NIKUNI aeration pumps have been widely used in various water treatment equipment in different application fields at home and abroad for decades. Based on more than 70 years of experience in industrial pump design and application and combined with the needs of equipment manufacturers to develop different application devices, NIKUNI has provided them with technical support and cooperation during the application process as much as possible and developed many technologically advanced application devices.
In the field of traditional water treatment equipment, NIKUNI aeration pump greatly simplifies the process design and overall structure of related equipment with its unique technical features, effectively improving the mixing effect of gas and liquid and increasing the added value of equipment while reducing equipment costs.
NIKUNI Aeration pump can suck in a certain proportion of gas (air, functional gas) while sucking in liquid (water or other liquids). With the high-speed rotation and pressurization process of the impeller, the liquid and gas are evenly mixed and sent into the outlet pipeline of the pump. Due to its structural characteristics, NIKUNI aeration pump is less susceptible to cavitation during gas-liquid mixing and its performance remains stable for a long time during use. Additionally, the operation and maintenance of the pump and related equipment are also more convenient.
The fine bubbles in the water mixed and released by the NIKUNI aeration pump basically reach the micro level (bubbles of 10-30 micron account for an absolute proportion). The dissolved gas saturation tank used with NIKUNI aeration pump is much smaller in size than traditional equipment and generally does not require the use of bubble discharge discs, which can avoid shutdown failures caused by blockage of the discs during use. The gas-liquid mixing efficiency of the NIKUNI aeration pump can reach over 95%, which is higher than conventional gas-liquid mixing processes.
NIKUNI aeration pump can be equipped with various auxiliary accessories according to practical application needs. In some special applications, certain accessories help to make the bubbles released after gas-liquid mixing invisible to the naked eye at the nanoscale, bringing higher added value to equipment manufacturers and end users.
In order to deepen users' understanding of the production of micro bubble water by gas-liquid mixing pumps and the related application fields of aeration pumps, we have collected and organized the following information based on the practical application experience of NIKUNI aeration pumps for reference.
1、 About micro bubbles
There are tiny bubbles in liquids, and bubbles with a diameter below 100 μm are called fine bubbles, while bubbles with a diameter below 100nm are called microbubbles. Due to the fact that the volume of bubbles has reached the molecular level, they possess physical and chemical properties that conventional macroscopic large bubbles do not have, such as an increase in surface area by tens of thousands of times, a rapid increase in dissolved oxygen in water, a small volume with a slow rise rate, the ability to remain in water for a long time, and the ability to adsorb organic matter in water with surface charges.
Micro bubbles released into water generally appear as dense white smoke, while bubbles of nano level released into water cannot be recognized by the naked eye (requiring the use of laser equipment for identification).
2、 Characteristics of micro bubbles
1. Increased surface area
Under the same volume of air, the more bubbles there are, the larger the surface area of the bubbles, and the larger the total area of contact between the bubbles and water. Various biochemical reactions also increase exponentially.
2. Slow ascent speed
The rising speed of bubbles in water is proportional to the square of the bubble diameter. Compared with macroscopic large bubbles, nano size bubbles can remain in water for a long time because their volume has reached the molecular level and their buoyancy effect can be almost negligible. For example, when a bubble with a diameter of 1mm rises at a speed of 6m/min in water, and a bubble with a diameter of 10 μm rises at a speed of 3mm/min in water, the latter is 1/2000 of the former. If considering the increase in specific surface area, the solubility of nano bubbles is 200000 times higher than that of ordinary air.
3. It can automatically increase pressure and dissolve
The dissolution of micro bubbles in water is a process in which the bubbles gradually shrink. The increase in pressure increases the rate of gas dissolution, and with the increase in surface area, the rate of bubble shrinkage becomes faster and faster, ultimately dissolving into water. In theory, the pressure exerted on the bubbles when they are about to disappear is infinite.
dissolution, which can greatly improve the solubility of gases (air, oxygen, ozone, nitrogen, carbon dioxide, etc.) in water.
4. Surface electrification
The gas-liquid interface formed by micro bubbles in water has a greater attraction to anions than cations, resulting in negative charges on the surface of the bubbles. This allows micro bubbles to adsorb organic matter in water and also has antibacterial effects.
3、 Application of Micro Bubble Preparation Equipment
1. Aquaculture
A) Quickly increase dissolved oxygen content
The principle of micro bubble oxygenation is different from the conventional microporous rubber tube oxygenation method. After injecting bubbles into the aquaculture pond, the oxygen concentration in the water rapidly increases, and micro bubbles can diffuse to every part of the pond on their own, resulting in a uniform distribution of dissolved oxygen;
B) Shorten the breeding cycle
Due to the fact that the diameter of micro bubbles has reached the molecular level, they can be directly absorbed by aquatic animal cells, penetrate the cell wall, and act directly on the inside of the cells, thereby improving the metabolism of aquatic products, promoting growth, achieving early release from the pond, staggered listing, and high price sales; This effect also greatly reduces various risks in aquaculture;
According to a report by NHK TV in Japan, the breeding cycle of this fish using oxygen enriched water has been shortened from the usual 24 months to 14 months;
C) Increase breeding density
Due to the ability of bubbles to remain in water for a long time, using bubbles for aquaculture can increase the density of aquaculture under the same conditions. For example, in a water tank with a volume of 2m * 2m * 1.5m, 1.5 times high-density bream aquaculture is carried out. After 5 minutes, the oxygen in the water does not decrease but increases, and the oxygen concentration increases from 7.6mg/L to 7.9mg/L. Within 25 minutes, the oxygen concentration gradually increases to 8.3mg/L;
D) Save medication costs
Nano bubble water is fundamentally different from oxygen powder (calcium peroxide) sold in the market, reducing the cost of repeated dosing for farmers. At the same time, due to the significant increase of bubbles in the water, the growth of anaerobic bacteria can be suppressed to a certain extent, keeping the water clean, reducing the investment cost of disinfectants and avoiding secondary pollution of aquatic product growth by disinfectants;
E) Leading technology
In nanobubble water, the number of bubbles per milliliter has increased by at least one order of magnitude, reaching up to 4.0 × 107 nanobubbles per milliliter, far superior to inefficient production methods such as ultrasound or electrolysis;
F) Do not add any chemicals
It can quickly increase the dissolved oxygen in water in a short period of time. The process of injecting bubbles into water is 100% physical reaction, without adding any chemical substances, and has zero pollution to aquatic products and the surrounding environment; The micro bubble generation device is made of food grade stainless steel, which is corrosion-resistant and durable, and has no effect on the growth of aquatic products.
2. Agricultural hydroponic cultivation
Based on the same principle, irrigating between ridges or using drip irrigation pipes to apply water containing fine bubbles, nutrients, or ozone gas during the planting process of agricultural fruits, vegetables or grain crops can significantly increase the supply of oxygen nutrients to crop roots or improve sterilization effectiveness to protect plants from disease.
Taking the cultivation of ginger or strawberries as an example, when farmers apply liquid containing microbubbles to the roots of crops, the roots and stems of the crops become much thicker than before, with stronger disease resistance and better growth.
3. Food preservation
In terms of food preservation applications, the main methods are to sterilize fruits, vegetables, raw meat, and fresh fish with ozone water or to fill the storage tank with nitrogen gas infused water containing nanoscale nitrogen to isolate the air, ensuring that the preservation time of these fresh fruits, vegetables, fresh meat, and fresh fish is extended several times compared to the conventional situation without adding ozone or nitrogen. This not only ensures the reliable and fresh quality of the products delivered to users, but also helps businesses avoid economic losses caused by improper preservation.
4. Ozone water sterilization and disinfection
Ozone gas produced through discharge tubes or electrochemical methods is a broad-spectrum strong oxidizing bactericide. Functional micro odorous oxygen infused water can achieve harmless non thermal sterilization. Due to its strong oxidizing and sterilizing ability without secondary residue, it has been widely used in drinking water, medical pure water treatment, high-rise secondary water supply sterilization, swimming pool water treatment, aquaculture water treatment, circulating cooling water treatment, industrial wastewater and sewage treatment for many years.
Ozone micro bubble water is also a widely used disinfection and sterilization medium obtained by uniformly dissolving ozone gas into water in the form of micro bubbles using a gas-liquid mixing pump. It can replace various disinfection and sterilization agents.
Due to limited space and the fact that common knowledge about ozone applications can be obtained online, the specific application of ozone water will not be elaborated here.
5. Wastewater and sewage treatment
A) Quickly increase the dissolved oxygen in water
When a large number of micro nano level bubbles are injected into water, the dissolved oxygen level of the water can be rapidly increased, promoting the growth of aerobic bacteria. Aerobic bacteria can quickly decompose organic matter in water; Simultaneously inhibiting the growth of anaerobic bacteria, effectively controlling water deterioration, and maintaining water cleanliness. Compared with conventional micro porous bubble oxygenation methods, nano o bubbles do not quickly float and dissipate, but can remain in water for a long time, greatly improving water quality and achieving the effect of water purification;
B) Quickly purify water quality and improve transparency
According to environmental requirements, air, oxygen, or negative oxygen ions can be injected into water. When negative oxygen ions are injected into water, the effect of water purification can be achieved within 60 minutes. Due to its extreme instability, ozone can decompose into oxygen on its own within 30 minutes. As ozone is a substance that exists in nature, it will not have any impact on the surrounding environment and human body in outdoor environments;
C) Adsorption and Separation of Organic Compounds in Water
Research has found that due to the surface charge of nano bubbles, they can adsorb organic matter in water, causing them to float or sink, thereby achieving rapid cleaning; It can also reduce eutrophication caused by organic matter deposition, effectively control water pollution, oil pollution and other problems;
D) No need to add any enzymes or nutrients
Compared with conventional river aeration and oxygenation methods, the NIKUNI aeration pump discharges a large number of micro bubbles into the river water, prolonging their retention in the water by many times. At the same time, it can reduce the dosage of chemicals, lower the cost of chemical input, and reduce the secondary pollution and post-treatment costs of chemicals on the environment;
6. High end leisure bathing facilities
NIKUNI aeration pump has been widely used in the field of high-end leisure bathing facilities. The main applications include:
A) Milky bath
Release micro bubble water in the bathtub or bath, turning the bath water into a thick milky white color like milk, allowing the bather to feel the refreshing sensation when the micro bubbles come into contact with the skin in the water.
In some high-end bathing facilities, merchants also use the milky white water surface of the bathhouse as a screen, and use projection devices to cast beautiful videos on the water surface in a dim atmosphere accompanied by soft music, allowing bathers to relax and feel the wonderful atmosphere of a fairyland;
B) Functional water fitness bath
Release micro carbonated water or a certain concentration of hydrogen water in a bathtub or bath, allowing bathers to enjoy the maintenance and health benefits of different media of micro functional micro carbonated water on human body.
C) Comfortable and Enjoyable Bath
Project LED lights of different colors in the micro bubble water bath to create a beautiful and enjoyable atmosphere with ruby, sapphire, and emerald tones, allowing bathers to enjoy the pleasure of bathing and maintain their skin while feeling the beauty of time;
With the promotion and popularization of the application technology of the NIKUNI aeration pump, many domestic equipment manufacturers have also begun to promote similar leisure and entertainment bathing facilities.
NIKUNI aeration pumps have a wide range of product specifications, with materials such as cast iron and stainless steel corresponding to various applications. At the same time, NIKUNI also provides technical support related to pump applications to users. You are welcome to purchase NIKUNI products.