tilapia pilot project: biofloc technology · • the biofloc is a unique ecosystem of rich and...
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Division of Aquaculture
Department of Animal Sciences
TILAPIA PILOT PROJECT: BIOFLOC TECHNOLOGY
Henk Stander [email protected]
Picture: Dr Michelle Burford
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Contents:
1) What is biofloc?
2) How does biofloc technology work?
3) What are the benefits?
4) Who is STORVIK Biofloc AS?
5) The history of this project
6) Project rationale
7) Pilot project design
8) Project site
9) Timelines
10) Markets
11) Challenges
12) Research and publications
13) Lessons learned
14) Conclusion
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1. What is biofloc?
• Bioflocs are conglomerates of microbes, algae, protozoa and
others, together with detritus, and dead organic particles.
• The biofloc is a unique ecosystem of rich and potent particles
suspended in relatively poor water.
• Bioflocs found in ponds are porous, light and have a diameter of
0.1 mm to a few mm.
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2. How does biofloc technology work?
• Biofloc technology developed as a consequence of the development
of permanently mixed and aerated ponds, systems resembling bio-
technological plants and maximizing the potential of microbial
processes.
• Biofloc systems spread as a consequence of the restriction of water
exchange due to costs and environmental regulation and as a means
to provide bio secure systems to minimize disease, especially viral
disease of shrimp.
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3. What are the benefits?
Advantages:
• Increased food and nitrogen conversion.
• Reduced water consumption, waste production and treatment.
• Simplification and cost reduction of facility design.
• Improved environmental control and pathogen biosecurity.
Disadvantages:
• Conditioning time for system start up (couple of weeks).
• Oxygen consumption of biofloc.
• Energy requirements for maintaining biofloc in suspension.
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4. Who is STORVIK Biofloc AS?
• STORVIK Biofloc AS is a subsidiary company of STORVIK Holdings
• The main company goes back to 1913 when Nils Storvik built a small
smithy that he operated in addition to his farm
• Storvik Holdings is today a leading mechanical and engineering
company
• Head office in Sunndalsøra
• Approximately 85 employees
• Storvik well-established in Czech Republic, Russia, Spain and Iceland
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STORVIK Biofloc AS
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AkvaVision – Biomass estimator
VitaDiTM
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5. The history of this project:
9 LOI signed 7/03/2011 Stellenbosch Research contract signed 1/09/2011 Oslo
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6. Project rationale:
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7. Pilot project design:
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8. Project site:
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US Mariendahl Experimental Farm, 15 km outside Stellenbosch towards Paarl
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9. Timelines:
Introduction March 2011
Scoping June 2011
Authorization April 2016
Construction January 2017
Completion June 2017
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Process approximately 7.5 years!
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10. Markets:
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11. Challenges:
1. Project Funding
2. Local Climate Conditions
3. Cheap Imports
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11. Challenges – Climate:
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Latitude:
30°S
1 000 m3
TAASA
± 250 ton
tilapia per
annum in
SA
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11. Challenges – Imports:
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Chicken:
R24.50 – R124.99/kg
Hake:
R44.95 – R168.99/kg
Tilapia:
R29.99 – R159.99/kg
Quality makes the difference!
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12. Research and publications:
18 Aquaculture International (2016) 24: 1309-1322AASA Conference 2015
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13. Lessons learned:
• These kind of collaborations takes time, much more than
was anticipated
• If funding was in place from day 1, the process could have
run much smoother
• You need continuity of staff to drive a project to the end
• Perseverance, persistence, determination, grit, motivation
are all key words
• Good working relationships, confidence and trust in one
another are all important characteristics
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14. Conclusion:
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