Sewage treatment system

Abstract

The utility model discloses a sewage treatment system. The sewage treatment system comprises a first equipment module and a second equipment module, the first equipment module comprises an anoxic tank and a first contact oxidation tank which are communicated with each other, the anoxic tank is provided with a water inlet, and the second equipment module comprises a second contact oxidation tank, an MBR membrane tank, a clean water tank, a sludge tank and an equipment room which are communicated with each other. The second contact oxidation pond is communicated with the first contact oxidation pond through a communicating pipe, suspended fillers are respectively arranged in the first contact oxidation pond and the second contact oxidation pond, the clean water pond is provided with a water outlet, and the first equipment module and the second equipment module are detachably connected. The system can be directly replaced to different sewage treatment sites according to actual conditions, the whole sewage treatment system can be directly connected with water for use, the system does not need to be debugged and activated and can be directly connected for water for use, the system installation and replacement efficiency is extremely high, and the sewage treatment efficiency is also greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a sewage treatment system. Background Art

[0002] Most of the domestic sewage treatment in rural my country adopts decentralized integrated sewage treatment equipment, and the equipment with different water treatment volumes is designed according to the specific conditions of each village. The integrated equipment requires 15-30 days of commissioning and startup time to cultivate and domesticate activated sludge, and cannot be plug-and-play; and the treatment process mostly adopts conventional AAO and AO treatment processes, which are large in size, occupy a large area, have high processing costs, and low treatment efficiency; in actual use, each set of integrated equipment is for one-time use, and the sub-modules after use cannot be reused, resulting in high replacement and maintenance costs. Utility Model Content

[0003] Based on this, it is necessary to provide a sewage treatment system for the sewage treatment problem. The sewage treatment system of the present application can be directly transported to the sewage treatment site according to actual conditions during use, and can be directly connected to the sewage source after transport. The sewage treatment system does not need to be debugged or activated, and can be directly connected and used after water supply. The installation and replacement efficiency is extremely high, and the sewage treatment efficiency is greatly improved.

[0004] A sewage treatment system comprises a first equipment module and a second equipment module, the first equipment module comprises an anoxic tank and a first contact oxidation tank which are connected to each other, the anoxic tank is provided with a water inlet, the second equipment module comprises a second contact oxidation tank, an MBR membrane tank, a clean water tank and a sludge tank which are connected to each other, the second contact oxidation tank is connected to the first contact oxidation tank through a connecting pipe, the first contact oxidation tank and the second contact oxidation tank are respectively provided with suspended fillers, the clean water tank is provided with a drain, and the first equipment module and the second equipment module are detachably connected to each other.

[0005] In some of the embodiments, a basket grille is provided at the water inlet of the anoxic pool, and the grille spacing of the basket grille is 1 mm to 5 mm.

[0006] In some embodiments, both the first contact oxidation tank and the second contact oxidation tank are provided with an aeration disk;

[0007] And / or, the suspended fillers in the first contact oxidation tank and the second contact oxidation tank are in a cubic structure with a side length of 1 cm to 3 cm.

[0008] In some embodiments, the first equipment module further includes a first grille screen disposed at the connection point between the anoxic tank and the first contact oxidation tank, a first cover plate being hingedly opened and closed on the first grille screen, and a pore size of the first grille screen is 4 mm to 10 mm.

[0009] In some of the embodiments, the second equipment module (200) further comprises a second grille screen disposed in the second contact oxidation tank, a second cover plate being hingedly connected to the second grille screen and capable of opening and closing, and a pore size of the second grille screen is 4 mm to 10 mm.

[0010] In some embodiments, the second contact oxidation tank is connected to the MBR membrane tank through a water hole, and a third grille baffle is provided at the water hole.

[0011] In some of the embodiments, a moisturizing system is provided in the MBR membrane pool;

[0012] And / or, an automatic spraying device is provided on the top of the MBR membrane tank (220).

[0013] In some embodiments, the first contact oxidation tank is provided with first drain ports at the middle and bottom, respectively, and there is a height difference between the plurality of first drain ports, and the plurality of first drain ports can be selectively connected to the outside;

[0014] And / or, a plurality of second drain ports are respectively arranged at the middle and bottom of the second contact oxidation tank, there are height differences between the plurality of second drain ports, and the second drain ports can be selectively connected to the outside.

[0015] In some of the embodiments, a perforated aeration pipe, a water hole and a third drain port are provided at the bottom of the anoxic tank.

[0016] In some embodiments, the first equipment module and / or the second equipment module further includes an equipment room, the equipment room is surrounded by sound insulation cotton, the equipment room is provided with at least one of a blower, a mixed liquor reflux pump, a sludge reflux pump, a disinfection device, a dosing device and an electrical control box, and the blower is used to blow air to at least one of the first contact oxidation tank, the second contact oxidation tank and the MBR membrane tank.

[0017] In some embodiments, the top of the first equipment module and the top of the second equipment module are connected through a corridor, and movable railings are provided on the top of the first equipment module and the top of the second equipment module;

[0018] And / or, at least one of the first equipment module and the second equipment module is configured with an inspection channel.

[0019] The above-mentioned sewage treatment system can be directly replaced to different sewage treatment sites according to actual conditions. The entire sewage treatment system can be directly connected to the water for use. The system does not need to be debugged or activated. It can be directly connected and used with water. The system installation and replacement efficiency is extremely high, and the sewage treatment efficiency is greatly improved. Specifically, during the use of the above-mentioned sewage treatment system, the sewage to be treated can enter the anoxic tank through the water inlet, and then pass through the anoxic tank, the first contact oxidation tank, the second contact oxidation tank, the MBR membrane tank and the clear water tank in turn. The treated water is discharged, and the treated residual sludge enters the sludge tank. The first equipment module and the second equipment module of the present application are detachable and can be modularly spliced. The entire sewage treatment system can also be moved to the sewage site to be treated according to actual needs. After assembly, the system can be used directly without debugging or activation, and can be directly connected and used with water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0021] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0022] Figure 1 A schematic diagram of the top structure of a sewage treatment system provided in one embodiment of the present application.

[0023] Figure 2 for Figure 1 In the AA section view.

[0024] Figure 3 A schematic diagram of the side structure of a sewage treatment system provided in one embodiment of the present application.

[0025] Figure 4 for Figure 3 In BB section view.

[0026] Figure 5 for Figure 4 In CC section view.

[0027] Description of Reference Numerals

[0028] 100, first equipment module; 110, anoxic tank; 111, water inlet; 112, overflow port; 113, third drain port; 114, basket grille; 120, first contact oxidation tank; 121, first drain port; 130, first grille retaining net;

[0029] 200, second equipment module; 210, second contact oxidation tank; 211, second drain port; 212, connecting pipe interface; 220, MBR membrane tank; 221, fourth drain port; 230, clean water tank; 231, drain port; 232, fifth drain port; 240, sludge tank; 250, equipment room; 251, sludge pump; 252, installation platform; 260, second grille retaining net; 270, third grille retaining net;

[0030] 300, maintenance passage; 310, maintenance ladder;

[0031] 400, sludge return pipe;

[0032] 500, aeration pipe;

[0033] 600, water production / backwash pipeline;

[0034] 700, ladder; 710, cage;

[0035] 800. Corridor; 810. Movable railing. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0042] The present application provides a sewage treatment system, such as Figures 1 to 5 As shown, the sewage treatment system comprises a first equipment module 100 and a second equipment module 200. The first equipment module 100 comprises an anoxic tank 110 and a first contact oxidation tank 120 which are connected to each other, and the anoxic tank 110 is provided with a water inlet for the sewage to be treated to enter.

[0043] The second equipment module 200 includes a second contact oxidation tank 210, an MBR membrane tank 220, a clean water tank 230, and a sludge tank 240. The second contact oxidation tank 210 is connected to the first contact oxidation tank 120 through a connecting pipe. Suspended fillers are respectively provided in the first contact oxidation tank 120 and the second contact oxidation tank 210. The clean water tank 230 is provided with a drain 231, which is used to discharge the treated clean water.

[0044] The first device module 100 and the second device module 200 are detachably connected.

[0045] The sewage treatment system of the present application can adopt the treatment process of contact oxidation / MBBR+MBR, with high treatment efficiency, reduced overall size of each set of equipment, and space saving. The whole sewage treatment system is a split combination structure of the first equipment module 100 and the second equipment module 200. The two modules can be independently transported and assembled to achieve multiple reuses, reducing replacement and maintenance costs. The above-mentioned sewage treatment system can be directly replaced to different sewage treatment sites according to actual conditions. The entire sewage treatment system can be directly connected to water for use. The system does not need to be debugged or activated, and can be directly connected and used for water. The system installation and replacement efficiency is extremely high, which also greatly improves the sewage treatment efficiency.

[0046] In some of these embodiments, the suspended filler may be a MBBR suspended filler.

[0047] In some embodiments, such as Figure 4 As shown, a basket grille 114 is provided at the water inlet of the anoxic pool 110. The grid spacing of the basket grille 114 is 1 mm to 5 mm. Preferably, the basket grille 114 is made of a stainless steel woven mesh. The basket grille 114 is provided at the water inlet 111 of the anoxic pool 110 to reduce other foreign matter from entering the anoxic pool 110.

[0048] In some of the embodiments, aeration plates are disposed in both the first contact oxidation tank 120 and the second contact oxidation tank 210 .

[0049] In some of the embodiments, the suspended filler in the first contact oxidation tank 120 is in a cubic structure with a side length of 1 cm to 3 cm.

[0050] In some of the embodiments, the suspended filler in the second contact oxidation tank 210 is in a cubic structure with a side length of 1 cm to 3 cm.

[0051] In some embodiments, such as Figure 2 , Figure 4As shown, the first equipment module 100 also includes a first grille screen 130 arranged at the connection point between the anoxic tank 110 and the first contact oxidation tank 120, the first grille screen 130 is used to isolate the anoxic tank 110 and the first contact oxidation tank 120, and a first cover plate that can be opened and closed is hinged on the first grille screen 130, and the aperture of the first grille screen 130 is 4mm~10mm.

[0052] In some embodiments, such as Figure 2 , Figure 4 As shown, the second equipment module 200 also includes a second grille screen 260 disposed in the second contact oxidation pool 210, and a second cover plate that can be opened and closed is hinged on the second grille screen 260, and the aperture of the second grille screen 260 is 4 mm to 10 mm. The second grille screen 260 is used to isolate the second contact oxidation pool 210 and the MBR membrane pool 220. It should be noted that the above isolation is not complete isolation, but isolation and filtration are performed through the grille screen.

[0053] In some of the embodiments, the second contact oxidation tank 210 is connected to the MBR membrane tank 220 through a water hole, and a third grid baffle is provided at the water hole.

[0054] In some of the embodiments, a moisturizing system is provided in the MBR membrane tank 220 .

[0055] In some embodiments, an automatic spraying device is provided on the top of the MBR membrane pool 220. The automatic spraying device can spray, flush, activate, and perform other operations on the suspended filler in the MBR membrane pool 220.

[0056] In some embodiments, such as Figure 1 , Figure 3 As shown, the first contact oxidation pond 120 is provided with first drain ports 121 at the middle and bottom, respectively. There is a height difference between the plurality of first drain ports 121, and the plurality of first drain ports 121 can selectively communicate with the outside world. The present application provides a plurality of first drain ports 121 that can selectively communicate with the outside world, so as to discharge substances from different areas in the first contact oxidation pond 120. It is understandable that the plurality of first drain ports 121 can all be in an open state, or some can be in an open state and some can be in a closed state. In addition, providing the first drain ports 121 at different heights is also conducive to maintaining the biomass in the first contact oxidation pond 120.

[0057] like Figure 4As shown, two first drain ports 121 are provided, the upper first drain port 121 is connected to the outside, so as to discharge part of the sewage in the first contact oxidation tank 120, and the lower first drain port 121 is connected to the outside, so as to discharge not only the sewage in the first contact oxidation tank 120 but also the activated sludge in the first contact oxidation tank 120. In actual use, the first drain port 121 at a specific position is selected to be released according to actual operation needs.

[0058] Specifically, a valve is installed at each first exhaust port 121 to open or close the first exhaust port 121 .

[0059] Specifically, the dimension between the hole center of the plurality of first drain ports 121 and the bottom surface of the first contact oxidation tank 120 along the first direction is not greater than 1 / 3 of the height of the first contact oxidation tank 120, wherein the first direction is the height direction of the first contact oxidation tank 120. That is, the dimension between the highest first drain port 121 among the plurality of first drain ports 121 and the bottom surface of the first contact oxidation tank 120 is less than or equal to 1 / 3 of the height of the first contact oxidation tank 120.

[0060] In some embodiments, a plurality of second drain ports 211 are respectively provided at the middle and bottom positions of the second contact oxidation pond 210, and there is a height difference between the plurality of second drain ports 211, and the second drain ports 211 can selectively communicate with the outside world. It is understandable that the plurality of first drain ports 121 can all be in an open state, or partially in an open state, and partially in a closed state. By setting the second contact oxidation pond 210, the first contact oxidation pond 120 and the MBR membrane pond 220 are connected. A plurality of second drain ports 211 with a height difference are provided on the second contact oxidation pond 210, and the plurality of second drain ports 211 can selectively communicate with the outside world, thereby discharging substances from different areas in the second contact oxidation pond 210. The second drain ports 211 of different heights provided in the present application are also conducive to maintaining the biomass in the second contact oxidation pond 210. It is understandable that the plurality of second drain ports 211 can all be in an open state, or partially in an open state, and partially in a closed state.

[0061] In the present application, the middle and bottom positions of the first contact oxidation tank 120 are respectively provided with a first drain port 121, and there is a height difference between the multiple first drain ports 121, and / or, the middle and bottom positions of the second contact oxidation tank 210 are respectively provided with a plurality of second drain ports 211, and there is a height difference between the multiple second drain ports 211. By setting the first drain port 121 at the middle position and the second drain port 211 connected to the middle drain pipe, the biological activity of the biomass and the suspended filler in the first contact oxidation tank 120 and the second contact oxidation tank 210 can be maintained. Furthermore, a moisturizing system is provided in the MBR membrane tank 220. The present application can also provide a moisturizing system to maintain the normal operation of the MBR membrane system, so that the new first equipment module 100 and / or the second equipment module 200 can be directly used by passing water after combination without the need for preliminary debugging and activation when restarting, thereby achieving the purpose of quick start and plug-and-play.

[0062] like Figure 4 As shown, two second drain ports 211 are provided, the upper second drain port 211 is connected to the outside, so as to discharge part of the sewage in the second contact oxidation tank 210, and the lower second drain port 211 is connected to the outside, so as to discharge not only the sewage in the second contact oxidation tank 210 but also the activated sludge in the second contact oxidation tank 210. In actual use, the second drain port 211 at a specific position is selected for release according to actual operation needs.

[0063] In some embodiments, a valve is installed at each second exhaust port 211 to open or close the second exhaust port 211 .

[0064] In some embodiments, the first equipment module 100 and / or the second equipment module 200 further include an equipment room 250. Sound insulation cotton is arranged around the equipment room 250, and the equipment room 250 is provided with at least one of a blower, a mixed liquor return pump, a sludge return pump, a disinfection device, a dosing device and an electric control box. The blower is used to blow air to at least one of the first contact oxidation tank 120, the second contact oxidation tank 210, and the MBR membrane tank 220 to improve the sewage treatment effect.

[0065] Preferably, the equipment room 250 is provided with a blower, a mixed liquor return pump, a sludge return pump, a disinfection device, a dosing device and an electric control box. Among them, the mixed liquor return pump is used to return the mixed liquor in the aerobic tank to the anoxic tank for denitrification, the sludge return pump is used to return the high-concentration sludge in the membrane tank to the anoxic tank to replenish the biomass in the anoxic tank, the disinfection device is used to kill the bacteria in the effluent, and the dosing device is used to remove TP in the sewage.

[0066] In some embodiments, a sludge pump 251 is provided in the equipment room 250. The sludge pump 251 is used to pump the sludge in the MBR membrane tank 220 into the sludge tank 240, the first contact oxidation tank 120, and the anoxic tank 110. By providing the sludge pump 251 in the equipment room 250, the sludge pump 251 can pump the sludge in the MBR membrane tank 220 into the sludge tank 240, and can also pump the sludge in the MBR membrane tank 220 into the first contact oxidation tank 120 or the anoxic tank 110.

[0067] In some embodiments, such as Figure 2 As shown, an installation platform 252 is provided in the equipment room 250 , and the sludge pump 251 is installed on the installation platform 252 .

[0068] In some embodiments, such as Figure 2 , Figure 4 As shown, the sewage treatment system also includes a sludge return pipe 400 connected to the sludge pump 251, and the sludge return pipe 400 passes through the sludge tank 240, the first contact oxidation tank 120 and the anoxic tank 110, and interfaces are provided corresponding to the sludge tank 240, the first contact oxidation tank 120 and the anoxic tank 110, so that the sludge transported through the sludge return pipe 400 can flow into the sludge tank 240, the first contact oxidation tank 120 and the anoxic tank 110.

[0069] In some embodiments, such as Figure 4 As shown, the sewage treatment system also includes an aeration pipe 500 connected to the blower, and the aeration pipe 500 is provided with multiple outlets, some of which are respectively located in the first contact oxidation tank 120, the second contact oxidation tank 210, and the MBR membrane tank 220, and some of the outlets are directed toward the first grille baffle 130 and the second grille baffle 260.

[0070] In some of the embodiments, the top of the first equipment module 100 and the top of the second equipment module 200 are connected through a corridor 800 , and movable railings 810 are provided on the top of the first equipment module 100 and the top of the second equipment module 200 .

[0071] In some of the embodiments, at least one of the first equipment module 100 and the second equipment module 200 is provided with a maintenance passage 300 .

[0072] In some embodiments, such as Figure 1 As shown, connecting pipe interfaces 212 are respectively provided on the first contact oxidation tank 120 and the second contact oxidation tank 210, one end of the connecting pipe is connected to the connecting pipe interface 212 on the first contact oxidation tank 120, and the other end is connected to the connecting pipe interface 212 on the second contact oxidation tank 210, so as to connect the first contact oxidation tank 120 and the second contact oxidation tank 210.

[0073] In some embodiments, such as Figure 1 , Figure 3 As shown, two water inlets 111 are provided on the anoxic pool 110 .

[0074] In some embodiments, such as Figure 1 As shown, an overflow port 112 is provided on the anoxic pool 110 .

[0075] In some embodiments, a perforated aeration pipe, a water hole and a third drain port 113 are disposed at the bottom of the anoxic pool 110 .

[0076] In some embodiments, such as Figure 1 , Figure 3 , Figure 4 As shown, a fourth drain port 221 is provided on the MBR membrane tank 220 .

[0077] In some of the embodiments, a fifth drain port 232 is disposed on the clean water tank 230 .

[0078] Specifically, an MBR membrane assembly is arranged in the MBR membrane pool 220, a perforated aeration pipe is arranged around it, a sludge return hole is arranged in the middle of the membrane pool, the sludge return hole is connected to the sludge pool 240, and a grille baffle is arranged around the return hole.

[0079] In some embodiments, such as Figure 4 As shown, the sewage treatment system further includes a water production / backwashing pipeline 600 , which is used to transport liquid to flush the MBR membrane pool 220 .

[0080] In some embodiments, the first equipment module 100 includes a first shell, and the space in the first shell is divided into two chambers to form an anoxic tank 110 and a first contact oxidation tank 120; the second equipment module 200 includes a second shell, the size of the first shell is the same as the size of the second shell, and the space in the second shell is divided into multiple chambers to respectively form a second contact oxidation tank 210, an MBR membrane tank 220, a clean water tank 230, a sludge tank 240 and an equipment room 250, etc. The first shell is divided into two chambers to form the anoxic tank 110 and the first contact oxidation tank 120, and the second shell is divided into five chambers to form the second contact oxidation tank 210, the MBR membrane tank 220, the clean water tank 230, the sludge tank 240 and the equipment room 250. The first shell and the second shell of the present application have the same size and can be freely spliced.

[0081] In some embodiments, the first housing and the second housing have dimensions of 6.1 m×3 m×3 m (length×width×height).

[0082] In some of the embodiments, the equipment room 250 of the second equipment module 200 is provided with a door connected to the outside world, and a ladder 700 and a protective cage 710 are provided on the outer wall of the second equipment module 200, and the protective cage 710 is arranged around the ladder 700, and the ladder 700 can be used to climb to the top of the second equipment module 200.

[0083] In some embodiments, such as Figure 1 As shown, the top of the first equipment module 100 and the top of the second equipment module 200 are connected through a corridor 800, and movable railings 810 are provided on the tops of the first equipment module 100 and the second equipment module 200. By providing the corridor 800 to connect the first equipment module 100 and the second equipment module 200, maintenance personnel can move through the tops of the first equipment module 100 and the second equipment module 200. Figure 5 As shown, a movable railing 810 is also provided on the top of the first equipment module 100 and the second equipment module 200 to improve safety during maintenance.

[0084] In some embodiments, such as Figure 1 As shown, at least one of the first equipment module 100 and the second equipment module 200 is configured with an inspection channel 300 . Since the water inlet 111 is provided with a basket lifting grid 114 , the inspection channel 300 in the anoxic tank 110 can be arranged directly above the basket lifting grid 114 .

[0085] Preferably, the anoxic tank 110 and the first contact oxidation tank 120 of the first equipment module 100, the second contact oxidation tank 210, the MBR membrane tank 220, the clean water tank 230 and the sludge tank 240 of the second equipment module 200 are all provided with an inspection channel 300, so that the staff can directly enter the tank from the inspection channel 300. The inspection channel 300 in the anoxic tank 110 is arranged directly above the basket grille 114, so that the maintenance staff can directly inspect the basket grille 114.

[0086] In some of the embodiments, each maintenance channel 300 is configured with a maintenance ladder 310 , and the maintenance ladder 310 is connected to the inner wall of the corresponding pool.

[0087] In summary, the above-mentioned sewage treatment system can be directly replaced to different sewage treatment sites according to actual conditions. The entire sewage treatment system can be directly connected to the water for use. The system does not need to be debugged or activated. It can be directly connected and used with water. The system installation and replacement efficiency are extremely high, and the sewage treatment efficiency is greatly improved. Specifically, during the use of the above-mentioned sewage treatment system, the sewage to be treated can enter the anoxic tank through the water inlet, and then pass through the anoxic tank, the first contact oxidation tank, the second contact oxidation tank, the MBR membrane tank and the clear water tank in turn. The treated water is discharged, and the treated residual sludge enters the sludge tank. The first equipment module and the second equipment module of the present application are detachable and can be modularly spliced. The entire sewage treatment system can also be moved to the sewage site to be treated according to actual needs. After assembly, the system can be used directly without debugging or activation, and can be directly connected and used with water.

[0088] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sewage treatment system, characterized in that: The sewage treatment system comprises a first equipment module (100) and a second equipment module (200), wherein the first equipment module (100) comprises an anoxic tank (110) and a first contact oxidation tank (120) which are connected to each other, wherein the anoxic tank (110) is provided with a water inlet, and the second equipment module (200) comprises a second contact oxidation tank (210), an MBR membrane tank (220), a clean water tank (230) and a sludge tank (240) which are connected to each other, wherein the second contact oxidation tank (210) is connected to the first contact oxidation tank (120) via a connecting pipe, wherein the first contact oxidation tank (120) and the second contact oxidation tank (210) are respectively provided with suspended fillers, and the clean water tank (230) is provided with a drain outlet (231), and the first equipment module (100) and the second equipment module (200) are detachably connected to each other.

2. The sewage treatment system according to claim 1, characterized in that: A basket grille (114) is provided at the water inlet of the anoxic pool (110), and the grille spacing of the basket grille (114) is 1 mm to 5 mm.

3. The sewage treatment system according to claim 1, characterized in that: Aeration plates are provided in both the first contact oxidation tank (120) and the second contact oxidation tank (210); And / or, the suspended filler in the first contact oxidation tank (120) and the second contact oxidation tank (210) is in a cubic structure with a side length of 1 cm to 3 cm.

4. The sewage treatment system according to claim 1, characterized in that: The first equipment module (100) further comprises a first grille screen (130) arranged at the connection point between the anoxic tank (110) and the first contact oxidation tank (120), wherein a first cover plate that can be opened and closed is hingedly connected to the first grille screen (130), and the aperture of the first grille screen (130) is 4 mm to 10 mm.

5. The sewage treatment system according to claim 1, characterized in that: The second equipment module (200) further comprises a second grille screen (260) arranged in the second contact oxidation tank (210), a second cover plate being hingedly connected to the second grille screen (260) and being openable and closable, and a hole diameter of the second grille screen (260) is 4 mm to 10 mm.

6. The sewage treatment system according to claim 1, characterized in that: The second contact oxidation tank (210) is connected to the MBR membrane tank (220) via a water hole, and a third grille baffle is provided at the water hole.

7. The sewage treatment system according to any one of claims 1 to 6, characterized in that: A moisturizing system is provided in the MBR membrane pool (220); And / or, an automatic spraying device is provided on the top of the MBR membrane tank (220).

8. The sewage treatment system according to any one of claims 1 to 6, characterized in that: The first contact oxidation pool (120) is provided with first drain ports (121) at the middle and bottom, respectively. There is a height difference between the plurality of first drain ports (121). The plurality of first drain ports (121) can be selectively connected to the outside. And / or, a plurality of second drain ports (211) are respectively provided at the middle and bottom of the second contact oxidation tank (210), and there is a height difference between the plurality of second drain ports (211), and the second drain ports (211) can be selectively connected to the outside.

9. The sewage treatment system according to any one of claims 1 to 6, characterized in that: The bottom of the anoxic tank (110) is provided with a perforated aeration pipe, a water hole and a third drain port (113).

10. The sewage treatment system according to any one of claims 1 to 6, characterized in that: The first equipment module (100) and / or the second equipment module (200) further comprises an equipment room (250), and sound insulation cotton is arranged around the equipment room (250). The equipment room (250) is provided with at least one of a blower, a mixed liquor return pump, a sludge return pump, a disinfection device, a dosing device and an electrical control box. The blower is used to blow air to at least one of the first contact oxidation tank (120), the second contact oxidation tank (210), and the MBR membrane tank (220).

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