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Abrasive liquids
An abrasive liquid contains substances, often minerals or inorganic substances, that are harder than the material they rub against.
Adaptation
Whilst mitigation means working to reduce greenhouse gases, adaption contrasts by focussing the efforts on trying to control the environmental damage instead of trying to reduce it.
Aerobic
In wastewater transport and treatment aerobic means that oxygen is available and that it can be used as an oxidation agent in the degradation of organic matter.
Air cooler
The function of an air cooler is similar to that of an evaporator. What makes it diff. is the type of cooling medium it uses.
Airlift pump
The airlift pump – also called mammoth pump – exploits the increase of the oxygen intake in water under pressure.
Ambient condition
“Ambient conditions” is a set of parameters used by designers for dimensioning ventilation and cooling systems.
Anaerobic
Anaerobic conditions under wastewater transport and treatment imply that neither nitrate, sulphate nor oxygen are present for the decomposition of organic matter.
Anoxic
Anoxic conditions, as for anaerobic conditions, indicate the absence of pure oxygen. However, compounds such as nitrate or sulphate can be present under anoxic conditions.
ATEX
ATEX is an abbreviation of a French term used to denote an explosive atmosphere.