Original Article | 2001, Vol.23 Supplementary : Oil Palm, pp.807-819
Comparison on decolorization of palm oil mill effluent by biological, chemical and physical methods
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%.
