{"id":15641,"date":"2021-01-29T21:29:30","date_gmt":"2021-01-29T19:29:30","guid":{"rendered":"http:\/\/fishconsult.org\/?p=15641"},"modified":"2021-01-29T21:29:36","modified_gmt":"2021-01-29T19:29:36","slug":"biological-filters-in-intensive-aquaculture","status":"publish","type":"post","link":"https:\/\/fishconsult.org\/?p=15641","title":{"rendered":"Biological filters in intensive aquaculture"},"content":{"rendered":"\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nReview:\nAbdel Rahman El Gamal (Founder of the website)\n\n\n\n<\/p>\n\n\n\n

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The\ninserted pictures show substrates used in intensive aquaculture systems. As\nshown, the shapes of such substrates may vary although they have a main\ncharacteristic in common which is a high surface\/volume ratio. Added to that,\nthe substrates used in biological filters should enjoy strong mechanical\nresistance, limited clogging chances and of course its availability at\naffordable prices.<\/p>\n\n\n\n

No\nmatter what shape and contents of biological filters, its main function of the\nfilter substrates is to create favorable conditions for the two bacterial\ncolonies in order to perform the nitrifying process whereas Nitrosomonas<\/em> sp.\noxidize the ammonia to nitrite, and then Nitrobacter <\/em>sp. complete the\nnitrification process through the oxidation of nitrites into nitrates bearing\nin mind that ammonia is the most dangerous part of the metabolic wastes\nproduced by the fish while   nitrate is almost not toxic to fish.<\/p>\n\n\n\n

Biological\nfilters are required in closed systems as it allows for the partial re-use of\nwater as well as saving energy in case of heated water. In addition to reducing\nheating (or cooling) costs, such filters reduce the impact on the environment\nthrough the minimum water discharge.<\/p>\n\n\n\n

Typically,\na biological filter is submersed in a separate tank and colonized by nitrifying\nbacteria. In order for the filter to perform the nitrification process as\nplanned, it requires stable physical and chemical parameters, a permanent\nsupply of ammonia and adequate levels of oxygen.\n\nThe biological filter\nis, within a re-circulation system, the more complex component, to the extent\nthat it can be considered almost a living organism. As such it requires stable\nphysical and chemical parameters, a permanent supply of food (ammonia) and adequate\nlevels of oxygen.\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Review: Abdel Rahman El Gamal (Founder of the website) The inserted pictures show substrates used in intensive aquaculture systems. As shown, the shapes of such substrates may vary although they have a main characteristic in common which is a high surface\/volume ratio. Added to that, the substrates used in biological filters should enjoy strong mechanical … <\/p>\n

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