| http://www.w3.org/ns/prov#value | - In principle, phosphate could be recycled from one batch of algae to the next, but how exactly this might be done remains a matter of some deliberation, e.g. the algae could be dried and burned30, and the phosphate extracted from the resulting ???ash???, or the algae could be converted to methane in a biodigester31,32, releasing phosphate and other nutrients in the process.
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