CN210367334U

CN210367334U - Sewage treatment equipment

Info

Publication number: CN210367334U
Application number: CN201920789269.0U
Authority: CN
Inventors: 杨圣军; 薛驰; 汪建元; 尹博文; 陈娇; 刘振华
Original assignee: Changzhou Industrial Technology Research Institute of Zhejiang University
Current assignee: Changzhou Industrial Technology Research Institute of Zhejiang University
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-04-21
Anticipated expiration: 2029-05-28

Abstract

The utility model provides a sewage treatment device, include: the device comprises a pretreatment tank, a water inlet is formed in the upper end of the pretreatment tank, and a solid-liquid separation mechanism is fixedly arranged below the water inlet; the anoxic tank is arranged on one side of the pretreatment tank and is communicated with the pretreatment tank through a first water conveying mechanism; the aeration tank comprises an aeration mechanism, and the aeration mechanism is used for increasing the oxygen content of sewage in the aeration tank; the aerobic tank is communicated with the aeration tank through a second channel; and the filter tank is communicated with the aerobic tank through a third overflow port. This kind of sewage treatment plant separately sets up aeration tank and good oxygen pond and through the passageway intercommunication of below, lets the aeration tank can be abundant carry out the aeration operation, lets good oxygen pond possess sufficient oxygen, improves the sewage treatment efficiency of device.

Description

Sewage treatment equipment

Technical Field

The utility model relates to a sewage treatment field especially relates to a sewage treatment device.

Background

With the rapid development of economy, the problem of environmental pollution becomes more and more serious, and one of the reasons for this problem is the messy discharge of sewage. In the prior art, people use a plurality of sewage treatment devices, and the sewage treatment by using an aerobic tank is an important step in the sewage treatment devices. However, these sewage treatment apparatuses have a problem of insufficient sewage conversion rate in the process of pretreating sewage, and the oxygen content in the aerobic tank often fails to achieve a satisfactory effect in the treatment process of the aerobic tank. Therefore, there is a need for a sewage treatment apparatus to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problem of insufficient oxygen in an aerobic tank in the treatment process, the utility model provides a sewage treatment device to solve the problem.

The utility model provides a technical scheme that its technical problem adopted is: a sewage treatment apparatus comprising:

the sewage treatment device comprises a pretreatment tank, a water inlet is formed in the upper end of the pretreatment tank, a solid-liquid separation mechanism is fixedly arranged below the water inlet and used for separating large granular impurities visible to naked eyes in sewage from the sewage, a discharge hole is formed in the part, below the solid-liquid separation mechanism, of the pretreatment tank in a protruding mode, the part, below the discharge hole, of the pretreatment tank is upwards sunken to form a discharge containing cavity, and an opening is formed between the discharge containing cavity and one side of the sewage treatment device;

the anaerobic tank is arranged on one side of the pretreatment tank and comprises a first anaerobic tank and a second anaerobic tank which are separated through a first partition plate, the first anaerobic tank is communicated with the pretreatment tank through a first water conveying mechanism, the second anaerobic tank is positioned on one side, away from the pretreatment tank, of the first anaerobic tank, a first overflow port is formed in the first partition plate, the first anaerobic tank is higher than the second anaerobic tank, and anaerobic bacteria are cultured in the first anaerobic tank and the second anaerobic tank;

the aeration tank is positioned on one side of the second anoxic tank, which is far away from the first anoxic tank, and is separated from the second anoxic tank through a second partition plate, a second overflow port is arranged above the second partition plate, the aeration tank comprises a third partition plate, a fourth partition plate and an aeration mechanism, the third partition plate is positioned at the position of the aeration tank, which is close to the second partition plate, a first channel is arranged below the third partition plate, the fourth partition plate is a side wall of the aeration tank, which is far away from one side of the second anoxic tank, a second channel is arranged below the fourth partition plate, the aeration tank is communicated with the second anoxic tank through the second overflow port and the first channel, the aeration mechanism is arranged between the third partition plate and the fourth partition plate, and the aeration mechanism is used for increasing the oxygen content of sewage in the aeration tank;

the aerobic tank is positioned on one side of the aeration tank close to the fourth partition plate, the aerobic tank is communicated with the aeration tank through the second channel, and nitrifying bacteria are cultured in the aerobic tank;

the filtering tank is located on one side, far away from the second channel, of the aerobic tank, the filtering tank is communicated with the aerobic tank through a third overflow port, a backflow mechanism is arranged between the filtering tank and the anoxic tank, the filtering tank comprises a filtering mechanism, the filtering mechanism is used for filtering sewage and then storing the filtered sewage into a water purifying cavity, a second water conveying mechanism is arranged above the filtering tank, and the second water conveying mechanism is used for pumping out water in the water purifying cavity.

Preferably, the solid-liquid separation mechanism comprises a first driving mechanism and a water filtering barrel;

the first driving mechanism comprises a first motor and a first gear, the first motor is fixedly arranged outside the upper end of the pretreatment tank, a rotating shaft of the first motor vertically and downwards penetrates through the upper end of the pretreatment tank, and the first gear is coaxially and fixedly connected with the rotating shaft of the first motor;

a water inlet check ring is arranged on the water inlet, a coarse filter plate is arranged in the water inlet check ring, the inner wall of the upper end of the water filtering barrel is rotatably connected with the outer wall of the water inlet check ring through a bearing, a first gear ring is fixedly arranged on the outer wall of the upper end of the water filtering barrel, and the first gear ring is meshed with the first gear;

a plurality of water leakage holes are formed in the wall of the water filtering barrel, and shielding inclined planes are fixedly connected to the outer walls below the plurality of water leakage holes;

two triangular notches are oppositely arranged on the wall surface of the lower end of the water filtering barrel, two semicircular baffle plates are arranged below the two notches, two ends of the diameter sides of the two baffle plates are respectively hinged with the top points of the two notches, and one ends, far away from the hinged parts, of the two baffle plates are fixedly connected with a heavy object through wires.

Preferably, the aeration mechanism comprises a second motor, a rotating shaft, a plurality of first connecting rods, a first shell, a plurality of jet pipes, a second shell, an air inlet impeller, a third shell and a water inlet impeller, the second motor is fixedly arranged above the aeration tank, the rotating shaft of the second motor is vertically and downwardly arranged, the rotating shaft is vertically arranged below the second motor, the upper end of the rotating shaft is coaxially fixed with the rotating shaft of the second motor, and the rotating shaft is fixedly connected with the plurality of first connecting rods, the air inlet impeller and the water inlet impeller from top to bottom;

the jet pipe is fixedly arranged on the first shell in a radial mode and comprises a horizontal pipe and an inclined pipe which are integrally connected, the horizontal pipe penetrates through the first shell and extends into the first shell, the joint of the horizontal pipe and the inclined pipe is fixedly connected with the first shell, one end, far away from the first shell, of the inclined pipe extends out from the joint of the horizontal pipe and the inclined pipe to the oblique upper side of one side, far away from the first shell, of the inclined pipe, and free ends of the horizontal pipe and the inclined pipe form openings;

the second shell is positioned below the first connecting rods, the outer wall of the second shell is fixedly connected with the plurality of first connecting rods, and the air inlet impeller is positioned in a cavity of the second shell;

the third shell is positioned below the first shell, the inner wall of the third shell is rotatably connected with the outer wall of the first shell through a bearing, and the water inlet impeller is positioned in a containing cavity of the third shell;

the first casing outer wall is fixed with a circle of floating portion, floating portion below be equipped with a plurality of connecting chains of first casing fixed connection, first casing passes through the connecting chain with third baffle and fourth baffle are connected.

Preferably, the filtering mechanism comprises a filtering membrane group and a filtering barrel;

the filtering membrane group is vertically arranged on one side of the filtering barrel close to the third overflow port and comprises a plurality of vertically arranged filtering membranes;

the filter barrel comprises an outer barrel layer, a first filter layer, a second filter layer and an inner barrel layer which are vertically arranged from outside to inside, a plurality of through holes are formed in the outer barrel layer and the inner barrel layer, the inner side of the inner barrel layer is provided with the water purification cavity, the first filter layer is an activated carbon layer, the second filter layer is a sponge layer, and the thickness ratio of the first filter layer to the second filter layer is 2: 1.

Preferably, the first water delivery mechanism comprises a first water suction pump, a first connecting pipe and a second connecting pipe, the pretreatment tank is communicated with a water suction port of the first water suction pump through the first connecting pipe, and the first anoxic tank is communicated with a water outlet of the first water suction pump through the second connecting pipe;

the second water delivery mechanism comprises a second water suction pump, a third connecting pipe and a fourth connecting pipe, the water purification cavity is communicated with a water suction port of the second water suction pump through the third connecting pipe, and the fourth connecting pipe is fixedly connected with a water outlet of the second water suction pump;

the backflow mechanism comprises a sludge backflow pump, a fifth connecting pipe and a sixth connecting pipe. The filter tank is communicated with the sludge reflux pump through the fifth connecting pipe, and the sludge reflux pump is communicated with the first anoxic tank through the sixth connecting pipe.

Preferably, the second channels are provided with filter plates.

Preferably, a suspension ball is put into the aerobic tank.

The beneficial effects of the utility model are that, this kind of sewage treatment plant separately sets up aeration tank and good oxygen pond and through the passageway intercommunication of below, lets the aeration tank can be abundant carry out aeration operation, lets good oxygen pond possess sufficient oxygen, improves the sewage treatment efficiency of device.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural view of a preferred embodiment of a sewage treatment apparatus of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a partially enlarged view of fig. 1.

Fig. 4 is a partially enlarged view of fig. 1.

Fig. 5 is a schematic structural diagram of another embodiment of the sewage treatment apparatus of the present invention.

In the figure, 1, a pretreatment tank, 101, a water inlet, 102, a water inlet retainer ring, 103, a coarse filter plate, 104, a discharge port, 105, a discharge cavity, 2, a solid-liquid separation mechanism, 201, a first motor, 202, a first gear, 203, a water filtering barrel, 204, a first gear ring, 205, a water leakage hole, 206, a blocking inclined surface, 207, a blocking plate, 208, a heavy object, 3, an anoxic tank, 301, a first anoxic tank, 302, a first overflow port, 303, a first partition plate, 304, a second anoxic tank, 305, a second overflow port, 306, a second partition plate, 4, a first water delivery mechanism, 401, a first pump, 402, a first connecting pipe, 403, a second connecting pipe, 5, an aeration tank, 501, a third partition plate, 502, a first channel, 503, a fourth partition plate, 504, a second channel, 505, a filter plate, 6, a mechanism, 601, a second motor, 602, a rotating shaft, 603, a first connecting rod, 604, a first shell, 605. the jet pipe 606, the second casing 607, the air inlet impeller 608, the third casing 609, the water inlet impeller 6010, the floating part 7, the aerobic tank 701, the floating ball 702, the third overflow port 8, the filtering tank 801, the filtering module 802, the filtering barrel 8021, the outer barrel layer 8022, the first filtering layer 8023, the second filtering layer 8024, the inner barrel layer 809, the second water delivery mechanism 901, the second water pump 902, the third connecting pipe 903, the fourth connecting pipe 10, the reflux mechanism 1001, the sludge reflux pump 1002, the fifth connecting pipe 1003, and the sixth connecting pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in figures 1-5, the utility model provides a sewage treatment device, include: a pretreatment tank 1, an anoxic tank, an aeration tank 5, an aerobic tank 7 and a filter tank 8.

The upper end of pretreatment pond 1 is the roof of pretreatment pond 1, has seted up circular shape water inlet 101 on the roof of pretreatment pond 1, and the inboard fixedly connected with of water inlet 101 advances water retaining ring 102, advances water retaining ring 102 and is the ring shape firmware of stainless steel preparation. The vertical height of the water inlet check ring 102 is twice that of the water inlet 101, the upper end of the water inlet check ring 102 is located at the same height as that of the water inlet 101, a circular rough filtering plate 103 horizontally arranged is fixedly connected to the inner ring of the water inlet check ring 102, and four round holes distributed in a shape like a Chinese character 'tian' are formed in the rough filtering plate 103. The coarse filter plate 103 is mainly used to filter large waste in the sewage and prevent the large waste from damaging the solid-liquid separation mechanism 2.

The solid-liquid separation mechanism 2 is arranged below the water inlet 101, and the solid-liquid separation mechanism 2 includes a first drive mechanism and a water filtration bucket 203. The first driving mechanism comprises a first motor 201 and a first gear 202, the first motor 201 is a forward and reverse rotating motor, the first motor 201 is fixed on the outer side of the top plate of the pretreatment tank 1 through screws, a rotating shaft of the first motor 201 vertically penetrates through the top plate of the pretreatment tank 1 downwards, and the part, below the top plate of the pretreatment tank 1, of the rotating shaft of the first motor 201 is coaxially and fixedly connected with the first gear 202.

The filtering water bucket 203 comprises a first part and a second part which are integrally connected, and the first part of the filtering water bucket 203 is positioned above the second part of the filtering water bucket 203.

The first part of the filtering water barrel 203 is a hollow funnel surrounded by wall surfaces, and the funnel-shaped design can lead sewage to flow into the second part of the filtering water barrel 203 along the wall surfaces. The inner wall of the upper end of the first part of the water filtering barrel 203 is fixedly connected with the outer ring of the bearing, and the inner ring of the bearing is fixedly connected with the outer wall of the water inlet retainer ring 102. A first gear ring 204 is fixedly arranged on the outer wall of the upper end of the first part of the filtering water barrel 203, and the first gear ring 204 is meshed with the first gear 202.

The second part of the water filtering barrel 203 is a hollow cylinder surrounded by wall surfaces, a plurality of water leakage holes 205 are arranged on the wall surface of the second part of the water filtering barrel 203, and the shape of the water leakage holes 205 is circular. When the filtering water bucket 203 rotates, the sewage in the second portion of the filtering water bucket 203 enters the pretreatment tank 1 from the water leakage holes 205 by the centrifugal force. A circle of shielding inclined plane 206 is fixedly connected to the outer wall below the plurality of water leakage holes 205.

Two triangular notches are oppositely arranged on the wall surface of the lower end of the filtering water barrel 203, and the distance between the top points of two bottom angles of the two notches is consistent with the diameter of the second part of the filtering water barrel 203. Two semicircular baffle plates 207 are arranged below the two notches, and two ends of the diameter edges of the two baffle plates 207 are respectively hinged with the top points of the two notches. One end of each of the two baffle plates 207, which is far away from the hinged position, is fixedly connected with a weight 208 through waterproof nylon, and the weight 208 is a steel ball with the outer layer wrapped with rubber. When the filtering water barrel 203 rotates, the two weights 208 rotate under the action of centrifugal force. The two weights 208 can rise to a certain height in the rotating process, and the two shielding plates 207 connected with the two weights 208 can shield the two gaps along with the rising of the weights 208, so that the sewage is prevented from falling from the gaps, and the conversion efficiency of the sewage in the solid-liquid separation process is improved.

When the solid-liquid separation mechanism 2 rotates, the sewage filtered by the coarse filter plate 103 enters the second part of the filter water tank 203 along the first part of the filter water tank 203. After the sewage enters the second portion of the filtering water tank 203, the sewage leaks from the water leakage holes 205 by the centrifugal force, and the impurities existing in the sewage and having a volume larger than that of the water leakage holes 205 do not leak from the water leakage holes 205. The two baffle plates 207 can prevent sewage from leaking from the gap, and the sewage conversion rate is improved. The first motor 201 is a forward and reverse rotation motor, when the first motor 201 is in a forward and reverse rotation staggered time, the two weights 208 can droop due to the action of gravity, the two shielding plates 207 can not shield the two gaps any more, and impurities in the sewage which can not pass through the water leakage holes 205 can also leave the second part of the filtering water barrel 203 from the two gaps. The upper surface of the shielding inclined surface 206 can allow leaked sewage to flow into the pretreatment tank 1, and the lower surface of the shielding inclined surface 206 can limit the lifting height of the two weights 208, so that the influence of the two weights on the solid-liquid separation process is avoided.

The part of the pretreatment tank 1 below the discharge port 104 is recessed upwards to form a discharge cavity 105, and the discharge cavity 105 and one side of the sewage treatment equipment form an opening. The part of the discharging cavity 105 below the solid-liquid separation mechanism 2 is provided with a discharging hole 104 in an upward protruding manner, the discharging hole 104 is provided with an upper opening and a lower opening, and impurities leaving from the second part of the water filtering barrel 203 can enter the discharging cavity 105 from the discharging hole 104. A user can place a receptacle for impurities in the output volume 105 for collecting and disposing of impurities generated during the solid-liquid separation process.

The anoxic tank 3 is arranged on one side of the pretreatment tank 1, the anoxic tank 3 comprises a first anoxic tank 301 and a second anoxic tank 304 which are separated by a first partition plate 303, and anaerobic bacteria are cultured in the first anoxic tank 301 and the second anoxic tank 304. The first anoxic pond 301 is close to the pretreatment pond 1 relative to the second anoxic pond 304, and the first anoxic pond 301 is communicated with the pretreatment pond 1 through the first water conveying mechanism 4.

The first water transport mechanism 4 comprises a first suction pump 401, a first connection pipe 402 and a second connection pipe 403. Each of the first and

second connection pipes

402 and 403 includes two portions of a vertically disposed vertical end and a horizontally disposed horizontal end. The vertical end of the first connecting pipe 402 is inserted into the pretreatment tank 1, and the horizontal end of the first connecting pipe 402 is connected with the water pumping port of the first water pump 401. The horizontal end of the second connection pipe 403 is connected with the water outlet of the first suction pump 401, and the vertical end of the first connection pipe 402 is inserted into the first anoxic pond 301.

The first partition plate 303 is provided with a first overflow port 302, the height of the first anoxic tank 301 is higher than that of the second anoxic tank 304, and sewage can enter the second anoxic tank 304 through the first overflow port 302 after filling the first anoxic tank 301. The first and second

anoxic tanks

301 and 304 may extend a treatment time of sewage in the anoxic tank 3. Anaerobic bacteria in the anoxic tank 3 can enable organic matters in the sewage to perform sound hydrolysis, acidification and methanation reactions, remove the organic matters in the sewage, and lay a cushion for the treatment of the sewage in the aerobic tank 7.

The aeration tank 5 is positioned on one side of the second anoxic tank 304 far away from the first anoxic tank 301, the aeration tank 5 is separated from the second anoxic tank 304 by a second partition 306, and a second overflow port 305 is arranged above the second partition 306. The aeration tank 5 comprises a third partition 501, a fourth partition 503 and an aeration mechanism 6, wherein the third partition 501 is positioned at the position of the aeration tank 5 close to the second partition 306, and a first channel 502 is arranged below the third partition 501. The aeration tank 5 is communicated with the second anoxic tank 304 through the second overflow port 305 and the first passage 502, and sewage can enter the aeration tank 5 from the second overflow port 305 and the first passage 502 after filling the second anoxic tank 304.

The fourth partition 503 is a side wall of the aeration tank 5 far away from the second anoxic tank 304, and a second channel 504 is arranged below the fourth partition 503. The aeration mechanism 6 is arranged between the third partition 501 and the fourth partition 503, the aeration mechanism 6 for generating oxygen can stimulate water splash during operation, and the third partition 501 can prevent the water splash from entering the second anoxic tank 304, so that the anoxic treatment process of sewage is prevented from being influenced.

The aeration mechanism 6 comprises a second motor 601, a rotating shaft 602, a plurality of first connecting rods 603, a first housing 604, a plurality of jet pipes 605, a second housing 606, an air inlet impeller 607, a third housing 608 and a water inlet impeller 609.

The second motor 601 is fixedly arranged at the upper end of the top plate of the aeration tank 5 through screws, and a rotating shaft of the second motor 601 vertically penetrates through the top plate of the aeration tank 5 downwards. The rotating shaft 602 is vertically arranged below the second motor 601, the upper end of the rotating shaft 602 is coaxially fixed with the rotating shaft of the second motor 601, and the rotating shaft 602 is fixedly connected with a plurality of first connecting rods 603, an air inlet impeller 607 and a water inlet impeller 609 from top to bottom.

The first connecting rods 603 are all cylindrical steel pipes made of stainless steel, and the first connecting rods 603 are radially distributed on the rotating shaft 602. The plurality of first connecting rods 603 are all obliquely arranged, the upper ends of the first connecting rods 603 are fixedly connected with the rotating shaft 602, and the lower ends of the first connecting rods 603 extend out obliquely below one side far away from the rotating shaft 602.

The first housing 604 is a hollow cylinder surrounded by rectangular stainless steel walls and having a uniform vertical shape, and the first housing 604 is vertically disposed in water. The upper edge of the first housing 604 is fixedly connected to the lower end of the first connecting rod 603.

The plurality of jet pipes 605 are radially distributed on the first housing 604, the jet pipes 605 include a horizontal pipe and an inclined pipe which are integrally connected, the cross sections of the horizontal pipe and the inclined pipe are both circular, and the free ends of the horizontal pipe and the inclined pipe are both provided with openings. The junction of the horizontal tube and the inclined tube is fixedly connected with the first shell 604 in a sealing way, the horizontal tube is positioned in the cavity of the first shell 604, and the free end of the inclined tube extends out from the junction of the horizontal tube and the inclined tube to the inclined upper part of one side far away from the first shell 604.

The second shell 606 is a hollow round table surrounded by thin walls, the inclination angle of the wall surface of the second shell 606 is consistent with the inclination angles of the plurality of first connecting rods 603, the outer wall of the second shell 606 is fixedly connected with the plurality of first connecting rods 603, and the air inlet impeller 607 is positioned in the containing cavity of the second shell 606.

The third housing 608 is located below the first housing 604, and the third housing 608 is a hollow cylinder surrounded by rectangular walls. A bearing is arranged on the inner wall of the third housing 608, the inner wall of the third housing 608 is fixedly connected with the outer ring of the bearing, and the inner ring of the bearing is fixedly connected with the outer ring of the first housing 604. The water inlet impeller 609 is positioned in the cavity of the third housing 608, and the water inlet impeller 609 is coaxially and fixedly disposed at the lower end of the rotating shaft 602.

After the second motor 601 is powered on and started, the rotating shaft of the second motor 601 rotates to drive the rotating shaft 602 coaxially connected with the rotating shaft to rotate. The first connecting rod 603, the air intake impeller 607, and the water intake impeller 609 fixedly connected to the rotating shaft 602 rotate, the first casing 604 and the second casing 606 fixedly connected to the first connecting rod 603 rotate, and the jet pipe 605 fixedly connected to the first casing 604 rotates. The air intake impeller 607 and the second housing 606 allow the air content in the first housing 604 to be increased, and the jet pipe 605 and the first housing 604 allow the sewage to be sufficiently mixed with the air. The jet pipe 605 also throws the water flow after the air mixing out of the aeration mechanism 6, so as to improve the whole oxygen content of the aeration tank 5. The water inlet impeller 609 continuously conveys the sewage into the cavity of the first housing 604, so as to increase the oxygen content of the whole aeration tank 5.

A circle of floating part 6010 is fixed on the outer wall of the first shell 604, a plurality of connecting chains fixedly connected with the first shell 604 are arranged below the floating part 6010, and the first shell 604 is connected with the third partition 501 and the fourth partition 503 through the connecting chains. The floating portion 6010 may be, but not limited to, a foam material, and by adjusting the size and position of the floating portion 6010, the user may adjust the horizontal end of the jet pipe 605 of the aeration mechanism 6 to a position close to the water surface in the sewage, so as to maximize the aeration effect. The connecting chains are made of plastics and can limit the position of the aeration mechanism 6 in the aeration tank 5.

The aerobic tank 7 is positioned at one side of the aeration tank 5 close to the fourth partition 503, the aerobic tank 7 is communicated with the aeration tank 5 through a second channel 504, and the sewage filled with oxygen in the aeration tank 5 can enter the aerobic tank 7 from the second channel 504. Nitrifying bacteria are cultured in the aerobic tank 7, and can oxidize carbon element oxidation compounds in the organic matters into carbon dioxide and water, oxidize nitrogen elements into nitrite nitrogen and nitrate nitrogen, and oxidize phosphorus elements into phosphate radicals, so that the organic matters in the sewage are further reduced.

The filtering tank 8 is positioned at one side of the aerobic tank 7 far away from the second channel 504, and the filtering tank 8 is communicated with the aerobic tank 7 through a third overflow port 702. The height of the partition below the third overflow port 702 is lower than that of the second partition 306, and water in the aeration tank 5 flows into the filter tank 8 from the third overflow port 702 after being filled with water. The filtration tank 8 includes a filtration mechanism including a filtration membrane group 801 and a filtration bucket 802.

The vertical setting of filtration membrane group 801 is in the filter vat 802 near the one side of third overflow mouth 702, and filtration membrane group 801 includes the filtration membrane of a plurality of vertical settings, and filtration membrane is the MBR membrane. The sewage flowing into the filtering tank 8 through the third overflow port 702 contains sludge generated after aerobic treatment, and the filtering membrane group 801 can block the sludge at one side of the filtering membrane group 801 far away from the filtering barrel 802.

The filtering barrel 802 includes an outer barrel layer 8021, a first filtering layer 8022, a second filtering layer 8023 and an inner barrel layer 8024 vertically arranged from outside to inside. The outer barrel layer 8021 and the inner barrel layer 8024 are provided with a plurality of through holes, the inner side of the inner barrel layer 8024 is a water purification cavity, the first filtering layer 8022 is an activated carbon layer, the second filtering layer 8023 is a sponge layer, and the thickness ratio of the first filtering layer 8022 to the second filtering layer 8023 is 2: 1.

A second water delivery mechanism 9 is arranged above the water purification cavity, and the second water delivery mechanism 9 includes a second water pump 901, a third connection pipe 902 and a fourth connection pipe 903. Third connecting pipe 902 and fourth connecting pipe 903 are both L-shaped pipes, and third connecting pipe 902 and fourth connecting pipe 903 both include horizontally arranged horizontal pipes and vertically arranged vertical pipes. The lower end of the vertical pipe of the third connecting pipe 902 extends into the water purification cavity, the horizontal pipe of the third connecting pipe 902 is fixedly connected with the water pumping port of the second water pump 901, the horizontal pipe of the fourth connecting pipe 903 is connected with the water outlet of the second water pump 901, and the vertical end of the fourth connecting pipe 903 is positioned on the side edge of the filtering tank 8 far away from one side of the aerobic tank 7.

The sewage treatment device can improve the conversion rate of sewage when solid-liquid separation is carried out. The first motor 201 that just reverses can let the drainage bucket 203 prolong clockwise and anticlockwise rotation in proper order, avoids the debris in the sewage to adhere to on the drainage bucket 203. The discharge opening 104 and the discharge volume 105 are designed to facilitate the user in cleaning the impurities separated from the sewage. The first and second

anoxic tanks

301 and 304 can provide sufficient anoxic treatment time and anoxic treatment space for the sewage. The aeration tank 5 is communicated with the aerobic tank 7 through the second channel 504, so that sufficient oxygen can be ensured in the sewage in the aerobic tank 7. The filtering mechanism can precisely filter the treated sewage, and a user can conveniently treat the sewage at the next stage. When the second water delivery mechanism 9 pumps out the water in the purified water cavity, a water pressure difference is generated inside and outside the filter barrel 802, and the sewage outside the purified water barrel enters the purified water cavity through the first filter layer 8022 and the second filter layer 8023 by the external water pressure, so that the automatic filtration of the sewage is realized.

According to another embodiment, a backflow mechanism 10 is arranged between the filtering tank 8 and the anoxic tank 3, the backflow mechanism 10 comprises a sludge backflow pump 1001, a fifth connecting pipe 1002 and a sixth connecting pipe 1003, and the sludge backflow pump 1001 is fixed at the upper end of the top plate of the filtering tank 8 through screws. Fifth connecting pipe 1002 and sixth connecting pipe 1003 are L-shaped pipelines, and fifth connecting pipe 1002 and sixth connecting pipe 1003 all include the vertical pipe of vertical setting and the horizontal pipe of horizontal setting. The lower end of the vertical end of the fifth connecting pipe 1002 extends into the lower part of one side of the filtering membrane group 801 far away from the filtering barrel 802, and the horizontal pipe of the fifth connecting pipe 1002 is fixedly connected with the input pipe of the sludge reflux pump 1001. The horizontal pipe of the sixth connecting pipe 1003 is fixedly connected with the output pipe of the sludge reflux pump 1001, and the vertical pipe of the sixth connecting pipe 1003 is inserted into the first anoxic tank 301. The return mechanism 10 puts the sludge filtered in the filtering tank 8 into the first anoxic tank 301. The sludge is rich in nitrate and nitrite generated during aerobic treatment, and the sludge is returned to the anoxic tank 3 to convert the nitrate and the nitrite into nitrogen, so that the nitrogen content in the sewage is reduced.

According to another embodiment, a floating ball 701 is thrown into the aerobic tank 7, and a biofilm beneficial to the growth of microorganisms is arranged on the surface of the floating ball 701.

In this embodiment, the second channel 504 is provided with a filter plate 505, and the filter plate 505 can prevent the sludge and the floating balls 701 in the aerobic tank 7 from entering the aeration tank 5 and affecting the normal operation of the aeration mechanism 6.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An apparatus for treating wastewater, comprising:

2. The sewage treatment apparatus of claim 1, wherein: the solid-liquid separation mechanism comprises a first driving mechanism and a water filtering barrel;

3. The sewage treatment apparatus according to claim 2, wherein: the aeration mechanism comprises a second motor, a rotating shaft, a plurality of first connecting rods, a first shell, a plurality of jet pipes, a second shell, an air inlet impeller, a third shell and a water inlet impeller, the second motor is fixedly arranged above the aeration tank, the rotating shaft of the second motor is vertically and downwards arranged, the rotating shaft is vertically arranged below the second motor, the upper end of the rotating shaft is coaxially fixed with the rotating shaft of the second motor, and the rotating shaft is fixedly connected with the plurality of first connecting rods, the air inlet impeller and the water inlet impeller from top to bottom;

4. A wastewater treatment plant according to claim 3, characterized in that: the filtering mechanism comprises a filtering membrane group and a filtering barrel;

5. The sewage treatment apparatus of claim 4, wherein: the first water delivery mechanism comprises a first water suction pump, a first connecting pipe and a second connecting pipe, the pretreatment tank is communicated with a water suction port of the first water suction pump through the first connecting pipe, and the first anoxic tank is communicated with a water outlet of the first water suction pump through the second connecting pipe;

the backflow mechanism comprises a sludge backflow pump, a fifth connecting pipe and a sixth connecting pipe, the filtering tank passes through the fifth connecting pipe and is communicated with the sludge backflow pump, and the sludge backflow pump passes through the sixth connecting pipe and is communicated with the first anoxic tank.

6. The sewage treatment apparatus of claim 5, wherein: and the second channel is provided with a filter plate.

7. The sewage treatment apparatus of claim 6, wherein: and a suspension ball is put into the aerobic tank.