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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 phases, such as activated sludge processing tanks, where 85 to 90 percent of any remaining solid materials (floating on the surface) are ...
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.
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 ...
In countries where marijuana and hashish are illegal, some retailers specify that bongs are intended for use with tobacco in an attempt to circumvent laws against selling drug paraphernalia. While technically "bong" does not mean a device used for smoking mainly cannabis, drug-related connotations have been formed with the word itself (partly ...
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For improving its ability mass-transfer efficiency ozone micro/nano-bubble(MNB) is an important technology. For improving, gas-liquid contact and mass-transfer effectiveness air microbubbles were used. While in the case of ozone, MNB improves the properties of ozonation or oxidation. [6] [7]
Kief (from Arabic كيف kīf, "Joy, pleasure" [1] [2]), sometimes transliterated as keef, also known as "Dust" and "Chief" a.k.a cannabis crystals among other names, refers to the pure and clean collection of loose cannabis trichomes, which are accumulated by being sifted from cannabis flowers or buds with a mesh screen or sieve.
A marijuana vending machine is a vending machine for selling or dispensing cannabis. They are currently in use in the United States [ 1 ] and Canada [ 2 ] [ 3 ] and some may be located in secure rooms in marijuana dispensaries .