الفهرس 
INTRODUCTION AND OBJECTIVESOnly 14 pages are availabe for public view
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Abstract
Treatment plants in Egypt are suffering different problems including overloading and need for extension and/or upgrading, incompliance with environmental regulations and standards, lack of optimization and proper control, and the need for a tool to assess performance and adopt control actions to improve plant efficiency. The energy and resources utilization crises, therefore, compel us to make the most efficient use possible of our human and material resources associated with wastewater treatment. In fact we believe that automation and automatic control of wastewater treatment processes will ultimately become a necessity. Secondary treatment is the most important step in treating wastewater. It is characterized by the use of biological methods to remove the organic material present in the wastewater. The activated sludge process developed in the early years of the twenty century at the University of Manchester is still the most popular and efficient secondary treatment method adopted by engineers until now and the basic principle of the activated sludge process has not changed since the first application. Mathematical modelling is an attempt to translate the conceptual understanding of a real-world system into mathematical terms. A model is a valuable tool for testing our understanding of how a system works and also a perfect way to connect different processes to each other to evaluate their relative impacts in the overall performance of this system. The objective of this study has been mainly directed to develop a dynamic model for the activated sludge process, relying on COD measurement in determining the organic matters concentration for successive application in Egypt. The utilization of the model in investigating process control strategies and process optimization is the consequent objective of this work.