Tail water treatment system and method for breeding micropterus salmoides offspring seeds by using container

Abstract

The invention discloses a tail water treatment system and method for breeding micropterus salmoides offspring seeds by using containers. The bottoms of a plurality of breeding containers of the tail water treatment system are communicated with a tail water collection pipeline through second branch pipelines; the tail water collecting pipeline is also connected with a water inlet of the microfilter; a water outlet of the microfilter is communicated with a drainage ditch in the vineyard through a third branch pipeline; the vineyard is connected with the right side of the ecological pond through a fourth branch pipeline; according to the method, the purpose of planting the weever and the grape together is achieved, in-situ treatment and ex-situ treatment of the breeding tail water are combined, carps in the breeding container mainly eat residues and residual feed at the bottom of the container, the content of granular nitrogen and phosphorus in total nitrogen and total phosphorus in a water body of the breeding container is reduced, and after the breeding tail water is treated by the microfilter, the content of the granular nitrogen and phosphorus in the water body is reduced. The solid substance is used as a fertilizer for grape growth in a vineyard, grape vines grow better, and duckweed in the ecological purification pond is used for feeding grass carp fries.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a tailwater treatment system and method for culturing California bass fry in a container. Background Art

[0002] Traditional California bass seedling cultivation in earthen ponds is recognized by the majority of farmers because of its low construction and maintenance costs, ecological environment closer to nature, and low technical requirements. However, it also has technical defects such as being greatly affected by the external environment, difficulty in disease prevention and control, and relatively low growth rate and survival rate. In order to overcome the shortcomings of earthen pond seedling cultivation, factory-based seedling cultivation has been developed with strong environmental controllability, easy disease prevention and control, and high production efficiency. As a factory-based high-yield, high-efficiency, high-density, and high-input farming method, containers have the advantages of saving land and water, ecological protection, quality and safety, intelligent standards, intensive and efficient production, etc., providing a new technical model for the green transformation and development of my country's aquaculture.

[0003] The container aquaculture system is aerated in the box, filtered by a microfilter, and the tailwater of the ecological pond (three ponds and two dams) is treated and then circulated into the aquaculture box. However, there are still the following problems in the treatment of aquaculture tailwater: 1) During the feeding process, the aquaculture box is prone to bacterial film growth on the inner wall and bottom of the pond due to excrement and leftover bait, which increases the frequency of cleaning. 2) The insoluble solids formed by excrement and leftover bait in the drainage of the box increase the workload of the microfilter, and the collected solids also involve the problem of reuse. 3) The aquaculture tailwater treated by the ecological pond has high ammonia nitrogen and nitrite content, which is easy to cause stress to the farmed animals after entering the container box, increasing the risk of stress. 4) During the high temperature in summer, the water body passes through the sedimentation tank, aeration tank, and ecological pond of the ecological pond. Due to direct sunlight, the water temperature is high. The high water temperature enters the aquaculture box, which is also prone to diseases under high-density aquaculture conditions, and the biomass renewal of plants planted on floating beds in the ecological pond is limited. Summary of the invention

[0004] The invention provides a tailwater treatment system and method for culturing California bass fry in a container, which solves the problems existing in the prior art.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] The embodiment of the present invention provides a tailwater treatment system for breeding California bass fry in containers, comprising a plurality of breeding containers (1), a water inlet pipeline (2), a tailwater collection pipeline (3), a microfilter (4), a vineyard (5) and an ecological pond (6), wherein the tops of the plurality of breeding containers (1) are connected to the water inlet pipeline (2) through a first branch pipeline (2-1), the water inlet pipeline (2) is also connected to the left side of the ecological pond (6), and the bottoms of the plurality of breeding containers (1) are connected to the water inlet pipeline (2) through a second branch pipeline (3-1 ) is connected to the tail water collection pipeline (3); the tail water collection pipeline (3) is also connected to the water inlet of the microfilter (4); a plurality of rows of grape planting ridges (5-1) and a drainage ditch (5-2) located between two rows of grape planting ridges (5-1) are arranged in the vineyard (5); the water outlet of the microfilter (4) is connected to the drainage ditch (5-2) of the vineyard (5) through a third branch pipeline (4-1); the vineyard (5) is connected to the right side of the ecological pond (6) through a fourth branch pipeline (5-3).

[0007] In an optional embodiment of the present invention, the volume of each breeding container (1) is 25m 3 , the water discharge is 20m 3 , used for California bass fry farming.

[0008] In an optional embodiment of the present invention, the area of ​​the vineyard (5) is 20 mu. When the aquaculture tail water is filtered through the microfiltration machine (4), the solid and liquid are separated, and the remaining bait and feces are collected as fertilizer and applied to the grape planting ridges (5-1).

[0009] In an optional embodiment of the present invention, the ecological pond (6) comprises a sedimentation tank (6-1), an aeration tank (6-2) and an ecological purification tank (6-3); the sedimentation tank (6-1) is connected to the aeration tank (6-2) via a first filter dam (6-4); the aeration tank (6-2) is connected to the ecological purification tank (6-3) via a second filter dam (6-5); the water inlet pipeline (2) is connected to the left side of the ecological purification tank (6-3); and the vineyard (5) is connected to the right side of the sedimentation tank (6-1) via a fourth branch pipeline (5-3).

[0010] In an optional embodiment of the present invention, the area of ​​the ecological pond (6) is 21 mu, of which the area of ​​the sedimentation tank (6-1) is 4 mu, the area of ​​the aeration tank (6-2) is 5 mu, and the area of ​​the ecological purification tank (6-3) is 12 mu. After being purified, the water is extracted in the ecological purification tank (6-3) and enters the breeding container (1) for recycling.

[0011] The embodiment of the present invention provides a method for treating tail water of California perch fry cultured in a container, comprising the following steps:

[0012] Step 1, in-situ treatment of multiple breeding containers (1): each breeding container (1) mainly breeds 4-5g / tail California bass, and is mixed with 25-100 carps. The carps mainly feed on the residues and leftover bait at the bottom of the breeding container (1), thereby reducing the content of particulate nitrogen and phosphorus in the total nitrogen and total phosphorus in the water body of the breeding container (1). The individual weight of the carps is 2-3 times the individual weight of the California bass, so as to avoid being swallowed by the California bass. After 3-4 months of breeding, the containers are divided, and the large-sized California bass seedlings are transferred to the earth pond for further breeding, and the carps are recovered into the breeding container (1) or used for other purposes.

[0013] Step 2, the tail water flows through the vineyard (5) for pretreatment: every afternoon, half an hour after the California bass and carp in the breeding container (1) have eaten, the sewage outlet of the tail water collection pipeline (3) is opened, the breeding tail water is filtered by a microfilter (4), the solid-liquid separation is carried out, the residual bait and feces are collected and applied to the grape planting ridge (5-1) as fertilizer, and the water flows through the drainage ditch (5-2) of the vineyard (5). The breeding stage of the California bass seedlings in the breeding container (1) is exactly the growth stage of the grape vines in the vineyard (5). The grape vines grow on the grape planting ridges (5-1), and the separated solids are placed on the grape planting ridges (5-1) as nutrition for the growth of grapes;

[0014] Step 3, the tail water is purified again in the ecological pond (6): the water flowing out of the vineyard (5) enters the ecological pond (6) with three ponds and two dams through the fourth branch pipe (5-3), the ecological purification pool (6-3) of the ecological pond (6) is equipped with a grid and bamboo poles, duckweed occupies 4 / 5 of the water surface in the upper area of ​​the ecological purification pool (6-3), and is regularly salvaged to control its water surface coverage rate. The salvaged duckweed is used to feed grass carp fry cultured in the earth pond; after the water is purified in the ecological pond (6), it is extracted in the lower area of ​​the ecological purification pool (6-3) and enters the breeding container (1) for recycling.

[0015] Compared with the prior art, the embodiment of the present invention provides a tailwater treatment system and method for breeding California bass seedlings in containers, which has the following beneficial effects: (1) A certain number of carps are put in, which can feed on excrement and residual bait, reduce the generation of container biofilm, and reduce the difficulty of cleaning; at the same time, the amount of suspended particulate matter in the effluent can be reduced, and the load of the microfiltration machine can be reduced. (2) After the tailwater is treated by the microfiltration machine, the solid matter is used as fertilizer for the growth of grapes in the vineyard. The tailwater is introduced into the vineyard soil system. After being treated by the soil system, the content of ammonia nitrogen, nitrite, total nitrogen and total phosphorus can be reduced, and the nutrition and water requirements of grape growth can be met. (3) In the ecological pond of the ecological pond, a duckweed area is designed. The duckweed biomass is updated quickly and can better absorb water nutrients, thereby achieving the purpose of removing excessive nutrients, increasing oxygen and lowering water temperature. At the same time, the duckweed is used to feed grass carp seedlings, thereby accelerating growth and improving survival rate. (4) Combining in-situ and ex-situ treatment methods can significantly reduce the temperature, ammonia nitrogen, nitrite, total nitrogen and total phosphorus content of the breeding tailwater and increase dissolved oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of a tailwater treatment system for breeding California bass fry in containers provided in an embodiment of the present application.

[0018] Figure 2 A schematic diagram of the water quality indicators of the container water body provided in Example 1 of the present application.

[0019] Figure 3 A schematic diagram of water quality indicators at the inlet and outlet of the vineyard soil system provided in Example 2 of the present application.

[0020] Figure 4 A schematic diagram of water quality indicators at the outlet of the ecological purification pool provided in Example 3 of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a tailwater treatment system for breeding California bass seedlings in containers, comprising a plurality of breeding containers 1, a water inlet pipeline 2, a tailwater collecting pipeline 3, a microfilter 4, a vineyard 5 and an ecological pond 6, wherein the tops of the plurality of breeding containers 1 are connected to the water inlet pipeline 2 through a first branch pipeline 2-1, the water inlet pipeline 2 is also connected to the left side of the ecological pond 6, the bottoms of the plurality of breeding containers 1 are connected to the tailwater collecting pipeline 3 through a second branch pipeline 3-1; the tailwater collecting pipeline 3 is also connected to the water inlet of the microfilter 4; a plurality of rows of grape planting ridges 5-1 and a drainage ditch 5-2 located between two rows of grape planting ridges 5-1 are provided in the vineyard 5, the water outlet of the microfilter 4 is connected to the drainage ditch 5-2 of the vineyard 5 through a third branch pipeline 4-1; the vineyard 5 is connected to the right side of the ecological pond 6 through a fourth branch pipeline 5-3.

[0023] The volume of each breeding container 1 is 25m 3 , the water discharge is 20m 3 , used for breeding California bass seedlings. In this embodiment, the breeding container 1 is mainly used to breed California bass, 4-5g / tail, 200-250 / m 3 , and mixed with bottom fish carp. Carp mainly feed on the residues and bait at the bottom to reduce the particulate nitrogen and phosphorus in the total nitrogen and total phosphorus. The stocking density is 25 to 100 per box, and 50 to 100 per box is better. The individual weight should be 2 to 3 times the individual weight of California bass to avoid being swallowed by California bass.

[0024] The area of ​​the vineyard 5 is 20 mu. When the aquaculture tail water is filtered by the microfilter 4, the solid and liquid are separated, and the residual bait and feces are collected as fertilizer and applied to the grape planting ridge 5-1. The ecological pond 6 includes a sedimentation tank 6-1, an aeration tank 6-2 and an ecological purification tank 6-3. The sedimentation tank 6-1 is connected to the aeration tank 6-2 through the first filter dam 6-4, the aeration tank 6-2 is connected to the ecological purification tank 6-3 through the second filter dam 6-5, the water inlet pipeline 2 is connected to the left side of the ecological purification tank 6-3, and the vineyard 5 is connected to the right side of the sedimentation tank 6-1 through the fourth branch pipeline 5-3. The area of ​​the ecological pond 6 is 21 mu, of which the area of ​​the sedimentation tank 6-1 is 4 mu, the area of ​​the aeration tank 6-2 is 5 mu, and the area of ​​the ecological purification tank 6-3 is 12 mu. After the aquaculture tail water is purified by the ecological pond 6, it is extracted in the ecological purification tank 6-3 and enters the aquaculture container 1 for recycling.

[0025] The embodiment of the present invention provides a method for treating tail water of California perch fry cultured in a container, comprising the following steps:

[0026] Step 1, in-situ treatment of multiple breeding containers 1: each breeding container 1 mainly breeds 4-5g / tail California bass, and is mixed with 25-100 carps. The carps mainly feed on the residues and leftover bait at the bottom of the breeding container 1, reducing the content of particulate nitrogen and phosphorus in the total nitrogen and total phosphorus in the water body of the breeding container 1. The individual weight of the carps is 2-3 times the individual weight of the California bass to avoid being swallowed by the California bass; after 3-4 months of breeding, the containers are divided, and the large-sized California bass seedlings are transported to the earth pond for further breeding, and the carps are recovered to the breeding container 1 or used for other purposes;

[0027] Step 2, the tail water flows through the vineyard 5 for pretreatment: every afternoon, half an hour after the California bass and carp in the breeding container 1 have eaten, the sewage outlet of the tail water collection pipeline 3 is opened, the breeding tail water is filtered by the microfiltration machine 4, the solid-liquid separation is carried out, the residual bait and feces are collected and applied to the grape planting ridge 5-1 as fertilizer, and the water flows through the drainage ditch 5-2 of the vineyard 5. The breeding stage of the California bass seedlings in the breeding container 1 is the growth stage of the grape vines in the vineyard 5. The grape vines grow on the grape planting ridges 5-1, and the separated solids are placed on the grape planting ridges 5-1 as nutrition for the growth of grapes;

[0028] Step 3, the tail water is purified again in the ecological pond 6: the water flowing out of the vineyard 5 enters the ecological pond 6 with three pools and two dams through the fourth branch pipe 5-3, and the ecological purification pool 6-3 of the ecological pond 6 is equipped with a grid and bamboo poles. Duckweed occupies 4 / 5 of the water surface in the upper area of ​​the ecological purification pool 6-3, and is salvaged regularly to control its water surface coverage rate. The salvaged duckweed is used to feed grass carp fry in the earth pond; after the water is purified in the ecological pond 6, it is extracted in the lower area of ​​the ecological purification pool 6-3 and enters the breeding container 1 for recycling.

[0029] Example 1

[0030] 1. The effects of different stocking densities of carp on the removal of nutrients from container water are as follows:

[0031] 1.1 Materials and methods, experimental grouping. The experiment was conducted in Wuhan Kangshengyuan Ecological Agriculture Co., Ltd., with a total of 10 containers, each with a volume of 25m 3 , the water discharge is 20m 3 , mainly raising California bass, 4000-5000, 4-5g / tail. Set up a control group and 4 experimental groups, two parallel groups in each group, the stocking amount of carp is 0, 25, 50, 100, 200, and the stocking specification is 10-20g / tail.

[0032] 1.2. Sample collection and index determination. Collect water samples from the container drain outlet, determine pH, total nitrogen, total phosphorus, permanganate index, suspended solids content, and observe the biofilm on the inner wall of the container, the bottom of the pool, the aeration pipe, etc. From June to September, test once at the end of each month.

[0033] 1.3 Results and Analysis. Figure 2 It can be seen from the water quality indicators of container water that: placing different numbers of carp has no effect on the pH value of container water; total nitrogen, total phosphorus, permanganate index and suspended solids content all decrease with the increase in the number of carp placed, among which the suspended solids content decreases most significantly; there is biofilm on the inner wall of the container when 0, 25 and 50 carp are placed, and there is almost no biofilm when 100 and 200 carp are placed. The total nitrogen, total phosphorus and permanganate index contents increase when 200 carp are placed, indicating that placing a certain amount of carp in the container can reduce the total nitrogen, total phosphorus, permanganate index, suspended solids content, and the formation of biofilm in the box, among which it has a significant effect on reducing the total nitrogen, total phosphorus, permanganate index, suspended solids content, and the formation of biofilm in the box, and the best placement is 100 carps / box.

[0034] Example 2

[0035] 2. Effect of vineyard soil treatment system on nitrogen and phosphorus removal from aquaculture tailwater

[0036] 2.1 Materials and methods, test location. The test was conducted at Wuhan Kangshengyuan Ecological Agriculture Co., Ltd., with a total of 10 containers, each with a volume of 25m 3 , the water discharge is 20m 3 , mainly raising California bass, 4,000 to 5,000 pieces, 4 to 5 grams per piece, the tail water is filtered by a microfiltration machine and then discharged into the vineyard.

[0037] 2.2. Sample collection and index determination. At the end of each month from June to September, water samples were collected from the inlet and outlet of the vineyard soil system to determine pH, ammonia nitrogen, nitrite, total nitrogen, total phosphorus, and permanganate index.

[0038] 2.3 Results. Figure 3 It can be seen from the water quality indicators of the inlet and outlet of the vineyard soil system that compared with the inlet, the ammonia nitrogen, nitrite, total nitrogen, total phosphorus, and permanganate indexes in the water at the outlet have all dropped significantly, indicating that the tail water passes through the vineyard soil, and various eutrophic salts are adsorbed and decomposed by the soil system, and the content is significantly reduced, indicating that the vineyard soil system has a good tail water treatment effect. The breeding stage of containerized California bass seedlings is the growth stage of vineyard grapevines. The grapevines grow on ridges, and the water flows through the row spacing between the grapevines, which is equivalent to a surface flow wetland. The tail water passes through the vineyard, on the one hand, the tail water is purified, and on the other hand, the nutrition and water needs of grape growth are met.

[0039] Example 3

[0040] 3. Duckweed removes nutrients from water, increases oxygen and reduces temperature

[0041] 3.1 Materials and methods, test site. The test was conducted at Wuhan Kangshengyuan Ecological Agriculture Co., Ltd., with a tailwater treatment system outside the container. The ecological purification pool (12 mu in area) was set up with a grid and bamboo poles, which was divided into two sections (half each). Duckweed was stocked in the upper half of the test group, accounting for 4 / 5 of the water surface, and its water surface coverage was controlled by regular salvage. The upper half of the control group was an ecological floating bed, on which canna was planted. Aquatic animals were stocked in late June, and the seedlings were placed in the soil pond after the cultivation was completed in late September, and the purified water volume and water quality were tracked and monitored.

[0042] 3.2. Sample collection and analysis. Sampling points were set up at the outlets of the ecological purification pools in the control group and the experimental group, and the conventional physical and chemical indicators of dissolved oxygen (DO), water temperature, and pH value of the water body were measured on site every month. The water quality test mainly analyzed ammonia nitrogen, nitrite, total nitrogen, total phosphorus, permanganate index, and suspended solids content.

[0043] 3.3 Results. Figure 4 From the water quality indicators at the outlet of the ecological purification pool, it can be seen that the pH and dissolved oxygen of the experimental group are higher than those of the control group, while the temperature, ammonia nitrogen, nitrite, total nitrogen, total phosphorus, permanganate index and suspended solids are lower than those of the control group. Total phosphorus is the total concentration of orthophosphate, polyphosphate, hydrolyzable phosphate and organic phosphorus. Total nitrogen is the total concentration of ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and organic nitrogen in the water body. Nitrogen and phosphorus are both necessary nutrients for the growth of algae. The eutrophication of the water body can be effectively evaluated by measuring the content of total phosphorus and total nitrogen. In aquaculture, ammonia nitrogen and nitrite in the water environment are highly toxic and pose a great threat to the health and safety of fish. As a tailwater treatment and purification pond, the removal of these two harmful substances is an important indicator of whether the tailwater can be recycled. The permanganate index, also known as oxygen consumption, is the amount of inorganic and organic matter suspended and dissolved in water that can be oxidized by potassium permanganate (KMnO4) under certain conditions. The larger the permanganate index value, the higher the organic content in the water, and the worse the water quality. The presence of suspended matter in surface water will make the water turbid, reduce transparency, affect the respiration and metabolism of aquatic organisms, and even cause fish to suffocate and die. Therefore, the content of suspended matter in water is one of the indicators to measure the degree of water pollution. The water purified by the ecological purification pools of the experimental group and the control group meets the aquaculture tailwater discharge standards. Compared with canna, duckweed has a better removal effect on nitrogen, phosphorus, organic matter, etc. in the water, and has better cooling and oxygenation effects. The tailwater meets the first-level discharge standard.

[0044] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A tailwater treatment system for breeding California bass fry in containers, characterized in that: The invention comprises a plurality of breeding containers (1), a water inlet pipeline (2), a tail water collection pipeline (3), a microfilter (4), a vineyard (5) and an ecological pond (6), wherein the tops of the plurality of breeding containers (1) are all connected to the water inlet pipeline (2) through a first branch pipeline (2-1), the water inlet pipeline (2) is also connected to the left side of the ecological pond (6), and the bottoms of the plurality of breeding containers (1) are all connected to the tail water collection pipeline (3) through a second branch pipeline (3-1); the tail water collection pipeline (3) is also connected to the water inlet of the microfilter (4); a plurality of rows of grape planting ridges (5-1) and a drainage ditch (5-2) located between two rows of grape planting ridges (5-1) are arranged in the vineyard (5); the water outlet of the microfilter (4) is connected to the drainage ditch (5-2) of the vineyard (5) through a third branch pipeline (4-1); and the vineyard (5) is connected to the right side of the ecological pond (6) through a fourth branch pipeline (5-3).

2. The tailwater treatment system for cultivating California bass fry in containers according to claim 1, characterized in that: The volume of each breeding container (1) is 25m 3 , the water discharge is 20m 3 , used for California bass fry farming.

3. A tailwater treatment system for cultivating California bass fry in a container according to claim 2, characterized in that: The area of ​​the vineyard (5) is 20 mu. When the aquaculture tail water is filtered through the microfiltration machine (4), the solid and liquid are separated, and the remaining bait and feces are collected as fertilizer and applied to the grape planting ridges (5-1).

4. A tailwater treatment system for cultivating California bass fry in a container according to claim 3, characterized in that: The ecological pond (6) comprises a sedimentation tank (6-1), an aeration tank (6-2) and an ecological purification tank (6-3); the sedimentation tank (6-1) is connected to the aeration tank (6-2) via a first filter dam (6-4); the aeration tank (6-2) is connected to the ecological purification tank (6-3) via a second filter dam (6-5); the water inlet pipeline (2) is connected to the left side of the ecological purification tank (6-3); and the vineyard (5) is connected to the right side of the sedimentation tank (6-1) via a fourth branch pipeline (5-3).

5. The tailwater treatment system for cultivating California bass fry in containers according to claim 4 is characterized in that: The ecological pond (6) has an area of ​​21 mu, of which the sedimentation tank (6-1) has an area of ​​4 mu, the aeration tank (6-2) has an area of ​​5 mu, and the ecological purification tank (6-3) has an area of ​​12 mu. After being purified, the water is extracted in the ecological purification tank (6-3) and enters the breeding container (1) for recycling.

6. A method for treating tailwater from breeding California bass fry in a container, characterized in that: The following steps are involved: Step 1, in-situ treatment of multiple breeding containers (1): each breeding container (1) mainly breeds 4-5g / tail California bass, and mixes with 25-100 carps, the carps mainly eat the residues and leftover bait at the bottom of the breeding container (1), reducing the content of particulate nitrogen and phosphorus in the total nitrogen and total phosphorus in the water body of the breeding container (1), and the individual weight of the carps is 2-3 times the individual weight of the California bass, so as to avoid being swallowed by the California bass; after 3-4 months of breeding, the California bass seedlings are divided into boxes, and the large-sized California bass seedlings are transported to the earth pond for further breeding, and the carps are recovered into the breeding container (1) or used for other purposes; Step 2, the tail water flows through the vineyard (5) for pretreatment: every afternoon, half an hour after the California bass and carp in the breeding container (1) have eaten, the sewage outlet of the tail water collection pipeline (3) is opened, the breeding tail water is filtered by a microfilter (4), the solid-liquid separation is carried out, the residual bait and feces are collected and applied to the grape planting ridge (5-1) as fertilizer, and the water flows through the drainage ditch (5-2) of the vineyard (5). The breeding stage of the California bass seedlings in the breeding container (1) is exactly the growth stage of the grape vines in the vineyard (5). The grape vines grow on the grape planting ridges (5-1), and the separated solids are placed on the grape planting ridges (5-1) as nutrition for the growth of grapes; Step 3, the tail water is purified again in the ecological pond (6): the water flowing out of the vineyard (5) enters the ecological pond (6) with three ponds and two dams through the fourth branch pipe (5-3), the ecological purification pool (6-3) of the ecological pond (6) is equipped with a grid and bamboo poles, duckweed occupies 4 / 5 of the water surface in the upper area of ​​the ecological purification pool (6-3), and is regularly salvaged to control its water surface coverage rate. The salvaged duckweed is used to feed grass carp fry in the earth pond; after the water is purified in the ecological pond (6), it is extracted in the lower area of ​​the ecological purification pool (6-3) and enters the breeding container (1) for recycling.

Images