Ozone micro/nano bubble generator for wastewater treatment
Micro-nano bubbles are small bubbles with diameters of micrometers and nanometers. They have slow rising speed, long residence time, high dissolution efficiency in water, and possess characteristics such as self oxygenation, negative charge, and rich in strong oxidizing free radicals. The adsorption and removal of micro and nano bubbles from suspended solids not only has a high potential generated by surface charges, but also has a large specific surface area. Therefore, the combination of micro and nano technologies and coagulation processes in wastewater pretreatment has shown good adsorption effects and efficient removal rates for suspended solids and oils, as well as good removal effects for COD, ammonia nitrogen, and total phosphorus. Enhanced decomposition of organic pollutants Hydroxyl radicals released when micro and nano bubbles burst can oxidize and decompose many organic pollutants. It has shown potential application prospects in refractory wastewater treatment and sludge treatment. In order to promote the production of more hydroxyl radicals by micro and nano bubbles in water, other strong oxidation methods, such as pure oxygen and ozone, are often used for synergistic action, in order to better play the role of oxidative decomposition of organic pollutants in wastewater.
Using ozone as the carrier gas for micro and nano bubbles is more likely to generate a large number of hydroxyl radicals, with an oxidation capacity of 2.8 ev, which is second only to fluorine (2.87 Ev). Hydroxyl radicals are intermediate products of the reaction and can induce subsequent chain reactions. Their electron affinity is 569.3 KJ, which can pull H out of saturated hydrocarbons and undergo self oxidation of organic compounds, thereby degrading organic compounds that are difficult to treat by conventional biological methods. The combination of ozone and micro/nano bubbles can significantly increase the concentration of ozone solubility in water. Due to the slow release effect of the ozone micro/nano bubbles present in the generated ozone water, it can extend the residence time of ozone in water and significantly improve the utilization rate of ozone, reaching over 95-99%. Compared with ordinary advanced oxidation methods, the ozone micro/nano bubbles have only 30-50% ozone utilization rate; Micro-nano bubbles not only have a high potential generated by surface charges, but also have a large specific surface area. The smaller the volume of the bubble, the higher the potential generated at the interface, and the better the adsorption of charged particles in the corresponding water body. In an inclined reaction tank, due to high internal pressure, micro and nano bubbles will continue to contract and exhibit their own pressurization effect during the rising process. During the volume contraction process of micro and nano bubbles, due to the increasing specific surface area and internal pressure, more ozone gas is dissolved into water through the bubble interface, improving the utilization rate of ozone.
When treating refractory organic pollution wastewater, using micro and nano ozone with low cost, high yield, and high concentration under alkaline environmental conditions can generate more ozone? OH participates in the reaction of pollutants, changing its molecular structure and chemical properties to become easily degradable substances, which is more effective and competitive than electrolysis technology. Combined with traditional biochemical processes, it can effectively remove chromaticity and refractory organic substances and reduce the cost of pollution control. It has a broad application prospect in chemical, pharmaceutical, printing and dyeing industries.
After the wastewater is treated by ozone micro/nano bubble superoxidation, the content of phenolic and aromatic compounds that are difficult to degrade in the wastewater is greatly reduced. The lower the content of aromatic hydrocarbons in the wastewater, the higher the ratio of BOD to COD in the wastewater, and the better the biodegradability. Moderate treatment through ozone micro/nano bubble superoxidation can improve the biodegradability of wastewater, and then reduce COD in wastewater through biochemical methods, which will be more economically reasonable.
Advantages of ozone micro/nano bubble generator device
The Zhongjing micro/nano bubble generator is designed with an integrated design of electricity, water, and gas, with built-in ozone device, mixing and dissolving device, electronic control device, and instrumentation. It directly generates high concentration micro/nano ozone water output without auxiliary equipment. The concentration and output can be set and adjusted according to different process requirements of different industries.
·Adopt new integrated technology and start with one touch;
·Can fully dissolve high concentration ozone in water, producing high concentration ozone bubble water;
·Mobile and easy to integrate with existing equipment and facilities;
·The equipment has short time to reach saturation state, high efficiency, and saves energy consumption;
·Solid structure, few components, easy disassembly and assembly, easy maintenance, and corrosion resistance;
·Produce nanoscale ozone water, with a particle size of 10 to 100 nm for nano ozone bubbles;
·The concentration of generated nano ozone water can be adjusted online;
·Corrosion resistant, overflow components are made of 304/316L/2205 stainless steel/PTEF material;
·Adopting industrial grade design, it can operate stably and reliably for 24 hours continuously;
·Intelligent control, CPU integrated motherboard intelligent monitoring.
