Development of design criteria for highly efficient biological treatment of textile wastewater

Mass balances and kinetic parameters for nitrification are essential tools for a rational design of aerobic biological treatment systems. These were d etermined in lab scale investigations and applied on representative assessm ent cases for mid- and long-term variations of nitrogen. Thus, with the hel p of dynamic simulation, criteria for the design of highly efficient biolog ical treatment of textile wastewater were developed, which were also evalua ted in economic considerations. Combined treatment of textile and domestic wastewater has shown to be advantageous, because it provides a constant bas ic nitrogen load. Furthermore, the choice of a sufficiently high sludge age is recommended to reach a reliable treatment system and a simple operation . (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved.