چکیده (انگلیسی):

The experiments were conducted to measure the important parameters in quality of treatment by addition of four different amounts of nano two metal oxides 1, 1.5, 2 and 2.5 gr. The value of zeta potential and oil and grease is investigated. The results show the better performance of nano ferric oxide in coagulation and flocculation by lower amount of zeta potential, ammonia, phenol and sulfide and oil, grease elimination than aluminum oxide. However the value of slug volume index in treated wastewater by nano ferric oxide is higher than that is obtained with nano aluminum oxide. The obtained results show the higher values of zeta potential in about 1%, 3%, 11% and 5% using aluminum oxide than those are obtained using nano ferric oxide show the better coagulation and flocculation in using nano ferric oxide nano coagulant.