CN207361930U - Sewage-treatment plant - Google Patents

Abstract

The utility model provides a kind of sewage-treatment plant; it is related to environment protection equipment field; including blowdown apparatus, waterworks and sewage-treatment plant; blowdown apparatus includes the first blowdown part, the second blowdown part, blowdown supervisor and blow down branch; sewage-treatment plant includes water treating pond, solids treatment pond and the first water storage box; waterworks include the second water storage box, feed pipe and water pumping mechanism; first blowdown part and the second blowdown part are connected by blowdown supervisor with solids treatment pond; first water storage box is connected with water treating pond, and the first water storage box is connected with the second water storage box.The system is separated the liquid in sewage and solid, and separately handled, the processing of sewage is by the way of aeration filtration, and filter the ceramic filter plate using inflation, good filtration effect and it will not block, sewage by filtering, which can reach, drinks rank, can save water resource, and solid waste can after treatment form methane and be used for burning.

Description

Sewage-treatment plant

Technical field

The utility model relates generally to environment protection equipment field, in particular to a kind of sewage-treatment plant.

Background technology

In recent years, country sewage is one of the main reason for causing China's regionality water pollution, and current Chinese society One of restraining factors of doctrine new countryside construction, because originals such as its pollution sources disperse, small scale, complicated component, water are discontinuous Cause, causes rural domestic sewage treatment difficult.And it is current, sewage disposal system is down-stream processing center mostly, by small city Town, the sewage collecting in rural area get up, then the conveying cost sent to large-scale wastewater treatment plant is excessive.But sanitary sewage is without processing Just directly discharge, not only polluted the water environment on periphery, waste substantial amounts of water resource.

China is a populous nation, and people in the countryside accounting is larger, and the sanitary sewage amount produced per capita is big, domestic right The research of technology for treating domestic sewage in rural area is later, and in recent years, with the enhancing of local economy strength, especially flourishing province exists Economic development progressively recognizes the importance of rural domestic sewage treatment problem to after certain phase, and start using The technology of practical, reasonable, low energy consumption and low operating cost carrys out treated sewage, and the low developed area of some labor intensives also recognizes Arrive, if not taking domestic sewage in rural areas effective processing, the series of problems of rural medical treatment and economic construction etc. can be triggered, The generation and diffusion of infectious disease are even caused, therefore, some domestic areas have carried out reality to the treatment technology method of country sewage Exploration is trampled, and achieves certain effect.China's domestic sewage in rural areas mainly has the characteristics that：It is distributed wide, scattered, village Scattered Characteristics of Geographical Distribution causes sewage to disperse, it is difficult to collects.Source is more, except the sewage from human faecal mass, kitchen generation Outside, household cleaning, house refuse stack the sewage produced.Increase fast, raising and rural area with life of farmers level Living-pattern preservation, sanitary sewage yield are consequently increased.The poorly efficient fruit for the treatment of effeciency is poor, present rural area mostly be in no matter The state ignored, without effective sewage treatment facility, and sewage treating efficiency is low.

In the prior art, there are some equipment handled country sewage, for example, Chinese patent：Life in the countryside is dirty Water treatment system (CN202865003U), the system include anaerobic digester, intake tunnel, drainage channel, biogas pipe；Water inlet is logical Road one end is connected with anaerobic digester, and the other end is sewage inlet；Drainage channel one end and anaerobic digester, the other end are purification The outlet of water afterwards；With being connected at the top of anaerobic digester, the other end is methane outlet for biogas pipe one end.The system be suitable for rural area with Village carries out sewage disposal for unit.And for example, Chinese patent：A kind of rural domestic sewage treatment case (CN205933397U), the dress Put and be made of babinet, cover plate and T-shaped partition plate：Mutually independent hydrolysis acidification is separated with by the T-shaped partition room of activity in babinet Room, catalytic oxidation room and mud chamber；Hydrolysis acidification room, catalytic oxidation room and mud chamber are sequentially communicated by communicating pipe；Hydrolysis acid Change in room and catalytic oxidation room and biomembrane floating ball string is equipped with by stent respectively.It is dirty that the waste water treatment box solves existing rural area Water treatment facilities have the problem of process chamber is laid out unreasonable, not readily transportable and cover plate poor sealing, security is poor.It is above-mentioned Two kinds of devices to a certain extent can be handled country sewage, but the effect unobvious of its processing, it is impossible to be provided Source recycles.

Utility model content

The purpose of this utility model is to provide a kind of sewage-treatment plant, it is effectively improved the problem of above-mentioned.

The utility model is realized in this way：

Based on above-mentioned purpose, the embodiment of the utility model provides a kind of sewage-treatment plant, including blowdown apparatus, gives Water installations and sewage-treatment plant, blowdown apparatus include the first blowdown part, the second blowdown part, blowdown supervisor and blow down branch, dirty Water treatment facilities includes water treating pond, solids treatment pond and the first water storage box, waterworks include the second water storage box, feed pipe and Water pumping mechanism, the first blowdown part and the second blowdown part are connected by blowdown supervisor with solids treatment pond, one end of blow down branch Supervisor connects with blowdown, and the other end of blow down branch is connected with water treating pond, and blow down branch can be received and is responsible for from blowdown Sewage, the first water storage box connects with water treating pond, and the first water storage box is connected by water pumping mechanism with the second water storage box, feed pipe One end connected with the second water storage box, the other end of feed pipe extends to the first blowdown part and the second blowdown part and feed pipe is used for Supply water for the first blowdown part and the second blowdown part；The position connected with blow down branch of blowdown supervisor is provided with separating plate, separates Plate is uniformly provided with multiple sorting holes, and the first cover board is covered with the top of water treating pond, is provided with water treating pond vertically The first partition and second partition for setting and being distributed side by side, water treating pond is divided into precipitation by first partition and second partition successively Pond, digestion pool and aeration filtration pond, multiple notches are offered at the top of first partition, and second partition is the ceramic filter of fine pore Plate, aeration filtration pond are connected by connecting tube with the first water storage box, and the level height of connecting tube is from the one end in aeration filtration pond Gradually reduced to one end of the first water storage box.

In the alternative embodiment of the utility model, above-mentioned sewage-treatment plant further includes apparatus of oxygen supply, apparatus of oxygen supply Including wind turbine, the first air hose and the second air hose, one end of the first air hose is connected with wind turbine, the other end insertion resolution of the first air hose In pond, one end of the second air hose is connected with wind turbine, in the other end insertion aeration filtration pond of the second air hose.

In the alternative embodiment of the utility model, ceramic filter is additionally provided with above-mentioned aeration filtration pond, ceramics Filter is that the box-structure formed, one end being located in aeration filtration pond of connecting tube and pottery are enclosed using polylith ceramic wafer The inside connection of porcelain filter, ceramic wafer are hollow structure, and one end of the remote wind turbine of the second air hose and the inside of ceramic wafer connect It is logical, and the second air hose is used to supply gas into ceramic wafer.

In the alternative embodiment of the utility model, above-mentioned water pumping mechanism includes water pump and what is connected with water pump draw water Pipe, water pump are arranged in the first water storage box, and one end of the remote water pump of drinking-water pipe is connected with the second water storage box.

In the alternative embodiment of the utility model, the first water-level gauge and the second water are provided with the second above-mentioned water storage box Position meter, the first water-level gauge are arranged at one end of the close bottom of the second water storage box, and the second water-level gauge is arranged at the second water storage box Close to the one end at top, the first water-level gauge is electrically connected with water pump and the first water-level gauge is used to control water pump to open, the second water-level gauge It is electrically connected with water pump and the second water-level gauge is used to control water pump to close.

In the alternative embodiment of the utility model, the second cover board, the second lid are covered with the top of above-mentioned solids treatment pond Plate offers mudhole and exhausting-gas hole, and mudhole is connected with blowdown supervisor, and exhausting-gas hole is connected with for indoor offer biogas Appendix, the centre position of cover board are provided with stirring parts, and stirring parts include actuator, rabble and multiple stirring sheets, actuator It is fixed on the second cover board, one end of rabble and the drive rod of actuator connect, and the other end of rabble is rotatably through the Two cover boards and the bottom for extending close to solids treatment pond, multiple stirring sheets are equidistantly set side by side along the length direction of rabble Put, solids treatment pond is formed using armored concrete is prefabricated, and fixing process pond is circular platform type, and the area of section in solids treatment pond It is gradually reduced from bottom to top.

Compared with prior art, the beneficial effects of the utility model are：

Sewage-treatment plant provided by the utility model, the liquid in sewage and solid are separated, and separate progress Processing, the processing of sewage filter the ceramic filter plate using inflation, good filtration effect by the way of aeration filtration And it will not block, the sewage by filtering can reach the rank drunk, and the present apparatus is gone back before being filtered Precipitation and resolution processing are carried out, the liquid finally obtained is fully achieved the standard used, can be used again, Ke Yijie About substantial amounts of water resource, and solid waste can after treatment form methane and be used for burning, the system is by the utilization of resource Maximize, and it is relatively simple for structure, and practical performance is high, is suitable for vast rural sewage treatment, can carry out substantial amounts of Promote.

Brief description of the drawings

Fig. 1 is the structure diagram for the sewage-treatment plant that the utility model embodiment provides；

The blowdown supervisor of Fig. 2 figures and the attachment structure schematic diagram of blow down branch；

Fig. 3 is the structure diagram of the water treating pond of Fig. 1；

Fig. 4 is the structure diagram in the solids treatment pond of Fig. 1；

Fig. 5 is the structure diagram of the waterworks of Fig. 1.

Icon：10- blowdown apparatus；11- the first blowdown parts；12- the second blowdown parts；13- blowdowns are responsible for；130- separating plates； 131- sorting holes；14- blow down branch；20- waterworks；The second water storage boxes of 21-；The first water-level gauges of 210-；The second water levels of 211- Meter；22- feed pipes；23- water pumping mechanisms；230- water pumps；231- drinking-water pipes；232- inductive switches；30- sewage-treatment plants；31- Water treating pond；310- first partitions；311- second partitions；312- sedimentation basins；313- digestion pools；314- aeration filtrations pond；315- Notch；316- ceramic filters；317- connecting tubes；The first cover boards of 318-；32- solids treatments pond；The second cover boards of 320-；321- is arranged Dirty hole；322- exhausting-gas holes；323- stirring parts；324- actuators；325- rabbles；326- stirring sheets；327- appendixs；33- One water storage box；330- gaps；331- protection networks；34- apparatuss of oxygen supply；340- wind turbines；The first air hoses of 341-；The second wind of 342- Pipe.

Embodiment

It refer to shown in Fig. 1, the embodiment of the utility model provides a kind of sewage-treatment plant, including blowdown apparatus 10th, waterworks 20 and sewage-treatment plant 30, blowdown apparatus 10 are used to be discharged in indoor sewage, and above-mentioned sewage includes The sewage and life sewage produced after excretion, sewage-treatment plant 30 are used for the processing for carrying out above two sewage.Feedwater dress Put 20 to be used to provide water used in everyday for people, the source of water can be by sewage-treatment plant 30 in waterworks 20 Water or other approach after reason, for example, precipitation, underground water and pond water etc..

Blowdown apparatus 10 includes the first blowdown part 11, the second blowdown part 12, blowdown supervisor 13 and blow down branch 14.First row Dirty 11 and second blowdown part 12 of part is connected by blowdown supervisor 13 and blow down branch 14 with sewage-treatment plant 30, and blowdown Branch pipe 14 can receive the sewage from blowdown supervisor 13.

First blowdown part 11 mainly includes hand washing sink in indoor squatting pan, closestool and lavatory etc., the second blowdown part 12 vegetable sinks mainly in kitchen, the floor drain being connected with washing machine etc..First blowdown part 11 and the second blowdown part 12 are by dirt Water is collected, and is discharged from blowdown supervisor 13 and blow down branch 14.

It refer to shown in Fig. 2, in the present embodiment, blowdown supervisor 13 is arranged to a lateral bending in one end close to its bottom Bent shape, the position connected with blow down branch 14 of above-mentioned blowdown supervisor 13 are provided with separating plate 130, and separating plate 130 is uniform Offer multiple sorting holes 131.Blow down branch 14 connects the position of blow down branch 14 to be responsible for curved position, because sewage exists Being responsible for curved position can be along curved side inner wall be responsible for flowing down, so setting separating plate 130, Ke Yiyou at the position The separation for carrying out solid and liquid in sewage of effect.The effect of separating plate 130 is to be divided the solid in sewage and liquid From so as to the follow-up purified treatment of separated progress and rationally utilization.It should be noted that due to separating it having carried out sewage Afterwards, solid waste is possible to be sticked on blow-off line, so being used as the excretion of solid waste by the use of the larger supervisor of caliber here Pipeline, and the discharge conduit using blow down branch 14 as liquid wastes, in addition, it is necessary to be set at 13 curved position of blowdown supervisor Manhole, easy to be handled when blowdown supervisor 13 blocks.

It refer to shown in Fig. 1, sewage-treatment plant 30 includes water treating pond 31, solids treatment pond 32, the first water storage box 33 With apparatus of oxygen supply 34, the first water storage box 33 is connected with water treating pond 31, and the sewage after the processing of water treating pond 31 is all emitted into In first water storage box 33, and stored.The first above-mentioned blowdown part 11 and the second blowdown part 12 are by blowdown supervisor 13 and admittedly Body processing pond 32 connects, and one end of the remote blowdown supervisor 13 of above-mentioned blow down branch 14 is connected with water treating pond 31.And supply oxygen Device 34 can be that oxygen is provided in water treating pond 31, bring it about oxidation reaction, can reach more preferable clean-up effect.It is above-mentioned Solid waste in first blowdown part 11 and the second blowdown part 12 is emitted into solids treatment pond 32, the first blowdown part 11 and second Liquid wastes in blowdown part 12 are then emitted into water treating pond 31, and solid waste and liquid waste are separated, and can be taken more Handled added with targetedly measure, and the effect handled is more preferable.

In the present embodiment, above-mentioned water treating pond 31 is formed or formed using masonry bond using concreting, and Waterproof layer is set in its inner wall, can prevent the leakage of water.The top of water treating pond 31 is covered with the first cover board 318, the first lid Plate 318 can be dismantled at any time, be convenient to carry out the cleaning and maintenance of water treating pond 31.

It refer to shown in Fig. 3, the first partition 310 being vertically distributed and second partition be provided with water treating pond 31 311, and first partition 310 and second partition 311 are parallel to each other or substantially parallel.First partition 310 and second partition 311 according to It is secondary that water treating pond 31 is divided into sedimentation basin 312, digestion pool 313 and aeration filtration pond 314, sedimentation basin 312 be mainly used for into The precipitation of row solid matter, the effect of digestion pool 313 are to carry out the oxidation reaction of sewage, can be by the organic matter in waste water progressively Simple inorganic matter is degraded into, also the pollutant being dissolved in the water can be oxidized to not soluble in water and be easy to be separated from the water Material out, easy to follow-up purified treatment.

The top of first partition 310 offers multiple notches 315, and sedimentation basin 312 is after being precipitated, and liquid is from first Flowed at the notch 315 at the top of partition plate 310 in digestion pool 313, most solid waste can be deposited to sedimentation basin 312 Bottom.Due to the separation of solid and liquid effect that sewage have passed through early period, so, the amount of solid of precipitation is less in sedimentation basin 312, can make Just cleared up afterwards with a very long time.

Second partition 311 is the ceramic filter plate of fine pore, can play good preliminary filtering function.By the ceramics After the filtering of filter plate, only contain a small amount of pollutant into the sewage in aeration filtration pond 314.

Above-mentioned apparatus of oxygen supply 34 includes wind turbine 340, the first air hose 341 and the second air hose 342, and the one of the first air hose 341 End is connected with wind turbine 340, in the other end insertion digestion pool 313 of the first air hose 341, under the action of wind turbine 340, and the first air hose 341 constantly can convey oxygen into digestion pool 313, make that oxidation reaction can be carried out in digestion pool 313, so as to reach resolution The effect of organic matter and harmful substance in sewage, meanwhile, the first air hose 341 can also make the liquid in digestion pool 313 continuous Seethe, can to second partition 311 produce cleaning action, avoid second partition 311 be blocked.One end of second air hose 342 Connected with wind turbine 340, in the other end insertion aeration filtration pond 314 of the second air hose 342.Likewise, in the effect of wind turbine 340 Under, the second air hose 342 can also convey oxygen into aeration filtration pond 314.

In the present embodiment, ceramic filter 316, ceramic filter 316 are additionally provided with above-mentioned aeration filtration pond 314 To enclose the box-structure formed using polylith ceramic wafer, which is the structure of sealing, and liquid can only be from ceramic wafer Trickle hole on pass through.One end being located in aeration filtration pond 314 of connecting tube 317 connects with the inside of ceramic filter 316 Logical, ceramic wafer is hollow structure, and one end of remote wind turbine 340 of the second air hose 342 is connected with the inside of ceramic wafer, and the second wind Pipe 342 is used to supply gas into ceramic wafer.

It should be noted that the effect of ceramic filter 316 here using active filtering, in the ceramic mistake of box After filter 316 is put into aeration filtration pond 314, due to being hollow, effect of the liquid in hydraulic pressure inside ceramic filter 316 Internal flow of the meeting to ceramic filter 316, at this time, ceramic wafer can play the role of filtering, and ceramic wafer exists in order to prevent Constantly it is blocked during filtering, and air is blown into ceramic wafer, makes air constantly by ceramic wafer and exterior sewage The solid adhered in the one side of contact is blown off, while can also make aeration filtration pond to the air of flows outside among ceramic wafer Liquid flowing in 314, the liquid of flowing can equally play the souring to 316 outer surface of ceramic filter, prevent from blocking up Plug, and improve filter efficiency.

Aeration filtration pond 314 is connected by connecting tube 317 with the first water storage box 33, and the level height of connecting tube 317 from One end of the one end in aeration filtration pond 314 to the first water storage box 33 gradually reduces, and the water filtered by ceramic filter 316 can be with Flow directly into the first water storage box 33, can be preserved from connecting tube 317, secondary use can also be carried out.

It refer to shown in Fig. 4, in the present embodiment, the top in above-mentioned solids treatment pond 32 is covered with the second cover board 320, the Two cover boards 320 can be dismantled at any time, can in order to which treated material in solids treatment pond 32 is reused To be used as farm manure, to reduce the use of even replacing fertilizer.

Second cover board 320 offers mudhole 321 and exhausting-gas hole 322, and mudhole 321 is connected with blowdown supervisor 13, solid Waste enters from mudhole 321.Exhausting-gas hole 322 is connected with for the appendix 327 of indoor offer biogas, being produced through everfermentation Biogas can be utilized, and biogas is a kind of cleaner energy, very environmental protection.

The centre position of cover board is provided with stirring parts 323, and the effect of stirring parts 323 is to carry out stirring in solids treatment pond 32 Mix, the solid in solids treatment pond 32 is preferably carried out fermentation, avoid local accumulation.Specifically, stirring parts 323 are wrapped Actuator 324, rabble 325 and multiple stirring sheets are included, actuator 324 here is motor；Actuator 324 is fixed on second Cover board 320, one end of rabble 325 are connected with the drive rod of actuator 324, and the other end of rabble 325 rotatably passes through Second cover board 320 and the bottom in solids treatment pond 32 is extended close to, multiple stirring sheets are along between length direction of rabble 325 etc. , can be to the solid of different height in solids treatment pond 32 in the stirring sheet that 325 diverse location of rabble is set away from being arranged side by side It is stirred.Certainly, which is not all to operate always, can be opened every a period of time, to save electric energy. It can be judged by the gas output of biogas, when gas output reduces, stirring parts 323 can be opened.

In the present embodiment, above-mentioned solids treatment pond 32 is formed using armored concrete is prefabricated, can accelerate installation speed Degree, and its waterproof, Corrosion Protection are more preferable.Fixing process pond is circular platform type, and the area of section in solids treatment pond 32 is the bottom of from Portion is gradually reduced to top, since solids treatment pond 32 can produce biogas during being handled, is arranged to truncated cone-shaped, just In the collection for carrying out biogas.

It refer to shown in Fig. 1 and Fig. 5, waterworks 20 include the second water storage box 21, feed pipe 22 and water pumping mechanism 23, give One end of water pipe 22 is connected with the second water storage box 21, and the other end of feed pipe 22 extends to the first blowdown part 11 and the second blowdown part 12, and feed pipe is used to supply water for the first blowdown part 11 and the second blowdown part 12.First water storage box 33 passes through water pumping mechanism 23 Connected with the second water storage box 21, that is to say, that waterworks 20 can provide domestic water, can also be by the first water storage box 33 Treated water is delivered in the second water storage box 21, and the second water storage box 21 is generally arranged at roof, in the second water storage box 21 Water is not required power-equipment directly can release use by feed pipe 22.

In the present embodiment, above-mentioned water pumping mechanism 23 includes water pump 230 and the drinking-water pipe 231 connected with water pump 230, water Pump 230 is arranged in the first water storage box 33, and one end of the remote water pump 230 of drinking-water pipe 231 is connected with the second water storage box 21.Can be with The water in first water storage box 33 is transported in the second water storage box 21 by water pump 230.

In the present embodiment, the first water-level gauge 210 and the second water-level gauge 211 are provided with the second above-mentioned water storage box 21, First water-level gauge 210 and the second water-level gauge 211 can perceive the water level in the second water storage box 21.Specifically, the first water-level gauge 210 One end of the close bottom of the second water storage box 21 is arranged at, the second water-level gauge 211 is arranged at the close top of the second water storage box 21 One end, be provided with inductive switch 232 on water pump 230, inductive switch 232 can control the opening and closing of water pump 230, first 210 and second water-level gauge 211 of water-level gauge is electrically connected with inductive switch 232, when the water level in the second water storage box 21 is less than first When water-level gauge 210, the water level signal perceived is sent to inductive switch 232, inductive switch 232 by the first water-level gauge 210 Control water pump 230 is opened, and the water level in the second water storage box 21 constantly rises, when the water level in the second water storage box 21 reaches second When water-level gauge 211, the second water-level gauge 211 transmits a signal to inductive switch 232, and inductive switch 232 controls water pump at this time 230 close, so circulation, can realize the automatic water-storage of the second water storage box 21.It should be noted that used in early period when Wait, it is necessary to first fill the water in the second water storage box 21, avoid water pump 230 from being damaged because of idle running.

In the present embodiment, one end at the top of it of the side wall of the first above-mentioned water storage box 33 is provided with gap 330, gap 330 is provided with protection network 331.When the water in the first water storage part is filled, without into the second water storage box 21 When conveying water, treated water can be discharged directly from gap 330, and protection network 331 can prevent the different of outside Thing enters in the first water storage box 33 and causes pollution.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.

Claims (4)

1. a kind of sewage-treatment plant, it is characterised in that including blowdown apparatus (10), waterworks (20) and sewage-treatment plant (30), blowdown apparatus (10) includes the first blowdown part (11), the second blowdown part (12), blowdown supervisor (13) and blow down branch (14), sewage-treatment plant (30) includes water treating pond (31), solids treatment pond (32) and the first water storage box (33), waterworks (20) the second water storage box (21), feed pipe (22) and water pumping mechanism (23), the first blowdown part (11) and the second blowdown part are included (12) it is responsible for (13) by blowdown to connect with solids treatment pond (32), one end and the blowdown supervisor (13) of blow down branch (14) connect Logical, the other end of blow down branch (14) is connected with water treating pond (31), and blow down branch (14) can be received and is responsible for from blowdown (13) sewage, the first water storage box (33) are connected with water treating pond (31), the first water storage box (33) by water pumping mechanism (23) with Second water storage box (21) connects, and one end of feed pipe (22) is connected with the second water storage box (21), and the other end of feed pipe (22) prolongs Extend the first blowdown part (11) and the second blowdown part (12) and feed pipe (22) is used to be the first blowdown part (11) and the second blowdown Part (12) supplies water；Blowdown supervisor (13) is provided with separating plate (130), separating plate (130) with the position that blow down branch (14) connects Multiple sorting holes (131) are uniformly provided with, the first cover board (318), water treating pond (31) are covered with the top of water treating pond (31) Inside be provided with the first partition (310) for vertically setting and being distributed side by side and second partition (311), first partition (310) and Water treating pond (31) is divided into sedimentation basin (312), digestion pool (313) and aeration filtration pond by second partition (311) successively (314), multiple notches (315) are offered at the top of first partition (310), second partition (311) is the ceramic filter of fine pore Plate, aeration filtration pond (314) are connected by connecting tube (317) with the first water storage box (33), and the level height of connecting tube (317) One end from from the one end of aeration filtration pond (314) to the first water storage box (33) gradually reduces.

2. sewage-treatment plant according to claim 1, it is characterised in that sewage-treatment plant (30) further includes oxygen supply dress Put (34), apparatus of oxygen supply (34) includes wind turbine (340), the first air hose (341) and the second air hose (342), the first air hose (341) One end is connected with wind turbine (340), in the other end insertion digestion pool (313) of the first air hose (341), the one of the second air hose (342) End is connected with wind turbine (340), in other end insertion aeration filtration pond (314) of the second air hose (342).

3. sewage-treatment plant according to claim 1, it is characterised in that water pumping mechanism (23) include water pump (230) and The drinking-water pipe (231) connected with water pump (230), water pump (230) are arranged in the first water storage box (33), drinking-water pipe (231) it is remote One end from water pump (230) is connected with the second water storage box (21).

4. sewage-treatment plant according to claim 3, it is characterised in that be provided with the first water in the second water storage box (21) Position meter (210) and the second water-level gauge (211), the first water-level gauge (210) are arranged at the one of the close bottom of the second water storage box (21) End, the second water-level gauge (211) are arranged at the one end at the close top of the second water storage box (21), the first water-level gauge (210) and water pump (230) it is electrically connected and the first water-level gauge (210) is used to control water pump (230) to open, the second water-level gauge (211) and water pump (230) It is electrically connected and the second water-level gauge (211) is used to control water pump (230) to close.