CN117023865A

CN117023865A - Self-cleaning fish culture sewage treatment system

Info

Publication number: CN117023865A
Application number: CN202311020699.3A
Authority: CN
Inventors: 梁涛
Original assignee: Engineering Construction Branch Of Qinghai Upper Yellow River Hydropower Development Co ltd
Current assignee: Engineering Construction Branch Of Qinghai Upper Yellow River Hydropower Development Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-11-10

Abstract

The application relates to a self-cleaning fish culture sewage treatment system, which belongs to the field of sewage treatment and comprises the following components: a runway pool; a circulating water treatment unit for purifying sewage to be suitable for vegetable growth; the three-dimensional planting unit is arranged at the top of the runway pool and is used for planting vegetables; the side wall of the backflow channel is provided with a water return pipe, and the other end of the water return pipe is connected with the planting unit; a sewage treatment unit for purifying sewage to be suitable for plant growth; the fertilizer water storage tank is used for storing the fertilizer water purified by the sewage treatment unit; the sewage collecting pool is used for storing large-particle organic matters filtered out by the sewage treatment unit. The application can supply enough vegetables to the cultivation staff in the island, and can fully utilize the nutrient substances in the fish cultivation sewage, thereby reducing the waste of resources in the sewage.

Description

Self-cleaning fish culture sewage treatment system

Technical Field

The application relates to the field of sewage treatment, in particular to a self-cleaning fish culture sewage treatment system.

Background

In recent years, the rise of the facility fishery mainly for intensive cultivation conforms to the trend of the development of the fishery at the current stage, and is a new economic growth point for the continuous and steady development of the fishery. The intensive circulating water culture technology is the most concentrated representative of the fishery high-tech technology, has the advantages of electricity and water saving, land saving, less pollution emission and the like, has high resource utilization rate, high quality and safety of products, less diseases, realizes high yield, high return and high benefit, and is the development direction of the fishery in the world.

The intensive circulating water culture technology can treat the culture sewage, and after the pollutants such as suspended matters, organic matters and the like in the sewage are removed through layer-by-layer purification, the treated water is introduced into the culture pond again for cyclic utilization, so that the ecological environment is prevented from being damaged by the high-nitrogen organic wastewater. Solves the serious damage of water environment and water ecology system caused by the random discharge of fish culture tail water.

The artificial island is used as an emerging technical means, provides more habitats and food sources for marine organisms, makes positive contribution for protecting the marine ecological environment, and accords with the national development strategy. In addition, because the fresh water resources on the artificial islands are scarce, the intensive circulating water culture technology is implemented on the artificial islands to culture the freshwater fish, so that the freshwater utilization rate is improved, and the method has very important significance.

Aiming at the related technology, on one hand, the fresh water resources of the artificial island are scarce, and the common vegetable planting has larger demand for fresh water, so that the vegetable planting in the island is difficult; and also it is inconvenient to transport vegetables into the island, making it difficult for the farmers in the island to obtain a sufficient supply of vegetables. On the other hand, the fish culture sewage contains nutrient substances such as nitrogen, phosphorus, potassium, magnesium, trace elements and the like, and the utilization of the nutrient substances in the sewage cannot be realized by applying the intensive circulating water culture technology to fish culture, so that the resource waste is caused.

Disclosure of Invention

The application provides a self-cleaning fish culture sewage treatment system, which not only can supply enough vegetables to the culture personnel in the island, but also can fully utilize the nutrient substances in the fish culture sewage so as to reduce the waste of resources in the sewage.

The self-cleaning fish culture sewage treatment system provided by the application adopts the following technical scheme:

a self-cleaning fish farming wastewater treatment system comprising:

the runway pool is used for fish living, the bottom of the runway pool is obliquely arranged, and the tail of the runway pool is provided with a conical groove;

the water return channel is arranged at the tail part of the runway pool and is obliquely arranged along the length direction of the water return channel;

the circulating water treatment unit is arranged at the tail part of the water return channel and is used for purifying sewage until the sewage is suitable for vegetable growth;

the three-dimensional planting unit comprises a support frame, wherein the support frame is erected at the top of the runway pool, and a water planting groove is formed in the support frame and is used for planting vegetables;

the pump pool is arranged at the tail part of the circulating water treatment unit and used for temporarily storing water purified by the circulating water treatment unit, and a lifting pump is fixedly arranged on the side wall of the pump pool and used for conveying water in the pump pool into the three-dimensional planting unit;

The backflow channel is arranged at the tail part of the pump pool, the backflow channel is provided with an ultraviolet sterilization device, the side wall of the backflow channel is provided with a water return pipe, and the other end of the water return pipe is connected with the three-dimensional planting unit;

the sewage treatment unit is arranged at the tail part of the water return channel and buried underground and is used for purifying sewage until the sewage is suitable for vegetable growth;

the fertilizer water storage pool is arranged at the tail part of the sewage treatment unit and buried underground, is used for storing fertilizer water purified by the sewage treatment unit and providing a water source for a greenhouse and a greening irrigation system;

the sewage collecting pool is arranged at the head part of the sewage treatment unit and is used for storing large-particle organic matters filtered out by the sewage treatment unit and providing fertilizers for the greenhouse.

Through adopting above-mentioned technical scheme, when carrying out the treatment to fish cultivation sewage, fish cultivation sewage flows to the back in the ditch along the incline direction in runway pond at first to through depositing the layering when the toper recess with large granule pollutant stay the toper recess inside, thereby realize the preliminary filtration of cultivation sewage. The sewage after preliminary filtration moves into the circulating water treatment unit along the inclined direction of the water return channel, the sewage is deeply purified in the circulating water treatment unit to be suitable for vegetable growth, the sewage after deep purification is temporarily stored into the pump pool, and then the water in the pump pool is conveyed into the three-dimensional planting unit through the lifting pump for water planting.

The sewage treated by the circulating water treatment unit contains a proper amount of nutrient substances, is suitable for water culture of vegetables, and can realize utilization of the nutrient substances in the fish culture sewage. In particular, in the case of fish farming in areas where it is inconvenient to transport agricultural products such as vegetables, etc., such as artificial islands, it is necessary to solve not only the problem of ecological environmental destruction caused by random discharge of farming sewage but also the problem of how to supply agricultural products such as vegetables to workers in islands. The technical scheme can solve the problem of vegetable supply on artificial island making by utilizing the cultivation tail water for vegetable cultivation.

The purified water purified by the water culture tank flows into the backflow canal through the water return pipe, and the purified water flowing into the backflow canal is sterilized and disinfected by the ultraviolet sterilization device in the backflow canal, so that the water quality is more suitable for fish life, and the sterilized water flows back into the runway pool, thereby realizing the recycling of the aquaculture sewage.

In addition, when the cultivation sewage is circularly purified, a small part of cultivation sewage flows into the sewage treatment unit along the water return channel, and the sewage is purified in the sewage treatment unit until the water quality is suitable for vegetable growth. And in the purification process, the filtered large-particle organic matters are stored in a sewage collecting tank, and the purified fertilizer water is stored in an underground fertilizer water storage tank. The underground fat water storage tank keeps warm by utilizing geothermal heat, and the warm fat water provides a water source for vegetables in a greenhouse and a greening irrigation system, so that sufficient vegetables can be provided for farmers in winter, and the greening requirement can be met. And the high-nutrition organic wastes such as large-particle residual baits, faeces and the like stored in the sewage collecting tank are used as organic fertilizer for irrigation after being composted, so that the full utilization of nutrient substances in sewage is realized.

In conclusion, the culture sewage treatment system realizes the recycling of fresh water and saves fresh water resources on the basis of basically realizing zero discharge of culture sewage; and the nutrient substances in the sewage are utilized for vegetable planting, so that the nutrient substances in the sewage can be fully utilized, the vegetable supply problem of the cultivation personnel can be solved, and the dependence on external logistics is reduced. In addition, in the aspect of the treatment of vegetable planting problems, the influence of climate factors is fully considered, sewage is subjected to classification treatment, and the underground fertilizer water storage pool is used for preserving and preserving irrigation water in winter so as to provide a water source for winter vegetable irrigation, so that the dependence on climate is reduced, and vegetable supply of farmers is still ensured in winter. Thereby realizing full and reasonable utilization of nutrient substances in the fish culture sewage, reducing the waste of resources in the sewage and having excellent sewage treatment effect.

Optionally, the circulating water treatment unit includes:

the micro-filter pool is arranged at the tail part of the water return channel, a micro-filter body is arranged in the micro-filter pool, a connecting pipe is arranged at the water inlet of the micro-filter body, the other end of the connecting pipe is connected to the side wall of the water return channel, and a water suction pump is arranged on the connecting pipe;

The moving bed biological film purifying tank is arranged between the micro-filter tank and the pump tank.

By adopting the technical scheme, sewage in the water return channel enters the micro-filter tank along the connecting pipe, the sewage in the water return channel is subjected to preliminary solid-liquid separation in the micro-filter tank, the sewage after preliminary filtration flows into the moving bed biomembrane purifying tank, porous annular filler in the biomembrane purifying tank is used for microorganism adhesion growth, and organic wastes suspended in a water body are decomposed into micromolecular organic matters, inorganic salts and the like for plant growth absorption. Purified water flows into a pump pool for storage so as to provide a water source for the subsequent water-cultured vegetables.

Optionally, the stereoscopic planting unit further includes:

the head water storage tank is arranged at the head of the support frame and is higher than the support frame, the head water storage tank is provided with a water culture water delivery pipe, the end part of the water culture water delivery pipe is connected with the pump pool, the lifting pump is arranged on the water culture water delivery pipe, the side wall of the head water storage tank is provided with a water culture connecting pipe I, the end part of the water culture connecting pipe I is connected with the water culture tank, and the water culture connecting pipe I is provided with a water flow regulating valve I;

the tail water storage tank is arranged at the tail of the support frame and is lower than the support frame in height, the tail water storage tank is provided with a water planting connecting pipe II, a water flow regulating valve II is arranged on the water planting connecting pipe II, the two end parts of the water planting connecting pipe II are connected with the water planting groove, the side wall of the tail water storage tank is provided with a circulating water pipe, a water pumping device is arranged on the circulating water pipe, and the end part of the circulating water pipe is connected with the head water storage tank;

The end part of the water return pipe is connected with the side wall of the head water storage tank, and the water return pipe is provided with a water drain valve.

Through adopting above-mentioned technical scheme, at first the elevator pump with the water extraction in the pump sump to the head water storage tank in keep in, then through water self gravity, make planting water along water planting connecting pipe one get into in the water planting groove, provide the nutrient substance for the vegetables growth. In addition, due to the gravity of water, water in the water culture tank flows into the tail water storage tank along the water culture connecting pipe for temporary storage.

Meanwhile, the water in the tail water storage tank is pumped back to the head water storage tank by using the water pumping equipment, so that the water in the water culture tank is in a flowing state, on one hand, the flowing water can take away waste and provide oxygen, and the growth and development of vegetables are facilitated; on the other hand, the fertilizer can also help the root system to absorb nutrients and promote plant growth.

Then, by opening the drain valve, the purified water is caused to flow into the return channel along the return pipe.

Optionally, the sewage treatment unit includes:

the full-automatic purifying tank is provided with a first water inlet pipe, one end part of the first water inlet pipe is connected with the water return channel, the sewage collecting tank is arranged at the bottom of the full-automatic purifying tank, a communication pipeline is arranged at the bottom of the full-automatic purifying tank, the communication pipeline extends into the sewage collecting tank, a micro-filter is arranged in the full-automatic purifying tank, and the communication pipeline is connected with a solid discharge port of the micro-filter;

The dryer is arranged in the sewage collecting tank, and the communication pipeline is connected with a feed inlet of the dryer;

the first-stage purifying tank is arranged at the tail part of the full-automatic purifying tank, the first-stage purifying tank is provided with a water inlet pipe II, the two end parts of the water inlet pipe II are connected with the full-automatic purifying tank, and an aeration pipe I is arranged in the first-stage purifying tank;

the head of the secondary purifying tank is connected and communicated with the tail of the primary purifying tank, the tail of the secondary purifying tank is connected and communicated with the fertilizer water storage tank, and an aeration pipe II is arranged in the secondary purifying tank.

Through adopting above-mentioned technical scheme, water in the return canal gets into full-automatic purification pond along inlet tube one in to through the microfilter in the pond, make sewage preliminarily realize solid-liquid separation, and in getting into the drying-machine in the dirty pond of collection with large granule organic matter (mainly incomplete bait, fish excrement) in the sewage through communicating pipe, use the drying-machine to carry out drying treatment to large granule organic matter, dispose unnecessary moisture in the large granule organic matter, the big granule organic matter after the stoving is accomplished is stored in the dirty pond of collection and is carried out compost treatment, the fertilizer of production is used for the planting of vegetables in the follow-up warmhouse booth, provide the nutrient for the vegetable growth, and then realize the make full use of nutrient substance in the sewage.

The sewage filtered by the micro-filter enters the primary purifying tank along the second water inlet pipe, is treated in the primary purifying tank, and flows into the secondary purifying tank. Wherein, the first aeration pipe and the second aeration pipe are both used for providing oxygen into the sewage and promoting the growth and metabolism of biological flora so as to accelerate the degradation and purification of the sewage; in addition, the aeration pipe can also form certain water flow dynamic in water, so that the suspended state of organic substances and sludge in sewage is maintained, the contact area between microorganisms and the organic substances is increased, and the treatment efficiency is improved.

Finally, the fertilizer water which accords with the greening water standard after being purified by the primary purifying tank and the secondary purifying tank is discharged into the fertilizer water storage tank for unified storage, so that nutrient solution is provided for soilless culture of the greenhouse, and organic vegetables are produced; and the residual water is used for greening irrigation of flowers, plants and trees after being connected into a greening irrigation system. Thereby further fully and reasonably utilizing the sewage.

Optionally, the self-cleaning device further comprises a self-cleaning unit, the self-cleaning unit comprising:

the cleaning water tank is provided with a water supply pipeline, the end part of the water supply pipeline is connected and communicated with the water supply channel, and the water supply pipeline is provided with a water supply pump;

A first flushing pipeline is arranged along the length direction of the water return channel, and one end part of the first flushing pipeline is provided with a water delivery pump for supplying water for the first flushing pipeline;

the flushing device is arranged along the length direction of the flushing pipeline I, the end part of the flushing device is connected to the side wall of the return channel in a sliding manner, and the flushing device is used for cleaning the inner wall of the return channel in the sliding manner along the length direction of the return channel;

the high-pressure water pipe is arranged between the first flushing pipeline and the flushing device, and is provided with a high-pressure water pump which is used for pressurizing water and spraying the high-pressure water from the flushing device;

and one end of the flushing pipeline II is connected and communicated with the cleaning water tank, and the other end of the flushing pipeline II is connected with the automatic flushing device on the micro-filter body and is used for conveying water in the cleaning water tank into the automatic flushing device.

By adopting the technical scheme, firstly, clean water in the return channel is conveyed into the clean water tank along the water supply pipeline through the water supply pump. And then, water is sent into the automatic flushing device through the flushing pipeline, so that the micro-filter body can be conveniently flushed and cleaned. In addition, the water is pumped into the flushing pipeline I through the water delivery pump, the water is pressurized through the high-pressure water pump, and the high-pressure water is sprayed out of the flushing device, so that the inner wall of the return channel is cleaned.

Because the return channel is arranged at a position close to the culture pond, the content of impurities such as silt in sewage flowing into the return channel is high, and the inner wall of the return channel needs to be cleaned so as to keep the inner wall of the return channel clean. In addition, the microfilter body also needs to be cleaned on its own with an automatic flushing device.

The device is used for flushing the return channel and the micro-filter body, so that on one hand, sewage can be further fully and reasonably utilized; on the other hand, the self-cleaning of the return channel and the self-cleaning of the auxiliary micro-filter body are realized.

Optionally, the flushing device includes:

the water spraying pipeline is connected and communicated with the high-pressure water pipe, and a water outlet is formed along the axial direction of the water spraying pipeline;

the front nozzle is obliquely arranged relative to the bottom wall of the water return channel and is connected with a water outlet on the water spraying pipeline;

the rear nozzle is obliquely arranged relative to the bottom wall of the return channel, is opposite to the front nozzle in the oblique direction and is connected to the water outlet of the water spraying pipeline;

the electromagnetic valve is arranged at the water outlet of the water spraying pipeline and is used for controlling the flow direction of the high-pressure water.

Through adopting above-mentioned technical scheme, because high-pressure water strikes on the return channel diapire, can produce recoil force to the spray pipe simultaneously for washing unit moves along the length direction of return channel, enlarges washing unit's washing scope. The inclination directions of the front nozzle and the rear nozzle are opposite, and the electromagnetic valve is controlled to realize the ejection of high-pressure water from the front nozzle or the ejection of high-pressure water from the rear nozzle. The flushing device moves back and forth along the length direction of the return channel, the flushing range of the flushing device is enlarged, and the flushing device is convenient to flush the inner wall of the return channel.

Therefore, the flushing device not only can clean the wall of the return channel, but also can provide power for the movement of the flushing device by virtue of the impulsive force of high-pressure water, thereby saving energy consumption.

Optionally, the self-cleaning unit further comprises an insulation layer, which is wrapped outside the first flushing pipeline and used for insulating water inside the first flushing pipeline;

the cleaning water tank is buried underground.

Through adopting above-mentioned technical scheme, utilize geothermal heat to keep warm clean water tank, utilize the heat preservation to keep warm flushing pipe one, be convenient for make self-cleaning unit under the lower circumstances of temperature such as winter still can continuous operation.

Optionally, the high-pressure water pipe includes:

the hard pipe part is connected and communicated with the flushing pipeline I at one end, and the high-pressure water pump is arranged on the hard pipe part and fixedly connected with the side wall of the water return channel;

and one end of the hose part is connected and communicated with the hard pipe part, the other end of the hose part is connected and communicated with the flushing device, and the hose part is a telescopic hose.

Through adopting above-mentioned technical scheme, can realize setting up high-pressure water pump at the return channel lateral wall, when washing unit moves along the length direction of return channel, compare conventionally with high-pressure water pump setting up on washing unit, resistance when above-mentioned technical scheme has alleviateed washing unit motion.

Drawings

FIG. 1 is a modular flow diagram of an embodiment of the present application.

Fig. 2 is a partial construction diagram for highlighting a stereoscopic planting unit in an embodiment.

Fig. 3 is a schematic diagram for highlighting the positional relationship between the respective units in the embodiment.

FIG. 4 is a cross-sectional view showing the culture pond according to the embodiment.

FIG. 5 is a schematic illustration of an embodiment for highlighting a head reservoir.

Fig. 6 is a cross-sectional view of the embodiment for highlighting the water outlet.

FIG. 7 is a flow chart showing the process of treating sewage in the circulating water treatment unit according to the embodiment.

Fig. 8 is a schematic diagram for highlighting the relative positional relationship between the respective units in the embodiment.

Fig. 9 is a sectional view of section A-A of fig. 8.

Fig. 10 is a sectional view of section A-A of fig. 8.

FIG. 11 is a flow chart showing a sewage treatment process performed in the sewage treatment unit according to the embodiment.

Reference numerals illustrate: 1. a runway pool; 11. a culture pond; 111. a fish blocking net; 12. a conical groove; 121. a blow-down pipe; 122. a cannula; 13. a return channel; 131. a gate; 132. a filter screen; 2. a circulating water treatment unit; 21. a microfilter cell; 211. a microfilter body; 212. a connecting pipe; 22. overhauling the bypass channel; 23. moving bed biological film purifying pool; 231. a filter material blocking net; 24. a pump pool; 3. a sewage treatment unit; 31. a full-automatic purifying tank; 311. a first water inlet pipe; 32. a sewage collecting pool; 321. a dryer; 322. a communication pipe; 33. a service passage; 331. an access panel; 332. an overhaul ladder; 34. a primary purifying tank; 341. a water inlet pipe II; 342. an aeration pipe I; 35. a secondary purifying tank; 351. a water passing tank; 352. an aeration pipe II; 36. a fat water storage tank; 361. a water inlet pipe III; 4. a stereoscopic planting unit; 41. a support frame; 411. a water culture tank; 42. a head reservoir; 421. a water culture water delivery pipe; 422. a lift pump; 423. a first water planting connecting pipe; 43. a tail water storage tank; 431. a second water planting connecting pipe; 44. a circulating water pipe; 45. a water return pipe; 46. a return channel; 461. an axial flow pump; 47. a water supply channel; 48. a diversion channel; 481. a lower water outlet type baffle wall; 5. a flushing device; 51. a water spraying pipeline; 52. a water outlet; 53. a front nozzle; 54. a rear nozzle; 6. a self-cleaning unit; 61. cleaning the water tank; 62. a water supply pipe; 63. flushing the first pipeline; 64. and (5) a heat-insulating shell.

Detailed Description

The application is described in further detail below with reference to fig. 1-11.

The embodiment of the application discloses a self-cleaning fish culture sewage treatment system. Referring to fig. 1, the self-cleaning fish culture sewage treatment system comprises a runway pool 1, wherein the runway pool 1 is used for fish living, and a sewage treatment unit 3 and a circulating water treatment unit 2 are arranged at the tail part of the runway pool 1 so as to refine culture sewage. Wherein 95% of the cultivation sewage is introduced into the circulating water treatment unit 2 for preliminary purification treatment, the tail part of the circulating water treatment unit 2 is provided with the three-dimensional planting unit 4, and after the circulating water treatment unit 2 treats the cultivation sewage to the water quality suitable for vegetable cultivation, the cultivation sewage is introduced into the three-dimensional planting unit 4, so that on one hand, the water cultivation of vegetables is realized, and on the other hand, the purification of the cultivation sewage is realized. Finally, purified water purified by the three-dimensional planting unit 4 flows into the runway pool 1 again, so that the recycling of fresh water is realized, and the full and reasonable utilization of nutrient substances contained in the sewage is realized. In addition, 5% of the cultivation sewage is introduced into the sewage treatment unit 3 for treatment, the treated sewage is converted into fertilizer water and organic matter compost, wherein the fertilizer water is introduced into a greenhouse and a greening irrigation system to provide nutrients for vegetables, flowers, plants and trees, and the organic matter compost is used for the greenhouse to provide sufficient nutrients for organic vegetables.

Referring to fig. 2, 3 and 4, the raceway pond 1 includes a culture pond 11 and a tapered groove 12, the culture pond 11 is configured to have a groove shape with a certain length, swimming fishes can swim conveniently, and the culture ponds 11 are arranged in parallel with each other. And reduce and set up breed pond 11 for breed pond 11 half is located underground, and half is located on the ground, can reduce accuse temperature energy consumption with the help of soil heat preservation, can share the horizontal atress of pool wall again, reduces construction cost, and the overground part is 1 meter higher than the ground, can also be as safety barrier. Two ends of the culture pond 11 are provided with fish blocking nets 111 for blocking fish in the culture pond 11. In addition, the bottom of the culture pond 11 is provided with a 1% gradient along the water flow direction, so that the water flow can wash waste in the culture pond 11 to the conical groove 12 at the tail of the culture pond 11, and the conical groove 12 is used for accumulating the waste. The bottom of the conical groove 12 is horizontally provided with a drain pipe 121, the drain pipe 121 is parallel to the width direction of the culture pond 11, one end of the drain pipe 121 extends to the outside of the conical groove 12, a plurality of drain holes are formed along the axial direction of the drain pipe 121, the drain pipe 121 is vertically inserted with an insertion pipe 122 corresponding to each drain hole, and the height of the insertion pipe 122 is slightly higher than the liquid level of the culture pond 11. When the impurities in the sewage draining groove are required to be drained, the insertion pipe 122 is pulled out from the sewage draining pipe 121, so that the impurities can enter the sewage draining pipe 121 along the sewage draining hole and flow out along the sewage draining pipe 121.

Referring to fig. 2, 3 and 4, the tail parts of the conical grooves 12 are commonly connected with the same water return channel 13, the length direction of the water return channel 13 is perpendicular to the length direction of the culture pond 11, a gate 131 vertically slides at the joint of the water return channel 13 and the conical grooves 12, and a filter screen 132 is fixedly arranged on the top wall of the conical grooves 12 parallel to the gate 131. The cultivation sewage enters the conical groove 12, heavy pollutants are deposited at the bottom of the conical groove 12, the sewage is positioned at the middle upper part of the conical groove 12, and the gate 131 vertically moves downwards, so that the sewage at the top of the conical groove 12 firstly passes through the filter screen 132 and then enters the return channel 13. The bottom wall of the return channel 13 is inclined along the length direction so as to facilitate the sewage to flow towards the tail of the return channel 13. Although the sewage flowing into the return channel 13 has been preliminarily filtered in the tapered recess 12, it still contains a large amount of impurities, and therefore, a plurality of flushing devices 5 are provided along the length direction of the return channel 13 to flush the inner wall of the return channel 13.

Referring to fig. 3, a micro-filter tank 21 is disposed at the tail of the return channel 13, a micro-filter body 211 is erected in the micro-filter tank 21, a connecting pipe 212 is disposed at the water inlet of the micro-filter body 211, one end of the connecting pipe 212, which is far away from the micro-filter, is fixedly disposed on the side wall of the return channel 13 and is communicated with the return channel 13, and a water pump is disposed on the connecting pipe 212. The micro-filter body 211 is provided with an automatic flushing device 5, and the automatic flushing device 5 is provided with a high-pressure water pump.

In use, the water pump pumps water in the return channel 13 into the micro-filter body 211 through the connecting pipe 212, filters the water in the micro-filter body 211, and then flows the filtered sewage into the micro-filter tank 21 from the water outlet of the micro-filter body 211.

Referring to fig. 3, an overhaul bypass channel 22 is provided at the tail of the return channel 13 parallel to the micro-filter tank 21, gates 131 are provided at both ends of the overhaul bypass channel 22, and gates 131 are provided at the end of the micro-filter tank 21 remote from the return channel 13. The overhaul bypass channel 22 is used for temporarily draining sewage into the overhaul bypass channel 22 for temporary storage when overhauling the micro-filter body 211.

Referring to fig. 3, a moving bed biological film purifying tank 23 is arranged at the tail of the micro-filter tank 21, and a porous annular filler accounting for 1/3 of the total volume of the moving bed biological film purifying tank 23 is filled in the moving bed biological film purifying tank 23 for microorganism adhesion growth to decompose organic wastes suspended in a water body into small molecular organic matters, inorganic salts and the like for plant growth absorption. Both ends of the moving bed biological film purifying tank 23 are provided with filter material blocking nets 231.

Referring to fig. 3, a pump tank 24 is provided at the tail of the moving bed biofilm purifying tank 23, and water purified by the moving bed biofilm purifying tank 23 is temporarily stored in the pump tank 24 through a filter material barrier 231.

Referring to fig. 2 and 5, the stereoscopic planting unit 4 includes a plurality of support frames 41, each support frame 41 is correspondingly arranged at the top of each cultivation pond 11, two layers of water planting slots 411 are arranged on the support frames 41 and are respectively used for cultivating vegetables which are loving sun and loving yin, and a communication pipeline is arranged between the two layers of water planting slots 411. Every hydroponic tank 411 is interior all to be provided with thickness 25mm, and trompil diameter 40 mm's porous floating plate, and supplementary sponge is used for fixed plant root system, guarantees plant and upwards grows to can keep the constant of temperature of isolated illumination.

Referring to fig. 2, 3, 5, the stereoscopic planting unit 4 further includes a head reservoir 42 and a tail reservoir 43. The head tank 42 is provided at the head of the support frame 41 and has a height higher than the support frame 41. The head reservoir 42 is provided as a closed box and externally provided with a thermal insulation structure. The side wall of the head water storage tank 42 is provided with a water culture water delivery pipe 421, the end part of the water culture water delivery pipe 421 is connected with the pump pool 24, and the water culture water delivery pipe 421 is provided with a lifting pump 422.

Referring to fig. 5, the side wall of the head tank 42 is provided with a plurality of hydroponic connecting pipes 212, and one end of the hydroponic connecting pipe 212, which is far away from the head tank 42, is connected and communicated with the top hydroponic tank 411. The water culture connection pipes 212 are provided with first water flow regulating valves which can be used for regulating the water flow in each water culture connection pipe 212.

Referring to fig. 2 and 5, the tail water storage tank 43 is disposed at the tail of the support frame 41, and the height of the tail water storage tank is lower than that of the support frame 41, a water culture connection pipe 212 II is disposed on the side wall of the tail water storage tank 43, two end portions of the water culture connection pipe 212 are connected and communicated with the bottom water culture tank 411, a water flow regulating valve II is disposed on the water culture connection pipe 212 II, and the water flow regulating valve II can be used for regulating water flow in each water culture connection pipe 212 II.

Referring to fig. 2, 3 and 5, a circulating water pipe 44 is arranged in the tail water storage tank 43, the end part of the circulating water pipe 44 is connected with the head water storage tank 42, and a water pumping device is arranged on the circulating water pipe 44. The head water storage tank 42 is provided with a water return pipe 45, and the water return pipe 45 is provided with a water drain valve.

Firstly, the lifting pump 422 pumps water in the pump pool 24 into the head water storage tank 42 for temporary storage, and then the planting water enters the water planting tank 411 along the water planting connecting pipe 212 by the gravity of the water, so that nutrient substances are provided for the growth of vegetables. In addition, due to the gravity of the water, the water in the water culture tank 411 flows into the tail water storage tank 43 along the water culture connecting pipe 212 for temporary storage.

Meanwhile, the water in the tail water storage tank 43 is pumped back to the head water storage tank 42 by using the water pumping equipment, so that the water in the water culture tank 411 is in a flowing state, on one hand, the flowing water can take away waste and provide oxygen, and the growth and development of vegetables are facilitated; on the other hand, the fertilizer can also help the root system to absorb nutrients and promote plant growth.

Referring to fig. 3, the rear of the pumping cell 24 is provided with a return channel 46, and the end of the return pipe 45 is connected to and communicates with the return channel 46. After the stereoscopic planting unit 4 treats the sewage to a purified water state, the water drain valve is opened to allow the purified water to flow into the return channel 46 along the return pipe 45. An axial flow pump 461 is arranged between the return channel 46 and the pump pool 24, and when the water in the return channel 46 is detected to be not in accordance with the water quality standard, the water is returned to the pump pool 24 through the axial flow pump 461 for treatment again.

Referring to fig. 3 and 4, a water supply channel 47 is provided at the rear of the return channel 46, and a gate 131 is provided at the junction between the return channel 46 and the water supply channel 47. An ultraviolet sterilizer is provided inside the return channel 46 to perform final sterilization and disinfection of the purified water flowing into the return channel 46, and after the sterilization is completed, the shutter 131 is opened to allow the purified water to flow into the water supply channel 47. The side wall of the water supply channel 47 is provided with a diversion channel 48 corresponding to each culture pond 11, a gate 131 is arranged at the joint of the diversion channel 48 and the water supply channel 47, and a lower water outlet type baffle wall 481 is arranged at the joint of the diversion channel 48 and the culture pond 11, so that purified water flows back into the culture pond 11 along the bottom of the lower water outlet type baffle wall 481, and the cyclic utilization of water resources is realized.

Referring to fig. 3, the present embodiment further includes a self-cleaning unit 6, and the self-cleaning unit 6 includes a cleaning water tank 61, and the cleaning water tank 61 is disposed at a position close to the micro-filter tank 21 and buried under the ground to achieve heat preservation by geothermal heat. The cleaning water tank 61 is provided with a water supply pipe 62, and an end of the water supply pipe 62 is connected to and communicates with the water supply channel 47. The water supply pipe 62 is provided with a water supply pump which conveys a small portion of the purified water in the water supply channel 47 into the clean water tank 61 for storage.

Referring to fig. 2 and 3, the self-cleaning unit 6 includes a heat-insulating housing 64, the heat-insulating housing 64 being rectangular in shape, and the length direction thereof being parallel to the length direction of the return channel 13. The inside flushing pipe one 63 that is provided with of heat preservation shell 64, the length direction of flushing pipe one 63 sets up along the length direction of heat preservation shell 64 to still be provided with the heat preservation for flushing pipe one 63 heat preservation in the heat preservation shell 64, the heat preservation parcel is in flushing pipe one 63 outsides. The first flushing pipe 63 extends to the outside of the insulating housing 64 at an end portion thereof and is connected to and communicates with the cleaning water tank 61. The end of the first flushing pipe 63 is provided with a water pump for supplying water to the first flushing pipe 63, and water in the cleaning water tank 61 is conveyed into the first flushing pipe 63 by the water pump so as to be conveyed into each flushing device 5 later.

Referring to fig. 3 and 6, the flushing device 5 is provided with a plurality of flushing pipes 63 along the length direction thereof, and is slidably connected to the side wall of the return channel 13, and slides along the length direction of the return channel 13 for cleaning the inner wall of the return channel 13. The flushing device 5 comprises a water spray pipe 51, which water spray pipe 51 is arranged horizontally in the return channel 13 and parallel to the width direction of the return channel 13. A plurality of water outlets 52 are formed along the axial direction of the water spraying pipeline 51, a front nozzle 53 and a rear nozzle 54 are arranged at positions of the water spraying pipeline 51 corresponding to the water outlets 52, and the front nozzle 53 and the rear nozzle 54 are obliquely arranged and are opposite in inclination direction. A solenoid valve is arranged at the position corresponding to the water outlet 52, and is used for controlling the flow direction of water flow.

When the high-pressure water impacts the bottom wall of the return channel 13, a recoil force is generated on the water spraying pipeline 51, so that the flushing device 5 moves along the length direction of the return channel 13, and the flushing range of the flushing device 5 is enlarged. The front nozzle 53 and the rear nozzle 54 are inclined in opposite directions, and high-pressure water is discharged from the front nozzle 53 or from the rear nozzle 54 by controlling the solenoid valve. The flushing device 5 moves back and forth along the length direction of the return channel 13, the flushing range of the flushing device 5 is enlarged, and the flushing device 5 can flush the inner wall of the return channel 13 conveniently.

A plurality of high-pressure water pipes are arranged along the axial direction of the flushing pipeline one 63, and one high-pressure water pipe is arranged corresponding to one flushing device 5. The high-pressure water pipe comprises a hard pipe part and a hose part, one end of the hard pipe part is connected and communicated with the first flushing pipeline 63, the end part of the hard pipe part is provided with a high-pressure water pump, the high-pressure water pump is used for pressurizing water and spraying high-pressure water from the flushing device 5, and the high-pressure water pump is fixedly connected with the side wall of the return channel 13. One end of the hose portion is connected to and communicates with the hard pipe portion, and the other end of the hose portion is connected to and communicates with the shower pipe 51, and the hose portion is provided as a flexible hose.

The high-pressure water pump can be arranged on the side wall of the return channel 13, and when the flushing device 5 moves along the length direction of the return channel 13, compared with the conventional high-pressure water pump arranged on the flushing device 5, the technical scheme reduces the resistance when the flushing device 5 moves.

The side wall of the cleaning water tank 61 is provided with a flushing pipeline II, one end of the flushing pipeline II is connected and communicated with the cleaning water tank 61, the other end of the flushing pipeline II is connected with an automatic cleaning device on the micro-filter body 211, and the cleaning water tank 61 supplies water for the automatic cleaning device on the micro-filter body 211 through the flushing pipeline II so as to realize the full utilization of fresh water resources and meet the self-cleaning function of the whole system.

Referring to fig. 7, the culture sewage first flows into the tapered recess 12 in an inclined direction of the culture pond 11, and precipitates and delaminates in the tapered recess 12 so that a part of large particle pollutants remain at the bottom of the tapered recess 12, and the culture sewage is pretreated. After that, the treated sewage is caused to flow into the return channel 13. Wherein, 5% of sewage in the return channel 13 enters the sewage treatment unit 3 for treatment, and 95% of sewage enters the circulating water treatment unit 2 for treatment.

When 95% of sewage enters the circulating water treatment unit 2, the sewage firstly enters the micro-filter tank 21, solid-liquid separation is carried out in the micro-filter, the filtered sewage enters the moving bed biomembrane purifying tank 23, and in the process, when the micro-filter body 211 in the micro-filter tank 21 needs to be overhauled, the sewage can be temporarily stored in the overhauling bypass channel 22. The porous annular filler in the moving bed biological film purifying tank 23 is used for microorganism adhesion growth, and decomposes organic waste suspended in the water body into micromolecular organic matters, inorganic salts and the like for plant growth absorption. Purified water is then fed into pump sump 24 for storage to provide a source of water for subsequent hydroponic vegetables.

The water in the pump sump 24 is then transported by the lift pump 422 into the stereoscopic planting unit 4 for hydroponics. Firstly, the lifting pump 422 pumps water in the pump pool 24 into the head water storage tank 42 for temporary storage, and then the planting water enters the water planting tank 411 along the water planting connecting pipe 212 by the gravity of the water, so that nutrient substances are provided for the growth of vegetables. In addition, due to the gravity of the water, the water in the water culture tank 411 flows into the tail water storage tank 43 along the water culture connecting pipe 212 for temporary storage. Meanwhile, the water in the tail water storage tank 43 is pumped back to the head water storage tank 42 by using the water pumping equipment, so that the water in the water culture tank 411 is in a flowing state, on one hand, the flowing water can take away waste and provide oxygen, and the growth and development of vegetables are facilitated; on the other hand, the fertilizer can also help the root system to absorb nutrients and promote plant growth.

The sewage treated by the circulating water treatment unit 2 contains a proper amount of nutrient substances, is suitable for water culture of vegetables, and can realize utilization of the nutrient substances in the fish culture sewage. In particular, in the case of fish farming in areas where it is inconvenient to transport agricultural products such as vegetables, etc., such as artificial islands, it is necessary to solve not only the problem of ecological environmental destruction caused by random discharge of farming sewage but also the problem of how to supply agricultural products such as vegetables to workers in islands. The technical scheme can solve the problem of vegetable supply on artificial island making by utilizing the cultivation tail water for vegetable cultivation.

After that, by opening the drain valve, the purified water is caused to flow into the return channel 46 along the return pipe 45. If it is detected that the water quality flowing into the return channel 46 is not satisfactory, the sewage is re-conveyed back into the pump sump 24 by the axial flow pump 461. The purified water meeting the detection requirements is temporarily stored in the return canal 46, and the purified water flowing into the return canal 46 is sterilized and disinfected by an ultraviolet sterilization device, so that the water quality is more suitable for fish life, and the sterilized water sequentially enters the culture pond 11 along the water supply canal 47 and the diversion canal 48.

The process realizes the recycling of the culture sewage, and improves the utilization rate of the fresh water; and the zero discharge of the culture sewage is basically realized, the pollution to water quality and soil caused by directly discharging the culture sewage to the ocean or the land is reduced, and the problems of water eutrophication, soil acidification and the like are reduced.

In addition, the self-cleaning unit 6 can clean the return channel 13 and the micro filter body 211 with the purified water in the water supply channel 47, thereby further improving the fresh water utilization rate. First, the clean water in the return channel 13 is fed into the clean water tank 61 along the water feed pipe 62 by the water feed pump. After that, water is supplied into the automatic flushing device 5 through the flushing pipeline, so that the micro-filter body 211 can be flushed and cleaned conveniently. In addition, water is pumped into the first flushing pipeline 63 through the water delivery pump, the water is pressurized through the high-pressure water pump, and the high-pressure water is sprayed out of the flushing device 5, so that the inner wall of the return channel 13 is cleaned. Since the return channel 13 is disposed at a position close to the culture pond 11, the content of impurities such as sludge in the sewage flowing into the return channel 13 is high, and the inner wall of the return channel 13 needs to be cleaned to keep the inner wall of the return channel 13 clean. In addition, the micro-filter body 211 also needs to be cleaned on its own with a self-contained automatic flushing device 5. The device is used for flushing the return channel 13 and the micro-filter body 211, so that on one hand, the sewage can be further fully and reasonably utilized; on the other hand, self-cleaning of the return channel 13 is achieved, and the auxiliary micro-filter body 211 achieves self-cleaning of the micro-filter body 211.

In addition, the flushing device 5 can clean the wall of the return channel 13, and power the movement of the flushing device 5 by virtue of the impulse of high-pressure water, so that the energy consumption is saved. The self-cleaning unit 6 is provided with heat preservation measures, so that the self-cleaning unit 6 can still work continuously under the condition of low temperature in winter and the like.

Referring to fig. 8 and 9, the sewage treatment unit 3 is installed underground, and heat preservation is achieved by geothermal heat. The sewage treatment unit 3 comprises a full-automatic purifying tank 31, a first water inlet pipe 311 is arranged on the side wall of the full-automatic purifying tank 31, and the end part of the first water inlet pipe 311 is connected with the water return channel 13, so that 5% of sewage in the water return channel 13 enters the full-automatic purifying tank 31 for treatment. The full-automatic purifying tank 31 is internally provided with a micro-filter for carrying out preliminary solid-liquid separation on sewage, and the first end 311 of the water inlet pipe is connected with the water inlet of the micro-filter. The bottom of the corresponding full-automatic purifying tank 31 is provided with a sewage collecting tank 32 for storing large-particle organic matters (mainly residual baits, fish feces and the like) in sewage filtered by the micro-filter, a dryer 321 is arranged in the sewage collecting tank 32, a feed inlet of the dryer 321 is provided with a communicating pipeline 322, and the other end of the communicating pipeline 322 penetrates through the bottom of the full-automatic purifying tank 31 and is connected with a solid discharge port of the micro-filter. In addition, an inspection channel 33 is provided corresponding to the side of the dirt collecting tank 32, the inspection channel 33 is vertically provided and extends out of the ground, an inspection cover 331 is provided at the end of the inspection channel 33 extending out of the ground, and an inspection ladder 332 is vertically provided along the inspection channel 33. An access cover plate 331 is provided at the top of the corresponding full-automatic purifying tank 31 to facilitate the maintenance of the micro-filter.

When 5% of sewage in the return channel 13 enters the micro-filter along the first water inlet pipe 311, the micro-filter is subjected to preliminary filtration, and the filtered large-particle organic matters enter the dryer 321 through the communication pipeline 322 to be dried, so that redundant water in the large-particle organic matters is treated, the dried large-particle organic matters are stored in the sewage collecting tank 32 to be subjected to composting treatment, and the generated fertilizer is used for planting vegetables in a subsequent greenhouse, so that nutrients are provided for vegetable growth, and further, the full utilization of nutrient substances in the sewage is realized. During this process, personnel can check the composting situation by opening the access panel 331 and entering the dirt collection tank 32 at any time.

Referring to fig. 8 and 10, a primary purifying tank 34 and a secondary purifying tank 35 are sequentially arranged at the tail part of the full-automatic purifying tank 31 and the sewage collecting tank 32, and are mutually perpendicular. The joint of the full-automatic purifying tank 31 and the primary purifying tank 34 is horizontally inserted with a second water inlet pipe 341 so that the sewage after preliminary filtration enters the primary purifying tank 34 for treatment. A plurality of first aeration pipes 342 are horizontally arranged in the primary purifying tank 34, and the first aeration pipes 342 are arranged in two layers in the primary purifying tank 34. A water passing groove 351 is arranged between the primary purifying tank 34 and the secondary purifying tank 35, and sewage enters the secondary purifying tank 35 from the primary purifying tank 34 through the water passing groove 351. A plurality of aeration pipes II 352 are horizontally arranged in the secondary purifying tank 35, and the aeration pipes II 352 are provided with two layers.

The sewage filtered by the micro-filter enters the primary purifying tank 34 along the second water inlet pipe 341, is treated in the primary purifying tank 34, and flows into the secondary purifying tank 35. Wherein, the first aeration pipe 342 and the second aeration pipe 352 are used for providing oxygen to the sewage to promote the growth and metabolism of biological flora, thereby accelerating the degradation and purification of the sewage; in addition, the aeration pipe can also form certain water flow dynamic in water, so that the suspended state of organic substances and sludge in sewage is maintained, the contact area between microorganisms and the organic substances is increased, and the treatment efficiency is improved. In addition, the first aeration pipe 342 and the second aeration pipe 352 are preferably galvanized pipes, on one hand, the galvanized pipes have good corrosion resistance, and can be used in sewage for a long time without rusting or corroding; on the other hand, galvanized pipe also has lower cost and easy processing technology, and is suitable for use in the A/O technology.

Referring to fig. 8 and 10, a fat water storage tank 36 is arranged at the surrounding position of the side walls of the primary purification tank 34 and the secondary purification tank 35, and a water inlet pipe III 361 is inserted between the tail parts of the fat water storage tank 36 and the secondary purification tank 35 so that the purified fat water enters the fat water storage tank 36 for storage.

Referring to fig. 8 and 10, the rear parts of the primary and secondary purifying tanks 34 and 35 are provided with service passages 33, and each service passage 33 is provided with a service ladder 332 and a service cover 331, so that a worker can grasp the water treatment conditions in the primary and secondary purifying tanks 34 and 35. The corner of the fertilizer water storage tank 36 is provided with an overhaul channel 33, an overhaul ladder 332 is arranged in the overhaul channel 33, and an overhaul cover 331 is arranged at the top, so that the working personnel can grasp the fertilizer water condition at any time.

Referring to fig. 1, most of the fertilizer water in the fertilizer water storage tank 36 is used as irrigation water for the greenhouse, and a small part of the rest of the fertilizer water is used for greening irrigation of flowers, plants and trees after being connected into a greening irrigation system, so that the sewage is further fully and reasonably utilized. Wherein the soilless culture of the greenhouse is a conventional deep-flow culture system, and purified fertilizer water meeting the greening water standard is discharged into a fertilizer water storage tank 36 for irrigation of the greenhouse in winter, so that the supply of vegetables in winter for farmers is realized.

Referring to fig. 11, 5% of sewage in the return channel 13 enters the micro-filter along the first water inlet pipe 311, is subjected to preliminary filtration in the micro-filter, and the filtered large-particle organic matters enter the dryer 321 through the communication pipeline 322 to be dried, so that redundant water in the large-particle organic matters is removed, the dried large-particle organic matters are stored in the sewage collecting tank 32 to be subjected to composting treatment, and the generated fertilizer is used for planting vegetables in a subsequent greenhouse, so as to provide nutrients for the growth of the vegetables, and further realize the full utilization of nutrient substances in the sewage. During this process, personnel can check the composting situation by opening the access panel 331 and entering the dirt collection tank 32 at any time.

The sewage filtered by the micro-filter enters the primary purifying tank 34 along the second water inlet pipe 341, is treated in the primary purifying tank 34, and flows into the secondary purifying tank 35. Wherein, the first aeration pipe 342 and the second aeration pipe 352 are used for providing oxygen to the sewage to promote the growth and metabolism of biological flora, thereby accelerating the degradation and purification of the sewage; in addition, the aeration pipe can also form certain water flow dynamic in water, so that the suspended state of organic substances and sludge in sewage is maintained, the contact area between microorganisms and the organic substances is increased, and the treatment efficiency is improved. The purified fat water enters the fat water storage tank 36 for storage.

The underground fat water reservoir 36 keeps warm by utilizing geothermal heat, and the warm fat water provides a water source for vegetables in the greenhouse and the greening irrigation system, so that sufficient vegetables can be provided for farmers in winter and the greening requirement can be met. And the high-nutrition organic wastes such as large-particle residual baits, faeces and the like stored in the sewage collecting tank 32 are composted to be used as organic fertilizer for irrigation so as to fully utilize the nutrition matters in the sewage.

In conclusion, the culture sewage treatment system realizes the recycling of fresh water and saves fresh water resources on the basis of basically realizing zero discharge of culture sewage; and the nutrient substances in the sewage are utilized for vegetable planting, so that the nutrient substances in the sewage can be fully utilized, the vegetable supply problem of the cultivation personnel can be solved, and the dependence on external logistics is reduced. In addition, in the aspect of treating the vegetable planting problem, the influence of climate factors is fully considered, sewage is subjected to classification treatment, and the underground fertilizer water storage tank 36 is used for preserving and preserving irrigation water in winter so as to provide a water source for winter vegetable irrigation, so that dependence on climate is reduced, and vegetable supply of farmers is still ensured in winter. Thereby realizing full and reasonable utilization of nutrient substances in the fish culture sewage, reducing the waste of resources in the sewage and having excellent sewage treatment effect.

The implementation principle of the self-cleaning fish culture sewage treatment system is as follows:

referring to fig. 1, 7 and 11, the culture sewage firstly flows into the conical groove 12 along the inclined direction of the culture pond 11, and precipitates and delaminates in the conical groove 12, so that part of large-particle pollutants are left at the bottom of the conical groove 12, and the culture sewage is pretreated. After that, the treated sewage is caused to flow into the return channel 13. Wherein, 5% of sewage in the return channel 13 enters the sewage treatment unit 3 for treatment, and 95% of sewage enters the circulating water treatment unit 2 for treatment.

5% of sewage in the return channel 13 enters the micro-filter along the first water inlet pipe 311, is subjected to preliminary filtration in the micro-filter, and the filtered large-particle organic matters enter the dryer 321 through the communication pipeline 322 to be dried, so that redundant water in the large-particle organic matters is treated, the dried large-particle organic matters are stored in the sewage collecting tank 32 to be subjected to composting treatment, and the generated fertilizer is used for planting vegetables in a subsequent greenhouse, so that nutrients are provided for vegetable growth, and further, the full utilization of nutrient substances in the sewage is realized. During this process, personnel can check the composting situation by opening the access panel 331 and entering the dirt collection tank 32 at any time.

In addition, the technical scheme of the application has good heat preservation facilities, so the scheme can be applied to cold water fish value-added stations in Qinghai-Tibet plateau areas, and is used for solving the vegetable supply problem of workers in the stations and the problem of waste of clean water sources in the four-season cultivation tail water recycling and field greening irrigation in the plateau areas.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. Self-cleaning fish culture sewage treatment system, its characterized in that: comprising the following steps:

the runway pool (1) is used for fish living, the bottom of the runway pool (1) is obliquely arranged, and a conical dirt collecting groove (12) is formed in the tail of the runway pool (1);

the water return channel (13) is arranged at the tail part of the runway pool (1), and the water return channel (13) is obliquely arranged along the length direction of the water return channel;

the circulating water treatment unit (2) is arranged at the tail part of the water return channel (13) and is used for purifying the cultivation sewage to be suitable for vegetable growth;

the three-dimensional planting unit (4) comprises a support frame (41), wherein the support frame (41) is erected at the top of the runway pool (1), a water planting groove (411) is formed in the support frame (41), and the water planting groove (411) is used for planting vegetables;

The pump pool (24) is arranged at the tail part of the circulating water treatment unit (2) and used for temporarily storing water purified by the circulating water treatment unit (2), a lifting pump (422) is fixedly arranged on the side wall of the pump pool (24), and the lifting pump (422) is used for conveying water in the pump pool (24) into the three-dimensional planting unit (4);

the backflow channel (46), the backflow channel (46) is set up in the afterbody of the pump sump (24), the said backflow channel (46) has ultraviolet sterilizing units, the sidewall of the backflow channel (46) has return pipes (45), the other end of the return pipe (45) is connected to the stereoscopic planting unit (4);

the sewage treatment unit (3) is arranged at the tail part of the water return channel (13) and buried underground and is used for purifying sewage to be suitable for vegetable growth;

the fertilizer water storage pool (36) is arranged at the tail part of the sewage treatment unit (3) and buried underground, and is used for storing fertilizer water purified by the sewage treatment unit (3) and providing a water source for a greenhouse and a greening irrigation system;

the sewage collecting pool (32) is arranged at the head part of the sewage treatment unit (3) and is used for storing large-particle organic matters filtered out by the sewage treatment unit (3) and providing fertilizers for the greenhouse.

2. The self-cleaning fish farming wastewater treatment system of claim 1, wherein:

the circulating water treatment unit (2) includes:

The micro-filter pool (21) is arranged at the tail part of the water return channel (13), a micro-filter body (211) is arranged in the micro-filter pool, a connecting pipe (212) is arranged at the water inlet of the micro-filter body (211), the other end of the connecting pipe (212) is connected to the side wall of the water return channel (13), and a water suction pump is arranged on the connecting pipe (212);

the moving bed biological film purifying tank (23) is arranged between the micro-filter tank (21) and the pump tank (24).

3. The self-cleaning fish farming wastewater treatment system of claim 1, wherein:

the stereoscopic planting unit (4) further includes:

the head water storage tank (42) is arranged at the head of the supporting frame (41) and is higher than the supporting frame (41), the head water storage tank (42) is provided with a water culture water delivery pipe (421), the end part of the water culture water delivery pipe (421) is connected with the pump pool (24), the lifting pump (422) is arranged on the water culture water delivery pipe (421), the side wall of the head water storage tank (42) is provided with a water culture connecting pipe (212), one end part of the water culture connecting pipe (212) is connected with the water culture tank (411), and the water culture connecting pipe (212) is provided with a water flow regulating valve I;

the tail water storage tank (43) is arranged at the tail of the supporting frame (41) and is lower than the supporting frame (41) in height, the tail water storage tank (43) is provided with a water culture connecting pipe (212) II, a water flow regulating valve II is arranged on the water culture connecting pipe (212) II, the two end parts of the water culture connecting pipe (212) are connected with the water culture tank (411), a circulating water pipe (44) is arranged on the side wall of the tail water storage tank (43), pumping equipment is arranged on the circulating water pipe (44), and the end part of the circulating water pipe (44) is connected with the head water storage tank (42);

The end part of the water return pipe (45) is connected with the side wall of the head water storage tank (42), and a water drain valve is arranged on the water return pipe (45).

4. The self-cleaning fish farming wastewater treatment system of claim 1, wherein:

the sewage treatment unit (3) includes:

the full-automatic purifying tank (31) is provided with a first water inlet pipe (311), the end part of the first water inlet pipe (311) is connected with the water return channel (13), the sewage collecting tank (32) is arranged at the bottom of the full-automatic purifying tank (31), a communication pipeline (322) is arranged at the bottom of the full-automatic purifying tank (31), the communication pipeline (322) extends into the sewage collecting tank (32), a micro-filter is arranged in the full-automatic purifying tank (31), and the communication pipeline (322) is connected with a solid discharge port of the micro-filter;

the dryer (321) is arranged in the sewage collecting tank (32), and the communication pipeline (322) is connected with a feed inlet of the dryer (321);

the first-stage purifying tank (34) is arranged at the tail part of the full-automatic purifying tank (31), the first-stage purifying tank (34) is provided with a second water inlet pipe (341), the end part of the second water inlet pipe (341) is connected with the full-automatic purifying tank (31), and an aeration pipe I (342) is arranged in the first-stage purifying tank (34);

the secondary purifying tank (35), the head is connected and communicated with the tail of the primary purifying tank (34), the tail is connected and communicated with the fat water storage tank (36), and an aeration pipe II (352) is arranged in the secondary purifying tank (35).

5. The self-cleaning fish farming wastewater treatment system of claim 1, wherein:

also comprising a self-cleaning unit (6), the self-cleaning unit (6) comprising:

the cleaning water tank (61), the cleaning water tank (61) is provided with a water supply pipeline (62), the end part of the water supply pipeline (62) is connected and communicated with the water supply channel (47), and the water supply pipeline (62) is provided with a water supply pump;

a first flushing pipeline (63) which is arranged along the length direction of the return channel (13), and a water delivery pump which supplies water for the first flushing pipeline (63) is arranged at the end part of the first flushing pipeline (63);

the flushing device (5) is arranged along the length direction of the flushing pipeline I (63), the end part of the flushing device (5) is connected to the side wall of the return channel (13) in a sliding manner, and slides along the length direction of the return channel (13), and the flushing device (5) is used for cleaning the inner wall of the return channel (13);

the high-pressure water pipe is arranged between the first flushing pipeline (63) and the flushing device (5), and is provided with a high-pressure water pump which is used for pressurizing water and spraying the high-pressure water from the flushing device (5);

and a second flushing pipeline, one end of which is connected and communicated with the cleaning water tank (61) and the other end of which is connected with the automatic flushing device (5) on the micro-filter body (211), wherein the second flushing pipeline is used for conveying water in the cleaning water tank (61) into the automatic flushing device (5).

6. The self-cleaning fish farming wastewater treatment system of claim 5, wherein:

the flushing device (5) comprises:

a water spraying pipeline (51) which is connected and communicated with the high-pressure water pipe, and a water outlet (52) is formed along the axial direction of the water spraying pipeline (51);

a front nozzle (53) which is arranged obliquely relative to the bottom wall of the return channel (13) and is connected to a water outlet (52) on the water spraying pipeline (51);

a rear nozzle (54) which is inclined relative to the bottom wall of the return channel (13) and is connected to a water outlet (52) on the water spraying pipeline (51) in the opposite direction to the inclination direction of the front nozzle (53);

and the electromagnetic valve is arranged at a water outlet (52) on the water spraying pipeline (51) and is used for controlling the flow direction of high-pressure water.

7. The self-cleaning fish farming wastewater treatment system of claim 5, wherein:

the self-cleaning unit (6) further comprises an insulating layer, which is wrapped outside the first flushing pipeline (63) and is used for insulating water inside the first flushing pipeline (63);

the cleaning water tank (61) is buried in the ground.

8. The self-cleaning fish farming wastewater treatment system of claim 5, wherein:

the high-pressure water pipe includes:

the hard pipe part is connected and communicated with the first flushing pipeline (63), and the high-pressure water pump is arranged on the hard pipe part and fixedly connected with the side wall of the water return channel (13);

And one end of the hose part is connected and communicated with the hard pipe part, the other end of the hose part is connected and communicated with the flushing device (5), and the hose part is a telescopic hose.