Dyneema In Aquaculture


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Dyneema® in Aquaculture

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Dyneema In Aquaculture

  1. 1. Nets that provide a safer place to grow How Dyneema® fibers can help you grow and protect your business
  2. 2. Content • Trust your business – and your future – to the world’s strongest fiber • Nets that reduce the percentage of escapes • Improved cage performance for healthier growth • Nets that cut the cost of doing business • A different fiber for new challenges • Background about the fiber • DSM and DSM Dyneema • Our value proposition
  3. 3. Trust your business – and your future – to the world’s strongest fiber
  4. 4. The world’s strongest fiber Dyneema® fiber is: – 15 times stronger than steel – 4 to 5 times stronger than polyamide – Lighter than water – Extremely durable So it can: – Stop bullets – Pull oil tankers – Serve as orthopedic suture
  5. 5. History in Commercial Fishing • Dyneema® has been in use in commercial fishing applications for many years such as trawl nets and many rope applications • In aquaculture, many nets made with Dyneema® have been in the water globally for many years • In Hawaii one fish farmer is already using the same net since 1998, and is currently expanding • In the Mediterranean, Dyneema® has become the standard material for bity fish such as sea bream • In the Nordic, cod farming seems only possible with nets made of Dyneema® fiber, since the use of other materials can lead to significant fish escapes (up to 40%)
  6. 6. Approach to aquaculture • We have a dedicated, experienced team • We know the industry • We collaborate with key – hi tech players • We have developed a System Cost Analysis tool to help you determine your benefits • We provide technical support by means of our own technical facilities as well as by collaborating with international institutes and organizations
  7. 7. Nets that reduce the percentage of escapes
  8. 8. Very tough exceptional bite resistance • Dyneema® fibers can resist almost any attack by biting fish • With regular nylon nets, fish escapes up to 40% have been reported ! • Imagine 40% of your fish are lost after 9 months growth.... • Extreme bite resistance is illustrated by the popularity among cod and sea bream farmers; fish well-known for their bites • Some fish farmers feel confident enough to lower diving inspections • Some insurance companies lower their premiums for cod farmers, when they use nets made with Dyneema® • Bite resistance is illustrated by the fact that Dyneema® fibers are also used in cut resistance gloves
  9. 9. Escapes: a simple calculation • 90 meter circular cage, 15 meters deep • volume: 10000 m3 • fish (mt): 200.000 kg (at 20 kg/m3) • value (4 $/kg): 800.000 $ • Imagine losing only 10%, representing 80.000 $...
  10. 10. Improved cage performance for healthier growth
  11. 11. Healthier fish environment • The strength of the Dyneema® fibers, enables much smaller twines compared to traditional materials – for equal strength • Smaller twines, mean less surface for fouling to grow on • Smaller twines also increase water flow through the cage, improving the water exchange and available oxygen • Smaller twines mean better shape stability of the nets, therefore less stressed fish, and thus better growth and lower mortalities • Imagine, harvesting only 2% more fish... • ...this would be about >16.000 $...in one cage...
  12. 12. Simulations of cage behavior • Simulations comparing nets made with nylon and Dyneema® fiber, were performed by Aquastructures AS (Norway, www.aquastructures.no) • Set up: – net breaking force of 95 kg – 45 mm full mesh – 90 meter circumference and square steel cages – weights: 35 kg/m • Simulations to compare: – strain on the mooring/cage system – tensions in the netting – shape stability of the netting
  13. 13. Residual cage volume at 0.3 m/s Dyneema® Polyamide 95% residual volume 82% residual volume
  14. 14. Residual cage volume at 0.7 m/s Dyneema® Polyamide 54% residual volume 34% residual volume
  15. 15. Summary of residual volumes Water Current (m/s) Dyneema® Polyamide 0.3 95 82 0.5 74 52 0.7 54 34
  16. 16. Forces in the cages 35 Newton 85 Newton Dyneema® Polyamide • Conclusion: • Forces on the cage system are higher with nets made from nylon fiber, therefore it is likely that fatigue occurs sooner
  17. 17. Nets that cut the cost of doing business
  18. 18. Save on maintenance • Experience from trawling shows up to 3 times longer lifetime than other materials • Dyneema® fibers outperform other materials with respect to: – abrasion resistance – tension fatigue – UV resistance • Service life of netting expected to be significantly longer than traditional materials
  19. 19. Weight of the netting • Dyneema® fibers are 4 to 5 times stronger than nylon • This creates several options for the fish farmer: – Much lighter for equal strength, weights can be as low as 35% of the weight, for equal size – A much larger net for equal weight – A much stronger net for equal weight • In addition, Dyneema® does not absorb water and does not shrink • Less weight also means less antifouling usage • Less weight increases safety during handling
  20. 20. Many opportunities • The Dyneema® fiber properties, provide many opportunities for reducing operational cost • Benefits taken into acount: – less fish escapes – reduced antifouling cost – reduced maintenance cost – reduced diving inspections – increased fish health – lower insurance premiums • Together with the fish farmers, we determine the benefits nets made of Dyneema® can bring you • System cost analysis tool: Operating cost are taking into acount versus initial investment
  21. 21. System cost analysis tool ex am ple
  22. 22. A different fiber for new challenges
  23. 23. New industry challenges • Moving to exposed sites and offshore locations – Dyneema® fibers are very well suited for fish farming in exposed sites • Bigger is better...and easier – Dyneema® fibers allow you to install larger cages, without the need for additional handling equipment • Endless opportunities with a long history of reliability, turning properties into profitabilities for the end user
  24. 24. Putting Dyneema® to the test • DSM Dyneema is constantly looking for new applications and improvements of the current product portfolio • Please get in touch with your challenge ! DSM Dyneema Mauritslaan 49, Urmond PO Box 1163, 6160 BD Geleen The Netherlands www.dyneema.com www.commercialfishing.dyneema.com e-mail: cminfo.dyneema@dsm.com
  25. 25. Background about the fiber
  26. 26. The World’s Strongest Fiber Free breaking length (km) Dyneema® 400 Aramid 235 Carbon fiber 195 Glass 135 Polyester/nylon 85 Steel 25
  27. 27. Chemical resistance • Dyneema® fibers are not affected by sea water • Nylon looses up to 15% of its strength and can become stiff during use in wet applications • Dyneema® fibers are resistant to most common chemicals such as acids and bases as well as organics
  28. 28. Our value proposition
  29. 29. Values beyond strength • Dyneema®, the world’s strongest fiber, provides many benefits and opportunities for the fish farming industry • Containment nets made with Dyneema® will help reduce your maintenance cost, and provide a safer and healthier environment for the fish to grow • Predator nets made with Dyneema® will provide increased bite resistance and increased safety against predators • Nets made with Dyneema® fibers, help you be prepared for future challenges • We work together with customer and fish farmers to provide the best solution for their specific situation
  30. 30. Disclaimer This presentation is intended to give general information only on the characteristics of Dyneema® products. Purchases of Dyneema® products should be made only after a thorough assessment of particular needs and suitability of a particular Dyneema® product with the assistance of a professional. Dyneema® products are sold only under contracts containing specific product specifications Dyneema® is a registered trademark of Royal DSM N.V.
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