Marine biomass (macroalgae) cultivation

Marine biomass (macroalgae) cultivation

Storing CO2 into organic matter


Macroalgae species (also known as kelp or seaweed) are fast growing primary producers that usually thrive in the shallow waters of coastal areas due to the abundance of both light and nutrients. Because of their efficiency, these algae can store large amounts of carbon into organic matter.  


Macroalgae can be farmed in coastal areas but also on appositely built platforms in the open ocean. The biomass produced can be either used as a source for energy production with carbon capture (BECCS), transformed into relatively stable forms (e.g. biochar) or sunk into the deep ocean where, after natural decomposition, carbon remains stored for thousands of years.