Anaerobic means "living, active, occurring, or existing in the absence of free oxygen", as opposed to aerobic which means "living, active, or occurring only in the presence of oxygen." Anaerobic may also refer to: * Anaerobic adhesive, a bonding agent that does not cure in the presence of air *

Anaerobic respiration Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O2). Although oxygen is not the final electron acceptor, the process still uses a respiratory electron transport chain. In aerobic organisms undergoing re ...

, respiration in the absence of oxygen, using some other molecule as the final electron acceptor **

Anaerobic organism An anaerobic organism or anaerobe is any organism that does not require molecular oxygen for growth. It may react negatively or even die if free oxygen is present. In contrast, an aerobic organism (aerobe) is an organism that requires an oxygenate ...

, any organism whose redox metabolism does not depend on free oxygen **

Anammox Anammox, an abbreviation for anaerobic ammonium oxidation, is a globally important microbial process of the nitrogen cycle that takes place in many natural environments. The bacteria mediating this process were identified in 1999, and were a grea ...

, anaerobic ammonium oxidation, a globally important microbial process of the nitrogen cycle ** Anaerobic filter, an anaerobic digester with a tank containing a filter medium where anaerobic microbes can establish themselves **

Anaerobic digestion Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste or to produce fuels. Much of the ferm ...

, the use of anaerobic bacteria to break down waste, with biogas as a byproduct *** Anaerobic clarigester, an anaerobic digester that treats dilute biodegradable feedstocks and allows different retention times for solids and liquids *** Anaerobic contact process, an anaerobic digester with a set of reactors in series *

Hypoxia (environmental) Hypoxia refers to low oxygen conditions. Normally, 20.9% of the gas in the atmosphere is oxygen. The partial pressure of oxygen in the atmosphere is 20.9% of the total barometric pressure. In water, oxygen levels are much lower, approximately 7 p ...

(anaerobic environment), an environment with little or no available oxygen * Anaerobic lagoon, used to dispose of animal waste, particularly that of cows and pigs *

Anaerobic exercise Anaerobic exercise is a type of exercise that breaks down glucose in the body without using oxygen; ''anaerobic'' means "without oxygen". In practical terms, this means that anaerobic exercise is more intense, but shorter in duration than aerobi ...

, exercise intense enough to cause lactate to form, used in non-endurance sports

See also