BIOFILM FORMATION MODELING ON POLYETHYLENE TEREPHTALATE (PET), POLYPROPYLENE (PP), AND POLYVINYL CHLORIDE (PVC) AS SUPPORTING MEDIA WITH ANOXIC AND AEROBIC CONDITIONS

• Main Author: Zafira, Nesa
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/67479
• Institution: Institut Teknologi Bandung

Every activity that uses clean water affects the quantity of wastewater, especially domestic wastewater. In biological processes, organic compounds in wastewater will be utilized by microorganisms as a food supply and converted into simpler and less harmful compounds such as water, carbon dioxide, and biomass. One of the biological wastewater treatments is attached growth culture where microorganisms attach and develop on the surface of the media. Supporting media plays an important role in biological wastewater treatment. In this study, the supporting media taken from previous studies will be modeled with a monod model and contois model to determine the formation of biofilm attachment on a variety of media, namely PET, PVC, and PP. The highest kinetics of biofilm growth using PET media was found in the monod model equation under aerobic conditions with µmax and Ks values 0,2635/day and 798,8165 mg/L, respectively. Meanwhile, for anoxic condition, the values of µmax and Ks were 0,1220/day and 653,8649 mg/L, respectively. Based on the calculation with the coefficient of determination R2, it was found that the highest µmaks value in anoxic conditions was PET media with R2 of 0,9694 and in aerobic conditions was PVC media with R2 of 0,9212. Apart from from coefficient of determination, the best media was also viewed from the water contact angle The difference in the kinetics values of the monod model on the three media indicated that the type of supporting media affected the growth of biofilm bacteria where the best growth under anoxic and aerob conditions was on PET media. Based on Matlab simulation, obtained substrate removal with PET media in anoxic conditions from the initial substrate of 1924 mg/L to 148,73 mg/L and under aerobic conditions to 176,64 mg/L.