The application of micro nano bubble aerator in water purification

Micro nano bubble water purification technology is a green and environmental protection technology without secondary pollution, which is developed in recent years, which is to mix water containing micro and nano bubbles into water for aeration. Compared with ordinary atmospheric bubbles, micro nano bubbles have unique physical and chemical properties, such as large surface area, surface charge, long time in water, high gas-liquid mass transfer rate, high interface point, and spontaneous free radicals. It is often used in the water treatment in the adsorption and removal of suspended substances, oxidation and decomposition of refractory organic pollutants, the promotion of biological activity by oxygen recovery to water and the reduction of endogenous pollution in sediment.

Purification technology and action principle of micro nano bubble

The properties of micro nano bubbles vary with the size, surface characteristics and life of bubbles. The micro nano bubble has some special physical and chemical properties: large specific surface area, super normal gas solubility, and greatly promoting the reaction speed between gas and liquid; The rising speed is slow, and it has a long retention time in water; The surface has negative charge, which can enhance the adsorption of micro particles in water; The self pressurization dissolves, stimulates a large number of free radicals, can play a strong oxidation and bactericidal property; The micro nano bubble has high bubble density and lateral diffusion; It has significant physiological activity. Because of these special physical and chemical properties, micro nano bubbles have been widely used.

The effect of micro nano aeration technology in improving water quality in the treatment of black smelly river includes:

(1) Adsorption and removal of suspended matter in sewage due to the charge on the surface of micro nano bubble and ζ High potential, the oil and suspended matter in sewage have superior adsorption effect, and have better removal effect for COD, ammonia nitrogen and TP, thus reducing organic matter in water, making water transparency obviously improved and water color improved.

(2) When the micro nano bubble aeration is carried out in the polluted anoxic water area, the active oxygen is continuously supplemented with the consumption of dissolved oxygen in the bubble. It can enhance the biological activity of aerobic microorganism, plankton and aquatic animals in the water, accelerate the biodegradation process of pollutants in water and sediment, and realize the purpose of water quality purification.

(3) The enhanced decomposition of refractory organic pollutants, a large number of hydroxyl radicals released by the micro nano bubble rupture, which are oxidizable and can decompose many organic pollutants. In order to promote the micro bubbles to produce more hydroxyl radicals in water, other strong oxidation hands are often used for synergistic action, such as oxygen or ozone, In order to better play the role of oxidation and decomposition of organic pollutants in wastewater.

(4) The results show that the oxygen content of the surface layer of the river and lake increases with the micro nano bubble aeration, and the aerobic microorganism metabolism activity is stronger. It can effectively inhibit the decomposition process of organic matter of anaerobic bacteria at the bottom of the lake, reduce the release of nitrogen and phosphorus nutrients at the bottom of the water, and block the internal pollution.

Advantages of micro nano bubble aerator

● Small bubble diameter, large specific surface area and high efficiency of gas-liquid mass transfer;

● the rising speed of bubbles is slow and the water stays for a long time, which is conducive to increasing the concentration of dissolved oxygen in water;

● micro nano aeration can reduce the sediment;

● the equipment is corrosion resistant, and the over-current parts are SUS304 stainless steel /316l stainless steel;

● industrial design is adopted, which can operate stably and reliably for 24 hours;

● intelligent control of GPS remote end, without WiFi or card insertion;

● special CPU integrated main board, automatic control of water, electricity and gas parameters;