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Micro-Fine Bubble Diffusers The Alab Micro-Fine Bubble Diffusers produce tiny bubbles which provide rapid gas transfer for use with air or oxygen in applications such as municipal potable and waste water treatment, and in aquaculture aeration. Micro-fine bubbles are also useful in flotation separation applications where particles suspended a liquid attach to the bubbles and are lifted to the surface. This revolutionary patented low cost diffuser operates at a very low pressure and prevents the pores from clogging in two ways; The first way is that the diffuser resists reverse flow of the liquid into the diffuser when the gas supply is turned off. The second way that the diffuser resists clogging is that the pores are flexible. The flat diffuser surface also helps to maintain the efficiency by reducing coalescence of the bubbles as they leave the surface. Domed and tubular diffusers cause the bubbles to coalesce meaning they bump into and merge with one another creating larger bubbles.
The goal in obtaining higher efficiencies for aeration or oxygenation of municipal water, wastewater or aquaculture tanks and ponds, is to reduce the gas flow and pressure so that less pumping energy is needed. With Alab diffusers, the required gas low can be reduced because smaller bubbles have a larger surface area than the same volume of gas in larger bubbles. The larger surface area means that the gas dissolves faster in the liquid. The pressure drop through Alab Micro-fine bubble diffusers is approximately 1-2 PSI. This is much lower than competitive fine bubble diffusers that typically require 30 PSI produced by more expensive pumps with greater electric consumption. Another benefit of small bubbles is that they rise more slowly in the liquid than larger bubbles. This is due to an increase in the friction ratio of gas to liquid. The term friction is used because it is easier to visualize the slower rising bubble slowed by friction. For an example picture one large bubble about one inch in diameter. Imagine how fast that single bubble would rise through a body of water. Now contrast that single large bubble with thousands of bubbles about one half millimeter in diameter released into the same body of water at the same time and depth. These tiny bubbles resemble smoke as they rise. The multitude of smaller bubbles would reach the surface much later than the large single bubble. This increase in friction with the liquid means that the gas bubbles can drag more liquid along as it rises therefore creating greater lift per volume of gas. The technology behind the
diffuser is protected by several patents. Standard Size DiffusersPlease use the order form available here.
Additional Information for Stock Diffusers
How to Order:Stock Diffusers - Please fill out the online order form available here and select the pay by credit card option to use your credit card to make your payment through PayPal® or print and mail order form with payment to the address on the form.
To order in quantities exceeding ten please contact us for a quote. Custom Sized and Shaped diffusers are available. - Contact us with size / shape requirements for a quote. The normal set up charge for a custom diffuser is US$600.00. Alab, LLC is seeking partners for global distribution. Please contact sales@alabdiffusers.com for details. |
High
density aquaculture requires an efficient and reliable
method of oxygenating the water. When used with oxygen
as the feed gas the Alab Micro-Fine Bubble Diffuser is
exceptionally efficient at dissolving oxygen in water at
depths
as little as three feet (1 m). This is accomplished
with-out any additional power. The diffusers operate at
a 1-4 psi (6.9 - 27.6 kPa) diffuser surface pressure
drop also known as Dynamic Wet Pressure (DWP). This is
sufficiently low that the pressurized oxygen supply with
a regulator will provide the power to operate the entire
system.
The
rapid gas transfer is useful in supporting biological
reactors such as those used in wastewater treatment
plants. Supplying the oxygen to activated sludge
reactors is the largest energy consumer in the activated
sludge process. Any reduction in energy consumption can
result in significant savings in cost of plant
operation.
