| Innovative aquaculture based on the production of microbial floc (biofloc) |
| Paper ID : 1079-ICIAQUA |
| Authors |
|
Hossein Adineh * Associate Professor of Aquaculture, Department of Fisheries Science, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Golestan, Iran. |
| Abstract |
| Biofloc technology (BFT) as an economic and environmentally sustainable aquaculture system combines the removal of residual nutrients from the water with the generation of microbial communities. In BFT aquaculture, heterotrophic bacteria can be stimulated by manipulating the C/N ratio (increasing C/N ratio to morethan 10), limiting water exchange, removing solids, and increasing aeration and circulation within cultivation tanks. The growth rate of heterotrophic bacteria is ten times greater than nitrifying bacteria. the bacteria stick together with many other organisms and organic substances, forming biofloc, which can be used as a proteinaceous food source. Microbial flocs continuously provide additional protein (essential amino acids), polyunsaturated fatty acids, vitamins and minerals. By maintaining an adequate carbon to nitrogen ratio (C:N > 15), the capability of heterotrophic bacteria to assimilate the inorganic nitrogen may be elevated, resulting in an enhancement of water quality and more production of the microbial proteins in the BFT culture system. Microbial flocs are consumed by the cultured fish all day long. Moreover, BFT can help to reduce feed and production costs and water usage in fish culture. So, The biofloc system have beneficial effects on growth, feed utilization, digestive enzyme activities, immune system and robustness against stress and diseases. In this connection, various studies have been published; in this research we investigate the effects of biofloc on storage density, reduction of food protein in the diet, reduction of feeding rate, etc. |
| Keywords |
| Biofloc, Aquaculture, Sustainable Development |
| Status: Abstract Accepted (Poster Presentation) |