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Average bubble diameters of 0.9 mm are possible nowadays, using special polyurethane (PUR) or special recently developed EPDM membranes. [3] Fine bubble diffusers have largely replaced coarse bubble diffusers and mechanical aerators in most of the developed world and in much of the developing world. The exception would be in secondary treatment ...
An air diffuser or membrane diffuser is an aeration device typically in the shape of a disc, tube or plate, which is used to transfer air and with that oxygen into the sewage or industrial wastewater. Oxygen is required by microorganisms/bacteria residents in the water to break down the pollutants.
Alternative Medical Marijuana Delivery Systems Gaining Popularity Cannabis BioTech exploring options for patients not wanting to 'smoke pot' FT. LAUDERDALE, Fla.--(BUSINESS WIRE)-- Puget ...
A January 1971 issue of the Marijuana Review also used the term. Etymology The word bong is an adaptation of the Thai word bong or baung ( Thai : บ้อง , [bɔ̂ŋ] ), which refers to a cylindrical wooden tube, pipe , or container cut from bamboo , and which also refers to the bong used for smoking.
Because of their small air openings, fine bubble diffusers cease to have an advantage. Currently, coarse bubble diffusers are the mainstay solution. These diffusers are typically made in the shape of a perforated rectangular pipe called a wide band, or a cap of 3 inches (76 mm) in diameter with an elastomeric membrane. Other varieties of coarse ...
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