a facility designed to receive the wastewater from domestic sources and to remove materials that damage water quality and threaten public health and safety when discharged into receiving streams or bodies of water. The substances removed are classified into four basic areas: [1] greases and fats; [2] solids from human waste and other sources; [3] dissolved pollutants from human waste and decomposition products; and [4] dangerous microorganisms. Most facilities employ a combination of mechanical removal steps and bacterial decomposition to achieve the desired results. Chlorine is often added to discharges from the plants to reduce the danger of spreading disease by the release of pathogenic bacteria.
municipal or domestic treatment facilities where sewage undergoes a process to remove or alter its original bacterial content
(STP); the place where sewage is treated, and many of the solids and nutrients removed before the left-over liquid is discharged into the waterways
The items of equipment or structures which treat the sewage.
a facility for treating wastes disposed of through drains and sewers. Depending on its sophistication, a sewage treatment plant may provide as many levels of treatment. Primary treatment involves the settling and removal of solids only. Secondary treatment involves aerating the wastes to encourage the growth of micro-organisms that convert organic matter into carbon dioxide and sludge. Tertiary treatment removes certain dissolved chemicals as well as additional solids. Most sewage treatment plants in Canada provide either primary or primary and secondary treatment.
A system that treats (which can include recycling and reclamation) municipal sewage or industrial wastes of a liquid nature. Large facilities are generally owned and operated by local governments.
The site of convergence and treatment for household, commercial and industrial sewage via the sewerage system. Sewage is treated at an STP to either primary, secondary, or tertiary level before being discharged as effluent to receiving waters.