Oxygen utilization rate of microporous aerator

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The microporous aeration pipe oxygenation system consists of a three-leaf fan, a main air pipe, a bronchus, a microporous aeration branch pipe or an aeration plate. The microporous tube is installed at the bottom of the tank, and the fresh air evenly overflows through the microporous tube in the form of microbubbles. The microbubbles are in full contact with the water to achieve efficient aeration and rapid oxygenation.

 

   1. The function and scope of application of the installation structure of the microporous aerator

 

   EPDM rubber membrane microporous aeration diffusers are increasingly used in sewage treatment aeration tanks, aquaculture tanks, polluted reservoirs and other water bodies, becoming a very common aeration device for water bodies. Microporous aeration belongs to blast aeration, which is to send compressed air from an air compressor or blower to an air diffusion device installed at the bottom of the water body through a pipeline system, also called aeration device. The air dissipates in the water in the form of bubbles, and the water body is oxidized by the oxygen mass transfer at the bubble interface.

 

   2. Factors that determine the aeration performance of the microporous aerator

 

   There are many factors that determine the oxygenation performance of the blast aeration system, such as: oxygen volume mass transfer coefficient, oxygen utilization efficiency, power efficiency, resistance loss, uniformity of gas distribution, service life, installation form, etc.

According to the characteristics of the aeration system, the aeration performance is not considered. A large number of studies have shown that in the microporous aeration system, the initial diameter of the bubbles escaping from the aeration tube is the key to the aeration performance. The characteristic of the microporous aerator is that the The length of the air pipe, the ventilation volume, the immersion depth of the aeration pipe or the input air pressure vary. Under a certain submerged depth and aeration tube length, the oxygen utilization rate decreases with the increase of the aeration flow rate. The stirring effect of air bubbles cannot be ignored. The oxygen utilization rate is more sensitive to the aeration flow rate than to the aeration tube length.


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