Definitions for "PRELIMINARY TREATMENT"
Simplest treatment that waste water can have. It can involve screening to remove rags and other similar large solids and/or maceration to reduce the size of solids. It can also involve grit removal.
(1) The conditioning of a waste at its source before discharge into a sewer system, to remove or to neutralize substances injurious to sewers and subsequent treatment process or to effect a partial reduction in load on the treatment process. (2) Unit operations at a wastewater treatment plant, such as screening, comminution and grit removal, that prepare the wastewater for subsequent major treatment.
The treatment of wastewater by means of screens, macerators or comminuters and grit separators.