The general objective of this work is to evaluate the efficiency of the wastewater management system of the Yaound? University Hospital Center (C.H.U).Tests were conducted from December 2012 to March 2013 at the scale of a pilot plant built at the former wastewater treatment plant of the University of Yaound? I CHU now abandoned in order to study the treatment efficiency of two natural wastewater treatment systems in series consisting of a planted...