Stuart,
Why bundle and stash terrestrial straw. Growing straw requires substantial fresh water and nutrients. You could bundle and stash algae instead. How about sargassum or kelp? A macro-algae can be bundled in large mesh "tea bags" with much of the water being squeezed out during the bundling process.
Then, as long as you've got bundles of biomass, why not separate the nutrients from the carbon before you stash the carbon? That way, you can recycle the nutrients back to the ocean surface for growing more biomass. High-pressure anaerobic digestion will release the carbon in two separate streams; one gaseous CH4, one dissolved CO2, which easily converts to liquid CO2 at typical ocean temperatures and pressures.
Would you or others be interested in a California Energy Commission grant to run a few bench experiments on high-pressure anaerobic digestion? I can send a draft abstract.
Mark E. Capron, PE
Oxnard, California
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