Assertion: bacteria's cell | /r/HasProperty | mentioned for free-living protozoa
Facets:
value: in activated-sludge systems
type: LOCATION
Source sentences:
text: This is 5 x 105 to 107 per liter, which seems comparable to the "3–20 × 106 cells l–1" mentioned above for free-living protozoa in activated-sludge systems.