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Aquaculture practices applied to micro-algae cultivation

Aquaculture practices applied to micro-algae cultivation. Kevin Fitzsimmons, Ph,D . Soil, Water, and Environmental Sciences 2 June 2010. Algae Aquaculture. Algae represent the largest aquaculture crop on global basis Algae are a major component of diet in Asia and Pacific cuisine

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Aquaculture practices applied to micro-algae cultivation

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  1. Aquaculture practices applied to micro-algae cultivation Kevin Fitzsimmons, Ph,D.Soil, Water, and Environmental Sciences 2 June 2010

  2. Algae Aquaculture • Algae represent the largest aquaculture crop on global basis • Algae are a major component of diet in Asia and Pacific cuisine • Algae are a growing sector for niche markets in the US

  3. Aquaculture producers know how to manage algae • Fish, shrimp, and bivalve farmers deal with algae blooms on daily basis • They are experts on water management and removing small living things from water • They have large amounts of nutrient rich water and facilities for holding water • Algae by-products are valuable feed ingredients

  4. UA algae farming- Moloka’i

  5. Shrimp/fish and edible seaweeds

  6. Gracilaria being washed in cage

  7. Data report - Daily growth rates of Gracilaria with shrimp effluent over 4 weeks % growth per day

  8. Demonstration ponds stocked with Gracilaria & Eucheuma as part of aquaculture restoration post-tsunami KAB. ACEH PIDIE (5.073) Ha KAB. BIREUN(6.710) Ha Aceh Besar KAB. ACEH BESAR (3.450) Ha

  9. Initial stocks from Ohama corporate farm (1000 kg) brought to Sumatra Fresh material Material loaded from farm Gracilaria distributed into ponds

  10. Workshops andtraining • Field visits to farmers

  11. Shrimp - fish - seaweeds Fish cage effluents (feed and feces) fertilize seaweed

  12. Fresh Gracilaria from the shrimp pond

  13. PLANTING OF SEAWEED (EucheumaSEED

  14. GROWOUT OF EucheumaSEAWEED

  15. SEAWEED IS READY FOR HARVEST

  16. SEAWEED HARVESTING

  17. Results

  18. Seaweed, milkfish and shrimp polyculture

  19. Saudi Arabia project Integrated fish and shrimp effluent to fertilize algae

  20. Lab culture of micro and macro algae Bioreactor and raceway production

  21. Off to the next workshop ………

  22. Micro-algae aquaculture • Commonly used for larval fish, shrimp, and bivalves • Some for human consumption • Spirulina, Super blue-green algae, etc. • Most US microalgae culture is in the Western Region (California, Oregon, Washington)

  23. Blue-greens or Cyanophytes • Most commonly farmed cyanobacteria is Spirulina • Spirulina was collected naturally from Lake Texcoco by the Aztec and by natives around Lake Chad in central Africa • Spirulina has now become a major product in the health food market, farms in California

  24. Micro-algae culture with China Academy of Sciences, Beijing

  25. Harvesting • Rotating screen filters • Water passes through, how much algae can be caught in:60 µm screen?20 µm screen? 5 µm screen?

  26. Integrated Pest Management • First ARID trials • Diatoms first fouling organisms • Grazing protozoan second organism • Need to develop IPM plan similar to those developed for hydroponics and field crops

  27. By-product uses • Aquaculture feeds • Sources of beta-carotene, astaxanthin, canthaxanthin, and other carotenoids

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