| Summary: | In this research, the decrease of COD level of herb-pharmaceutical industrial wastewater by photofenton method was studied. The herb-pharmaceutical industrial wastewater was taken from PT. Air Mancur, Surakarta. The COD level of herb-pharmaceutical industrial wastewater was determined by titrimetric method. Identification of organic matter as contributor of COD was performed by Fourier Transform Infra Red (FTIR), X-Ray Diffraction (XRD) and UV-Vis spectrophotometric. Photofenton process was conducted by batch system in a closed reactor that was completed by UV lamp. In this process, the influence of concentration of Fe2+ and H2O2, irradiation time and solution pH on the photofenton effectiveness were evaluated.
The results showed that COD level of herb-pharmaceutical industrial wastewater was 1960 mg/L with cellulose and lignin as COD level contributor. The photofenton effectiveness test showed that photofenton process could decrease COD level up to 248 mg/L at the optimum conditions i.e Fe2+ and H2O2 concentration were 2 mM and 200 mM respectively, pH 3 and the UV irradiation time of 12 hours. The decrease of COD level of herb-pharmaceutical industrial wastewater can reach 30 mg/L, fulfill the standard quality (maximum 120 mg/L), by twice photofenton processes.
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