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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
Authors: Achuthan, Cini
Kumar, V.J. Rejish
Manju, N.J.
Philip, Rosamma
Singh, I.S.Bright
Keywords: Nitrification
Bacterial consortia
Nitrifying bioreactors
Hatchery systems
Issue Date: Sep-2006
Publisher: CSIR
IPC CodeInt.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.
Page(s): 240-248
ISSN: 0379-5136
Source: IJMS Vol.35(3) [September 2006]

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