http://www.youtube.com/v/GTLKoGGo0dM&list=PLnPs1H9gHJFZb5o-q3zX3ff2kgut_ZkL8?rel=0
[Accessed: 14.05.2014]
This video explains how to perform an activated sludge mixed liquor suspended solids settling test using a settlometer. This allows computing the settling abilities of the wastewater.