SULFIDE REMOVAL FROM SPENT CAUSTIC USING ADVANCED OXIDATION PROCESS METHOD BASED ON UV, OZON AND HIDROGEN PEROXIDE

• Main Author: Putri Nirwandhani, Amalia
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/68893
• Institution: Institut Teknologi Bandung

Spent caustic is a wastewater that comes from crude oil processing and contains high level of sulfide, merkaptan, and COD. This waste is a by-product of the sweetening process, which is a process that aims to reduce the sulfur content in crude oil so that it can produce products such as gasoline, kerosene, with better quality. Spent caustic has a pungent smell, can threaten human health and industrial production processes, especially pipelines because of the sulfide content in it. Moreover, high level of COD could disrupt the aquatic environment. Therefore, treatment is needed to remove most of the pollutants. Advanced oxidation process (AOP) is a processing method that is often used to treat spent caustic. In this research, UV, Ozon (O3), and Hydrogen Peroxide (H2O2) and their combination will be used to achieve the best treatment of spent caustic. Advanced oxidation process or AOP is a wastewater treatment technology that has the principle of utilizing hydroxyl radicals (HO•). Hydroxyl radicals are highly reactive compounds, so hydroxyl radicals will react with several types of organic compounds to produce simpler compounds. Hydroxyl radicals can be generated by combining two or more oxidizing agents and by adding a catalyst to the oxidizing agent. In this study, AOP experiments will be carried out with a combination of UV, O3, UV/O3, H2O2, H2O2/ O3, dan UV/ H2O2/ O3. The efficiency for sulfide removal are 12,7% (UV), 98,99% (O3), 99,8% (UV/O3), 99,9% (H2O2), dan 100% (H2O2/ O3 dan UV/H2O2/ O3). In the other hand, the COD removal efficiency that can be achieved are 11,5% (UV), 62% (O3), 65% (UV/O3), 84,3% (H2O2), dan 85,7% (H2O2/ O3), dan 86,2% (UV/H2O2/ O3).