HAMBURG: At a red-brick factory in the German port city of Hamburg, cocoa bean shells go in one end, and out the other comes an amazing black powder with the potential to counter climate change. The substance, dubbed biochar, is produced by heating the cocoa husks in an oxygen-free room to 600 degrees Cels
HAMBURG: At a red-brick factory in the German port city of Hamburg, cocoa bean shells go in one end, and out the other comes an amazing black powder with the potential to counter climate change.
While the biochar industry is still in its infancy, the technology offers a novel way to remove carbon from the Earth's atmosphere, experts say. The biochar traps the CO2 contained in the husks - in a process that could be used for any other plant. Biochar was already used by indigenous populations in the Americas as a fertiliser before being rediscovered in the 20th century by scientists researching extremely fecund soils in the Amazon basin.
"To ensure the system stores more carbon than it produces, everything needs to be done locally, with little or no transport. Otherwise it makes no sense," Houben said. To make better use of the powerful black powder, Houben said other applications would need to be found. The construction sector, for example, could use biochar in the production of"green" concrete.
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