Ahmed Salah Eldin Ibrahiem Mohammed Ellzayat <br/><br/>
Comparative study on activated sludge biological treatment systems in some Arab cities /  
 دراسة مقارنة على انظمة المعالجة البيولوجية بالحمأ المنشطة فى بعض المدن العربية 
Ahmed Salah Eldin Ibrahiem Mohammed Ellzayat ; Supervised Ezzat Abd El shafi Hasanien 
 - Cairo :   Ahmed Salah Eldin Ibrahiem Mohammed Ellzayat ,   2003 
 - 227P :   charts ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Civil Engineering 
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<br/><br/><label>Subjects--Index Terms: </label>activa ted sludge Arab cities Biological treatment