A suspension of water and solid waste, transported by sewers to be disposed of or processed. / (obsolete) sewerage.

plural of sewage

Sewage that has not yet been processed or treated to separate and remove contaminants.

An industrial structure used in the treatment of sewage

plural of sewage plant

A filamentous colony of bacteria (e.g. Sphaerotilus natans) and fungi (e.g. Fusarium aqueductum), protozoa and other species, which may be found adhered on surfaces in sewage treatment plants or in natural waters as a result of the discharge of incompletely treated waste water.