CN110841499B - System for generating nanobubbles in fluid in which plants or fish are present - Google Patents

Abstract

The invention relates to a system for generating nanobubbles in a fluid where plants or fish are located, comprising at least one nanobubble generator for generating nanobubbles and increasing the amount of dissolved gas; at least two nanobubble generators for controlling nanobubbles an air pump to generate and perform automatic periodic cleaning of the nanobubble generator or other components; and a fluid quality monitoring system to display measured parameters such as dissolved oxygen, pH, conductivity, water temperature and ambient temperature. When utilizing air or oxygen or ozone to generate nano-bubbles, the system of the present invention has application potential for promoting plant growth, improving seed germination rate, and improving the survival rate and growth rate of freshwater fish or sea fish, and the generated ozone nano-bubbles are more Bacteria or algae in water media for plant or fish farming can be reduced.

Description

System for generating nanobubbles in fluids containing plants or fish

technical field

The invention relates to a system for generating nanobubbles in a fluid where plants or fish are located, comprising at least one nanobubble generator for generating nanobubbles and increasing the amount of dissolved gas; at least two nanobubble generators for controlling nanobubbles an air pump that generates and performs automatic periodic cleaning of the nanobubble generator or other components; and a fluid quality monitoring system that displays measured parameters such as dissolved oxygen, pH, conductivity, water temperature, and ambient temperature. When utilizing air or oxygen or ozone to generate nano-bubbles, the system of the present invention has application potential for promoting plant growth, improving seed germination rate, and improving the survival rate and growth rate of freshwater fish or sea fish, and the generated ozone nano-bubbles are more Bacteria or algae in water media for plant or fish farming can be reduced.

Background technique

Oxygen is an essential element for living organisms to breathe. Plants absorb oxygen through pores in their leaves and roots, while fish absorb oxygen through their gills. Plants consume more oxygen at higher temperatures due to increased respiration rates of root tissue. For every 10°C increase in temperature, up to 30°C, the respiration rate of the roots can double. If there is insufficient dissolved oxygen in the water, such as for hydroponic plants, the release of energy from the respiration process for root growth and nutrient uptake will be inhibited. Likewise, fish need more oxygen to breathe at high temperatures. When the dissolved oxygen level in the water drops below 5.0mg/litre, the fish becomes stressed. Oxygen consumption by plants and fish is higher at higher temperatures. When oxygen is depleted, the growth of hydroponic plants and fish will be inhibited.

CN107413219A discloses a system for generating oxidation bubbles less than 500nm in a fluid, comprising a fluid inlet pipe; a Venturi tube; a component with micropores or microslits less than 50 microns, so that the reagent with oxidation properties Delivery into the fluid; a chamber surrounding a component with micropores or microslits that can create a swirling flow to increase the contact time between reagents with oxidizing properties and the fluid and create bubbles in the fluid; a fluid outlet Tube to remove oxidizing air bubbles in the fluid.

CN102657887A discloses a method for disinfecting a soilless cultivation nutrient solution, which includes introducing micronano ozone bubbles into the soilless cultivation solution to sterilize the nutrient solution. The method combines the sterilizing effect of ozone with the use of a micro-nano bubble generating device to dissolve ozone into the nutrient solution to kill bacteria and other organic matter and increase the dissolved oxygen in the nutrient solution.

Contents of the invention

The invention discloses a system for generating nano-bubbles in a fluid where plants or fish are located, comprising at least one nano-bubble generator for generating nano-bubbles and increasing the amount of dissolved gas; a control system with a plurality of electronic units system; at least two solenoid control valves; at least three check valves; at least two air pumps to control the generation of nanobubbles and perform automatic periodic cleaning of nanobubble generators or other components; a gas flow meter; an ozone generator a dissolved ozone measuring device; and a fluid quality monitoring system with a liquid crystal display panel to display measured parameters such as dissolved oxygen, pH value, conductivity, water temperature and ambient temperature.

When using air or oxygen or ozone to generate nanobubbles, it is possible to increase the dissolved oxygen in the water medium for plants or fish. When the nano-bubble generator of the present invention is used in the nutrient water tank of the planting system, the growth rate of the plants will be higher in comparison. When the nano-bubble generator of the present invention is used in the nutrient water tank of the planting system, a higher plant growth rate can be obtained. When the nano-bubble generator of the present invention is used in the fish tank, the survival rate and growth rate of freshwater fish or seawater fish are higher. Using air nanobubbles can increase the germination rate of plants. When ozone gas is used to generate nanobubbles, the stable ozone nanobubbles in water can perform disinfection, such as reducing the bacteria or algae content in water media used for plants or fish. Therefore, the system of the present invention has potential application in agriculture and fishery.

The present invention differs from the prior art in that: the present invention reduces the pressure on the component surface near the micropores or microslits by introducing fluid into the air outlet assembly with micropores or microslits, making the micropores or microslits The bubbles on the surface of the slit are subjected to a strong separation force, resulting in micro-bubbles and even nano-bubbles, so the gas can be introduced into the nano-bubble generator using a relatively low air pressure, such as only normal pressure; The rough component at the outlet disperses the air bubbles produced by the fluid inlet passing through the air outlet component with micropores or micro slits to produce more uniform nano-bubbles; the air pump of the present invention has the function of automatic regular cleaning, which can regularly remove any Fouling on components, especially nanobubble generators and rough component surfaces, such as any undissolved aggregated particles in the nutrient aqueous medium for plants or fish or metabolic waste from fish or plants attached to their surfaces.

Description of drawings

Embodiments of the invention are described in more detail below with reference to the accompanying drawings, in which:

Fig. 1 shows the schematic diagram according to the nanobubble generator of the present invention;

Fig. 2 shows the concentration and the bubble diameter of the nano-bubbles produced by the nano-bubble generator according to the present invention;

Figure 3 shows a schematic diagram of a system according to the invention.

Detailed ways

The present invention provides a system for generating nanobubbles in a fluid where plants or fish are located, comprising at least one nanobubble generator for generating nanobubbles and increasing the amount of gas dissolved; a control system with a plurality of electronic units ; at least two solenoid control valves; at least three check valves; at least two air pumps to control the generation of nanobubbles and perform automatic periodic cleaning of the nanobubble generator or other components; a gas flow meter; an ozone generator ; a dissolved ozone measuring device; and a fluid quality monitoring system with a liquid crystal display panel for displaying measured parameters such as dissolved oxygen, pH value, conductivity, water body temperature and ambient temperature.

Embodiments of the present invention may be better understood with reference to the following examples, which are provided by way of illustration. The invention is not limited to the examples given in this document.

With reference to the schematic diagram of nano-bubble generator of the present invention among Fig. 1, nano-bubble generator of the present invention comprises fluid inlet filter 10, fluid inlet chamber 11, has the component 22 of micropore or micro-slit, in order to pass gas After the inlet filter 20, gas (such as air or oxygen or ozone) is conveyed from the inlet pipe 21 into the fluid. The fluid stored in the fluid tank 1 may be ultrapure water, distilled water, tap water, or a nutrient aqueous medium for plants or fish. When the fluid passes through the gap between the component 22 and the fluid inlet chamber 11, the fluid pump 12 generates a high-speed fluid flow, and the velocity of the fluid increases suddenly to reduce the pressure on the surface of the component 22 near the micropore or microslit, Bubbles on the surface of micropores or microslits are subject to strong separation forces and produce microbubbles or even nanobubbles. The generated microbubbles and nanobubbles are sucked into the fluid pump 12 and forced to disperse over the roughness component 14 to create more uniform and stable nanobubbles in the fluid outlet chamber 13 . By controlling the gas flow rate, the fluid flow rate, and the roughness of the assembly 14, nanobubbles of different concentrations and diameters of the present invention can be produced.

Referring to Figure 2, preferred nanobubbles produced by the present invention have an average bubble diameter of about 100 nm to about 500 nm, more preferably about 100 nm to about 400 nm, as characterized by Malvern ^™ NanoSight ^™ NS300. The preferred concentration of nanobubbles produced by the present invention is at least about 1 x ¹⁰⁷ bubbles per milliliter of fluid, and more preferably at least about 2 x ¹⁰⁷ bubbles per milliliter of fluid.

The fluid inlet filter 10 is used to prevent any undissolved aggregated particles in the nutrient aqueous medium of plants or fish and the metabolic waste of the fish from entering the fluid inlet chamber 11 and preventing them from adhering to the micropores or microslits of the assembly 22. On the surface. The width of the slit is preferably about 0.5 to about 3 mm, and the length of the slit is about 5 to about 15 mm; more preferably, the width of the slit is about 1 to about 2 mm, and the length of the slit is about 5 to about 10 mm.

The gas inlet filter 20 is used to trap any dust or particles from a gas source such as air. The preferred pore size of the gas inlet filter is from about 0.2 µm to about 1 µm, more preferably from about 0.4 µm to about 0.6 µm. Preferred micropores or microslits for delivering gas into fluid inlet chamber 11 of assembly 22 are from about 2 µm to about 70 µm, more preferably from about 2 µm to about 45 µm. Fluid pump 12 is a submersible pump to generate a preferred flow rate of about 2,500 L/hour to about 20,000 L/hour, more preferably about 3,000 L/hour to 12,000 L/hour. The roughness component 14 in the fluid outlet chamber 13 is used to disperse the air bubbles generated by the delivery of the fluid inlet chamber 11 to produce more uniform nanobubbles. The arithmetic mean roughness of the surface of rough component 14 is preferably from about 5 µm to about 50 µm, more preferably from about 5 µm to about 30 µm.

In one embodiment, when the gas source is ozone, the ozone gas can be delivered to the nanobubble generator of the present invention, and the generated ozone nanobubbles are used to reduce bacteria or algae in the nutrient water medium of plants or fish. Fluid inlet filter 10, fluid inlet chamber 11, gas inlet filter 20, gas inlet pipe 21, assembly 22 with micro-holes or micro-slits for delivery of ozone gas, fluid pump 12, assembly for dispersing air bubbles in the fluid 14 And the fluid outlet chamber 13 is made of anti-oxidation or anti-ozone material.

Referring to the schematic diagram of the system of the present invention in FIG. 3, the system for generating nanobubbles in the fluid where plants or fish are located includes at least one nanobubble generator 601 (such as the nanobubble generator described in FIG. 1 ) to generate Nano-bubbles and increase the amount of dissolved gas, a control system 301 including a plurality of electronic units 302, oil-free gas pumps 304 and 306, an ozone generator 303, a dissolved ozone measuring device 307, an electromagnetic control valve 308, and a check valve 309, and A fluid quality monitoring system 501 including a liquid crystal display panel 502 for displaying measured parameters such as dissolved oxygen, pH value, conductivity, water body temperature and ambient temperature.

In this control system 301, the electronic unit 302 includes different electronic components such as 24V power supply, relays, programmable logic controller (PLC) to control the nanobubble generator 601, pump 304, pump 306, corona discharge ozone generation The operation of the device 303 and the solenoid control valve 308. The check valve 309 is used to control the direction of the gas generating nanobubbles generated by using air/oxygen or ozone gas generated by the corona discharge ozone generator 303 in the present invention. When air nanobubbles or oxygen nanobubbles are needed to increase the dissolved oxygen in the fluid, gas such as air or oxygen will be pumped in by the pump 304 and the gas flow rate will be controlled by the gas flow meter 305 . The gas flow rate of the pump 304 is preferably from about 100 L/hour to about 400 L/hour, more preferably from about 200 L/hour to about 300 L/hour.

The diameter of the nanobubbles can be further controlled by the gas flow meter 305 . The gas flow rate for generating nanobubbles is preferably from about 15 mL/minute to about 400 mL/minute, more preferably from about 34 mL/minute to about 200 mL/minute. When ozone nanobubbles are needed for water disinfection (eg to reduce bacteria or algae in the fluid), air or oxygen is delivered to the ozone generator 303 and ozone gas is generated and directed to the gas flow meter 305 . A corona discharge ozone generator is used in the present invention.

The ozone flow rate for generating ozone nanobubbles is preferably from about 15 mL/minute to about 400 mL/minute, more preferably from about 34 mL/minute to about 100 mL/minute. The diameter of the ozone nanobubbles can be further controlled by the gas flow meter 305 . The gas flow rate for generating nanobubbles is preferably from about 15 mL/minute to about 150 mL/minute, more preferably from about 34 mL/minute to about 100 mL/minute. The dissolved ozone measurement device 307 has an internal pump to take a water sample from the nanobubble fluid to measure and display the concentration of ozone in the aqueous medium from about 0 ppm to about 20 ppm.

In addition, a programmable logic controller (PLC) in the electronics unit 302 is used to control the operating frequency of the pump 306 and a solenoid control valve 308 for pumping the pump, preferably from about 2,000 L/hour to about 4,000 L/hour. The gas flow rate is delivered to module 22 to remove any undissolved aggregated particles in the nutrient aqueous medium for plants or fish or metabolic wastes of fish attached to the surface of micropores or microslits to stably generate nanobubbles. In addition, a programmable logic controller (PLC) in electronics unit 302 is also used to control the frequency of operation of pump 306 to deliver a gas flow rate of preferably about 2,000 L/hr to about 4,000 L/hr to rough assembly 14 to Any fouling such as any undissolved aggregated particles in the nutrient aqueous medium of plants or fish or metabolic wastes of fish adhering to the roughened member 14 surface is removed. Like this, rough member 14 is selected from porous ceramic pipe, porous stainless steel pipe, porous glass pipe, porous high-density polyethylene pipe, porous polycarbonate pipe, porous titanium pipe, so that let gas pass through to pipe surface from the middle of pipe, to remove any attached dirt. A residual current circuit breaker (RCCB) is also included in the electronics unit 302 to protect against ground faults.

Dissolved oxygen in water is an important parameter for the survival and growth of plants or fish. The amount of dissolved oxygen in water is affected by the water temperature and ambient temperature. The growth of each plant or fish requires specific pH value and conductivity in water. The fluid quality monitoring system 501 in the present invention is used to monitor the amount of dissolved oxygen, pH value, conductivity, water body temperature and ambient temperature. In the present invention, a fluid quality monitoring system 501 with a liquid crystal display panel 502 is used to display measured parameters such as dissolved oxygen, pH value, conductivity, water body temperature and ambient temperature. The dissolved oxygen probe 504 is connected to the electronic board of the fluid quality monitoring system 501 to measure the concentration of dissolved oxygen in the fluid, which is about 0 mg/L to about 100 mg/L. The pH probe 505 is connected to the electronic board of the fluid quality monitoring system 501 to measure the pH value in the fluid, which is about 1 to about 14. Conductivity probe 506 is connected to the electronics board of fluid quality monitoring system 501 to measure conductivity, which is about 5 µS/cm to about 200,000 µS/cm. A temperature probe 507 is connected to the electronics board of the fluid quality monitoring system 501 to measure the fluid temperature, which is from about -55°C to about 125°C. An ambient temperature sensor is connected to the electronics board of the fluid quality monitoring system 501 to measure the ambient temperature, which is from about -55°C to about 125°C. All measured parameters such as dissolved oxygen, pH value, conductivity, water body temperature and ambient temperature are displayed by the liquid crystal display panel 502 , which is connected to the electronic board of the fluid quality monitoring system 501 .

The present invention will now be explained in detail with reference to Examples, which illustrate the features and effects of the system according to the present invention, but are not intended to limit the present invention thereto.

Example 1

As shown in Figure 1, a nanobubble generator was used to generate nanobubbles in an 80L water tank filled with ultrapure water. The flow rate of the submersible pump 12 is 3,000 L/hour, and the flow rate of the gas entering 21 is 34 mL/minute. The nanobubble generator was allowed to operate for 24 hours prior to measuring nanobubble size and nanobubble concentration while data on dissolved oxygen levels were recorded during operation. Nanobubble diameter and nanobubble concentration were measured by a Malvern ^™ NanoSight ^™ NS300, and dissolved oxygen levels were measured by a Hanna multiparameter measuring instrument HI98196.

The average diameter of the bubbles generated by the nanobubble generator is 156nm, SD is 49.1nm, D10 is 99.7nm, D50 is 149.3nm, D90 is 218.1nm, and the average concentration of nanobubbles is 1.03× ¹⁰⁸ bubbles per milliliter . The dissolved oxygen level was 91.3%. The distribution of bubble diameter and concentration is shown in Fig. 2.

Example 2

As shown in Figure 1, a nanobubble generator was used to generate nanobubbles in an 80L water tank filled with ultrapure water. The flow rate of submersible pump 12 is 12,000 L/hour, and the flow rate of gas entering 21 is 100 mL/minute. The nanobubble generator was allowed to operate for 24 hours prior to measuring nanobubble size and nanobubble concentration while data on dissolved oxygen levels were recorded during operation. Nanobubble diameter and nanobubble concentration were measured by a Malvern ^™ NanoSight ^™ NS300, and dissolved oxygen levels were measured by a Hanna multiparameter measuring instrument HI98196.

The average diameter of the bubbles generated by the nanobubble generator is 177nm, SD is 63.4nm, D10 is 128.6nm, D50 is 142.2nm, D90 is 247.3nm, and the average concentration of nanobubbles is 2.61× ¹⁰⁷ bubbles per milliliter . The dissolved oxygen level was 88.2%. The distribution of bubble diameter and concentration is shown in Fig. 2.

Example 3

As shown in Figure 1, a nanobubble generator was used to remove E. coli and algae in 50 L of water containing metabolic waste from freshwater fish. The flow rate of submersible pump 12 is 3,000 L/hour, and the inlet ozone flow rate into 21 is 34 mL/minute. The initial and final contents of E. coli and algae were measured by membrane filtration method and phytoplankton analyzer (Walz, PHYTO-PAM-II), respectively.

After 4 hours of operation, more than 90% of E. coli (initial: 5,267cfu/100mL) and 26% of algae (initial 12.6ppb) were removed.

Example 4

Jeweled Bass

As shown in Figure 1, the nano-bubble generator is used to generate nano-bubbles in 90L water of raising freshwater fish jewel perch. The flow rate of the submersible pump 12 is 3,000 L/hour, and the flow rate of the gas entering 21 is 200 mL/minute. Fresh water has a pH of 6-7 and a water temperature of 22-25°C. The nanobubble generator was operated during the entire growth period (ie 21 days) of the jewel perch. Using a commercially available aeration stone instead of the nanobubble generator, a control experiment was performed on the same number of fish in an independent fish tank with the same water conditions. In the fish tank with nanobubble generator and aeration stone, the dissolved oxygen is 6ppm and 5ppm respectively. Before and after the growth period, the fish in the two tanks were weighed separately. The growth rate of the gem perch using the nanobubble generator was 44%, while the growth rate of the gem perch in the air stone system was only 16%. Using the nanobubble generator of the present invention, the growth rate of the gemstone perch is about twice that of the aerated stone system.

Sabah Grouper Fish

As shown in Figure 1, the nano-bubble generator of the present invention is used to produce nano-bubbles in the 90L water of the seawater fish Sabah giant grouper. The flow rate of the submersible pump 12 is 3,000 L/hour, and the flow rate of the gas entering 21 is 100 mL/minute. The pH of seawater is 6.5-7.5, the salinity is 27-30ppt, and the water temperature is 23-26°C. The nanobubble generator was operated during the entire growth period (ie 31 days) of the Sabah giant grouper. Using a commercially available aeration stone instead of the nanobubble generator, a control experiment was performed on the same number of fish in an independent fish tank with the same water conditions. In the fish tank with nanobubble generator and aeration stone, the dissolved oxygen is 7ppm and 5ppm respectively. Before and after the growth period, the fish in the two tanks were weighed separately. The growth rate of the Sabah giant grouper using the nanobubble generator was 67%, while the growth rate of the Sabah grouper in the aerated stone system was 61%. Using the nanobubble generator, the growth rate of Sabah lobster was about 10% higher than in the aerated stone system.

Example 5

As shown in Figure 1, the nano-bubble generator of the present invention is used to generate nano-bubbles in 50L of nutrient water for germination of the seeds of Iceleaf japonica. The flow rate of the submersible pump 12 is 3,000 L/hour, and the flow rate of the gas entering 21 is 34 mL/minute. The pH value of the nutrient solution is 6.5-7, the conductivity is 300-500µS/cm, and the nutrient temperature is 19-27°C. The sponges used for seed germination were soaked in the nutrient solution for 24 hours before transferring them to seed germination trays. Pour the nutrient solution containing nanobubbles into the seed germination tray up to the edge of the sponge. Without using a nanobubble generator, the control experiment was carried out in an environment with the same nutrient solution conditions. The dissolved oxygen in the nanobubble system and the control system exceeded 7ppm and 3-5ppm respectively. Using the nutrient solution containing nanobubbles, the seed germination rate of Bingye Rizhonghua was 30%, while that of the nutrient control group was 22%. Using the nano bubble generator, the seed germination rate of Bingye Rizhonghua increased by more than about 30%.

Example 6

As shown in Figure 3, the nano-bubble system of the present invention is used to generate nano-bubbles in the nutrient solution of the hydroponic system for planting water vegetables. The fluid flow rate of nanobubble generator 601 is 3,000 L/hour, and the gas flow rate controlled by 305 is 34 mL/minute. The pH of the nutrient solution is 6-8, the conductivity is 1,300-1,600µS/cm, and the nutrient temperature is 25-27°C. The nanobubble system operates during the entire growth period of the mizuna (i.e. 30 days). Instead of using a nanobubble system, control experiments were also performed in an environment with the same nutritional conditions. Dissolved oxygen in the nutrient tank utilizing the nanobubble system and the control system exceeded 7ppm and 6ppm, respectively. Mizuna grown in both systems were harvested 30 days after sowing. The weight of harvested mizuna grown using the nanobubble system of the present invention is about 20% heavier than that of mizuna grown without the nanobubble system of the present invention.

References in this specification to "one embodiment," "example embodiment," etc. mean that the described embodiments may include a particular feature, structure, or characteristic, but that each embodiment may not necessarily include the particular feature, structure, or structure. or characteristics. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure or characteristic is described in conjunction with one embodiment, it is assumed that those skilled in the art would know that the feature, structure or characteristic would be affected in combination with other embodiments whether explicitly described or not.

Values expressed in range format should be interpreted in a flexible manner to include not only the values explicitly listed as the limits of the range, but also all individual values or subranges contained within that range, as if each value were explicitly listed and subranges. For example, a concentration range of "about 0.1% to about 5%" should be interpreted to include not only the explicitly listed concentrations of about 0.1 wt.% to about 5 wt.%, but also individual concentrations within the specified range (e.g., 1%, 2 %, 3% and 4%) and subranges (such as 0.1% to 0.5%, 1.1% to 2.2% and 3.3% to 4.4%).

As used herein, unless stated otherwise, the term "a" is used to include one or more than one and the term "or" is used to mean a non-exclusive "or". Also, it should be understood that the phraseology or terminology used in this document is for the purpose of description only and not of limitation unless otherwise defined. Furthermore, all publications, patents, and patent documents mentioned in this document are incorporated by reference in their entirety as if individually incorporated by reference. In the event of inconsistent usages between this document and those documents incorporated by reference, the usage in the incorporated references should be considered supplementary to that in this document; for irreconcilable inconsistencies, the usage in this document should be Usage shall prevail.

In the methods described in this document, unless a time or order of operation is explicitly recited, the steps may be performed in any order without departing from the principles of the invention. A statement in a claim that one step is first performed, followed by several other steps, should be taken to mean that the first step is performed before any other steps, but that the other steps may be performed in any appropriate order, unless in the other steps The sequence is further described. For example, the description of "step A, step B, step C, step D and step E" in the claims should be interpreted as that step A is performed first and step E is performed last, while steps B, C and D can be performed between steps A and E in any order and that order remains within the literal scope of the claimed process. A given single step or a subset of steps can also be repeated.

Furthermore, certain steps may be performed simultaneously unless explicitly recited in the claims to be performed separately. For example, the claimed step of performing X and the claimed step of performing Y could be performed simultaneously in a single operation, and the resulting process would be within the literal scope of the claimed process.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, these embodiments and examples are to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (16)

1. A system for generating nanobubbles in a fluid in which plants or fish are located, comprising:

at least one nanobubble generator for generating nanobubbles, which are generated from air, oxygen, ozone and any mixture thereof, and increasing the dissolved amount of gas; and

a control system for controlling the operation of the motor,

wherein the nanobubbles have an average bubble diameter of 100nm to 500nm at a concentration of at least 1 x 10 per milliliter of fluid ⁷ The number of the bubbles is small,

wherein the control system comprises a plurality of electronic units, at least two electromagnetic control valves, at least three check valves, at least two air pumps for controlling the generation of nano bubbles and carrying out regular automatic cleaning on the nano bubble generator, a gas flowmeter, an ozone generator, a dissolved ozone measuring device and a fluid quality monitoring system comprising a liquid crystal display panel for displaying measured parameters,

wherein the nanobubble generator comprises a fluid inlet filter, a fluid inlet chamber, a gas inlet filter, a gas inlet tube, a component for delivering gas and having micro-pores or micro-slits, a fluid pump, a coarse component for dispersing bubbles in the fluid, and a fluid outlet chamber,

wherein the gas inlet conduit connects the gas inlet filter and the assembly of micro-pores or micro-slits located within the fluid inlet chamber, the coarse assembly located within the fluid outlet chamber, the fluid pump located between the fluid inlet chamber and the fluid outlet chamber, the fluid inlet filter disposed in the fluid inlet chamber, the fluid pump producing a fluid flow rate of 2,500L/hr to 20,000L/hr,

wherein the coarse component is selected from a porous ceramic tube, a porous stainless steel tube, a porous glass tube, a porous high density polyethylene tube, a porous polycarbonate tube or a porous titanium tube,

wherein the fluid inlet filter has a slit width of 0.5mm to 3mm; the slit length of the component is 5mm to 15mm, the component with micropores or micro slits generates micro bubbles or nano bubbles, the fluid pump sucks the micro bubbles or nano bubbles and disperses the micro bubbles or nano bubbles on the rough component, the surface arithmetic average roughness of the rough component for dispersing the bubbles in the fluid is 5 μm to 50 μm, and the rough component is positioned in the fluid outlet chamber and forms a gap with the fluid outlet chamber for the dispersed micro bubbles or nano bubbles to pass through,

wherein the at least two gas pumps are oil-free gas pumps, during the generation of nanobubbles, in the fluid inlet chamber of the nanobubble generator, one of the gas pumps gas and the gas flow rate is controlled by the gas flow meter and gas is delivered to the assembly with micro pores or micro slits to generate the nanobubbles at a gas flow rate of 100L/hr to 400L/hr, wherein one of the gas pumps delivers gas to the assembly with micro pores or micro slits in the fluid inlet chamber and/or the coarse assembly in the fluid outlet chamber at a gas flow rate of 2,000L/hr to 4,000L/hr to remove any undissolved aggregated particles in the nutritive aqueous medium of plants or fish or metabolic wastes of plants attached on the surface of the assembly.

2. The system of claim 1, wherein the fluid is ultrapure water, distilled water, tap water, or a nutrient aqueous medium for plants or fish.

3. The system of claim 1, wherein the gas inlet filter of the nanobubble generator has a pore size of 0.5 μm.

4. The system of claim 1, wherein the fluid pump is a submersible pump with a fluid flow rate of 2,500l/hr to 20,000l/hr.

5. The system of claim 1, wherein the fluid inlet filter, the fluid inlet chamber, the gas inlet filter, the gas inlet tube, the component for delivering gas having micro-pores or micro-slits, the fluid pump, the component for dispersing gas bubbles in a fluid, and the fluid outlet chamber are made of a material having oxidation resistance.

6. The system of claim 1, wherein the plurality of electronic units comprise a power source, relays, and a programmable logic controller for controlling nanobubble generation, controlling the type of gas delivered, and automatically periodically cleaning the nanobubble generator.

7. The system of claim 1, wherein the plurality of electronic units comprise residual current circuit breakers to prevent ground faults.

8. The system of claim 1, wherein the solenoid control valve and the check valve within the control system are made of a material having oxidation resistance.

9. The system of claim 1, wherein the gas flow meter is used to further control the diameter of the nanobubbles and to control the gas flow rate between 15 mL/min and 400 mL/min.

10. The system of claim 1, wherein the ozone generator is a corona discharge ozone generator.

11. The system of claim 1, wherein the dissolved ozone measuring device is used to measure and display ozone concentrations between 0ppm and 20ppm in an aqueous medium.

12. The system of claim 1, wherein the fluid quality monitoring system is coupled to a dissolved oxygen probe to measure a dissolved oxygen concentration in the fluid between 0mg/L and 100mg/L.

13. The system of claim 1, wherein the fluid quality monitoring system is coupled to a pH probe to measure pH values between 1 and 14 in a fluid.

14. The system of claim 1, wherein the fluid quality monitoring system is connected to a conductivity probe to measure conductivity between 5 μ S/cm and 200,000 μ S/cm.

15. The system of claim 1, wherein the fluid quality monitoring system is connected to a temperature probe to measure temperatures between-55 ℃ and 125 ℃ fluid.

16. The system of claim 1, wherein the fluid quality monitoring system is coupled to a temperature sensor to measure a near ambient temperature between-55 ℃ and 125 ℃.

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