#TITLE_ALTERNATIVE#

• Main Author: OKTIAWAN (NIM 25398040), WIHARYANTO
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17556
• Institution: Institut Teknologi Bandung

Sequencing Batch Reactor (SBR) is a cyclic reactor designed based on some processing stages (fill, react, settle, decant/draw, and idle); all of which are carried out in one reactor that eventually gives some advantages. There would be no need, then, to use clarifier and this process itself is also flexible. The currently existing SBR are developed out of activated sludge process and are mainly operated in both aerob and combination of anaerob and aerob system. Meanwhile, the pure anaerob system is still rarely being used. For the sake of this research, SBR was operated in anaerob system which separated acodogenesis phase from metanogenesis in high artificial organic made from glucose. Biomass used was mixed cultur taken from well-operated anaerob bioreactor.<p>The result of operating anaerob SBR during acidogenesis phase on various substrate concentrations as well as on time ratio of fill against reaction (f/r); showed that time ratio during fill/react was an important process variable that influenced separating efficiency; in this case each operation had different optimum fill/react ratio. 10,000 mg/1 COD would be optimum at the ratio f/r of 2:2 hour/hour; 30,000 mg/1 COD would be optimum at the ratio f/r of 2:4 hour/hour; meanwhile for 60,000 mg/1 and 80,000 mg/1 COD would be optimum at the ratio f/r of 2:8 hour/hour. The above process was still in in acidogenesis stage with adequate COD decreasing degree of 40%-50%. Most of organic substrate were transformed into volatile acids (3,500-5,000 mg/1 TAV) which would increase as the operating process ran. During SBR on various feed of concentrations, methane was relatively not yet created.<p>During fill period, there had been substrat's degradation by biomass. It was proved on kinetics analysis that showed the rate of k separation at the rate of 0.34-3.15 hour and yield factor was between 0.03-0.08 g VSS/g COD. The k result showed that the price would decrease as the rate burden increased. This degradation would continue on reaction period at the rate of substrat's usage (q) of 0.32-1.82 hour. During this period, there was a tendency that the longer batch time and the higher concentration; the lower the substrat's usage rate would be. Meanwhile, the growth rate of biomass was at the rate of 0.026-0.163 hour' with the same tendency as in substrat's usage rate occurred. From, both reaction period rates above, death Rate (Kd) could be gained = 0.0058 hour and Y = 0.0942 g VSS/g COD. The highest forming rate of TAV product was gained at 30,000 mg/l with the ratio f/r of 2:8 hour/hour as much as 201.38 mg TAV/l hour. <br />