Passive and active chilled beams are used for cooling building air. Passive chilled beams cool the inside air without the noise and expense of ductwork and air handler units. Active chilled beams generally have much higher sensible cooling capacities than passive chilled beams.
Chlorination is probably the most common method of treating microorganisms in water. This method is mainly used by water utility companies in order to kill microorganisms in water right from the water production site up to the consumers water tap.
A chiller is a component that is used to cool water. The cooled water is pumped from the chiller to a water/air or water/water heat exchanger, where it can be used to cool air or water respectively.
Water disinfection with chlorine dioxide is a very efficient and gentle way of fighting legionella bacteria and all kinds of micro organisms in water such as viruses, parasites and fungus spores.
A cleaning pig is designed to facilitate the removal of sediments in a drain or sewer. It is formed as a cylindrical device with shallow channels on the surface and is propelled through the pipe by the flow.
COD (Chemical Oxygen Demand)
Chemical oxygen demand is a measure of the total quantity of oxygen required to oxidize all organic material (biologically available, inert organic matter) into carbon dioxide and water, and oxidisable inorganic matter.