kasseiodeidesu
1. Activated sludge.
Noun
#253872
1. Activated sludge.
1. activity
2. active
1. stimulation (e.g. of an economy); revitalization (e.g. of a town)
2. activation
1. reactive oxygen (i.e. free radicals, which can be destructive at high concentrations)
1. surfactant
1. sludge; slime
2. hopeless situation; hell
1. activated carbon; activated charcoal
1. inactivation
1. inert; noble
2. inactive
1. biologically active substance