Live food aquaculture training course

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Different technologies for producing Algae

• Batch and continuous production methods

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Main culture systems

• Batch culture
• 300 or 500 litre sacs
• D-ended tanks
• Continuous culture
• Connected sac system (SeaSalter)
• Tubular fence (BioFence)
• Tubular spiral (AddaVita)
• heterotrophic production (Aqua Fauna)

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Batch Culture

• Indoors Greenhouse

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Tank culture

• Advantages - large volumes
• Disadvantages - weak culture, prone to
  contamination
• Small tanks large tanks

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SeaSalter SystemContinuous Algal Production,
Systems, SeaCAPS

• Adapted batch culture technique
• Plastic Sacs connected together
• dosing pump water and nutrient supply
• overflow into common collector

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SeaSalter SeaCAPSwater supply
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SeaSalter SeaCAPSalgae collection
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SeaSalter SeaCAPS

• Equipment required

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SeaSalter SeaCAPS

• Water pasteurised before distribution
• Nutrients and carbon dioxide are metered in
  continuously
• All pipework is designed to be steam sterilised
  weekly
• They can be installed
• indoors,
• in greenhouses (with or without supplementary
  lighting
• outdoors under shade

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SeaSalter SeaCAPS

• Each 500 litre bag will yield 80-120 litres of
  algae per day.
• The expected production of a 40-bag unit would be
  4-5 cubic metres per day of quality algae.
• Cell density is dependent on light availability
  and required flow rates
• draws less than 3kW of power excluding lights

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SeaSalter SeaCAPS

• Requires about 2 man-days per week are enough to
  run a 40-bag installation and take care of stock
  and starter cultures
• 500 Litre polythene bags are run for an average
  of four months and discarded before collapsing
• A typical greenhouse-type installation with
  artificial illumination can attain a cell density
  of 4000 cells/microlitre.

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SeaSalter SeaCAPS
MaxMar Mariscos, Laguna Manuela in Baja
California with a 12 bag layflat system to
support their hatchery to grow C. gigas and
scallops.
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SeaSalter SeaCAPS

• lay flat bag systems outdoors which operate with
  no artificial light.

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SeaSalter SeaCAPS

• Norway
• Scalpro AS produce scallops and oysters at Rong,
  near Bergen. Their upright system built into an
  old fish processing plant has been working since
  1996

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Tubular reactors

• BioFence
• Addavita
• Why do we change from batch to continuous high
  density production?

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Theory

• In a tank or algal bag system, the zone of
  penetration is low. Once the cells move away from
  that surface then light cannot penetrate and
  photosynthesis ceases. However, this dark area
  allows more complex protein building to occur
  within the algae. Due to sacs diameter the ratio
  of light to dark area is small and so algal
  growth is limited.

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Transparent tubes, self-cleaning

• Very tough, very clear food grade plastic tubes. 
• They are self cleaning thanks to patented special
  cleaning beads that continuously circulate with
  the algae. This enables the system to be run for
  extended periods without culture crashes or
  cleaning.

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Space saving and reliable

• Space saving - The tubes can be mounted
  vertically in a fence like arrangement or
  horizontally on the ground or at an angle on a
  roof. They take up a lot less room than other
  growing methods and of course, they are growing
  far more concentrated algae so even less space is
  required.
• Reliable -Can operate for long periods before
  crashing, consistent quality of product.
• Efficient - save on labour costs

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Ready prepared nutrients
There are two major sources of error in growing
algae preparation and contamination ready made
nutrients with complete formulation in sterile,
concentrated liquid form 
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BioFence

• Clear pipe fence reactor

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BioFence
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BioFence Production
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BioFence Production
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BioFence Greenhouse
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BioFence indoors
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AddaVita

• Clear pipe spiral reactor

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AddaVita reactor
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AddaVita outdoors and indoors
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AddaVita controls
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Heterotrophic production
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Boa photobioreactor
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Prism photobioreactor
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Tubular photobioreactor
Schematic Diagram of Tubular Photobioreactor
Height 1.5m
Diameter 30 cm
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Tubular photobioreactor