#TITLE_ALTERNATIVE#

• Main Author: RIZKI APRILIAWATI (NIM : 15312085)
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30579
• Institution: Institut Teknologi Bandung

<p align="justify"> Textile wastewater contains dye and long chains inorganic salts which are difficult to be degraded, so that it can harm the environment. Some cases say that several recalcitrant compounds still remaining in the wastewater after going through the conventional technologies such as the dye. This then led an idea of advanced processing technologies. AOP with ozone-UV combination is one of the technologies that can be applied to remove the dye content. UV radiation will accelerate the decomposition of ozone in water into hydroxyl radicals. This research studied about the factors that affect AOP including ozone dosage, UV rays intensity, and the pH at decolorization various Reactive Black 5 concentrations (10 ppm, 40 ppm, and 200 ppm). Optimum efficiency is achieved at 85.21 ppm/min ozone dosage with the addition of UV rays which reached 100% dye removal efficiency for 30 minutes at a concentration of 10 ppm, 120 minutes at a concentration of 40 ppm, and 360 minutes at a concentration of 200 ppm; COD removal efficiencies of 14.29%, 60%, and 30.95%; as well as a decrease in the pH reached 0.42. While the reaction rate constant reached 0.2108 at a concentration of 10 ppm, 0.0389 at a concentration of 40 ppm, and 0.0161 at a concentration of 200 ppm. The trial of continuous systems caused a drop in the efficiency for ± 9.3%. Degradation assay of PT. X textile wastewater performed using the optimum variation selected and reached 29.7% decreased in COD; 83.3% decreased in total phenol; 49.7% decreased in total chromium; 13% decreased in total ammonia; dye removal efficiency of 63.7% and a pH decrease up to 0.14. While the BOD, TSS and oil and grease parameters were increased. The addition of UV rays was not successful to increase the removal efficiency significantly.<p align="justify">