CN112931391B

CN112931391B - Water treatment system and method based on fish-vegetable symbiotic mode

Info

Publication number: CN112931391B
Application number: CN202110367073.4A
Authority: CN
Inventors: 郑一江; 邵君礼; 王正平; 孟露
Original assignee: Huadian Water Engineering Co ltd; Huadian Water Technology Co ltd
Current assignee: Huadian Water Engineering Co ltd; Huadian Water Technology Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2023-01-06
Anticipated expiration: 2041-04-06
Also published as: CN112931391A

Abstract

The invention discloses a water treatment system based on a fish-vegetable symbiotic mode, which comprises a fish-vegetable symbiotic box and a water treatment box, wherein the fish-vegetable symbiotic box comprises a planting box, a culture box and a push-and-pull top cover; simultaneously, a water treatment method based on a fish-vegetable symbiotic mode is also disclosed. The invention combines the fish and vegetable symbiotic box and the water treatment box, solves the problem of high water change rate caused by the continuous rise of the concentration of pollutants in the traditional circulating water culture system, basically realizes zero water change, can push and pull the top cover to realize the switching of light transmission and light impermeability of the top cover, and ensures the normal growth of animals and plants under different weather conditions.

Description

Water treatment system and method based on fish-vegetable symbiotic mode

Technical Field

The invention relates to a water treatment system and method based on a fish-vegetable symbiotic mode, and belongs to the technical field of water treatment.

Background

In the traditional aquaculture process, along with the accumulation of fish excrement, the ammonia nitrogen content in the water body is gradually increased, toxicity is generated to cultured fishes, and normal growth is influenced or even death is caused. In order to ensure the water quality of aquaculture water, ammonia nitrogen is reduced by replacing aquaculture water, so that not only is precious water resource wasted, but also eutrophication of water areas around aquaculture is caused, and the healthy sustainable development of aquaculture industry is limited. The modern fish and vegetable symbiotic technology combines two agricultural technologies of aquaculture and hydroponic cultivation, the cultivation wastewater is conveyed to a hydroponic cultivation unit through a circulating water process design, ammonia nitrogen is decomposed into nitrite and nitrate by using microorganisms, and the nitrite and the nitrate are absorbed and utilized as nutrient substances of plants, so that the ecological effects of water conservation, emission reduction and resource recycling are realized.

The fish-vegetable symbiotic system has a plurality of key factors including composition ratio, water flow rate, illumination, pH value and the like, wherein the illumination period and the illumination intensity directly influence the growth of plants, so that the growth of fish is indirectly promoted by improving the water quality. In a plurality of fish and vegetable symbiotic systems, the improvement of the illumination intensity and the prolongation of the illumination period can obviously accelerate the growth of fish and vegetables and simultaneously promote the reduction of the content of nitrogen and phosphorus in the water body. Sufficient illumination is an important condition for ensuring normal growth, flowering and fruiting of plants. In areas with sufficient sunlight, the illumination may be primarily dependent on sunlight, and in special weather, such as rainy days, artificial illumination is appropriately supplemented. If the sunshine condition is poor, an artificial light source can be adopted as a supplementary illumination means.

Disclosure of Invention

The invention aims to provide a water treatment system based on a fish-vegetable symbiotic mode and a water treatment method based on the fish-vegetable symbiotic mode.

In order to solve the technical problems, the invention adopts the following technical scheme: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box and a water treatment box, wherein the fish-vegetable symbiotic box comprises a planting box, a breeding box and a push-and-pull top cover; combine together fish-vegetable intergrowth case and water treatment case, solve among the traditional recirculating aquaculture system, because of the high water rate of trading that pollutant concentration constantly risees and lead to, realize "zero water of trading basically, but push-and-pull top cap realizes top cap printing opacity and the switching of lighttight, has guaranteed the normal growth of animals and plants under the different weather conditions.

According to the water treatment system based on the fish-vegetable symbiotic mode, the lower part of the side wall of the planting box is provided with the water inlet and the water outlet of the planting box, a plurality of groups of planting frames are arranged in the planting box, and plants are arranged in the planting frames; the water inlet of the planting box and the water outlet of the planting box realize water circulation.

The water treatment system based on the fish-vegetable symbiotic mode is characterized in that a slope, an aeration pipe, a culture box water outlet, a culture box water inlet and a fish outlet are arranged in a culture box, an included angle a is formed between the slope and the side wall of the culture box, a box body with a trapezoid cross section is formed by the upper surface of the slope and the four side walls of the culture box, fish is arranged in the trapezoid box body, the aeration pipe is arranged on the upper surface of the slope, an air inlet of the aeration pipe is connected with a Roots blower pipeline, the culture box water outlet is arranged at the included angle a between the slope and the side wall of the culture box, the culture box water outlet is connected with a biological treatment pool pipeline through a micro-filter, a biological treatment pool is connected with a planting box water inlet pipeline, a culture box water inlet is arranged on the upper side wall of the culture box, a culture box water inlet is connected with a planting box water outlet pipeline, a fish outlet is arranged at the included angle a between the slope and the side wall of the culture box, and the fish outlet and the culture box water outlet are symmetrically distributed along the center line of the culture box; the culture box is internally provided with a slope, the slope enables fish feces to be concentrated to one side and be periodically discharged from a water outlet of the culture box, the fish is automatically collected after a fish outlet is opened, the internally cultured fish is concentrated to the fish outlet along with water flow and flows out of the fish outlet, manual fishing is not needed, manpower is saved, the micro-filter can filter out solid matters such as most of fish feces, and the effluent enters the biological treatment tank after being filtered by the micro-filter; the biological treatment pool further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is reduced and then returns to the planting frame from the water inlet of the planting box, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved.

In the aforementioned water treatment system based on the fish-vegetable symbiotic mode, the included angle a is 75-85 °.

In the aforementioned water treatment system based on the fish-vegetable symbiotic mode, the plants comprise water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable, melon and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas.

According to the water treatment system based on the fish-vegetable symbiotic mode, the fishes comprise crucians, grass carps, channel catfishes, megalobrama amblycephala, loaches, culter ilishaeformis or pelteobagrus fulvidraco.

The water treatment system based on the fish-vegetable symbiotic mode comprises an upper top and a lower top, wherein the upper top comprises an upper top frame, a plurality of groups of upper top channel steel plates and a plurality of groups of upper top plate gaps, the upper top channel steel plates and the upper top plate gaps are arranged in an inner frame of the upper top frame at intervals, the lower top comprises a lower top frame, a plurality of groups of lower top steel plates, a plurality of groups of lower top gaps and hooks, the lower top steel plates and the lower top gaps are arranged in the inner frame of the lower top frame at intervals, the hooks are arranged on the short side of the lower top frame, the upper top frame is connected with the lower top frame in a sliding mode, the lower surface of the upper top frame is connected with the upper surface of the top of the fish-vegetable symbiotic box, and the widths of the upper top channel steel plates, the upper top plate gaps, the lower top steel plates and the lower top gaps are the same; the top cover can be pushed and pulled to realize the switching of light transmission and light impermeability of the top cover, so that the normal growth of animals and plants under different weather conditions is ensured, and when the top cover is in severe weather, the initial state is kept, each group of upper top channel steel and each group of lower top gaps are mutually corresponding, each group of upper top plate gaps and each group of lower top steel are mutually corresponding, and the upper top and the lower top form a non-light transmission state; when the solar energy storage type solar energy collector is in good weather, each group of upper top channel steel corresponds to each group of lower top channel steel, and each group of upper top plate gaps corresponds to each group of lower top gaps to form a light-transmitting state.

The water treatment system based on the fish-vegetable symbiotic mode comprises an upper top frame, a lower top frame and a plurality of water treatment tanks, wherein the upper top frame comprises a left side beam, an upper side beam, a right side beam and a lower side beam which are sequentially connected end to end, the height of the left side beam is h1, the heights of the right side beam, the upper side beam and the lower side beam are h2, h1 is less than h2, the inner sides of the upper side beam and the lower side beam are respectively provided with a slide way, the slide ways are arranged on the lower surfaces close to the upper side beam and the lower side beam, the heights of the slide ways are the same as the height of the lower top frame, one long side of the lower top frame is connected with the slide ways in a sliding manner, the lower surface of the upper side beam is connected with the upper surface of the top of a fish-vegetable symbiotic tank, the lower surface of the right side beam is connected with the upper surface of the top of the fish-vegetable symbiotic tank, and the lower surface of the lower side beam is connected with the upper surface of the top of the fish-vegetable symbiotic tank; the slideway enables the lower top frame to slide along the slideway, so that the light transmission and light-tight switching of the top cover is realized; the right roof beam height is greater than the height of left roof beam, prevents that the lower top frame from sliding to the right roof beam along the slide and continuing to slide, leads to the maloperation.

According to the water treatment system based on the fish-vegetable symbiotic mode, gates are arranged on the side walls of the fish-vegetable symbiotic box and the water treatment box.

A water treatment method based on a fish-vegetable symbiotic mode comprises the following steps:

s1, planting plants in a planting frame, placing fishes in a culture box with a slope, enabling water required for planting to flow into the planting box through a water inlet of the planting box to provide water for the plants in the planting frame, enabling excess water to flow out of a water outlet of the planting box and be conveyed to a water inlet of the culture box through a pipeline, and enabling the excess water to enter the culture box from the water inlet of the culture box;

s2, starting the Roots blower, and conveying gas to the aeration pipe through the pipeline to provide sufficient oxygen for the fishes in the culture box;

s3, enabling water in the culture box to flow out of a water outlet of the culture box, starting a micro-filter to filter the water in the culture box to obtain filtered effluent, and conveying the filtered effluent to a biological treatment tank through a pipeline for nitrification treatment to obtain nitrified effluent;

s4, enabling the nitrified effluent to flow into the planting box from a water inlet of the planting box through a pipeline;

s5, when the automobile is in severe weather, maintaining an initial state, enabling each group of upper jacking channel steel and each group of lower jacking gaps to correspond to each other, enabling each group of upper top plate gaps and each group of lower top steel plates to correspond to each other, and enabling the upper jacking and the lower jacking to form a non-light-transmitting state;

s6, when the weather is good, pulling the hook, enabling the lower top to slide along the slide way, enabling the lower top frame to be far away from the right side beam, enabling each group of upper top channel steel and each group of lower top steel plates to correspond to each other, enabling each group of upper top plate gaps and each group of lower top gaps to correspond to each other, and forming a light-transmitting state;

and S7, when the good weather turns into severe weather, pushing the upper top, sliding the lower top along the slide way, enabling the lower top frame to be close to the right side beam, enabling each group of upper top channel steel to correspond to each group of lower top gaps, enabling each group of upper top plate gaps to correspond to each group of lower top steel plates, and enabling the upper top and the lower top to form a non-light-transmitting state.

Compared with the prior art, the fish-vegetable symbiotic box comprises a planting box, a culture box and a push-and-pull top cover, wherein the water treatment box comprises a Roots blower, a micro-filter and a biological treatment tank, the culture box is connected with the Roots blower through a pipeline, the culture box is connected with the biological treatment tank through the micro-filter through a pipeline, and the push-and-pull top cover is arranged at the top of the fish-vegetable symbiotic box; the biological treatment pool further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the nitrite and the nitrate are returned to the planting frame from a water inlet of the planting box after the ammonia nitrogen is reduced, the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, the problem of high water changing rate caused by continuous rising of pollutant concentration in a traditional recirculating aquaculture system is solved, and zero water changing is basically realized; meanwhile, box-type modular production is adopted, so that the defects of complex design, transportation, installation and operation of the traditional fish-vegetable symbiotic system are overcome; the construction cost and the construction difficulty are saved; manual maintenance in daily use is reduced; in addition, a box-type structure is improved, the box-type lighting capacity is greatly improved, and the fish and plants in the system can grow better; meanwhile, the designed fish outlet reduces the fishing cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a fish-vegetable symbiotic box according to the present invention;

FIG. 3 is a schematic view showing the structure of a water treatment tank according to the present invention;

FIG. 4 is a schematic view of the construction of the roof of the present invention;

FIG. 5 is a schematic view of the structure of the lower ceiling of the present invention;

FIG. 6 is a schematic view of the construction of the push-pull top cover of the present invention when exposed to inclement weather;

FIG. 7 is a schematic view of the construction of the push-pull top cover of the present invention when in good weather;

FIG. 8 is a schematic view of the pipe connection between the aquaponics tank and the water treatment tank in the present invention.

Reference numerals are as follows: 1-aquaponics box, 2-water treatment box, 3-planting box, 4-cultivation box, 5-push-pull top cover, 6-roots blower, 7-micro filter, 8-biological treatment tank, 9-planting box inlet, 10-planting box outlet, 11-planting rack, 12-plant, 13-slope, 14-aeration pipe, 15-cultivation box outlet, 16-cultivation box inlet, 17-fish outlet, 18-fish, 19-top, 20-bottom, 21-top frame, 22-top channel steel, 23-top plate gap, 24-bottom top frame, 25-bottom steel plate, 26-bottom gap, 27-hook, 28-left side beam, 29-top side beam, 30-right side beam, 31-bottom side beam, 32-slideway, 33-door.

The invention is further described with reference to the following figures and detailed description.

Detailed Description

Example 1 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment tank 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment tank 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; combine together fish-vegetable intergrowth case 1 and water treatment case 2, solve traditional recirculating aquaculture system, because of the high water rate of changing that pollutant concentration constantly risees and leads to, realize "zero water changing" basically, but push-and-pull top cap 5 realizes the switching that the top cap passes through light and lightproof, has guaranteed the normal growth of animals and plants under the different weather conditions.

Example 2 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish-vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water aquaculture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light tightness of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the planting box water inlet 9 and the planting box water outlet 10 realize water circulation.

Example 3 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; the slope 13 is arranged in the culture box 4, the slope 13 enables the fish feces to be concentrated to one side and to be discharged from a water outlet 15 of the culture box regularly, the fish outlet 17 is opened to automatically collect the fish, the internally cultured fish is concentrated to the fish outlet 17 along with the water flow and flows out along with the slope 13, manual fishing is not needed, labor is saved, the micro-filter 7 can filter out solid matters such as most of fish feces, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved.

Example 4 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; the slope 13 is arranged in the culture box 4, the slope 13 enables the fish feces to be concentrated to one side and to be discharged from a water outlet 15 of the culture box regularly, the fish outlet 17 is opened to automatically collect the fish, the internally cultured fish is concentrated to the fish outlet 17 along with the water flow and flows out along with the slope 13, manual fishing is not needed, labor is saved, the micro-filter 7 can filter out solid matters such as most of fish feces, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved; the included angle a is 75-85 degrees.

Example 5 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish-vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water aquaculture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light tightness of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; a slope 13 is arranged in the culture box 4, the slope 13 enables fish feces to be concentrated to one side and be periodically discharged from a water outlet 15 of the culture box, the fish is automatically collected after a fish outlet 17 is opened, the internally cultured fishes are concentrated to the fish outlet 17 along with water flow and flow out from the slope 13, manual fishing is not needed, labor is saved, solid substances such as feces of most fishes can be filtered by the micro-filter 7, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved; the included angle a is 75-85 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable, melon and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas.

Example 6 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish-vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water aquaculture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light tightness of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; a slope 13 is arranged in the culture box 4, the slope 13 enables fish feces to be concentrated to one side and be periodically discharged from a water outlet 15 of the culture box, the fish is automatically collected after a fish outlet 17 is opened, the internally cultured fishes are concentrated to the fish outlet 17 along with water flow and flow out from the slope 13, manual fishing is not needed, labor is saved, solid substances such as feces of most fishes can be filtered by the micro-filter 7, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved; the included angle a is 75-85 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas; the fish 18 comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, erythroculter ilishaeformis or pelteobagrus fulvidraco.

Example 7 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; the slope 13 is arranged in the culture box 4, the slope 13 enables the fish feces to be concentrated to one side and to be discharged from a water outlet 15 of the culture box regularly, the fish outlet 17 is opened to automatically collect the fish, the internally cultured fish is concentrated to the fish outlet 17 along with the water flow and flows out along with the slope 13, manual fishing is not needed, labor is saved, the micro-filter 7 can filter out solid matters such as most of fish feces, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved; the included angle a is 75-85 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas; the fish 18 comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, erythroculter ilishaeformis or pelteobagrus fulvidraco; the push-and-pull top cover 5 comprises an upper top 19 and a lower top 20, the upper top 19 comprises an upper top frame 21, a plurality of groups of upper top channel steel 22 and a plurality of groups of upper top plate gaps 23, the upper top channel steel 22 and the upper top plate gaps 23 are arranged in an inner frame of the upper top frame 21 at intervals, the lower top 20 comprises a lower top frame 24, a plurality of groups of lower top steel plates 25, a plurality of groups of lower top gaps 26 and hooks 27, the lower top steel plates 25 and the lower top gaps 26 are arranged in an inner frame of the lower top frame 24 at intervals, the hooks 27 are arranged on one short side of the lower top frame 24, the upper top frame 21 is connected with the lower top frame 24 in a sliding manner, the lower surface of the upper top frame 21 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, and the widths of the upper top channel steel 22, the upper top plate gaps 23, the lower top steel plates 25 and the lower top gaps 26 are the same; the top cover 5 can be pushed and pulled to realize the switching of light transmission and light tightness of the top cover, so that the normal growth of animals and plants under different weather conditions is ensured, and when the animals and plants are in severe weather, the initial state is kept, each group of upper top channel steel 22 and each group of lower top gap 26 are mutually corresponding, each group of upper top plate gap 23 and each group of lower top steel plate 25 are mutually corresponding, and the upper top 19 and the lower top 20 are in a non-light transmission state; when the weather is good, each group of upper top channel steel 22 and each group of lower top steel plate 25 correspond to each other, and each group of upper top plate gap 23 and each group of lower top gap 26 correspond to each other to form a light-transmitting state.

Example 8 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; a slope 13 is arranged in the culture box 4, the slope 13 enables fish feces to be concentrated to one side and be periodically discharged from a water outlet 15 of the culture box, the fish is automatically collected after a fish outlet 17 is opened, the internally cultured fishes are concentrated to the fish outlet 17 along with water flow and flow out from the slope 13, manual fishing is not needed, labor is saved, solid substances such as feces of most fishes can be filtered by the micro-filter 7, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, decomposes ammonia nitrogen in the water into nitrite and nitrate by using microorganisms, returns to the planting frame 11 from the water inlet 9 of the planting box after the ammonia nitrogen is reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, thereby completing circulation and achieving the purpose of 'zero water change'; the included angle a is 75-85 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas; the fish 18 comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, erythroculter ilishaeformis or pelteobagrus fulvidraco; the push-and-pull top cover 5 comprises an upper top 19 and a lower top 20, the upper top 19 comprises an upper top frame 21, a plurality of groups of upper top channel steel 22 and a plurality of groups of upper top plate gaps 23, the upper top channel steel 22 and the upper top plate gaps 23 are arranged in an inner frame of the upper top frame 21 at intervals, the lower top 20 comprises a lower top frame 24, a plurality of groups of lower top steel plates 25, a plurality of groups of lower top gaps 26 and hooks 27, the lower top steel plates 25 and the lower top gaps 26 are arranged in an inner frame of the lower top frame 24 at intervals, the hooks 27 are arranged on one short side of the lower top frame 24, the upper top frame 21 is connected with the lower top frame 24 in a sliding manner, the lower surface of the upper top frame 21 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, and the widths of the upper top channel steel 22, the upper top plate gaps 23, the lower top steel plates 25 and the lower top gaps 26 are the same; the top cover 5 can be pushed and pulled to realize the switching of light transmission and light impermeability of the top cover, so that the normal growth of animals and plants under different weather conditions is ensured, and when the animals and plants are in severe weather, the initial state is kept, each group of upper top channel steel 22 corresponds to each group of lower top gaps 26, each group of upper top plate gaps 23 corresponds to each group of lower top steel plates 25, and the upper top 19 and the lower top 20 form a non-light transmission state; when in good weather, each group of upper top channel steel 22 and each group of lower top steel plate 25 are mutually corresponding, and each group of upper top plate gap 23 and each group of lower top gap 26 are mutually corresponding to form a light-transmitting state; the upper top frame 21 comprises a left side beam 28, an upper side beam 29, a right side beam 30 and a lower side beam 31 which are sequentially connected end to end, the height of the left side beam 28 is h1, the heights of the right side beam 30, the upper side beam 29 and the lower side beam 31 are h2, h1 is less than h2, slide ways 32 are arranged on the inner sides of the upper side beam 29 and the lower side beam 31, the slide ways 32 are arranged on the lower surfaces close to the upper side beam 29 and the lower side beam 31, the height of each slide way 32 is the same as that of the lower top frame 24, the long side of the lower top frame 24 is connected with the slide ways 32 in a sliding mode, the lower surface of the upper side beam 29 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, the lower surface of the right side beam 30 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, and the lower surface of the lower side beam 31 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1; the slideway 32 enables the lower top frame 24 to slide along the slideway 32, so as to realize the switching between light transmission and light non-transmission of the top cover; the height of the right side rail 30 is greater than the height of the left side rail 28 to prevent the lower top frame 24 from sliding further along the slide rails 32 to the right side rail 30, resulting in malfunction.

Example 9 of the invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; a slope 13 is arranged in the culture box 4, the slope 13 enables fish feces to be concentrated to one side and be periodically discharged from a water outlet 15 of the culture box, the fish is automatically collected after a fish outlet 17 is opened, the internally cultured fishes are concentrated to the fish outlet 17 along with water flow and flow out from the slope 13, manual fishing is not needed, labor is saved, solid substances such as feces of most fishes can be filtered by the micro-filter 7, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, ammonia nitrogen in the water is decomposed into nitrite and nitrate by microorganisms, the ammonia nitrogen is returned to the planting frame 11 from the water inlet 9 of the planting box after being reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, so that circulation is completed, and the purpose of zero water change is achieved; the included angle a is 75-85 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas; the fish 18 comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, erythroculter ilishaeformis or pelteobagrus fulvidraco; the push-and-pull top cover 5 comprises an upper top 19 and a lower top 20, the upper top 19 comprises an upper top frame 21, a plurality of groups of upper top channel steel 22 and a plurality of groups of upper top plate gaps 23, the upper top channel steel 22 and the upper top plate gaps 23 are arranged in the inner frame of the upper top frame 21 at intervals, the lower top 20 comprises a lower top frame 24, a plurality of groups of lower top steel plates 25, a plurality of groups of lower top gaps 26 and hooks 27, the lower top steel plates 25 and the lower top gaps 26 are arranged in the inner frame of the lower top frame 24 at intervals, the hooks 27 are arranged on the short side of the lower top frame 24, the upper top frame 21 is in sliding connection with the lower top frame 24, the lower surface of the upper top frame 21 is connected with the upper surface of the top of the symbiotic fish-vegetable box 1, and the widths of the upper top channel steel 22, the upper top plate gaps 23, the lower top steel plates 25 and the lower top gaps 26 are the same; the top cover 5 can be pushed and pulled to realize the switching of light transmission and light impermeability of the top cover, so that the normal growth of animals and plants under different weather conditions is ensured, and when the animals and plants are in severe weather, the initial state is kept, each group of upper top channel steel 22 corresponds to each group of lower top gaps 26, each group of upper top plate gaps 23 corresponds to each group of lower top steel plates 25, and the upper top 19 and the lower top 20 form a non-light transmission state; when the weather is good, each group of upper top channel steel 22 and each group of lower top steel plate 25 correspond to each other, and each group of upper top plate gap 23 and each group of lower top gap 26 correspond to each other to form a light-transmitting state; the upper top frame 21 comprises a left side beam 28, an upper side beam 29, a right side beam 30 and a lower side beam 31 which are sequentially connected end to end, the height of the left side beam 28 is h1, the heights of the right side beam 30, the upper side beam 29 and the lower side beam 31 are h2, h1 is less than h2, slide ways 32 are arranged on the inner sides of the upper side beam 29 and the lower side beam 31, the slide ways 32 are arranged on the lower surfaces close to the upper side beam 29 and the lower side beam 31, the height of each slide way 32 is the same as that of the lower top frame 24, the long side of the lower top frame 24 is connected with the slide ways 32 in a sliding mode, the lower surface of the upper side beam 29 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, the lower surface of the right side beam 30 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, and the lower surface of the lower side beam 31 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1; the slideway 32 enables the lower top frame 24 to slide along the slideway 32, so as to realize the switching between light transmission and light non-transmission of the top cover; the height of the right side beam 30 is greater than that of the left side beam 28, so that the lower top frame 24 is prevented from sliding to the right side beam 30 along the slide ways 32 and then sliding continuously, and misoperation is caused; and gates 33 are arranged on the side walls of the fish-vegetable symbiotic box 1 and the water treatment box 2.

s1, planting plants 12 in a planting frame 11, placing fishes 18 in a culture box 4 provided with a slope 13, enabling water required for planting to flow into a planting box 3 through a planting box water inlet 9 to provide water for the plants 12 in the planting frame 11, enabling excess water to flow out of a planting box water outlet 10 and be conveyed to a culture box water inlet 16 through a pipeline, and enabling the excess water to enter the culture box 4 from the culture box water inlet 16;

s2, starting the Roots blower 6, and conveying gas to the aeration pipe 14 through a pipeline to provide sufficient oxygen for the fishes 18 in the culture box 4;

s3, water in the culture box 4 flows out of a water outlet 15 of the culture box, the micro-filter 7 is started at the same time, the water in the culture box 4 is filtered to obtain filtered effluent, and the filtered effluent is conveyed to the biological treatment tank 8 through a pipeline to be subjected to nitrification treatment to obtain nitrified effluent;

s4, enabling the nitrified effluent to flow into the planting box 3 from a water inlet 9 of the planting box through a pipeline;

s5, when the automobile is in severe weather, maintaining an initial state, enabling each group of upper top channel steel 22 and each group of lower top gaps 26 to correspond to each other, enabling each group of upper top plate gaps 23 and each group of lower top steel plates 25 to correspond to each other, and enabling the upper top 19 and the lower top 20 to form a non-light-transmitting state;

s6, when the weather is good, the hook 27 is pulled, the lower top 20 slides along the slide way 32, the lower top frame 24 is far away from the right side beam 30, each group of upper top channel steel 22 corresponds to each group of lower top steel plate 25, each group of upper top plate gap 23 corresponds to each group of lower top gap 26, and a light-transmitting state is formed;

and S7, when the good weather turns into the bad weather, the upper top 19 is pushed, the lower top 20 slides along the slide way 32, the lower top frame 24 is made to be close to the right side beam 30, each group of upper top channel steel 22 corresponds to each group of lower top gap 26, each group of upper top plate gap 23 corresponds to each group of lower top steel plate 25, and the upper top 19 and the lower top 20 are in a non-light-transmitting state.

Example 10 of the present invention: a water treatment system based on a fish-vegetable symbiotic mode comprises a fish-vegetable symbiotic box 1 and a water treatment box 2, wherein the fish-vegetable symbiotic box 1 comprises a planting box 3, a culture box 4 and a push-pull top cover 5, the water treatment box 2 comprises a Roots blower 6, a micro-filter 7 and a biological treatment pool 8, the culture box 4 is connected with the Roots blower 6 through a pipeline, the culture box 4 is connected with the biological treatment pool 8 through the micro-filter 7 through a pipeline, and the push-pull top cover 5 is arranged at the top of the fish-vegetable symbiotic box 1; the fish and vegetable symbiotic box 1 and the water treatment box 2 are combined, so that the problem that in a traditional circulating water culture system, the water changing rate is high due to the fact that the concentration of pollutants is continuously increased is solved, zero water changing is basically achieved, the top cover 5 can be pushed and pulled to achieve switching between light transmission and light non-transmission of the top cover, and normal growth of animals and plants under different weather conditions is guaranteed; a planting box water inlet 9 and a planting box water outlet 10 are arranged at the lower part of the side wall of the planting box 3, a plurality of groups of planting frames 11 are arranged in the planting box 3, and plants 12 are arranged in the planting frames 11; the water inlet 9 and the water outlet 10 of the planting box realize water circulation; a slope 13, an aeration pipe 14, a culture box water outlet 15, a culture box water inlet 16 and a fish outlet 17 are arranged in the culture box 4, an included angle a is formed between the slope 13 and the side wall of the culture box 4, a box body with a trapezoid cross section is formed by the upper surface of the slope 13 and the four side walls of the culture box 4, fish 18 are arranged in the trapezoid box body, the aeration pipe 14 is arranged on the upper surface of the slope 13, an air inlet of the aeration pipe 14 is in pipeline connection with a Roots blower 6, the culture box water outlet 15 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, the culture box water outlet 15 is in pipeline connection with a biological treatment pond 8 through a micro-filter 7, the biological treatment pond 8 is in pipeline connection with a planting box water inlet 9, the culture box water inlet 16 is arranged on the upper side wall of the culture box 4, the culture box water inlet 16 is in pipeline connection with a planting box water outlet 10, the fish outlet 17 is arranged at the included angle a between the slope 13 and the side wall of the culture box 4, and the fish outlet 17 is symmetrically distributed along the center line of the culture box 4; a slope 13 is arranged in the culture box 4, the slope 13 enables fish feces to be concentrated to one side and be periodically discharged from a water outlet 15 of the culture box, the fish is automatically collected after a fish outlet 17 is opened, the internally cultured fishes are concentrated to the fish outlet 17 along with water flow and flow out from the slope 13, manual fishing is not needed, labor is saved, solid substances such as feces of most fishes can be filtered by the micro-filter 7, and the effluent enters the biological treatment tank 8 after being filtered by the micro-filter 7; the biological treatment pool 8 further nitrifies the water, decomposes ammonia nitrogen in the water into nitrite and nitrate by using microorganisms, returns to the planting frame 11 from the water inlet 9 of the planting box after the ammonia nitrogen is reduced, and the nitrate nitrogen in the water can be absorbed and utilized as nutrient substances of plants, thereby completing circulation and achieving the purpose of 'zero water change'; the included angle a is 75-85 degrees, and the preferred included angle a is 80 degrees; the plant 12 comprises water spinach, towel gourd, balsam pear, watercress or lettuce; swamp cabbage, towel gourd, balsam pear, watercress or lettuce are vegetable and fruit plants with developed root systems and strong processing capability, and water quality purification treatment is carried out by utilizing developed root systems and large absorption surface areas; the fish 18 comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, culter ilishaeformis or pelteobagrus fulvidraco; the push-and-pull top cover 5 comprises an upper top 19 and a lower top 20, the upper top 19 comprises an upper top frame 21, a plurality of groups of upper top channel steel 22 and a plurality of groups of upper top plate gaps 23, the upper top channel steel 22 and the upper top plate gaps 23 are arranged in the inner frame of the upper top frame 21 at intervals, the lower top 20 comprises a lower top frame 24, a plurality of groups of lower top steel plates 25, a plurality of groups of lower top gaps 26 and hooks 27, the lower top steel plates 25 and the lower top gaps 26 are arranged in the inner frame of the lower top frame 24 at intervals, the hooks 27 are arranged on the short side of the lower top frame 24, the upper top frame 21 is in sliding connection with the lower top frame 24, the lower surface of the upper top frame 21 is connected with the upper surface of the top of the symbiotic fish-vegetable box 1, and the widths of the upper top channel steel 22, the upper top plate gaps 23, the lower top steel plates 25 and the lower top gaps 26 are the same; the top cover 5 can be pushed and pulled to realize the switching of light transmission and light impermeability of the top cover, so that the normal growth of animals and plants under different weather conditions is ensured, and when the animals and plants are in severe weather, the initial state is kept, each group of upper top channel steel 22 corresponds to each group of lower top gaps 26, each group of upper top plate gaps 23 corresponds to each group of lower top steel plates 25, and the upper top 19 and the lower top 20 form a non-light transmission state; when in good weather, each group of upper top channel steel 22 and each group of lower top steel plate 25 are mutually corresponding, and each group of upper top plate gap 23 and each group of lower top gap 26 are mutually corresponding to form a light-transmitting state; the upper top frame 21 comprises a left side beam 28, an upper side beam 29, a right side beam 30 and a lower side beam 31 which are sequentially connected end to end, the height of the left side beam 28 is h1, the heights of the right side beam 30, the upper side beam 29 and the lower side beam 31 are h2, h1 is less than h2, slide ways 32 are arranged on the inner sides of the upper side beam 29 and the lower side beam 31, the slide ways 32 are arranged on the lower surfaces close to the upper side beam 29 and the lower side beam 31, the height of each slide way 32 is the same as that of the lower top frame 24, the long side of the lower top frame 24 is connected with the slide ways 32 in a sliding mode, the lower surface of the upper side beam 29 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, the lower surface of the right side beam 30 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1, and the lower surface of the lower side beam 31 is connected with the upper surface of the top of the fish-vegetable symbiotic box 1; the slideway 32 enables the lower top frame 24 to slide along the slideway 32, so as to realize the switching between light transmission and light non-transmission of the top cover; the height of the right side beam 30 is greater than that of the left side beam 28, so that the lower top frame 24 is prevented from sliding to the right side beam 30 along the slide ways 32 and then sliding continuously, and misoperation is caused; and gates 33 are arranged on the side walls of the fish and vegetable symbiotic box 1 and the water treatment box 2.

s3, water in the cultivation box 4 flows out of a water outlet 15 of the cultivation box, meanwhile, a micro-filter 7 is started to filter the water in the cultivation box 4 to obtain filtered outlet water, and the filtered outlet water is conveyed to a biological treatment tank 8 through a pipeline to be subjected to nitrification treatment to obtain nitrified outlet water;

The working principle of one embodiment of the invention is as follows: when the water supply system works, plants 12 are planted in the planting frame 11, fishes 18 are placed in the culture box 4 provided with the slope 13, water required for planting flows into the planting box 3 through the planting box water inlet 9 to provide water for the plants 12 in the planting frame 11, excess water flows out through the planting box water outlet 10 and is conveyed to the culture box water inlet 16 through a pipeline, and the excess water enters the culture box 4 from the culture box water inlet 16; starting the Roots blower 6, and delivering gas to the aeration pipe 14 through a pipeline to provide sufficient oxygen for the fishes 18 in the culture box 4; the water in the culture box 4 flows out from the water outlet 15 of the culture box, and meanwhile, the micro-filter 7 is started to filter the water in the culture box 4 to obtain filtered outlet water, and the filtered outlet water is conveyed to the biological treatment tank 8 through a pipeline to be subjected to nitrification treatment to obtain nitrified outlet water; the effluent after nitrification flows into the planting box 3 from a water inlet 9 of the planting box through a pipeline; when the automobile is in severe weather, the initial state is kept, each group of upper top channel steel 22 and each group of lower top gaps 26 are mutually corresponding, each group of upper top plate gaps 23 and each group of lower top steel plates 25 are mutually corresponding, and the upper top 19 and the lower top 20 form a non-light-transmitting state; when in good weather, the hook 27 is pulled, the lower top 20 slides along the slide way 32, the lower top frame 24 is far away from the right side beam 30, each group of upper top channel steel 22 corresponds to each group of lower top steel plate 25, each group of upper top plate gap 23 corresponds to each group of lower top gap 26, and a light-transmitting state is formed; when the weather turns to bad weather, the upper top 19 is pushed, the lower top 20 slides along the slide way 32, the lower top frame 24 is close to the right side beam 30, each group of upper top channel steel 22 corresponds to each group of lower top gap 26, each group of upper top plate gap 23 corresponds to each group of lower top steel plate 25, and the upper top 19 and the lower top 20 are in a non-light-transmitting state.

Claims

1. A water treatment system based on a fish-vegetable symbiotic mode is characterized by comprising a fish-vegetable symbiotic box (1) and a water treatment box (2), wherein the fish-vegetable symbiotic box (1) comprises a planting box (3), a culture box (4) and a push-pull top cover (5), the water treatment box (2) comprises a Roots blower (6), a micro-filter (7) and a biological treatment pool (8), the culture box (4) is in pipeline connection with the Roots blower (6), the culture box (4) is in pipeline connection with the biological treatment pool (8) through the micro-filter (7), and the push-pull top cover (5) is arranged at the top of the fish-vegetable symbiotic box (1); the push-and-pull top cover (5) comprises an upper top (19) and a lower top (20), the upper top (19) comprises an upper top frame (21), multiple groups of upper top channel steel (22) and multiple groups of upper top plate gaps (23), the upper top channel steel (22) and the upper top plate gaps (23) are arranged in the inner frame of the upper top frame (21) at intervals, the lower top (20) comprises a lower top frame (24), multiple groups of lower top steel plates (25), multiple groups of lower top gaps (26) and hooks (27), the lower top steel plates (25) and the lower top gaps (26) are arranged in the inner frame of the lower top frame (24) at intervals, the hooks (27) are arranged on one side of the lower top frame (24) which is short, the upper top frame (21) is connected with the lower top frame (24) in a sliding mode, the lower surface of the upper top frame (21) is connected with the upper surface of the top of the fish-vegetable symbiosis box (1), and the widths of the upper top channel steel (22), the upper top plate gaps (23), the lower top steel plates (25) and the lower top gaps (26) are the same; the upper top frame (21) comprises a left side beam (28), an upper side beam (29), a right side beam (30) and a lower side beam (31) which are sequentially connected end to end, the height of the left side beam (28) is h1, the heights of the right side beam (30), the upper side beam (29) and the lower side beam (31) are h2, h1 is less than h2, slide ways (32) are arranged on the inner sides of the upper side beam (29) and the lower side beam (31), the slide ways (32) are arranged on the lower surfaces close to the upper side beam (29) and the lower side beam (31), the height of the slide ways (32) is the same as that of the lower top frame (24), and the long side of the lower top frame (24) is connected with the slide ways (32) in a sliding manner, the lower surface of the upper side beam (29) is connected with the upper surface of the top of the fish-vegetable symbiotic box (1), the lower surface of the right side beam (30) is connected with the upper surface of the top of the fish-vegetable symbiotic box (1), the lower surface of the lower side beam (31) is connected with the upper surface of the top of the fish-vegetable symbiotic box (1), a slope (13), an aeration pipe (14), a water outlet (15) of the breeding box, a water inlet (16) of the breeding box and a fish outlet (17) are arranged in the breeding box (4), an included angle a is formed between the slope (13) and the side wall of the breeding box (4), and the upper surface of the slope (13) and the four side walls of the breeding box (4) form a box body with an irregular quadrilateral section, the fish breeding device is characterized in that fish (18) are arranged in the box body in the trapezoid shape, the aeration pipe (14) is arranged on the upper surface of the slope (13), an air inlet of the aeration pipe (14) is connected with a Roots blower (6) through a pipeline, a water outlet (15) of the breeding box is arranged at an included angle a between the slope (13) and the side wall of the breeding box (4), the water outlet (15) of the breeding box is connected with a biological treatment pond (8) through a micro-filter (7) through a pipeline, the biological treatment pond (8) is connected with a water inlet (9) of the planting box through a pipeline, a water inlet (16) of the breeding box is arranged on the upper side wall of the breeding box (4), a water inlet (16) of the breeding box is connected with a water outlet (10) of the planting box through a pipeline, a fish outlet (17) is arranged at an included angle a between the slope (13) and the side wall of the breeding box (4), and the fish outlet (17) and the water outlet (15) of the breeding box are symmetrically distributed along the center line of the breeding box (4), and the a is 75-85 degrees.

2. A water treatment system based on a fish-vegetable symbiotic mode according to claim 1, characterized in that the lower part of the side wall of the planting box (3) is provided with a planting box water inlet (9) and a planting box water outlet (10), a plurality of groups of planting frames (11) are arranged in the planting box (3), and plants (12) are arranged in the planting frames (11).

3. A aquaponics model based water treatment system according to claim 2, characterized in that said plants (12) comprise water spinach, luffa, balsam pear, watercress or lettuce.

4. The fish-vegetable symbiotic mode-based water treatment system according to claim 1, wherein the fish (18) comprises crucian, grass carp, channel catfish, megalobrama amblycephala, loach, culter ilishaeformis or pelteobagrus fulvidraco.

5. A aquaponics mode based water treatment system according to claim 1, characterized in that the side walls of the aquaponics tank (1) and the water treatment tank (2) are provided with a gate (33).

6. The water treatment method of the water treatment system based on the fish-vegetable symbiotic mode according to the claim 2, characterized by comprising the following steps:

s1, planting plants (12) in a planting frame (11), placing fishes (18) in a culture box (4) provided with a slope (13), enabling water required for planting to flow into a planting box (3) through a planting box water inlet (9) to provide moisture for the plants (12) in the planting frame (11), enabling excess water to flow out of a planting box water outlet (10) and be conveyed to a culture box water inlet (16) through a pipeline, and enabling the excess water to enter the culture box (4) from the culture box water inlet (16);

s2, starting the Roots blower (6), and conveying gas to the aeration pipe (14) through a pipeline to provide sufficient oxygen for the fishes (18) in the culture box (4);

s3, water in the culture box (4) flows out of a water outlet (15) of the culture box, a micro-filter (7) is started at the same time, the water in the culture box (4) is filtered to obtain filtered effluent, and the filtered effluent is conveyed to a biological treatment tank (8) through a pipeline to be subjected to nitrification treatment to obtain nitrified effluent;

s4, enabling the nitrified effluent to flow into the planting box (3) from a water inlet (9) of the planting box through a pipeline;

s5, when the automobile is in severe weather, the initial state is kept, each group of upper top channel steel (22) and each group of lower top gaps (26) correspond to each other, each group of upper top plate gaps (23) and each group of lower top steel plates (25) correspond to each other, and the upper top (19) and the lower top (20) form a non-light-transmitting state;

s6, when the weather is good, the hook (27) is pulled, the lower top (20) slides along the slide way (32), the lower top frame (24) is far away from the right side beam (30), each group of upper top channel steel (22) and each group of lower top steel plate (25) are mutually corresponding, each group of upper top plate gap (23) and each group of lower top gap (26) are mutually corresponding, and a light-transmitting state is formed;

s7, when the good weather turns into the bad weather, the upper top (19) is pushed, the lower top (20) slides along the slide rail (32), the lower top frame (24) is made to be close to the right side beam (30), each group of upper top channel steel (22) and each group of lower top gaps (26) are made to correspond to each other, each group of upper top plate gaps (23) and each group of lower top steel plates (25) are made to correspond to each other, and the upper top (19) and the lower top (20) form a non-light-transmission state.