You searched for: “sewage”
sewage (s) (noun), sewages (pl)
Human and domestic waste matter from buildings: Sewage is transported away from homes through a system of sewers.
This entry is located in the following unit: -age (page 3)
sewage, sewerage
sewage (SOO ij) (noun)
The refuse, liquid, and solid waste, carried off in sewers or drains: "It's important that municipalities make sure that the sewage is properly carried away from homes and other buildings in the systems of pipes which have been set up for that purpose."
sewerage (SOO uhr ij) (noun)
Either the removal of sewage or the system of removal: "The city official explained that sewerage refers to the removal of waste materials by means of the sewer system."

The new sewerage system was designed to remove the sewage more efficiently than the previous sewerage system.

This entry is located in the following unit: Confusing Words Clarified: Group S; Homonyms, Homophones, Homographs, Synonyms, Polysemes, etc. + (page 4)
Toilets: Then and Now, Part 12: Sewage Treatment Plants with Vegetation
(using plants; such as, algae to clean up waste water)