ANALYSIS POTENTIAL OF ELECTRICITY GENERATION USING TOFU WASTEWATER WITH MICROBIAL FUEL CELL TECHNOLOGY

• Main Author: Widyani Aghnia, Dini
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/46220
• Institution: Institut Teknologi Bandung

The increasing of population growth has an implication for energy needs and the increasing of waste produces. Until now, 68% Indonesia’s energy was come from non-renewable energy which are limited and dangerous for the environmental and organism.Therefore study related to renewable energy is needed which can be from air, wind, sun, biomass and the others. However, on the other hand organic rich food waste produced annualy, especially those from home industry like tofu industry. The waste from those industry stil thrown away directly to the river which are dangerous for environmental and health. The technology that can solve both problem simultaneosly is Microbial Fuel Cell (MFC). MFC is a technology that utilizes biomass from waste using microorganisms as biocatalysts to extract the energy stored in organic or inorganic compounds that are easily degraded into electrical energy. In this study the potential of electricity generated using tofu waste will be reviewed with the aim to determine the performance of MFC as a waste water treatment technology and electrical energy simultaneously and the effects towards operational conditions that is external resistance with a batch system (1000, 800, 600, 400, 200, 100, 50 and 20 ?) and changes in the organic loading rate (OLR) with a continuous system (10, 15, 20, 25 and 30 kg/m3 days). Preliminary research was carried out using two types of reactors, namely MFC single chamber MFC (R1) and MFC membrane-less single chamber(R2). Both of them were used graphite fiber brush as an anode and carbon cloth as cathoda with a surface area 25 cm2 and volume reactor was 62.5 ml. The electrical energy potential parameters measured in this research are voltage (volt), current density (CD), power density (PD), coulomb efficiency (CE) and energy recovery (EC) while wastewater treatment parameters measured is organic removal efficiency. Based on the results R2 has a better energy performance compared to R1 because produces a greater voltage which is 0.568 volts. Further research was carried out using R2 and tofu wastewater as a substrate with a concentration 1000 mg / l. The results of this study shows that mebrane-less single chambe MFC have a electrical energy potential 0,000203 mW / COD removed and the power density 80.62 mW/m2 in batch conditions with an external resistor of 1000 ?. Subsequent research was conducted to determine optimal operational conditions in external resistance and OLR. Based on the results of the study showed that the optimal external resistance is 100 ohms and have significant effect to the voltage, power density, current density, coulomb efficiency except for the organic removal efficiency with values for each parameter respectively are 0.209 volts, 0.834 A / m2, 174,167 mW / m2, 57% and 92%. Whereas variations with various OLRs show that optimal condition occurs at OLR 10 kg/m3 day with voltages, current densities, power densities, CE and EC were 0.2 volts, 0.8 A / m2, 156.8 mW / m2, 14.76% and 6.2 mWh / gCOD removed.