Aquaculture pond water circulation device and circulation method

Abstract

The present application relates to the field of aquaculture, and discloses an aquaculture pond water circulating device, which comprises a hydrogen dissolving device, an oxygen dissolving device, a water supply mechanism, a disinfection device and a filtering device. The hydrogen dissolving device reacts hydrogen with clean water received to generate hydrogen water. The oxygen dissolving device reacts oxygen with water received from the aquaculture pond to generate high-oxygen water. The aquaculture pond receives the hydrogen water and the high-oxygen water and cooperates with the disinfection device and the filtering device to reform the water quality environment of the aquaculture pond. The present application constructs a synergistic system of hydrogen water and oxygen water generation, multi-stage filtration and intelligent ultraviolet sterilization, innovatively introduces a water environment-oxygen dissolving-hydrogen concentration triple feedback mechanism, maintains hydrogen molecule biological effectiveness while reducing microbial metabolic energy consumption, and inhibits excessive microbial proliferation through hydrogen water cooperation with disinfection and filtration. The filtering and ultraviolet disinfection significantly optimize water quality, and maximize the biological effectiveness of hydrogen water.

Description

Technical Field

[0001] This invention relates to the field of aquaculture, and more particularly to a water circulation device and method for aquaculture ponds. Background Technology

[0002] Hydrogen-rich water is widely used in high-density aquaculture. Existing hydrogen-rich suspended water aquaculture involves forming a mixed liquid rich in hydrogen and oxygen, which is then poured into a suspended water tank. The oxygen in the tank increases the oxygen content, thereby increasing stocking density and promoting aquatic growth. The hydrogen can reduce the fat content of aquatic animals, improve the accumulation efficiency of flavor substances, and enhance the slimming effect of aquatic animals.

[0003] However, existing hydrogen-enriched water aquaculture still has the following drawbacks:

[0004] 1. Excessive microbial proliferation leads to an imbalance in gas consumption:

[0005] Traditional hydrogen water systems often employ a closed-loop design. During the aquaculture process, uneaten feed, excrement, and other organic matter continuously accumulate, providing a eutrophic environment for heterotrophic microorganisms (such as ammonia-oxidizing bacteria and sulfur-oxidizing bacteria). These microorganisms consume large amounts of dissolved oxygen in the water when decomposing organic matter. At the same time, some facultative anaerobic bacteria also reduce hydrogen as a metabolic energy source, leading to a rapid decline in the concentration of dissolved hydrogen in the water. According to tests, the concentration of dissolved hydrogen in untreated circulating water drops by more than 60% within 48 hours, forcing frequent hydrogen replenishment and significantly increasing operating costs.

[0006] 2. Existing water treatment methods have synergistic defects:

[0007] Some aquaculture ponds attempt to maintain water quality through a combination of physical filtration and chemical disinfection. However, traditional methods such as sand filtration and activated carbon adsorption can only remove large suspended solids and cannot effectively retain microorganisms and dissolved organic matter. While the introduction of chemical disinfectants (such as sodium hypochlorite) can inhibit microbial activity, residual agents can react with hydrogen in a redox reaction, not only reducing hydrogen valence but also generating toxic byproducts such as chloramines, threatening the health of the aquaculture organisms. Summary of the Invention

[0008] The purpose of this invention is to provide a water circulation device and method for aquaculture ponds to solve the above-mentioned problems. The specific technical solution is as follows:

[0009] A water circulation device for aquaculture ponds, applied to aquaculture ponds, is characterized by comprising a hydrogen dissolving device, an oxygen dissolving device, a water supply mechanism, a disinfection device, and a filtration device. The hydrogen dissolving device, oxygen dissolving device, water supply mechanism, disinfection device, and filtration device are respectively connected to the aquaculture pond. The water supply mechanism is used to supply clean water to the hydrogen dissolving device, oxygen dissolving device, and aquaculture pond respectively. The hydrogen dissolving device is configured to react hydrogen gas with the received clean water to generate hydrogen water, and the oxygen dissolving device reacts oxygen gas with the water received from the aquaculture pond to generate oxygenated water. The hydrogen dissolving device and oxygen dissolving device respectively supply hydrogen water and oxygenated water to the aquaculture pond. The aquaculture pond receives the hydrogen water and oxygenated water and, in conjunction with the disinfection device and filtration device, improves the water quality environment of the aquaculture pond.

[0010] As an improvement to the above technical solution, the filtration device includes a filter chamber and a multi-stage screen disposed within the filter chamber.

[0011] As an improvement to the above technical solution, the disinfection device includes an ultraviolet lamp, which is positioned above a horizontal plane.

[0012] As one of the improvements to the above technical solution, the hydrogen concentration in the aquaculture pond is maintained at a level of 490-540 ppb.

[0013] As an improvement to the above technical solution, a first pipe is connected between the aquaculture pond and the filtration device, a second pipe is connected between the filtration device and the disinfection device, and a third pipe is connected between the disinfection device and the aquaculture pond. The water flowing out of the aquaculture pond passes through the filtration device and the disinfection device in sequence for filtration and disinfection before flowing back into the aquaculture pond.

[0014] As one of the improvements to the above technical solution, the ultraviolet lamp has a wavelength of 254nm UVC.

[0015] A circulation method, comprising the above-mentioned aquaculture pond water circulation device, includes the following steps:

[0016] S1. The water supply unit delivers clean water to the hydrogen dissolving device and the oxygen dissolving device, which then generate hydrogen water and high-oxygen water.

[0017] S2A: Detect the dissolved hydrogen or dissolved oxygen content in the aquaculture pond, and deliver hydrogen water and high-oxygen water to the aquaculture pond based on the dissolved hydrogen or dissolved oxygen content.

[0018] S2B: The water in the aquaculture pond is transported to the filtration device for filtration;

[0019] S2C: The filtered water is then transported to a disinfection device for disinfection.

[0020] S2D: The disinfected water is returned to the aquaculture pond.

[0021] As one of the improvements to the above technical solution, the water supply system replenishes the aquaculture pond by delivering clean water based on the water volume in the pond.

[0022] The beneficial effects of this invention are as follows: This patent innovatively introduces a triple feedback mechanism of water environment-dissolved oxygen-hydrogen concentration by constructing a synergistic system of hydrogen-oxygen water generation, multi-stage filtration and intelligent ultraviolet sterilization. This reduces the energy consumption of microbial metabolism while maintaining the bioavailability of hydrogen molecules. The hydrogen water, combined with disinfection and filtration, inhibits the excessive proliferation of microorganisms. Otherwise, the increased biological competition may lead to negative effects. Filtration and ultraviolet disinfection significantly optimize water quality and maximize the bioavailability of hydrogen water.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the water circulation of the present invention.

[0026] Figure 2 This is a schematic diagram of the organ-to-body ratio data of the present invention.

[0027] Figure 3 This is a schematic diagram of the fullness data of the present invention. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-3This invention provides a water circulation device for aquaculture ponds, applied to aquaculture ponds. It includes a hydrogen dissolving device, an oxygen dissolving device, a water supply mechanism, a disinfection device, and a filtration device. The hydrogen dissolving device, oxygen dissolving device, water supply mechanism, disinfection device, and filtration device are respectively connected to the aquaculture pond. The water supply mechanism supplies clean water to the hydrogen dissolving device, oxygen dissolving device, and aquaculture pond. The hydrogen dissolving device reacts hydrogen gas with the received clean water to generate hydrogen water, and the oxygen dissolving device reacts oxygen gas with the water received from the aquaculture pond to generate oxygen-rich water. The hydrogen dissolving device and oxygen dissolving device respectively supply hydrogen water and oxygen-rich water to the aquaculture pond. The aquaculture pond receives the hydrogen water and oxygen-rich water and, in conjunction with the disinfection and filtration devices, improves the water quality environment of the aquaculture pond.

[0030] During the aquaculture process, the continuous accumulation of organic matter such as uneaten feed and excrement provides a eutrophic environment for heterotrophic microorganisms (such as ammonia-oxidizing bacteria and sulfur-oxidizing bacteria). These microorganisms consume a large amount of dissolved oxygen in the water when decomposing organic matter. At the same time, some facultative anaerobic bacteria also reduce hydrogen as a metabolic energy source, leading to a rapid decline in the dissolved hydrogen concentration in the water. Therefore, it is necessary to install filtration and disinfection devices. Specifically, the filtration device includes a filter chamber and a multi-stage screen installed in the filter chamber, while the disinfection device includes an ultraviolet lamp, which is set above the water surface. Preferably, the disinfection device also includes a water flow channel, and the ultraviolet lamp is set above the water flow channel. When the filtered water passes through the water flow channel, it is sterilized by the ultraviolet lamp. The ultraviolet lamp has a wavelength of 254nm UVC, which maintains the hydrogen concentration in the aquaculture pond at a level of 490-540 ppb.

[0031] It should be noted that the ultraviolet lamp disinfection of the present invention needs to be carried out in conjunction with a filtration device. Existing technologies often set the ultraviolet device as an independent module at the end of the circulation pipeline, failing to form a dynamic linkage with the hydrogen dissolving device and the oxygen dissolving device. This fragmented design leads to fluctuations in sterilization efficiency. When the turbidity of the water increases, the ultraviolet penetration rate decreases, and the microbial kill rate drops sharply to below 40%, making it impossible to stably control the number of microbial populations.

[0032] A first pipe connects the aquaculture pond to the filtration device, a second pipe connects the filtration device to the disinfection device, and a third pipe connects the disinfection device to the aquaculture pond. Water flowing out of the aquaculture pond passes through the filtration device and the disinfection device in sequence for filtration and disinfection before flowing back into the aquaculture pond.

[0033] Regarding hydrogen dissolving devices and oxygen dissolving devices, hydrogen dissolving devices are connected to devices that provide or produce hydrogen, and oxygen dissolving devices are connected to devices that provide or produce oxygen. Hydrogen dissolving devices and oxygen dissolving devices can react hydrogen and oxygen with the corresponding water to produce hydrogen-rich water and oxygen-rich water, respectively. For details, please refer to similar mixing mechanisms.

[0034] A circulation method, comprising the above-mentioned aquaculture pond water circulation device, includes the following steps:

[0035] S1. The water supply unit delivers clean water to the hydrogen dissolving device and the oxygen dissolving device, which then generate hydrogen water and high-oxygen water.

[0036] S2A: Detect the dissolved hydrogen or dissolved oxygen content in the aquaculture pond, and deliver hydrogen water and high-oxygen water to the aquaculture pond based on the dissolved hydrogen or dissolved oxygen content.

[0037] S2B. The water in the aquaculture pond is transported to the filtration device for filtration. It should be noted that the filtration device filters 10%-20% of the total water volume of the aquaculture pond per hour.

[0038] S2C: The filtered water is then transported to a disinfection device for disinfection.

[0039] S2D: Return the disinfected water to the aquaculture pond. In step S2A above, it is necessary to set up corresponding pipelines to transport hydrogen water and high oxygen water. These pipelines will transport hydrogen water and high oxygen water and inject them into the disinfected water before returning it to the aquaculture pond.

[0040] The water supply system replenishes the aquaculture ponds with clean water based on the water volume therein.

[0041] The following is relevant data on hydrogen-rich suspended water aquaculture achieved by the present invention using the generation of high-oxygen water and hydrogen water in conjunction with a filtration device and a disinfection device;

[0042] Specifically, three groups of grass carp, approximately 45cm in length and 2000g in weight, were taken from the same aquaculture environment. Two groups were placed in a regular pond and a hydrogen-water pond, respectively, while the visceral-to-body ratio of the third group was measured. The hydrogen concentration in the hydrogen-water pond was maintained at 500ppb, with filtration and disinfection enabled. The fish were kept in this water for 7 days. On day 14, the weight of the grass carp was measured, and the visceral index (visceral-to-body ratio) was also measured. Both water-keeping methods reduced the fatness and visceral-to-body ratio of the grass carp, with a greater decrease in the experimental group. This demonstrates that the hydrogen-water method can accelerate the water-keeping process and improve the quality of the fish.

[0043] Water can be suspended from a regular water tank:

[0044] Days Body length (cm) Weight (g) plumpness 0 45 2060 2.260631 7 45 1990 2.183813 14 45 1900 2.085048

[0045] Hydrogen water tank with suspended water (without filtration and disinfection device):

[0046] Days Body length (cm) Weight (g) plumpness 0 45 2045 2.244003 7 45 1980 2.173002 14 45 1870 2.052003

[0047] Hydrogen water tank with filtration and disinfection device:

[0048] Days Body length (cm) Weight (g) plumpness 0 45 2020 2.216735 7 45 1930 2.11797 14 45 1800 1.975309

[0049] The relevant organ-to-body ratio data are as follows:

[0050]

[0051] According to the viscera-to-body ratio data, the viscera-to-body ratio of aquaculture using hydrogen-water suspension tanks is significantly lower than that of aquaculture using ordinary water suspension tanks and aquaculture without suspension tanks.

[0052] Furthermore, this invention employs conventional water suspension, hydrogen-water suspension without disinfection and filtration, and hydrogen-water suspension combined with disinfection and filtration to measure and compare the visceral ratio and condition factor data. A control group (water not used for aquaculture) is also provided. Specific data are as follows:

[0053]

[0054] It can be seen from the above table:

[0055] Viscosity ratio: ordinary water (6.6%), hydrogen water without filtration and disinfection (6.3%), hydrogen water with filtration and disinfection (6%). This shows that hydrogen water can reduce metabolic stress, but microbial metabolism still consumes energy when not disinfected. After disinfection and filtration, the water quality is further optimized.

[0056] Fatness: Ordinary hanging water (2.1) > Hydrogen water without filtration and disinfection (2.06) > Hydrogen water with filtration and disinfection (1.96). Explanation: Hydrogen water can help fish lose weight. Combined with disinfection and filtration, it reduces microbial competition and significantly improves the health of fish.

[0057] Water environment indicators, namely turbidity and suspended solids: ordinary water > hydrogen water without disinfection > hydrogen water with filtration and disinfection → the control group was the best. The reason is that ordinary water has the highest turbidity due to the accumulation of organic matter; hydrogen water without disinfection partially degrades organic matter, but does not filter residual particles; the disinfection and filtration system effectively removes suspended solids.

[0058] Total microbial count: 3.5 × 10⁻⁶ for unsterilized hydrogen water. 6 )> Ordinary IV drip (2.8×10 6 Hydrogen water + disinfection (5×10) 3 Among them, the group with hydrogen water without disinfection had more microorganisms than the group with ordinary water, because hydrogen provides metabolic substrates for some microorganisms, which accelerates their proliferation when not disinfected;

[0059] It is evident that hydrogen water can improve aquaculture results, but it needs to be combined with disinfection and filtration to inhibit excessive microbial proliferation. Otherwise, it may lead to negative effects due to increased biological competition. Filtration and ultraviolet disinfection significantly optimize water quality (turbidity reduced by 75% and microbial inactivation by more than 99%), maximizing the biological efficacy of hydrogen water.

[0060] However, hydrogen-rich water technology faces a key challenge in practical applications: maintaining stable water quality. To achieve efficient utilization of hydrogen-rich and high-oxygen water, high-oxygen and hydrogen-rich water are continuously injected into the aquaculture ponds to maintain certain levels (dissolved oxygen ≥ 7.0 mg / L, hydrogen concentration 490-540 ppb), supplemented by ultraviolet (UVC 254 nm) sterilization to inhibit excessive microbial proliferation. However, this process leads to water quality fluctuations, which exacerbate stress responses in fish. In systems without strict quantity control, water quality fluctuations can increase fish mortality by 15%-20%. Furthermore, while UV lamps can inactivate over 99% of microorganisms, their indiscriminate killing effect destroys beneficial bacteria in the water (such as nitrifying bacteria), leading to increased ammonia nitrogen (NH3) and nitrite (NO2). - The accumulation of these substances further exacerbates the deterioration of water quality.

[0061] To this end, the present invention also provides some embodiments that optimize the sterilization effect of ultraviolet lamps based on the above-mentioned filtration device. For example, the multi-stage screen includes: a first-stage screen: a 50μm stainless steel screen (intercepting large organic particles) and a second-stage screen: a 20μm activated carbon filter element (adsorbing dissolved organic matter).

[0062] Ultraviolet lamp type: low-pressure mercury lamp, adjustable power (30W-100W), 254nm UVC wavelength, its irradiation intensity is adjusted by PWM (pulse width modulation) power control, intensity range 50-200μW / cm². 2 .

[0063] The water flow channel has a pipe diameter of DN100 (inner diameter 100mm), the water flow velocity is controlled at 0.2-0.5m / s (adjusted by a variable frequency pump), and the contact time is 1.5-2.5 minutes (corresponding to a dose of 15-25mJ / cm). 2 The main purpose is to achieve a sterilization efficiency of 60%-70% (reducing the total number of microorganisms to 30%-40% of the initial value); water quality stability, namely dissolved oxygen fluctuation ≤ ±0.5mg / L, hydrogen concentration fluctuation ≤ ±20ppb, pH fluctuation ≤ ±0.2, to selectively inhibit harmful bacteria (such as ammonia-oxidizing bacteria and Vibrio) and retain some beneficial bacteria (such as nitrifying bacteria);

[0064]

[0065] Preferably, when the number of microorganisms is greater than 2 × 10⁻⁶. 4 When the concentration is CFU / mL, ozone can be used to assist in sterilization (concentration 0.1 mg / L, lasting for 10 minutes);

[0066] The hydrogen-oxygen water ratio is 1m³ / min. 3Water, 40L of hydrogen water (hydrogen concentration 1.0ppm) and 80L of high-oxygen water (dissolved oxygen 10mg / L) were injected; the actuators required for the test and the connection to the PLC control system are well known to those skilled in the art;

[0067] The following is a comparison of the effects of different UV sterilization efficiencies on microorganisms, hydrogen consumption, and fish mortality (based on a simulation of an approximate initial water quality environment):

[0068]

[0069] At low sterilization efficiency (<60%): high microbial residues and heterotrophic bacteria (such as ammonia-oxidizing bacteria) consume large amounts of hydrogen as metabolic energy, leading to a significant increase in the proportion of hydrogen consumption; when sterilization efficiency >70%: high-intensity ultraviolet sterilization destroys beneficial bacteria (such as nitrifying bacteria), leading to ammonia nitrogen accumulation (ammonia nitrogen concentration increases from 0.2 mg / L to 0.8 mg / L), while dissolved oxygen and pH fluctuations intensify, triggering stress responses in fish and increasing mortality.

[0070] This embodiment uses adjustable ultraviolet dosage, multi-stage filtration, and dynamic feedback mechanisms to stably control the sterilization efficiency at 60%-70%, inhibiting harmful bacteria while retaining beneficial bacteria, significantly reducing water quality fluctuations (dissolved oxygen, hydrogen concentration, and pH stability are improved by more than 50%), reducing stress reactions and even death in aquaculture fish raised in hydrogen-rich water due to significant changes in the water quality environment, and combined with real-time monitoring and backup measures, it can be safely applied to low- and medium-density aquaculture scenarios.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An aquaculture pond water circulation device applied to a breeding pond, characterized in that, The device comprises a hydrogen dissolving device, an oxygen dissolving device, a water supply mechanism, a disinfection device and a filter device, which are connected with the breeding pool respectively, the water supply mechanism is used for supplying clean water to the hydrogen dissolving device, the oxygen dissolving device and the breeding pool respectively, the hydrogen dissolving device is configured to react hydrogen with the received clean water to generate hydrogen water, the oxygen dissolving device is configured to react oxygen with the water received from the breeding pool to generate high-oxygen water, the hydrogen dissolving device and the oxygen dissolving device are configured to deliver the hydrogen water and the high-oxygen water to the breeding pool respectively, and the breeding pool is configured to receive the hydrogen water and the high-oxygen water and cooperate with the disinfection device and the filter device to reform the water quality environment of the breeding pool. The breeding pool is connected with the filter device through a first pipeline, the filter device is connected with the disinfection device through a second pipeline, and the disinfection device is connected with the breeding pool through a third pipeline, and the water flowing out of the breeding pool is filtered and disinfected in sequence by the filter device and the disinfection device and then flows back into the breeding pool. The disinfection device comprises an ultraviolet lamp, the wavelength band of the ultraviolet lamp is 254nm UVC, the irradiation intensity of the ultraviolet lamp is adjusted by PWM (pulse width modulation) control power, the intensity range of the ultraviolet lamp is 50-200μW / cm², the inner diameter of the second pipeline or the third pipeline is 100mm, the water flow velocity in the second pipeline or the third pipeline is 0.2-0.5m / s, the water flow contact time is 1.5-2.5 minutes, and the light irradiation time of the ultraviolet lamp is 1.5-2.5 minutes, so that the sterilization efficiency of the ultraviolet lamp reaches 60%-70%.

2. A water recirculating system for an aquaculture tank as claimed in claim 1 wherein: The filter device comprises a filter bin and a plurality of levels of screen meshes arranged in the filter bin.

3. A water recirculating system for an aquaculture tank as claimed in claim 1, wherein: The ultraviolet lamp is arranged above a horizontal plane.

4. A circulation method applied to the water circulation device for aquaculture ponds according to claim 1, characterized in that, The device comprises the following steps: S1, the water supply mechanism delivers clean water to the hydrogen dissolving device and the oxygen dissolving device respectively, and the hydrogen dissolving device and the oxygen dissolving device generate hydrogen water and high-oxygen water; S2A, the content of dissolved hydrogen or dissolved oxygen in the breeding pool is detected, and hydrogen water and high-oxygen water are delivered to the breeding pool based on the content of dissolved hydrogen or dissolved oxygen; S2B, the water in the breeding pool is delivered to the filter device for filtration, and the filter device filters 10%-20% of the total water quantity of the breeding pool per hour; S2C, the filtered water is delivered to the disinfection device for disinfection; S2D, the disinfected water is flowed back to the breeding pool.

5. A recycling process according to claim 4, characterized in that: The water supply mechanism delivers clean water for replenishment based on the water quantity in the breeding pool.

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