subject: Function Of-fine-bubble Diffuser In Industries [print this page] Buyers of fine bubble diffusers for their sewage cure plant or industrialized waste products water remedy plant have many alternatives to get when choosing equipment for their task.
Fine bubble diffusers are accessible in several designs, like discs, tubes, squares, and rectangular panels, and in different resources, including elastomers like EPDM and porous medium like Aluminum Oxide, Porcelain, or HDPE. Several books and papers have been published on the variations between these media.
But, there are still several questions regarding the supremacy or application of disc vs. tube vs. panel.
Several of the suppliers in the industry make several types of diffuser, though they seem to prefer and promote one moreso than the others, typically for business factors (they have a greater edge on one product) or for factors of products difference (when given by a client or technician, it is hard to locate "equal" rivals).
Several tests of oxygen transfer performance have been completed around the years on each kind of diffuser (some of which are released in the ATV Handbuch), but products growth is active, and what was examined in the mid 1980's might not utilize today to contemporary discs, tubes and panels.
There are some sense ideas to comply with, regardless of the growth of the approaches.
In a correctable system made from costly stainless steel, the diffuser, which can handle the most air with the minimum stainless infrastructure, is going to be a beautiful option. Typically, tube fine bubble diffusers are seen on retrievable systems for this cause.
In specified process where the pipes are bolted to the floor, and longevity and low maintenance are necessary, disc fine bubble diffusers are much more popular than tubes.
Where failure mode is essential (i.e. catastrophic vs. slow) disc fine bubble diffusers might be favored over tubes. Tube fine bubble diffusers typically have a large air orifice, therefore if there is a membrane rupture or clamp failure; a big volume of air can get away from that orifice, starving the remainder of the system.
The deeper the tank, the much less advantage panel fine bubble diffusers offers with regards to effectiveness. Panels are typically made to produce quite fine bubbles. In a shallow tank, this is a benefit, albeit a pricey one because panel systems generally bear a heavy cost tag because of the level of devices needed to purchase and install. However, in a deeper tank, a lot of the oxygen is transferred by the time the bubble has risen 15 ft that the bubble is stated to be oxygen exhausted, thus the advantage disappears. One must also be cognizant of the head loss of panel fine bubble diffusers, as what is gained with regards to performance from small bubbles is generally missing in extra power necessary to get over the high back pressure of panel membranes.
Irrespective of the kind of diffuser, one should consider PTFE coated membrane fine bubble diffusers, which might extend the lifetime of the membrane and will also decrease surface fouling also.
Usually fine bubble diffusers are installed in the same tank with flow boosters. This is the case for the Oxidation Ditch process, for instance.
