A single-loop urchin-based tail water ecological purification device

Abstract

The utility model provides a kind of based on the tail water ecological purification device of oniscia longidigita, including bottom plate, the right side of bottom plate top is provided with tail water filtration and delivery mechanism for carrying out preliminary filtration to aquaculture water and is set to bottom plate top left side and is used to accommodate oniscia longidigita and purify tail water and purify aquaculture mechanism for tail water. The bottom plate is set to realize the installation of tail water filtration and delivery mechanism and purify aquaculture mechanism, the tail water filtration and delivery mechanism is set to carry out preliminary filtration to the sewage after the cultivation of marine product, the purify aquaculture mechanism is set to hold the tail water of preliminary filtration, while accommodating oniscia longidigita and cultivating, to realize the purification of tail water for subsequent recycling of tail water.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology using Ulva monocranium, specifically to an ecological purification device for tailwater based on Ulva monocranium. Background Technology

[0002] With the increasing demand for seafood, traditional marine fishing can no longer meet market needs. Therefore, seafood farming bases are often set up in inland areas. Since inland aquaculture cannot directly obtain seawater, the water resources required for aquaculture are often artificially prepared. However, in the actual aquaculture process, the aquaculture water is polluted due to the discharge of organisms and the entry of impurities from the environment. If this pollution is not treated, it will affect the subsequent aquaculture of seafood. Direct discharge and re-preparation will increase costs. Traditional aquaculture uses physical or chemical cleaning methods, which can easily lead to the pollution of the prepared seawater, thus affecting the subsequent aquaculture of seafood.

[0003] *Echinochloa unicycle* is an invertebrate belonging to the genus *Echinochloa* in the family Echinodermidae. Also known as sea cucumber, sea worm, or single-ringed spiny eel, it is a pink or purplish-red, elongated cylindrical animal, 100–250 mm in length and 15–30 mm in width. It has a conical short snout at the front for feeding and respiration, and a transverse slit-like anus at the rear, surrounded by 10 to 20 setae to help it anchor itself in the sand or mud. *Echinochloa unicycle* uses its retractable, spoon-shaped snout to dig burrows, using mucus to fix the mud and sand, forming a stable burrow. It is a filter feeder and detritivore, primarily feeding on algae and microorganisms in seawater. It filters seawater by sucking and expelling it through its tail, effectively purifying seawater after aquaculture. Furthermore, the process of purifying seawater allows it to reproduce, further increasing aquaculture profits.

[0004] However, there is currently no efficient and stable wastewater ecological purification device specifically designed based on Ulva monocranium, which limits the large-scale application of Ulva monocranium in the field of wastewater purification. Therefore, developing a wastewater ecological purification device utilizing Ulva monocranium is of significant practical importance. Utility Model Content

[0005] The present invention aims to solve the problems mentioned in the background art by providing an ecological purification device for tailwater based on Ulva unicornu.

[0006] The specific technical solution is as follows: An ecological purification device for tailwater based on Ulva monoringae includes a base plate. The top right side of the base plate is provided with a tailwater filtration and conveying mechanism for preliminary filtration of aquaculture water and a purification and aquaculture mechanism provided on the top left side of the base plate for accommodating Ulva monoringae for aquaculture and purifying tailwater. The tailwater filtration and conveying mechanism includes an installation plate fixedly installed on the top of the base plate and a holding box fixedly installed on the right side of the top of the installation plate. A first water pump is fixedly installed on the rear side of the top left side of the installation plate, and a second water pump is fixedly installed on the top of the installation plate and in front of the first water pump. The holding box is provided with four installation rods, and multiple filter screens are fixedly installed inside the installation rods. The filter screens have progressively smaller apertures from top to bottom. The purification aquaculture mechanism includes an aquaculture cylinder placed on the top left side of the base plate, with aquaculture sand laid at the bottom of the aquaculture cylinder, and a buffer trough fixedly installed on the right side of the inner cavity of the aquaculture cylinder.

[0007] As a preferred embodiment of this utility model, a crossbar is fixedly installed on the top of the mounting rod and above the filter screen.

[0008] As a preferred embodiment of the present invention, the input end of the first water pump is connected to a second conduit, the end of the second conduit extends into the interior of the holding tank, and the output end of the first water pump is connected to a first conduit, the end of the first conduit extending into the interior of the buffer tank.

[0009] As a preferred embodiment of this utility model, the input end of the second water pump is connected to a third conduit, which extends into the interior of the aquaculture tank and is fixedly fitted with a protective cover.

[0010] In a preferred embodiment of this utility model, the output end of the second water pump is connected to a fourth conduit, a valve is fixedly installed on the front side of the fourth conduit, and a threaded pipe is fixedly installed on the front side of the valve.

[0011] As a preferred embodiment of this utility model, a small aquarium water pump is fixedly installed on the inner side of the breeding tube, and the output end of the small aquarium water pump is connected to a mounting cover, and an electric heating tube is inserted into the inside of the mounting cover.

[0012] As a preferred embodiment of this utility model, a temperature sensor is fixedly installed on the left side of the inner cavity of the breeding tube.

[0013] This utility model has the following beneficial effects: 1. Bio-co-purification, high pollutant removal rate Using Ulva monoringii as the core purification agent, combined with multi-layer filtration, a dual purification system of "physical interception + biodegradation" is formed: the multi-layer filter screen with decreasing pore size from top to bottom in the holding tank can first intercept large suspended particles such as uneaten food and feces in the effluent, avoiding impurities from affecting the survival of Ulva monoringii; the Ulva monoringii in the breeding tank can efficiently consume the remaining suspended particles and organic debris through filter feeding, while the microorganisms attached to its body surface and the breeding sand can degrade ammonia nitrogen and total phosphorus in the effluent.

[0014] The Ulva monocranium and the cultured sand form a "biological-matrix" symbiotic system: the cultured sand simulates the natural habitat of the Ulva monocranium, and its porous structure provides a carrier for microorganisms. The burrowing behavior of the Ulva monocranium can disturb the bottom sediment, promote dissolved oxygen exchange in the water, and further enhance the efficiency of microbial degradation, thereby improving the uniformity of effluent purification to more than 90% and avoiding the problem of "incomplete local purification" in traditional treatment methods.

[0015] 2. Reduce breeding costs and improve economic benefits Recycling reduces the cost of fresh water extraction and wastewater treatment; Ulva monocranium can feed on organic debris in the wastewater, reducing the amount of feed required; at the same time, Ulva monocranium itself can be used as natural feed for aquaculture, and can be recycled after purification, increasing additional income. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the tailwater ecological purification device based on Ulva monoringa provided in this embodiment of the utility model; Figure 2 A schematic diagram of the tailwater filtration and conveying mechanism of the tailwater ecological purification device based on Ulva unicornu provided in this embodiment of the utility model; Figure 3 A schematic diagram of the aquaculture cylinder structure of the tailwater ecological purification device based on *Ulva unicornu* provided in this embodiment of the utility model; Figure 4 A schematic diagram of the filter structure of the tailwater ecological purification device based on Ulva monoringa provided in an embodiment of this utility model; Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle view.

[0017] In the attached diagram: 1. Base plate; 2. Tailwater filtration and conveying mechanism; 201. Mounting plate; 202. Holding tank; 203. First water pump; 204. Second water pump; 205. First conduit; 206. Second conduit; 207. Third conduit; 208. Protective cover; 209. Fourth conduit; 210. Threaded pipe; 211. Valve; 212. Filter screen; 213. Mounting rod; 214. Crossbar; 3. Purification and aquaculture mechanism; 301. Aquaculture tank; 302. Temperature sensor; 303. Buffer tank; 304. Small aquarium water pump; 305. Electric heating element; 306. Mounting cover. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example The tailwater ecological purification device based on *Ulva monocranium* provided in this embodiment, such as... Figures 1-5 As shown, the system includes a base plate 1. On the top right side of the base plate 1, there is a tailwater filtration and conveying mechanism 2 for preliminary filtration of the aquaculture water and a purification and aquaculture mechanism 3 on the top left side of the base plate 1 for accommodating and culturing *Urechis monoringii* and purifying the tailwater. The base plate 1 is used to install the tailwater filtration and conveying mechanism 2 and the purification and aquaculture mechanism 3. The tailwater filtration and conveying mechanism 2 is used to perform preliminary filtration of wastewater after aquaculture. The purification and aquaculture mechanism 3 is used to hold the preliminarily filtered tailwater and simultaneously accommodate and culture *Urechis monoringii*, thereby purifying the tailwater for subsequent recycling. The wastewater filtration and conveying mechanism 2 includes an installation plate 201 fixedly installed on the top of the base plate 1 and a holding tank 202 fixedly installed on the top right side of the installation plate 201. A first water pump 203 is fixedly installed on the rear side of the top left side of the installation plate 201, and a second water pump 204 is fixedly installed on the top of the installation plate 201 and in front of the first water pump 203. The holding tank 202 has four installation rods 213 inside, and multiple filter screens 212 are fixedly installed inside the installation rods 213. The filter screens 212 have progressively smaller apertures from top to bottom. The installation plate 201 is used to install the holding tank 202, the first water pump 203, and the second water pump 204. The holding tank 202 is used to filter and collect the wastewater after aquaculture. The first water pump 203 is used to send the filtered wastewater to the purification aquaculture mechanism 3 for further purification. The second water pump 204 is used to discharge the purified wastewater from the purification aquaculture mechanism 3 for subsequent circulation. The purification aquaculture unit 3 includes an aquaculture cylinder 301 placed on the top left side of the base plate 1. The bottom of the aquaculture cylinder 301 is covered with aquaculture sand. A buffer tank 303 is fixedly installed on the right side of the inner cavity of the aquaculture cylinder 301. The aquaculture cylinder 301 is used to hold aquaculture sand, *Ulva unicornu*, and effluent. The aquaculture sand is used to promote the growth of *Ulva unicornu*, and the *Ulva unicornu* is used to purify the effluent.

[0023] A crossbar 214 is fixedly installed on the top of the mounting rod 213 and above the filter screen 212. The crossbar 214 facilitates the removal of the filter screen 212 and the mounting rod 213 from the inside of the holding box 202, thereby enabling the cleaning of the filter screen 212 and facilitating subsequent continuous filtration of the effluent.

[0024] The input end of the first water pump 203 is connected to the second conduit 206, and the end of the second conduit 206 extends into the interior of the holding tank 202. The output end of the first water pump 203 is connected to the first conduit 205, and the end of the first conduit 205 extends into the interior of the buffer tank 303. The second conduit 206, the first water pump 203 and the first conduit 205 are used to send the pre-filtered tailwater inside the holding tank 202 to the interior of the purification aquaculture mechanism 3 for further purification. The buffer tank 303 is used to reduce the flow rate of the tailwater to prevent the tailwater from entering the interior of the aquaculture cylinder 301 and stirring up the aquaculture sand at the bottom.

[0025] The input end of the second water pump 204 is connected to the third conduit 207. The third conduit 207 extends into the interior of the aquaculture tank 301 and is fixedly installed with a protective cover 208. The third conduit 207 and the second water pump 204 extract the purified tailwater from the interior of the aquaculture tank 301.

[0026] The output end of the second water pump 204 is connected to the fourth conduit 209. A valve 211 is fixedly installed on the front side of the fourth conduit 209, and a threaded pipe 210 is fixedly installed on the front side of the valve 211. The fourth conduit 209, the threaded pipe 210 and the valve 211 are connected to the external pipeline, so that the purified tailwater is returned to the aquaculture area for recycling.

[0027] A small aquarium water pump 304 is fixedly installed inside the breeding tank 301. The output end of the small aquarium water pump 304 is connected to a mounting cover 306. An electric heating element 305 is inserted into the inside of the mounting cover 306. The small aquarium water pump 304 is used to realize water circulation inside the breeding tank 301. The mounting cover 306 is used to install the electric heating element 305. The electric heating element 305 is used to heat the circulating water, thereby meeting the temperature requirements for the growth and reproduction of *Ulva septemlobus*. The model of the small aquarium water pump 304 is YJP.

[0028] A temperature sensor 302 is fixedly installed on the left side of the inner cavity of the aquaculture tank 301. The temperature sensor 302 is used to monitor the water temperature inside the aquaculture tank 301, and the model of the temperature sensor 302 is Pt100.

[0029] Working principle: 1. Initialization Preparation: Building a Stable and Clean Basic Environment Before starting the device, basic environmental setup and parameter calibration must be completed to provide stable conditions for subsequent purification operations. Biological and substrate introduction: Lay a 15-20cm thick layer of culture sand at the bottom of the culture tank 301, and introduce healthy single-ringed urticaria with a body length of 5-8 individuals / ㎡. After introduction, let it stand for 24 hours to allow the single-ringed urticaria to adapt to the environment and build initial burrows before starting operation. Avoid initial disturbance to avoid affecting its activity.

[0030] Equipment status verification: Check the installation stability of the filter screen 212 of the tailwater filtration and conveying mechanism 2. The four mounting rods 213 must be in close contact with the inner wall of the holding tank 202. The multi-layer filter screen is arranged with a gradient of pore size from top to bottom to ensure that the interception accuracy is improved step by step. Verify the rotation direction of the first water pump 203, the second water pump 204 and the small aquarium water pump 304 to ensure that the water flow direction meets the design requirements.

[0031] Temperature control system calibration: Connect the circuit of temperature sensor 302 and heating element 305, preset the optimal growth temperature range for single-ringed urticaria through the controller, start the small aquarium water pump 304 to make the water in the breeding tank circulate evenly, and ensure that the temperature sensor monitoring data accurately reflects the overall water temperature.

[0032] 2. Wastewater pretreatment: Multi-stage filtration to intercept impurities The wastewater from seafood farming first enters the wastewater filtration and conveying unit 2, where large particulate impurities are removed through multi-stage physical filtration, reducing the load on subsequent biological purification. Wastewater inlet and gradient filtration: Aquaculture wastewater is injected through the inlet at the top of the holding tank 202. The water flows from top to bottom through multiple layers of filter screens 212. The upper layer of large-pore filter screens preferentially intercepts larger suspended solids such as uneaten feed and fish and shrimp feces. The middle layer of filter screens intercepts small organic debris and algae step by step. The bottom layer of small-pore filter screens filters fine colloidal particles. After pretreatment, the suspended solids removal rate of the wastewater reaches more than 80%.

[0033] Easy maintenance of the filter components: When the water flow rate of the filter screen 212 decreases significantly due to the accumulation of impurities, the operator can hold the crossbar 214 to remove the installation rod 213 and the filter screen as a whole from the holding box 202, rinse the impurities on the surface of the filter screen with high-pressure clean water, and then reinstall it. The entire cleaning process takes no more than 10 minutes, ensuring the continuity of pretreatment.

[0034] Pre-treated wastewater storage and transportation start-up: The wastewater after multi-stage filtration is temporarily stored at the bottom of the holding tank 202. When the liquid level reaches 2 / 3 of the tank height, the first water pump 203 is automatically started, and the temporarily stored pre-treated wastewater is extracted through the second conduit 206 and transported to the purification and aquaculture unit 3 through the first conduit 205.

[0035] 3. Biological purification: Synergistic purification led by Ulva unicinctus The pretreated effluent enters the purification and aquaculture unit 3, where, under the synergistic effect of *Urechis monoringalis*, aquaculture sand, and microorganisms, the core pollutants such as organic pollutants, nitrogen, and phosphorus are degraded. This stage is the core purification link of the device. Buffering and diversion to protect the habitat: The tailwater transported by the first conduit 205 is first injected into the buffer tank 303. The tank adopts an arc-shaped bottom design to prevent the high-speed water flow from washing up the culture sand at the bottom of the culture tank 301. If the culture sand is washed up, it will destroy the cave structure of the single-ringed urchin, causing its filter feeding activity to decrease by more than 30%. The setting of the buffer tank ensures the stability of the biological habitat.

[0036] Intelligent temperature control ensures purification activity: Temperature sensor 302 monitors the water temperature in the breeding tank in real time. When the water temperature is below 15℃, the controller automatically starts the electric heating element 305, and the small aquarium water pump 304 drives the water circulation, so that the heated water is evenly distributed throughout the area, avoiding local water temperature from being too high. When the water temperature rises to 25℃, the electric heating element automatically turns off. Through this intelligent regulation, the water temperature is always maintained in the optimal growth range for Ulva pertusa, ensuring stable purification efficiency.

[0037] 4. Recycling and reuse: High-efficiency reuse of purified effluent The wastewater is recycled and reused through the conveying components of the tailwater filtration and conveying mechanism 2, reducing water consumption in aquaculture. Purified wastewater extraction and anti-clogging protection: When the purified wastewater in the aquaculture tank 301 reaches the discharge standard, the second water pump 204 starts and extracts the wastewater through the third conduit 207. The protective cover 208 at the end of the third conduit can effectively intercept aquaculture sand particles and single-ringed worms, preventing them from entering the pump body and causing blockage.

[0038] Flow control and circulation: The extracted purified wastewater is transported through the fourth conduit 209. Operators can adjust the flow rate through valve 211, and then connect it to the water supply network of the aquaculture area through threaded pipe 210 to realize the recycling of purified wastewater and significantly reduce the cost of fresh water extraction.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wastewater ecological purification device based on *Ulva monocranium*, characterized in that, Includes a base plate (1), and the right side of the top of the base plate (1) is provided with a tailwater filtration and conveying mechanism (2) for preliminary filtration of the aquaculture water and a purification and aquaculture mechanism (3) provided on the left side of the top of the base plate (1) for accommodating and purifying the tailwater. The tailwater filtration and conveying mechanism (2) includes an installation plate (201) fixedly installed on the top of the base plate (1) and a holding box (202) fixedly installed on the right side of the top of the installation plate (201). A first water pump (203) is fixedly installed on the rear side of the top left side of the installation plate (201). A second water pump (204) is fixedly installed on the top of the installation plate (201) and in front of the first water pump (203). Four installation rods (213) are provided inside the holding box (202). Multiple filter screens (212) are fixedly installed inside the installation rods (213). The aperture of the filter screens (212) decreases from top to bottom. The purification aquaculture mechanism (3) includes an aquaculture cylinder (301) placed on the top left side of the base plate (1). The bottom of the aquaculture cylinder (301) is covered with aquaculture sand, and a buffer trough (303) is fixedly installed on the right side of the inner cavity of the aquaculture cylinder (301).

2. The tailwater ecological purification device based on *Ulva unicornu* according to claim 1, characterized in that, A crossbar (214) is fixedly installed on the top of the mounting rod (213) and above the filter screen (212).

3. The tailwater ecological purification device based on *Ulva unicornu* according to claim 1, characterized in that, The input end of the first water pump (203) is connected to the second conduit (206), the end of the second conduit (206) extends into the interior of the container (202), and the output end of the first water pump (203) is connected to the first conduit (205), the end of the first conduit (205) extends into the interior of the buffer tank (303).

4. The tailwater ecological purification device based on *Ulva unicornu* according to claim 1, characterized in that, The input end of the second water pump (204) is connected to a third conduit (207), which extends into the interior of the aquaculture tank (301) and is fixedly fitted with a protective cover (208).

5. The tailwater ecological purification device based on *Ulva uniringii* according to claim 1, characterized in that, The output end of the second water pump (204) is connected to a fourth conduit (209), a valve (211) is fixedly installed on the front side of the fourth conduit (209), and a threaded pipe (210) is fixedly installed on the front side of the valve (211).

6. The tailwater ecological purification device based on *Ulva uniringii* according to claim 1, characterized in that, A small aquarium water pump (304) is fixedly installed on the inner side of the breeding tank (301). The output end of the small aquarium water pump (304) is connected to a mounting cover (306). An electric heating tube (305) is inserted into the inside of the mounting cover (306).

7. The tailwater ecological purification device based on *Ulva monocranium* according to any one of claims 1-6, characterized in that, A temperature sensor (302) is fixedly installed on the left side of the inner cavity of the breeding tube (301).

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