Technical characteristics of micro and nano bubbles and application of oxygen enrichment
Characteristics of micro and nano bubbles
1. The rising speed of micro and nano bubbles is slow (retention), and the rising speed of micro and nano bubbles in water is very slow. It takes tens of minutes for micro bubbles to form and burst. Nanosized bubbles can stay for hundreds of hours, and bubbles with a diameter of 1mm can rise at a speed of 6m/min in water, while bubbles with a diameter of 10 μ The rising speed of m bubbles in water is 3 mm/min, and the latter is 1/2000 of the former.
2. The self dissolution performance of micro and nano bubbles is good, and the gas liquid dissolution efficiency can reach 95-100%.
3. The specific surface area of micro and nano bubbles is large, and the total surface area of bubbles is inversely proportional to the diameter of a single bubble. According to the formula, the specific surface area of a 10 micron bubble is theoretically 100 times larger than that of a 1 millimeter bubble at a given volume. The contact area between air and water has increased by 100 times, and the various reaction speeds have also increased by 100 times.
4. The surface of micro and nano bubbles is charged, and the surface of bubbles carries negative charges. The bubbles have an enhanced adsorption effect on small particles in water, and as the micro and nano bubbles shrink and dissolve, surface charges are concentrated and ionized, resulting in phenomena such as hydrogen and oxygen free radicals.
5. The free radicals generated by micro and nano bubbles are oxidizing, because the micro and nano bubbles are locally in a strong high-temperature and high-pressure state when ruptured, and bubble rupture can generate a large number of excited free radicals, which have strong oxidizing properties. Hydroxyl radicals have a strong oxidation-reduction potential, and their strong oxidation can degrade pollutants such as phenol that are difficult to be oxidized and decomposed in water under normal conditions, which has a good purification effect on water quality.
6. Micro and nano bubbles are bactericidal. The bactericidal property of nano bubbles is unique from that of conventional sterilization technology. The sterilization process of nano bubbles includes two processes: adsorption and killing. The foam generated by gas-liquid two-phase fluid generates strong static electricity due to two-phase friction. This charged bubble can adsorb bacteria and viruses in water. As the bubble shrinks and collapses, a large number of free radicals are excited around the bubble and the ultra-high temperature and pressure generated by the collapse will disinfection and sterilization the adsorbed bacteria and viruses.
7. Micro and nano bubbles have strong stability, and the retention of bubbles can achieve physical and chemical stability of ozone gas and water. The formed ozone micro and nano bubble water has disinfection, sterilization, and oxidation properties.
Application of micro/nano bubble technology in aquaculture
1: Micro-nanobubble oxygenation can rapidly increase the dissolved oxygen in water, reach a supersaturated state, remove the color of water, and reduce BOD, total phosphorus, and ammonia nitrogen in water.
2; Microbubble technology can accelerate the degradation of particulate matter in aquaculture water. Sedimentary particles are suspended in the aquaculture water body along with the current due to the impact of air flow. Due to the good adhesion efficiency of the charge on the surface of the micro bubbles to the suspended particles, a large amount of particles will form on the surface of the micro bubble group water body. These particles enter the suspended state of the water layer from the sediment state at the bottom of the water body, increasing the contact with oxygen in the water body, thereby accelerating the biodegradation of particles and achieving water purification.
3: Micro/nano bubble water contains hundreds of millions of nano bubbles. When the bubbles constantly self compress and burst, they instantly generate high temperature and pressure to form free radicals that can be sterilized and sterilized, promote growth, significantly reduce fish diseases, and reduce drug consumption.
4； Micron bubble oxygenation equipment can upgrade and transform industrial aquaculture industries such as aquaculture oxygenation, high-density fish farming, shrimp, aquatic products detoxification, body purification, and improving the quality and taste of commercial fish.
Advantages of micro/nano bubble generator
Integrated design of machinery, electricity, water, and gas, with built-in oxygen device, ozone unit, micro/nano mixed dissolution device, electronic control device, and instrumentation. The complete machine is compact and beautiful in structure and appearance, and it directly generates ultra saturated micro/nano oxygen-enriched water with disinfection without the need for auxiliary equipment. The concentration and output can be self set and adjusted according to different process requirements in different industries.
Adopt a new nano binuclear dissolution technology;
It can fully dissolve high purity oxygen and ozone in water;
Mobile and easy to integrate with existing equipment and facilities;
The time for the equipment to reach the saturated oxygen-enriched water state is short, (the dissolved oxygen value can be set to automatically start and stop), and the efficiency is high, saving energy consumption;
Robust structure, few components, easy disassembly, easy maintenance, and corrosion resistance;
Produce nanoscale oxygen-enriched water with a particle size of 10-100 nm for nanobubbles;
The concentration of nano oxygen-enriched water produced can be adjusted online;
Corrosion resistant, and the overflow components are made of SUS304 stainless steel/316L stainless steel/PTEF material;
Industrial grade design, stable and reliable for 24-hour continuous operation;
Intelligent control, CPU integrated motherboard intelligent operation, remote control or timing mode;
