DECOLORIZATION OF VAT VIOLET 1 DYE FROM TEXTILE INDUSTRIAL WASTE WATER USING BIOFILM OF FUNGAL AND BACTERIAL CONSORTIUM

Abstract

The increasing of textile industries creates a critical need for a proper treatment plan to control and minimize possibilities of contaminants and toxic compounds being released to the environment. One of such approach that is often being researched is the utilization of biofilm for treating industrial waste, and among those is about the use of fungal and bacterial consortium. This research was conducted to examine and acquire a more stable biofilm formed by prime fungal and bacterial consortium for the decolorization process in textile wastewater treatment. Isolates were selected by examining their decolorization capability, antagonistic interaction, and mixed culture formation (consortium). The selection continued with biofilm forming in material plastic LLDPE (Linear Low Density Polyethylene). Superior consortium from bacteria and fungi in form of biofilm in material plastic LLDPE then applied for Vat Violet 1 dye from textile industrial waste water. The selection resulted in two superior fungal isolates coded as strain JYGC1 and K2; and three bacterial isolates coded as strain ATA6, PK29, and PK65. These isolates were then combined to form biofilm on the surface of a plastic material and examined for their applicability to decolorize wastewater containing Vat Violet 1 on varied pH condition of 5, 7, and 8. Biofilm of regular thickness was formed by the fungal bacterial consortium and capable of increasing the rate of decolorization activity. Biomass yield before and after application to the wastewater is highest on pH 7, at 0.66 g and 0.45 g. The thickness and biomass corresponds with decolorization activity, which is also highest on pH 7, with deviation of 1.155 between before and after application; much higher than that of without biofilm application at 0.714.