Package plants are pre-manufactured treatment facilities used to treat wastewater in small communities or on individual properties. The most common types of package plants are extended aeration plants, sequencing batch reactors, oxidation ditches, contact stabilization plants, rotating biological contactors, and physical/chemical processes. This fact sheet focuses on the first three, all of which are biological aeration processes.
EPA (2000): Wastewater Technology Fact Sheet - Package Plants. Washington D.C.: United States Environmental Protection Agency (EPA) URL [Accessed: 06.09.2012]