Consideration of the quality parameters required for purification plant discharges

Abstract

On the basis of the relations linking the different chemical parameters of the treated wastewater a discussion is produced in the view of laying down the local discharge consent standards. The key parameters (BOD, ammonificable nitrogen...) to determine the others are proposed. It is discussed that some of the quality parameters (COD...) should not be uselessly fixed at stringent values. The best qualities that the present processes (entended aeration AS, BAFS; sand infiltration) without expensive complementary stages can produce an established. Some other considerations try to turn richer the discussion.