Ozonation Treatment Of Industrial Tofu Wastewater Lintang Daniswara, Ahmad M Fuadi, Anisa Ur Rahmah
Muhammadiyah University of Surakarta, Jl.A.Yani Tromol Pos 1 Pabelan Kartasura, Surakarta
Abstract
Food industries generally produce wastewater with high organic content, which could be identified by the high chemical oxygen demand (COD) and biological oxygen demand (BOD) values. This study treated liquid wastewater from the tofu industry using advanced oxidation processes, the O3/H2O2 system. The system chosen was based on its capability to achieve a high level of COD and BOD reduction in the treated wastewater, whereas the hydroxyl radical generated would be the primary oxidant to degrade the organic content inside. This study aims to find the efficiency of reducing BOD, COD, and Total Suspended Solid (TSS) levels with variations in H2O2, pH, and ozonation time. The system was capable of reducing BOD, COD, and TSS with maximum values of 96%, 93%, and 90%, respectively. This efficiency percentage shows a dynamic molecular interaction between organic compounds in liquid waste of tofu industri and peroxide acid. Because in the process of ozonation, there is the formation of free radicals OH- from a series of oxygen decomposition reactions. The use of peroxide promoter (H2O2) for the ozonation oxidation reaction becomes more effective.
