ملف:Sludge.jpg21:27 Mattisse 1981×3000× (1722952 bytes) {{Information |Description = Sludge [http://www.fws.gov/digitalmedia/cdm4/item_viewer.php
ملف:Activated Sludge 1.svg{{Information |Description={{en|This is an upgraded version of [[:en:Aerated Sludge 1.jpg]] which was uploaded by [[:en:User:Kekel|Kekel]] on July 4, 2006. The
ملف:Activated Sludge 1.png[[Aerated Sludge 1.jpg]] which was uploaded by [[User:Kekel|Kekel]] on July 4, 2006. The reasons for upgrading the image are: (1) To convert the lossy jpg (which
ملف:Markfield sludge tanks.jpgdescription page was here. All following user names refer to en.wikipedia. 2004-09-19 17:27 Salimfadhley 800×600× (113009 bytes) Markfield Sludge Tanks English