DYNAMIC SIMULATION FOR UPGRADING OF WASTE-WATER TREATMENT PLANTS - ANASSESSMENT OF TREATMENT-PLANT PERFORMANCE WITH REGARD TO THE EC-DIRECTIVE CONCERNING URBAN WASTE-WATER TREATMENT

This paper shows how the dynamic simulation of municipal wastewater tr eatment plants can be used for assessing the performance of a plant un der different legal requirements. In this study, the situation is desc ribed, when it was uncertain, how the requirements of the German law ( ARA-V 1991) would be adapted to the requirements given by the EC-direc tive concerning urban wastewater treatment (EC directive, 1991). The r equirements of these two are compared to each other. A simulation stud y is described, in which the future results of a plant to be extended are calculated for the period of one year. It is shown that, concernin g the effluent concentrations of ammonia and total nitrogen, this plan t will be able to meet both laws. (C) 1998 LAWQ. Published by Elsevier Science Ltd.