Removal of Color, Phenol and Sulfide from Batik Wastewater using Immobilized Bacillus licheniformis in Bentonite Mineral

Abstract Batik is one of Indonesia’s original cultural heritages. In Indonesia, the batik industry largest home-based textile industry. This consumes a large amount water. Due to unavailability wastewater treatment plant, most producers dispose directly into river, resulting in extensive water pollution. Some pollutants, such as color, phenol, and sulfide, have potential pollute environment. Wastewater needed improve quality meet specific safety requirements after treatment. Among physical chemical methods, biological has advantages being more economical environmentally friendly. this study, using immobilized Bacillus lincheniformis on bentonite mineral was investigated. The concentration sulfide mini plant (WWTP) measured before (influent) (effluent) daily parameter. results showed that highest phenol removal efficiency value reached 100%, overall effluent met Indonesian standard. However, some concentrations did not standard, even though 93%. color decolorization at 68%. Those indicate consortium minerals microorganisms from waste can be used promising method treat wastewater.