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Foam fractionation is a chemical process in which hydrophobic molecules are preferentially separated from a liquid solution using rising columns of foam.It is commonly used, albeit on a small scale, for the removal of organic waste from aquariums; these units are known as "protein skimmers".
Diatomaceous earth filters has been generally accepted to be the top contender for removing pollutants while having a high efficiency rate. When applied to pool filtration, a DE filter has demonstrated its capability in capturing varying particle sizes to maintain water clarity.
Tannins can be used for production of anti-corrosive primers for treating rusted steel surfaces prior to painting, converting rust to iron tannate and consolidating and sealing the surface. The use of resins made of tannins has been investigated to remove mercury and methylmercury from solution. [76]
An aquarium (pl.: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish , invertebrates , amphibians , aquatic reptiles , such as turtles , and aquatic plants .
Removing solids reduces bacteria growth, oxygen demand, and the proliferation of disease. The simplest method for removing solids is the creation of settling basin where the relative velocity of the water is slow and particles can settle at the bottom of the tank where they are either flushed out or vacuumed out manually using a siphon.
The same type that is used in aquariums, though any small gravel can be used, provided it is washed first. Indeed, plants growing in a typical traditional gravel filter bed, with water circulated using electric powerhead pumps, are in effect being grown using gravel hydroponics, also termed "nutriculture".
Phlorotannins are a type of tannins found in brown algae such as kelps and rockweeds [1] or sargassacean species, [2] and in a lower amount also in some red algae. [3] Contrary to hydrolysable or condensed tannins, these compounds are oligomers of phloroglucinol [ 4 ] (polyphloroglucinols). [ 5 ]
Many white wines require the removal of all potentially active yeast and/or lactic acid bacteria if they are to remain reliably stable in bottle, and this is usually achieved by fine filtration. Most filtration in a winery can be classified as either the coarser depth filtration or the finer surface filtration . [ 4 ]