Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7382
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Microbial protein production in activated suspension tanks manipulating C:N ratio in feed and the implications for fish culture
Authors: Azim, Mohammed Ekram
Little, David Colin
Bron, James
Contact Email: d.c.little@stir.ac.uk
Keywords: 100
analysis
C
composition
CULTURE
Development
DIETARY
ENERGY
experiment
FEED
fish
IMAGE
implications
LEVEL
levels
LTD
PROTEIN
QUALITY
RATIO
rights
SIZE
SYSTEM
Systems
Issue Date: Jun-2008
Publisher: Elsevier
Citation: Azim ME, Little DC & Bron J (2008) Microbial protein production in activated suspension tanks manipulating C:N ratio in feed and the implications for fish culture, Bioresource Technology, 99 (9), pp. 3590-3599.
Abstract: The present experiment investigated the possibility of microbial protein production in 2501 indoor tanks by manipulating C:N ratio in fish feed applied. Two different levels of protein feed (35% and 22% CP) resulting in C:N ratio of 8.4 and 11.6, respectively, were applied at 25 g daily in each tank. Tanks were aerated and agitated continuously using a dome diffuser. The experiment was carried out for eight weeks. The biofloc development in terms of VSS and BOD5 was better in the low protein fed tanks than in the high protein fed tanks. An estimated biofloc productivity ranged 3-5 g C m(-3) day(-1). A 3-D image stained with DAPI indicates that the biofloc is comprised of hundreds of bacterial nuclei, size being ranged from 100 to 200 mu m. Biofloc quality was independent of the quality of feed applied and contained more than 50% crude protein, 2.5% crude lipid, 4% fibre, 7% ash and 22 kJ g(-1) energy on dry matter basis. The dietary composition and size of biofloc can be considered as appropriate for all omnivorous fish species. The underlying ecological processes are explained through factor analysis. The potential of using biofloc in fish culture is also discussed.
Type: Journal Article
URI: http://hdl.handle.net/1893/7382
DOI Link: http://dx.doi.org/10.1016/j.biortech.2007.07.063
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Stirling
Aquaculture
Aquaculture

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