Air diffusers with internal structures based on non-scientific principles
Oxygen is hard to dissolve in water
It is difficult to dissolve oxygen in water. The weight of air is only 1/773 the weight of water, hence discharged air bubbles from air diffusers will rise very quickly to the water’s surface. Therefore, the air diffuser must have a strong mixing function that can mix gas and liquid instantaneously. Please be aware that many air diffusers cannot quickly and efficiently dissolve oxygen in water because their internal structures are not designed in accordance with scientific principles.
Porous air diffusers generate only small bubbles, increasing the contact area
Porous air diffusers have many fine pores a few hundred microns in size. In order to dissolve into water as much oxygen as possible, porous air diffusers discharge millimeter-sized bubbles and increase the contact area between water and air. Also, the air flows more slowly and stays in the water longer. This is how the porous air diffuser works. However, porous air diffusers cannot dissolve oxygen effectively in wastewater (containing many impurities) because porous air diffusers simply discharge uniform bubbles about 5–20 mm across. A serious drawback of porous air diffusers is that there is no function to forcibly dissolve oxygen into water. See more details at the link below.
Vertical air diffusers must have a strong gas–liquid mixing function
Before the OHR AERATOR, there was no air diffuser capable of mixing fluids (gas and liquid). OHR’s innovation is that coarse bubbles are discharged from one large opening, then fluids collide and react inside hydrodynamically designed structures. The OHR AERATOR has an excellent reputation in the industry for its effectiveness in wastewater treatment and chemical reaction acceleration. See real-world examples at the link below.
Several vertical air diffusers have recently come onto the market because it has become common knowledge in the wastewater treatment industry that a mixing function is necessary for all air diffusers. However, the discharged bubbles from vertical air diffusers are large in size (small total surface area) and rise quickly, so the gas and liquid must collide strongly in a very short time. In order to improve mixing ability, vertical air diffusers (except OHR) have an overcomplicated internal structure, increasing the risk of clogging. In fact, we have confirmed that there are vertical air diffusers which have become clogged with the carriers (of the MBBR system) or fallen leaves. Vertical air diffusers must have both a strong mixing function and a clog-free mechanism. This is why designing an effective internal structure is so difficult. As a result, all vertical air diffusers except OHR will experience clogging or have inadequate mixing functions.
Effective air diffuser mechanisms are designed according to sound scientific principles
Please evaluate the scientific basis for the mechanism of the air diffuser. An air diffuser is a gas and liquid ‘reactor’. In order for gas and liquid to react efficiently, a mechanism based on physical laws is paramount. The OHR AERATOR has unique structures based on aerodynamics that mix gas and liquid vigorously while preventing clogging. Please see the following mechanism diagram and compare it with other air diffusers.