Abstract
Pre-treatment for wastewater in industry were utilizing activated carbon are gradually recognized by the world. Hence, the objective of this study is to determine the performance of chemically activated carbon prepared from bamboo in removing Chemical Oxygen Demand (COD) from wastewater collected from fish cracker industry. The effects of initial concentration (10 % - 50 %), carbon dosage (0.1 g - 1.0 g), and contact time (3 h - 12 h) were examined. The adsorption experimental design was performed using the standard Response Surface Methodology design which was Box-Benhken design via Design-Expert software (version 7.0 Stat Ease, trial version). By increasing carbon dosage and lower initial concentration, the removal efficiency increased. According to Box-Benhken results, the activated carbon with zinc chloride activation was fitted to a quadratic equation and statistically significant. The R2 for the model was 0.9780 and the adjusted R2 was 0.9498. The optimum conditions suggested by the model for the process variable were 49.27 mg/l, 9.49 hours and 0.932 g for initial concentration, contact time and carbon dosage, respectively. The maximum removal obtained at these conditions was 70.579%.
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