Assertion: anaerobic digestion | /r/ObjectUse | used in process
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: Anaerobic digestion is frequently used in the treatment of municipal wastewaters, often in a process that also includes aerobic digestion (digestion in the presence of oxygen) and sedimentation.
text: Anaerobic digestion is used as part of the process to treat biodegradable waste and sewage sludge.