Micro/nano bubble aerator
Technical application of micro and nano bubble aerators in water purification
Micro and nano bubble water purification technology refers to mixing water containing micro and nano bubbles into water for aeration. It is a green, environmentally friendly, non secondary pollution water treatment technology developed in recent years. Compared with ordinary atmospheric bubbles, micro and nano bubbles have unique physical and chemical properties, such as large specific surface area, surface charge, long existence time in water, high gas-liquid mass transfer rate, high interfacial sites, and spontaneous generation of free radicals. In water treatment, it is often used for the adsorption and removal of suspended solids, the oxidation and decomposition of refractory organic pollutants, the promotion of biological activity through re oxygenation into water, and the reduction of endogenous pollution in sediment.
Micro-nano bubble purification technology and principle
The properties of micro and nano bubbles vary due to their size, surface characteristics, and lifespan. Micro and nano bubbles have some special physical and chemical properties: large specific surface area, extraordinary gas solubility, greatly promoting the reaction speed between gas and liquid; Slow rising speed and long retention time in water; The surface has a negative charge, which can enhance the adsorption of small particles in water; Self pressurized dissolution can stimulate a large number of free radicals, which can play a strong oxidizing and bactericidal role; Micro and nano bubbles have extremely high bubble density and lateral diffusivity; It has significant physiological activity. Due to these special physical and chemical properties, micro and nano bubbles have a wide range of applications.
The role of micro and nano aeration technology in improving water quality in the treatment of black and odorous rivers includes:
(1) The adsorption and removal of suspended solids in sewage is due to the charge on the surface of micro and nano bubbles ζ With a high potential, it has excellent adsorption effects on oils and suspended solids in sewage, as well as good removal effects on COD, ammonia nitrogen, and TP, thereby reducing organic matter in the water, significantly improving the transparency of the water body, and improving the color of the water.
(2) Promote the biological purification function. When micro and nano bubbles are aerated into polluted anoxic waters, active oxygen is continuously replenished to the water as the consumption of dissolved oxygen in the bubbles increases. This can enhance the biological activity of aerobic microorganisms, plankton, and aquatic animals in the water, accelerate their biodegradation process of pollutants in the water body and sediment, and achieve the goal of water quality purification.
(3) Enhanced decomposition of refractory organic pollutants. When micro and nano bubbles burst, they can release a large number of hydroxyl radicals, which are oxidizing and can decompose many organic pollutants. In order to promote the production of more hydroxyl radicals by micro bubbles in water, other strong oxidation methods, such as oxygen or ozone, are often used for synergistic action to better play the oxidative decomposition role of organic pollutants in wastewater.
(4) To reduce endogenous pollution of the bottom sediment, micro and nano bubble aeration increases the oxygen content of the surface layer of the river and lake bottom sediment, strengthens the metabolic activity of aerobic microorganisms, effectively inhibits the decomposition process of organic matter by anaerobic bacteria in the lake bottom, reduces the release of nitrogen and phosphorus nutrients in the water bottom, and blocks endogenous pollution.
Micro and nano bubble generators are used for water quality purification, mainly to utilize the characteristics of micro and nano bubbles such as efficient oxygen enrichment, promoting biological activity, and improving water flow conditions to prevent the generation of odor in anaerobic environments. Together with supporting green plant biological floating island technology, they improve the material circulation of eutrophic water bodies, achieving the goal of water quality purification and overall water ecological restoration. After running for a period of time, it can be clearly seen that the water quality has been purified and improved to a certain extent. The purification ability of water treated with micro and nano bubbles is much higher than that of water treated with ordinary bubbles under natural conditions.
Advantages of micro and nano bubble aerators:
·Small bubble diameter, large specific surface area for gas-liquid mass transfer, and high efficiency;
·The slow rising speed of bubbles and the long residence time in water are conducive to increasing the concentration of dissolved oxygen in water;
·Micro and nano aeration can achieve sediment reduction;
·The equipment is corrosion resistant, and the overcurrent components are all made of SUS304 stainless steel/316L stainless steel;
·Adopting industrial grade design, it can operate stably and reliably for 24 hours continuously;
·GPS remote intelligent control, without WiFi or card insertion;
·Dedicated CPU integrated motherboard, automatic control of water, electricity, and gas parameters;
