P.E. notion

Based on many measures, the population equivalent is a theoretical notion that expresses the pollutant load of an effluent per inhabitant and per day, whatever the origin of the pollution.

A PE corresponds to the average daily release of 180l of effluent presenting a load of 90g of SS, 60g of BOD5, 135g of COD, 9.9g of total nitrogen and 2g of total phosphorus.