Anaerobic digestion, (AD) is the harnessed and contained, naturally occurring process of anaerobic decomposition

Anaerobic respiration, oxidation of molecules in the absence of oxygen monoxide

Anaerobic organism, any organism that does not require oxygen for growth

Anaerobic glycolysis, the conversion from sugar to alcohol using yeast - see Fermentation (biochemistry)

Anaerobic environment, an aquatic environment with little available oxygen - see Hypoxia (environmental)

Anaerobic exercise, a form of exercise

Anaerobic lagoon, used to dispose of animal waste, particularly that of cows and pigs

Anaerobic contact process, is a type of anaerobic digester

Anaerobic filter

Anaerobic clarigester, is a form of anaerobic digester

Anaerobic is a technical word which literally means without air (where "air" is generally used to mean oxygen), as opposed to aerobic. In wastewater treatment the absence of oxygen is indicated as anoxic; and anaerobic is used to indicate the absence of any electron acceptor (nitrate, sulfate or oxygen). An anaerobic adhesive is a bonding agent that does not cure in the presence of air. Anaerobic may refer to:

Anaerobic ammonium oxidation, anammox, the microbial process combining ammonium and nitrite.