Wastewater glossary
Terms explained with numbers from the facility database.
Wastewater Treatment Plant
Treated sewage sludge
Plate-and-frame and belt filter presses for sludge dewatering
Fats, oils and grease
Flow equalization basin
Liquid separated from sludge in a centrifuge
Ozone disinfection and oxidation
Suspended-growth biological treatment
Ring-shaped extended-aeration activated sludge reactor
Sludge stabilisation with biogas recovery
National Pollutant Discharge Elimination System
Publicly Owned Treatment Works
Million gallons per day
Sewage pumping station in a collection system
I&I: clean water entering sanitary sewers
Mechanical removal of water from sewage sludge
BNR: nitrogen and phosphorus removal by bacteria
Advanced treatment after the secondary biological stage
SIU: an industry regulated under a treatment plant’s pretreatment programme