
or the outlet ends of all the precipitation liquid outlet pipes are communicated with a precipitation liquid outlet converging pipe; the sedimentation liquid-outlet converging pipe is provided with a liquid-outlet pump.
In any of the above technical solutions, optionally, the flow velocity of the baffling rising zone is 15m/h-20 m/h.
In any of the above technical solutions, optionally, a ratio of a volume of the anaerobic apparatus, a volume of the anoxic apparatus, and a volume of the aerobic apparatus is 2:2: 4.
In any of the above embodiments, optionally, the anaerobic device comprises one or more anaerobic tanks; when the number of the anaerobic tanks is multiple, the anaerobic tanks are communicated in sequence;
the anoxic device comprises one or more anoxic tanks; when the number of the anoxic tanks is multiple, the multiple anoxic tanks are communicated in sequence;
the aerobic device comprises one or more aerobic tanks; when the number of the aerobic tanks is multiple, the multiple aerobic tanks are communicated in sequence.
In any of the above technical solutions, optionally, each of the anaerobic tanks adopts a baffling structure;
each anoxic tank adopts a baffling structure;
each aerobic tank adopts a baffling structure.
In any of the above technical solutions, optionally, the anaerobic tank is provided with a stirrer;
or the anoxic pond is provided with a stirrer;
or the aerobic tank is provided with an aeration disc.
In any of the above technical solutions, optionally, the dissolved oxygen concentration of the aerobic tank is controlled to be 2mg/L to 4 mg/L;
or the aeration disc is connected with an air compressor;
or the aeration disc is arranged in the baffling sedimentation area of the aerobic tank.
In any of the above technical solutions, optionally, a liquid inlet end of the anaerobic apparatus is connected to a liquid inlet pump;
the inner liquid return pipe is provided with an inner reflux pump; the outer liquid return pipe is provided with an outer reflux pump;
the flow rate of the inner reflux pump is 2-3 times of that of the liquid inlet pump, and/or the flow rate of the outer reflux pump is 1-1.5 times of that of the liquid inlet pump.
The beneficial effects of the utility model mainly lie in:
the utility model provides a cultivate reaction system of good oxygen granule mud of continuous flow, including anaerobism device, oxygen deficiency device, good oxygen device and sediment device, adopt the baffling structure through one or more among anaerobism device, oxygen deficiency device and the good oxygen device to make mud pass through the baffling structure through the hydraulic power in the upward plug flow effect of baffling ascending district and the gravity settling effect in baffling settling zone, obtain a suitable hydraulic power shearing force, thereby help forming granular sludge fast; the anaerobic device, the anoxic device, the aerobic device and the sedimentation device can obtain proper hydraulic shearing force through the outer liquid return pipe and the inner liquid return pipe, thereby further facilitating the rapid formation of granular sludge.
In order to make the aforementioned and other objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a reaction system for culturing continuous flow aerobic granular sludge according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the reaction system shown in FIG. 1 for cultivating a continuous flow aerobic granular sludge;
fig. 3 is a schematic structural diagram of a baffle structure according to an embodiment of the present invention.
Icon: 100-anaerobic devices; 110-an anaerobic tank; 120-a stirrer; 130-liquid inlet pump; 200-an anoxic device; 210-an anoxic tank; 300-an aerobic device; 310-an aerobic tank; 320-an aeration disc; 330-air compressor; 340-the trachea; 400-a precipitation unit; 410-settling the liquid outlet pipe; 411-a sediment effluent valve; 420-a liquid outlet pump; 500-a baffling structure; 510-a baffled riser region; 520-baffled settling zone; 530-baffle pool; 540 a flow blocking member; 600-granular sludge; 700-outer liquid return pipe; 710-external reflux pump; 800-inner liquid return pipe; 810-internal reflux pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
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 present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. 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.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Examples
The embodiment provides a reaction system for culturing continuous flow aerobic granular sludge; referring to fig. 1 to fig. 3, fig. 1 is a schematic structural diagram of a reaction system for culturing continuous flow aerobic granular sludge according to this embodiment, fig. 3 is a schematic structural diagram of a baffle structure according to this embodiment, and fig. 2 is an enlarged view of a portion of the reaction system for culturing continuous flow aerobic granular sludge shown in fig. 1, in which a sedimentation device 400 is shown for better clarity of the structure. The direction of the arrows on the air tube 340 shown in fig. 1 indicates the direction of air flow, and the other directions of the arrows shown in fig. 1-3 indicate the direction of water flow.
Referring to fig. 1 to fig. 3, the reaction system for culturing continuous flow aerobic granular sludge provided by the embodiment includes an anaerobic apparatus 100, an anoxic apparatus 200, an aerobic apparatus 300, and a sedimentation apparatus 400, which are connected in sequence.
One or more of the anaerobic apparatus 100, the anoxic apparatus 200 and the aerobic apparatus 300 employ a baffle structure 500; optionally, the anaerobic device 100, the anoxic device 200 and the aerobic device 300 all adopt a baffling structure 500, so that when sludge passes through the anaerobic device 100, the anoxic device 200 and the aerobic device 300, a proper hydraulic shearing force is obtained through the upward flow pushing effect of water power in the baffling ascending region 510 and the gravity settling effect in the baffling settling region 520, thereby facilitating the rapid formation of the more stable granular sludge 600 with good settling performance.
The baffle structure 500 includes a baffle tank 530 and a baffle 540; the baffle 540 is connected with the baffling pool 530, and the baffle 540 divides the baffling pool 530 into a baffling rising area 510 and a baffling settling area 520; the tail end of the baffled ascending region 510 is in communication with the head end of the baffled settling region 520.
The side wall of the settling device 400 is provided with a settling liquid outlet pipe 410, and the bottom of the settling device 400 is provided with an outer liquid return pipe 700 communicated with the anaerobic device 100.
The aerobic device 300 is provided with an inner liquid return pipe 800 communicated with the anoxic device 200.
The reaction system for culturing continuous flow aerobic granular sludge in the embodiment comprises an anaerobic device 100, an anoxic device 200, an aerobic device 300 and a sedimentation device 400, wherein a baffling structure 500 is adopted by one or more of the anaerobic device 100, the anoxic device 200 and the aerobic device 300, so that when the sludge passes through the baffling structure 500, a proper hydraulic shearing force is obtained through the upward flow pushing action of hydraulic power in a baffling ascending area 510 and the gravity settling action in a baffling settling area 520, thereby facilitating the rapid formation of granular sludge 600; through the outer and inner return pipes 700 and 800, the anaerobic apparatus 100, the anoxic apparatus 200, the aerobic apparatus 300, and the sedimentation apparatus 400 can obtain a proper hydraulic shearing force, thereby further contributing to the rapid formation of the granular sludge 600.
Referring to FIG. 3, in an alternative embodiment, the flow velocity in the baffle rise zone 510 is in the range of 15m/h to 20 m/h. For example, the flow velocity in the baffled riser 510 can be 15m/h, 16m/h, 18.5m/h, or 20m/h, or other values. The water flow rate in the baffling rising area 510 is kept between 15m/h and 20m/h by adjusting the inflow water quantity and the flow passing area.
Referring to fig. 1, in an alternative of this embodiment, the ratio of the volume of the anaerobic apparatus 100, the volume of the anoxic apparatus 200 and the volume of the aerobic apparatus 300 is 2:2: 4. The use of a 2:2:4 ratio of the volume of the anaerobic apparatus 100 to the volume of the anoxic apparatus 200 to the volume of the aerobic apparatus 300 is advantageous in that the anaerobic apparatus 100, the anoxic apparatus 200, the aerobic apparatus 300 and the sedimentation apparatus 400 can obtain a suitable hydraulic shear force, thereby facilitating the rapid formation of the granular sludge 600.
In an alternative of this embodiment, the anaerobic apparatus 100 includes one or more anaerobic tanks 110; as shown in fig. 1, the number of the anaerobic tanks 110 is 2.
Alternatively, when the number of the anaerobic tanks 110 is plural, the plurality of anaerobic tanks 110 are connected in series.
In an alternative of this embodiment, the anoxic device 200 comprises one or more anoxic tanks 210; as shown in fig. 1, the number of anoxic tanks 210 is 2.
Optionally, when there are a plurality of anoxic tanks 210, the plurality of anoxic tanks 210 are sequentially communicated.
In an alternative of this embodiment, the aerobic unit 300 comprises one or more aerobic tanks 310; as shown in FIG. 1, the number of the aerobic tanks 310 is 4.
Optionally, when there are a plurality of aerobic tanks 310, the plurality of aerobic tanks 310 are connected in sequence.
Optionally, the anaerobic tank 110, the anoxic tank 210 and the aerobic tank 310 have the same unit volume to reduce the construction cost of the reaction system for culturing the continuous flow aerobic granular sludge.
In an alternative of this embodiment, each anaerobic tank 110 employs a baffle structure 500; so that when the sludge passes through the anaerobic tank 110, a proper hydraulic shearing force is obtained through the upward flow pushing effect of the hydraulic power in the baffling rising area 510 and the gravity settling effect in the baffling settling area 520, thereby being helpful for quickly forming the granular sludge 600 with relatively stability and good settling performance.
In an alternative embodiment, each anoxic tank 210 employs a baffle structure 500; so that when the sludge passes through the anoxic tank 210, a proper hydraulic shearing force is obtained through the upward flow pushing effect of the hydraulic power in the baffling ascending area 510 and the gravity settling effect in the baffling settling area 520, thereby facilitating the rapid formation of the stable granular sludge 600 with good settling performance.
In an alternative embodiment, each aerobic tank 310 employs a baffle structure 500. So that when the sludge passes through the aerobic tank 310, a proper hydraulic shearing force is obtained through the upward flow pushing effect of the hydraulic power in the baffling rising area 510 and the gravity settling effect in the baffling settling area 520, thereby being helpful for quickly forming the granular sludge 600 with relatively stability and good settling performance.
Referring to fig. 1, in an alternative of the present embodiment, the anaerobic tank 110 is provided with a stirrer 120; through the agitator 120 so that the anaerobic tank 110 obtains a proper hydraulic shearing force. Optionally, the baffled settling zone 520 of the anaerobic tank 110 is provided with an agitator 120.
Referring to fig. 1, in an alternative embodiment, the anoxic tank 210 is provided with a stirrer 120; through the agitator 120 to obtain a suitable hydraulic shear force for the anoxic tank 210. Optionally, the baffled settling zone 520 of the anoxic tank 210 is provided with an agitator 120.
Referring to fig. 1, in an alternative embodiment, the aerobic tank 310 is provided with an aeration tray 320. The dissolved oxygen content of the aerobic tank 310 is increased by the aeration disk 320. Optionally, the baffled settling zone 520 of the aerobic tank 310 is provided with an aeration tray 320.
Referring to fig. 1, in an alternative embodiment, an air compressor 330 is connected to the aeration disk 320. The aeration of the aeration tray 320 is facilitated by an air compressor 330.
Optionally, an air compressor 330 is connected to the aeration tray 320 via an air pipe 340.
In the alternative of this embodiment, the dissolved oxygen concentration of the aerobic tank 310 is controlled to be 2mg/L-4 mg/L; for example, the concentration of dissolved oxygen in the aerobic tank 310 is controlled to be 2mg/L, 2.5mg/L, 3.3mg/L, or 4mg/L, or other values.
Referring to fig. 1, in an alternative embodiment, the liquid inlet end of the anaerobic apparatus 100 is connected with a liquid inlet pump 130; liquid is injected into the reaction system for culturing the continuous flow aerobic granular sludge by the liquid inlet pump 130.
Referring to fig. 1, in an alternative of the present embodiment, an internal liquid return pipe 800 is provided with an internal liquid return pump 810; the return of the liquid from the aerobic apparatus 300 to the anoxic apparatus 200 is accelerated to some extent by the internal return pump 810.
Referring to fig. 1, in an alternative of the present embodiment, an outer return pipe 700 is provided with an outer return pump 710; the reflux of the liquid from the settling device 400 to the anaerobic device 100 is accelerated to some extent by the external reflux pump 710.
In the alternative of this embodiment, the flow rate of the internal reflux pump 810 is 2-3 times of the flow rate of the liquid inlet pump 130, i.e. the internal reflux ratio of the sludge is 200% -300%.
In the alternative of this embodiment, the flow rate of the external reflux pump 710 is 1-1.5 times of the flow rate of the liquid inlet pump 130, i.e. the external reflux ratio of the sludge is 100% -150%.
Referring to fig. 1-3, in an alternative embodiment, the number of the precipitation liquid outlet pipes 410 is multiple, and multiple precipitation liquid outlet pipes 410 are sequentially arranged at intervals from top to bottom. Through from last to setting up a plurality of sediment drain pipes 410 down at interval in proper order, can open suitable sediment drain pipe 410 and carry out the row mud according to the actual effect of subsiding of mud.
Optionally, a sediment effluent valve 411 is disposed on each sediment effluent pipe 410.
Optionally, the sediment outflow valve 411 is an electromagnetic ball valve, so as to be electrically controlled.
Referring to fig. 2, in an alternative embodiment, the number of the precipitation effluent pipes 410 is 4; or other number. In the embodiment, four sedimentation liquid outlet pipes 410 are additionally arranged in the sedimentation device 400 to serve as four sludge discharge ports, and the proper sludge discharge ports are opened to discharge sludge through the actual sedimentation effect of the sludge, so that high selective pressure is provided, the sludge with slight small particles is gradually eliminated, and the sludge with large particles is continuously left in the reaction system for culturing the aerobic granular sludge of the continuous flow.
Referring to fig. 2, in an alternative embodiment, the outlet ends of all the precipitation liquid outlet pipes 410 are communicated with a precipitation liquid outlet confluence pipe; optionally, the sedimentation effluent joining pipe is provided with an effluent pump 420.
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 (10)
1. A reaction system for culturing continuous flow aerobic granular sludge is characterized by comprising an anaerobic device, an anoxic device, an aerobic device and a precipitation device which are sequentially communicated;
one or more of the anaerobic device, the anoxic device and the aerobic device adopts a baffling structure;
the baffling structure comprises a baffling pool and a baffling piece; the flow blocking piece is connected with the baffling pool and divides the baffling pool into a baffling ascending area and a baffling settling area; the tail end of the baffling rising area is communicated with the head end of the baffling settling area;
a sedimentation liquid outlet pipe is arranged on the side wall of the sedimentation device, and an outer liquid return pipe communicated with the anaerobic device is arranged at the bottom of the sedimentation device;
the aerobic device is provided with an inner liquid return pipe communicated with the anoxic device.
2. The reaction system for cultivating continuous flow aerobic granular sludge according to claim 1, wherein the number of the sedimentation liquid outlet pipes is plural, and the plural sedimentation liquid outlet pipes are arranged at intervals from top to bottom; and a precipitation liquid outlet valve is arranged on each precipitation liquid outlet pipe.
3. A reaction system for cultivating continuous flow aerobic granular sludge according to claim 2, wherein the number of said sedimentation outlets is 4;
or the precipitation liquid outlet valve is an electromagnetic ball valve;
or the outlet ends of all the precipitation liquid outlet pipes are communicated with a precipitation liquid outlet converging pipe; the sedimentation liquid-outlet converging pipe is provided with a liquid-outlet pump.
4. A reaction system for cultivating a continuous flow aerobic granular sludge according to claim 1, wherein the flow velocity of the baffled elevation zone is 15m/h to 20 m/h.
5. A reaction system for cultivating a continuous flow of aerobic granular sludge according to claim 1, wherein the ratio of the volume of the anaerobic means, the volume of the anoxic means and the volume of the aerobic means is 2:2: 4.
6. A reaction system for the cultivation of continuous flow aerobic granular sludge according to any of the claims 1 to 5, wherein the anaerobic means comprises one or more anaerobic tanks; when the number of the anaerobic tanks is multiple, the anaerobic tanks are communicated in sequence;
the anoxic device comprises one or more anoxic tanks; when the number of the anoxic tanks is multiple, the multiple anoxic tanks are communicated in sequence;
the aerobic device comprises one or more aerobic tanks; when the number of the aerobic tanks is multiple, the multiple aerobic tanks are communicated in sequence.
7. The reaction system for cultivating continuous flow aerobic granular sludge according to claim 6, wherein each of the anaerobic tanks adopts a baffled structure;
each anoxic tank adopts a baffling structure;
each aerobic tank adopts a baffling structure.
8. A reaction system for cultivating a continuous flow of aerobic granular sludge according to claim 7, wherein the anaerobic tank is provided with a stirrer;
or the anoxic pond is provided with a stirrer;
or the aerobic tank is provided with an aeration disc.
9. The reaction system for culturing the continuous flow aerobic granular sludge according to the claim 8, wherein the dissolved oxygen concentration of the aerobic tank is controlled to 2mg/L to 4 mg/L;
or the aeration disc is connected with an air compressor;
or the aeration disc is arranged in the baffling sedimentation area of the aerobic tank.
10. A reaction system for cultivating continuous flow aerobic granular sludge according to any of the claims 1 to 5, wherein the liquid inlet end of the anaerobic apparatus is connected with a liquid inlet pump;
the inner liquid return pipe is provided with an inner reflux pump; the outer liquid return pipe is provided with an outer reflux pump;
the flow rate of the inner reflux pump is 2-3 times of that of the liquid inlet pump, and/or the flow rate of the outer reflux pump is 1-1.5 times of that of the liquid inlet pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117228841A (en) * | 2023-11-16 | 2023-12-15 | 北京华益德环境科技有限责任公司 | Side-stream granulating continuous-flow aerobic granular sludge treatment device |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117228841A (en) * | 2023-11-16 | 2023-12-15 | 北京华益德环境科技有限责任公司 | Side-stream granulating continuous-flow aerobic granular sludge treatment device |
| CN117228841B (en) * | 2023-11-16 | 2024-02-09 | 北京华益德环境科技有限责任公司 | Side-stream granulating continuous-flow aerobic granular sludge treatment device |
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