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File:Trickling filter bed 2 w.JPG

English: Sewage treatment trickling filter bed using plastic media – small rural treatment plant at Beddgelert sewage treatment works, Gwynedd, Wales, UK.
Date 11 January 2005
Source Own work (taken by user Velela with a Pentax Optio555 digital camera. 1/50sec @ f2.8)
English: Transferred from : 2005-01-16 21:23 . . Velela . . 1296x972 (680941 bytes)
Author Velela
( Reusing this file)
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