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|Title:||Development of nitrifying bacterial consortia for immobilizing in nitrifying bioreactors designed for penaeid and non-penaeid larval rearing systems in the tropics|
Kumar, V.J. Rejish
|Keywords:||Nitrification;Bacterial consortia;Nitrifying bioreactors;Hatchery systems;Penaeids;Non-penaeids;Shrimp;Prawns|
|IPC Code:||Int.Cl.⁸ (2006)C12Q 1/00|
|Abstract:||Two ammonia oxidizing (AMOPCU-1 and AMONPCU-1) and two nitrite oxidizing (NIOPCU-1 and NIONPCU-1) consortia for activating nitrifying bioreactors and thereby establishing nitrification in penaeid and non-penaeid hatchery systems were developed by enrichment. For further amplification of the consortia a simple medium having seawater (either salinity 30 ‰ or 15 ‰) as base, supplemented with NH₄⁺-N/NO₂⁻-N and PO₄⁻ and pH adjusted to 8 was identified. During the amplification in a fermentor the consortia exhibited excessive wall growth and diminished their yield coefficient posing difficulty in harvesting the cells completely. The consortia consisted of both Gram negative and Gram-positive bacterial cells embedded in a mucilaginous matrix of glycocalyx - like material presumably composed of polysaccharides. The consortia besides being useful in activating nitrifying bioreactors developed for shrimp/prawn hatchery systems can also be used as bioaugmentors in the bioremediation of ammonia and nitrite toxicity in aquaculture systems.|
|Appears in Collections:|| IJMS Vol.35(3) [September 2006]|
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