Aquaculture is important towards the accomplishment of the Sustainable Development Goals, especially goal 14 and rural economic development in developing countries, but today aquaculture still has many unsustainable factors both in water use and organic waste. Biofloc (aggregation of microorganisms) technology is a potential aquaculture system which could make the industry more economic viable and more sustainable. In biofloc technology the reared species is together with microbes in the same water body and the toxic nitrogen species (NH4+) is converted into microbial protein. This gives both better growth performance and feed utilization, but also less water use. However, there are some problems in biofloc technology when the reared species and the microbes both has their own biological preferences towards feed, water parameters and water turbulence. These problems limit the production of the system. In Bio-RAS (term created by A. Kiessling and S. Zimmermann (RAS means Recirculating aquaculture system)) approach the water body is separate between the reared species and the microbes, therefore both organisms can be handled towards their own biological preferences. In this study Bio-RAS approach is tested and compared towards traditionally biofloc technology, where the Bio-RAS results was significant better in both growth performance and feed utilization. The conclusion is that Bio-RAS may be the future “tree branch” for the technology to follow for both economical and sustainability reasons
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:oru-86269 |
| Date | January 2020 |
| Creators | Djurstedt, Mattias |
| Publisher | Örebro universitet, Institutionen för naturvetenskap och teknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0018 seconds