the agglomeration of finely divided suspended matter by the addition to the liquid of an appropriate chemical coagulant, by biological processes or by other means.
1. being or composed of matter other than plant, animal or mineral. 2. being, containing, or relating to, a chemical substance not usually classed as organic. 3. artificial.
a genus of aerobic gram-negative, rod- shaped bacteria that forms acid and gas on many carbohydrates and that include forms normally present in the human and various other vertebrate intestines which are pathogenic and indicative of fecal contamination when found in water and other forms which typically occur in soil and water.
1. a filter casting off a thin film of scum or bacterial growth or fungus. 2. the phenomenon associated with trickling filters and contact aerators, where slime and solids accumulated in the media are discharged with the effluent.
a mineral consisting of sodium-aluminum fluoride. Used for soldering copper and alloys when mixed with phosphoric acid. Also used for soldering aluminum bronze when mixed with barium chloride.
1. water which is suitable for drinking, culinary, and personal purposes. 2. water free from impurities present in amounts sufficient to cause disease or harmful physiological effects. 3. water from any source which has been approved for human consumption by the health agency having jurisdiction.
treated wastewater now suitable for a direct beneficial or controlled use. It is not safe for human consumption. May also be known as “grey water”.