An abrasive liquid contains substances, often minerals or inorganic substances, that are harder than the material they rub against. This abrasion will wear out and damage softer materials.
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.
The function of an air cooler is similar to that of an evaporator. What makes it different is the type of cooling medium it uses. An air cooler is a heat exchanger used to cool and/or dehumidify the air.
An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.
A heating system in a building can be based on radiators, convectors, floor heating, air heating or a combination of these. Using air heating is a fast but expensive way to heat up a building.
The airlift pump – also called mammoth pump – exploits the increase of the oxygen intake in water under pressure. At the same time, rising air is used to lift – and therefore circulate – water. This makes the mammoth pump suitable for aerating and circulating large volumes of water. An airlift pump is often used in situations where maintenance needs to be kept to an absolute minimum.
To prevent corrosion and problems with operation, heating and air-conditioning systems must be constructed so that air can be removed both when the system is filled and during subsequent operation.
Pure aluminium is a light, soft metal with a density of about one third of that of steel. Pure aluminium has a high electrical and thermal conductivity.
“Ambient conditions” are a set of parameters used by designers for dimensioning ventilation and cooling systems. Ambient conditions typically include temperature, humidity and air pressure.
Anaerobic conditions under wastewater transport and treatment imply that neither nitrate, sulphate nor oxygen are present for the decomposition of organic matter.
