1. Department of Applied Biosciences and Process Technology, Anhalt University, Bernburger Str. 55, D-06366 Koethen/Anh., Germany. Tel.: +49(0)3496 67 2313, Fax: +49(0)3496 67 2642, E-mail: h.bergmann@emw.hs-anhalt.de; johanna.rollin@bwp.hs-anhalt.de
2. Department of Environmental Engineering, Anadolu University Eskisehir, Eskisehir, Turkey. Tel.: +90(0)222 3350580 ext 6406, Fax: +90(0)222 3239501, E-mail: askopara@anadolu.edu.tr