MODEL MATEMATIKA PENYISIHAN SUBSTRAT DALAM REAKTOR UPFLOW HIBRID ANAEROBIK YANG MENGOLAH AIR BUANGAN MENJADI ORGANIK TINGGI

• Main Author: Dwi Astuti, Ariani
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/72551
• Institution: Institut Teknologi Bandung

Anaerobic process that combining suspended and attached growth in a system is known as Hybrid Reactor. In this reactor. the fixed bed were placed above the suspended reactor. Mathematical modelling on plug flow condition is presented describing substrate utilization. and based on mass balance of microorganism and substrate. Model tested is done by using research data. Research use diluted molasses as synthetic wastewater, representing wastewater with high organic concentration. Concentration of COD influent were adjusted ± 40, 60•, 90 gr/L and hydraulic detention time were varied at 24, 30, 48, 72 hours. The result of research showed that the best condition was obtained on concentration of COD influent 38980 mg/L, hydraulic detention time 30 hours, rate of organic loading 15,073 kg COD/m3.day. Kinetic parameters obtained was µm suspended growth and attached growth reactor : 1,1059/d and 1,4936/d, suspended growth and attached growth reactor : 0,8038/d and 1,8216/d, y suspended growth and attached growth reactor : 0,214674 clan 0,02991 mg VSS/mg COD, Ks suspended growth and attached growth reactor: 1076,22 dan 9081 mg/L, Km suspended growth and attached growth reactor : 8245 clan 64741 mg/L. Simulation results showed that rate of substrate removal depend on hydraulic detention time and VSS initial. The model predicted the dynamic behavior of experimental data reasonably well with a mean deviation of 25% for concentration of COD influent ± 40, 60 gr/L and 57,5% for concentration of COD influent ± 90 gr/L. The high deviation for concentration of COD influent ± 98 gr/L showed that there is. influence of concentration of COD influent (model using Monod Kinetics so there is no influence of concentration of COD influent). Besides the model do not predict the attachment and detachment process of biofilm.