The Effect of Immersion Time on Decolorization of Textile Wastewater Using Marasmius sp. in Modified Packed Bed Bioreactors

摘要

Textile industry produces wastewater that requires specific treatment because of its color composition. The objective of this research is to evaluate the performance of the culture used in degrading indigo dyes. The variable of this research was the immersion time between the fungus culture and dyes (15 minute and 30 minute) with 6 hours between each immersion; and the variety of dyes (indigo carmine and indigo bromine). The research was carried out using an Indonesian white rot fungi, Marasmius sp. immobilized in luffa as a growth support. It was found that a significant decolorization occurred after four days of the process. The dye decolorization in 15 minute immersion processes gave a more stable result than those of 30 minute ones. The laccase assay showed a maximum activity of 44.17 U/L for treating indigo carmine and 14.71 U/L for indigo bromine, however no correlation was observed between the laccase activity and the decrease of color intensity. Marasmius sp. decolorized indigo carmine dyes better than that of indigo bromine. Overall, this study shows a promising result for treating of textile wastewater in a modified packed bed bioreactor using Marasmius sp.