Sådan bruger vi alger

Transcription

Sådan bruger vi alger
Seaweed in Denmark
What is seaweed?
What do we use it for?
How do we produce it?
Why do we eat it?
Tasters 
Annette Bruhn
Research Scientist, Aarhus University
Research areas:
• Cultivation of seaweed
• Seaweed composition
• Seaweed as a biofilter
• Seaweed for food, feed, energy
and high value products
• Seaweed as environmental
indicator
Co-founder of AlgaeCenter
Denmark in 2010
AARHUS
UNIVERSITET
What is seaweed?
• Sea grass and algae
Algae
• Photosyntesis
• No roots
• No tissue for strength or
transportation
• Spores – not seeds
• Single cells or
multicellular
Algae - from microscopic to gigantic
Fro 1/1000 mm to 60 m
Microalgae
Maroalgae (seaweed)
4
Basis for all life in
the ocean
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Food
Oxygen
Habitat
Coastal protection
Algae – great diversity
Prokaryotes
Eukaryotes
Algae – great diversity
Algae – great diversity
Algae – great diversity
Algae with glass shells
Algae with calcium shells
Algae with armour plates
Algae with eyes!
Algae, that light up!
Living near the poles
15
Living in the tropics
Living on land
Living in the abyss
Living in the surf
19
Seaweed in Danish waters
• 422 species
– 156 red algae
– 128 brown algae
– 110 green algae
– 28 others
(+ 6 marine plants – such as sea grass)
Nielsen et al, 1995
Salinity
Oxygen
Algae produce 50% of the oxygen in
the atmosphere
Oil
Oil is partly made from algae under
high temperature and high pressure
Chalk
Moler
Food
Stabilisers – E400-E407
Food colorants
Health - Nutraceuticals
Omega-3 oils
Minerals
Vitamins
Bioactives
Bioactives
Plant growth
Anti-fouling
Medical
Seaweed as a future bioresource
Biorefinery
<1% bioactives
3% colorants
3% oil
15% protein
20% ash/minerals
60% carbohydrates
Value
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Bioactives
Ingredients
Feed/protein
Energy
The marine environment
Biofilter – from nitrogen to protein
Circular nutrient flow between land and sea
Global production of seaweed
Cultivated
Harvested
FAO, 2012
Production
23 mio tons
5,9 mia US $
>99% in Asia
How to cultivate kelp?
Sugarkelp (Saccharina latissima)
On land
At sea
How to cultivate kelp?
• Reb – stofstrimler –
presseninger
How does it look from the surface?
How does it look under water?
• Hanging reef
• Attracting
marine life
• Increasing
biodiversity
• Taking up
nutrients
• Taking up CO2
Seaweed cultivation in Denmark
• Hjarnø Havbrug – 100 hq
• Seaweed Societé – 80 ha
• Danish Shellfish Centre, DTU-Aqua
– 4 ha
• Algaecenter Denmark (20 ha)
• Price ca 45.000 DKR per hektar
• Production ca 10 ton per hektar
Seaweed cultivation in Denmark
Hjarnø Havbrug
in Horsens Fjord
100 hectares
with seaweed
Largest in Europa
Primarily sold for
food
Compensation crop
• Rainbow trout
• Blue mussels
• Sugar kelp
Particulate Organic
Matter
Dissolved
Inorganic nutrients
Challenge in DK and Europe
Biomass
1 Dowle
& Barton, 2011.
Increase
value
Increase yioed
lower costs
• Gap between costs of production and income (energy) ~ factor 10
• European saleries are too high
• Sales price of energy is low
Product
Product
Product
Pretreatment
Processing
Product
Increase yield – reduce costs
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Selective breeding
Optimising technology
Scaling up
Off-shore
Robust systems
Increase mechanisation
Decrease handling
Increase value
Biorefinery
<1% bioactives
3% colorants
3% oil
15% protein
20% ash/minerals
60% carbohydrates
Value
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Bioactives
Ingredients
Feed/protein
Energy
Seaweed research in Denmark
• Cultivation technology
• Selective Breeding
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Genetics
Selection of ecotypes
Increase of yield
Increase of protein
content
• Biorefinery
• Bioactives
Research at Aarhus University
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Cultivation technology
Selective Breeding
Scaling up
Industry cooperation
Algae Center Denmark
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Research
Industrial cooperation
Dissemination
Technological, Institute,
Kattegatcenteret, AU-BIOS
AARHUS
UNIVERSITET
Large projects
• Innovation foundation
• EU H2020
• ERA-NET
Facilities:
• Landbased cultivation
• Off-shore cultivation 20 ha
• International conference
Seaweed products in Denmark
Nordisk Tang
Started with small
project with AU
Nordisk Tang 2015-2016
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Pestos
Spices
Mustards
Baking mix
Oil
Snacks
Snaps 
Reciepe book
….
From 1 to 8 employed
International market
expansion: China,
Germany, Italy..
Caviart – Jens Møller products
• Artificial caviar
• Seaweed based –
alginate shells
• Many flavours
Fermentationexperts
• Fermentation of
landbased crops and
seaweed
• Substitute for
antibiotics in pig
production
• Sold now in Bilka!
Why do we eat seaweed?
• Healthy
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Minerals
Vitamins
Omega 3
Bioactives
Fibres
• Tasty
– Umami
– Interesting texture
Bladderwrack salad
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A handfull of fresh bladderwrack
Boiling water
Lemon/lime
Salt
Sesame seeds
Chili or other spices
Cut the tips of the bladderwrack
Pour boiling water (color changes from brown to green)
Pour cold water
Dry the bladderwrack
Add lemon, salt, sesame seeds and spices 
Bon appetit!
AARHUS
UNIVERSITET
- and now for the tasters 
[email protected]
AARHUS
UNIVERSITET