الفهرس 
INTRODUCTION AND OBJECTIVEOnly 14 pages are availabe for public view
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Abstract
The aim of this study was to investigate the efficiency of using activated sludge (AS) in comparison with extended aeration (EA), to discuss the effects of phenol concentration on the both systems and to investigate the effect of adding activated carbon media on the performance of these systems. In this work, these systems are operated for pharmaceutical wastewater treatment. Synthetic feed samples were employed in this work. The synthetic feed composition is 1500 mg/l for COD. Laboratory units of activated sludge and extended aeration pilot plants were operated at steady state condition. The experimental work was divided into five scenarios, first scenario was Activated sludge system and the second scenario was extended aeration system, each scenario consist five phases according to the Phenol concentrations in the aeration tank. Comparisons between these systems in addition to an overall comparison between the five phases are to be investigated. The second part of this research focuses on modelling and simulation of activated sludge and extended aeration using General Purpose Simulator (GPS-X) to investigate the plant performance among three scenarios, first scenario was used different COD concentrations, the second scenario was change influent flow rate and the third scenario was shock loading in flow rate for one day and two day in both systems. The modelling results showed that extended aeration system was much better than activated sludge system under all cases of operation, and increase the flow rate in activated sludge increases the effluent COD but not effect in extended aeration. The experimental results indicated that the extended aeration system give higher removal efficiency than activated sludge system for COD, phenol and ammonia. Adding activated carbon suspended growth of just (1 gm/l) of the working reactor volume in both systems (AS, EA) is improving the removal efficiency.