WASTE-WATER TREATMENT AT THE PETROLEUM REFINERY, KIRIKKALE, TURKEY USING SOME COAGULANTS AND TURKISH CLAYS AS COAGULANT AIDS

In this study, waste water of Kirikkale Refinery (Turkey) was treated with coagulants (alum, ferric chloride, ferrous sulfate and lime) and coagulant aids (polyelectrolytes: anionic, cationic, nonionic) and som e Turkish clays namely Samas, Canbensan, Ceylan, Hasandede and Keskin in order to see their effects in clarifying the waste water before bio purification. The results showed that local clays (Hasandede and Keski n) are as efficient as bentonites (Samas, Canbensan and Ceylan). The c larifying efficiency of clays in combination with coagulants shows alm ost the same results of about 90%. The effect of coagulants, FeCl3, Fe SO4 and CaO, was similar to that obtained with Al-2(SO4)(3) The effici ency of polymeric materials especially cationic and anionic polymers w as found to be better than that obtained with clays. (C) 1998 Elsevier Science Ltd. All rights reserved.