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Agressive farming of seaweed which has multiple benfits and uses
To feed the growing plants that are planted against rafts that float in the phototropic zone one can use deep oceanic water that has all the nutrients.
1. It captures carbon
2. It provides oils and proteins and vitamins
3. It provides food for ocean life
4. It provides fertilizer for farms
5. It reduces oceanic acidity
6. It can fund itself
7. It can expand into infinity, possibly halting the increase in greenhouse gasses
8. It can be turned into bioethanol
The Offshore Ring
From Techno-Economic Feasibility Analysis of Offshore Seaweed Farming for Bioenergy and Biobased Products
"If methods were perfected to farm seaweeds on 1% of the world’s 361 million km2 of ocean surface
area (Sverdrup et al., 1942), at production levels already achieved in large-scale coastal seaweed
farms in China [average yield approaching 10 metric ton of dry biomass per hectare per year,
(Chen, 2006), 3.5 billion metric ton dry weight of new biomass derived from seaweeds would be
produced annually. This could be processed into biofuels, animal feeds, industrial
polysaccharides, fertilizers and other co-products and would exceed by several-fold what is
projected to be available for biofuels from terrestrial biomass resources. The future cost of
production of energy from seaweeds is projected to be equivalent to that of energy crops like
sorghum and poplar (Chynoweth et al., 2001). Thus, overall, the potential for seaweeds
compares very favorably with terrestrial sources."
Capacity
Around Korea the seaweed Grateloupia anceolata is found to absorb 155 microgram of CO2 per 1 square meter per second. This amounts to 1435 tons per annum per square mile at a productivity of 50%.
Study of offshore biomass
Offshore mariculture
Offshore ring for farming
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