Page 19 - SIMPLIFIED WASTEWATER TREATMENT FUNDAMENTALS \ Advanced Activated Sludge P1

Selecting the Ideal Species

Moving even further along the timeline to what would be considered

older biomass (high SRT), Rotifers are found.

Rotifers are Metazoa and should never be the dominate species.

Rotifers are complex organisms which take longer to mature. Rotifers

consume a lot of organic particles from the wastewater and are fast,

independent swimmers.

They indicate a medium to low F/M ratio. Other Metazoa include

Nematodes and Waterbears.