Aran H-Kittikun, Sopha Chantaphaso, and Poonsuk Prasertsan

pp. 807 - 819

Abstract

Decolorization of palm oil mill effluent pretreated by enzyme from Aspergillus niger ATCC 6275 was
investigated. The culture filtrate after separation of suspended solids was used for decolorization by biological, chemical and physical methods. Results indicated that the chemical method (using coagulant) was more
effective than the biological method (using commercial peroxidase, two strains of white-rot fungi Phanerochaete
chrysosporium and Coriolus versicolor) and physical method (using activated carbon, pararubber seed and
sand filter). Studies on the effect of coagulant concentrations on decolorization revealed that using the combination of 10 ml/l polyferric sulphate and 10 g/l calcium oxide gave the highest color removal of 84.5% and
organic matter (in term of chemical oxygen demand, COD) removal of 86.5%.