[Residue Treatment Center (or CTRV) in Vacarisses, designed by Batlle i Roig. While the CTRV is a municipal solid waste treatment facility, not a wastewater treatment facility (where flushed feces usually go), the two kinds of facilities are commonly linked by the need to dispose of solid materials separated out of water at wastewater treatment facilities.
Photographs by Francisco Urrutia via Quaderns #262 “Parainfrastructures”, where you can read more about the project.]