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Please use this identifier to cite or link to this item: http://purl.org/purl/4046

Title: Mass production of nitrifying bacterial consortia for the rapid establishment of nitrification in saline recirculating aquaculture systems
Authors: Bright Singh, I S
Rosamma, Philip
Cini, Achuthan
Rejish Kumar, V J
Manju, N J
Keywords: Ammonia oxidizing consortia
Nitrifying bacteria
Mass production
Maximum specific growth rate
Nitrification
Yield coefficient
Issue Date: 15-Nov-2008
Publisher: Springer
Abstract: Two distinct nitrifying bacterial consortia, namely an ammonia oxidizing non-penaeid culture (AMO NPCU-1) and an ammonia oxidizing penaeid culture (AMOPCU-1), have been mass produced in a nitrifying bacterial consortia production unit (NBCPU). The consortia, maintained at 4 C were activated and cultured in a 2 l fermentor initially. At this stage the net biomass (0.105 and 0.112 g/l), maximum specific growth rate (0.112 and 0.105/h) and yield coefficients (1.315 and 2.08) were calculated respectively, for AMONPCU-1 and AMOPCU-1 on attaining stationary growth phase. Subsequently on mass production in a 200 l NBCPU under optimized culture conditions, the total amounts of NH4 ?–N removed by AMONPCU-1 and AMOPCU-1 were 1.948 and 1.242 g/l within 160 and 270 days, respectively. Total alkalinity reduction of 11.7–14.4 and 7.5–9.1 g/l were observed which led to the consumption of 78 and 62 g Na2CO3. The yield coefficient and biomass of AMONPCU-1 were 0.67 and 125.3 g/l and those of AMOPCU-1 were 1.23 and 165 g/l. The higher yield coefficient and growth rate of AMOPCU-1 suggest better energy conversion efficiency and higher CO2 fixation potential. Both of the consortia were dominated by Nitrosomonas-like organisms. The consortia may find application in the establishment of nitrification within marine and brackish water culture systems.
Description: World J Microbiol Biotechnol (2009) 25:407–414 DOI 10.1007/s11274-008-9905-1
URI: http://dyuthi.cusat.ac.in/purl/4046
Appears in Collections:Bright Singh I S

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