PEMANFAATAN SELULOSA BAKTERIAL NATA DE COCO SEBAGAI ADSORBEN LIMBAH BATIK
Chintia Veronika, Prof. Ir. Hary Sulistro, S.U., Ph.D., IPU.; Prof. Ir. Muslikhin Hidayat, S.T., M.T., Ph.D., IPU.
2024 | Tesis | S2 Teknik Kimia
Wastewater is an inevitable pollutant generated by both large and small-scale batik industries, posing potential environmental imbalances. The high presence of organic substances, such as COD (Chemical Oxygen Demand) and BOD (Biological Oxygen Demand), in batik wastewater can lead to environmental pollution. This study aims to evaluate the potential of bacterial cellulose in solid waste from nata de coco as an adsorbent for batik wastewater and assess the performance of nata de coco adsorbent in reducing COD and BOD levels in industrial batik wastewater. Additionally, the study aims to determine adsorption isotherm and kinetics models representing the adsorption process.
The research involves varying the adsorbent mass (0.25, 0.5, 0.75, and 1 gram), contact time (20, 40, 60, 80, 100, and 120 minutes), and temperature (25°C, 30°C, and 40°C) applied to 50 mL of batik wastewater. A simple reflux apparatus is used for laboratory-scale experimentation, with COD values determined using a reflux apparatus and BOD concentrations measured using a DO meter after incubation. Based on the adsorption process, the highest COD removal efficiency achieved is 90.18%, reducing the COD concentration in batik wastewater by 10,100 mg/L. Moreover, it reduces the BOD concentration by 5028.75 mg/L, equivalent to a 73.21% reduction from the initial concentration. The adsorption mechanism follows the Freundlich Isotherm model, and the kinetics model adheres to pseudo-second-order kinetics.
Kata Kunci : adsorbsi, Isotherm, BOD, COD, nata de coco, kinetika, limbah batik