New Internationalist

Oysters help clean ocean

April 1999
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JAQUELINE DELIA/RUSH / CAMERA PRESS
JAQUELINE DELIA/RUSH / CAMERA PRESS

Oyster shells are to clean up waste water in Oshima, Japan. ‘Oyster shells harbour large numbers of anaerobic and aerobic microbes on their surfaces. Dirty water is food for these microbes,’ explains Toyokuni Asahina, one of the designers of the wastewater plant. Around 250 tonnes of shells will be used annually to form layers in filtration tanks where the oyster-shell microbes can feast on kitchen, bath and laundry water from 265 households.

New Scientist Vol 161 No 2169

Front cover of New Internationalist magazine, issue 311 This column was published in the April 1999 issue of New Internationalist. To read more, buy this issue or subscribe.

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