DEKOLORISASI ZAT WARNA AZO MENGGUNAKAN ADVANCED OXIDATION PROCESS BERBASIS OZON

The textile industry in its manufacturing process requires large amounts of water where approximately 70% of the process water will turn into wastewater. Textile industrial wastewater is known to contain color compounds which are difficult to degrade, which can cause aesthetic value problems in air receiving bodies, are biohazardous and contain toxic and carcinogenic materials that can harm the health of humans and other living things. Most of the textile industries in the Bandung area discharge their wastewater into the Upper Citarum River containing dyes in the form of azo dyes. One of the advanced wastewater treatment technologies for color removal is the Advanced Oxidation Process (AOP) with ozone (O3) which is capable of decolorizing textile wastewater. The ozonation process was carried out in a reactor with a volume of 16 L in batches on Reactive Black 5 (RB5), Reactive Yellow (RY), and Reactive Blue (RB) dyes with various concentrations of 5 mg/L, 10 mg/L, 15 mg/L respectively and variations in ozone doses of 7.44 mg/minute and 22.32 mg/minute. Decolorization of RB5, RY, and RB at various concentrations of 5 mg/L and 10 mg/L reached 100% at an ozone dose of 22.32 mg/minute. Decolorization at various color concentrations of 15 mg/L with variations in ozone doses of 22.32 mg/minute for RB5 was 99.77% while RY and RB reached 100%. The measured low dissolved ozone concentration results indicate that ozone has reacted and oxidized the organic compounds contained in the wastewater. The highest organic compounds removal was obtained in reactor with variation in ozone doses of 22.32 mg/minute, which reached 100%. The best results of the azo dye decolorization experiment were RB>RY>RB5, respectively.