THE POTENTIAL OF MICROBIAL FUEL CELL BIOELECTRICITY GENERATION IN DOMESTIC WASTEWATER TREATMENT WITH MODIFIED SEPTIC TANK REACTOR
The treatment of domestic wastewater using Modified Septic Tanks (MST) with an anoxic-aerobic process employing a Moving Bed Biofilm Reactor (MBBR) with the addition of a Microbial Fuel Cell (MFC) can enhance contaminant removal and has the potential to generate electrical energy. The objective o...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/77889 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The treatment of domestic wastewater using Modified Septic Tanks (MST) with an
anoxic-aerobic process employing a Moving Bed Biofilm Reactor (MBBR) with the
addition of a Microbial Fuel Cell (MFC) can enhance contaminant removal and
has the potential to generate electrical energy. The objective of this research is to
evaluate the performance of MST-MFC in removing organic and nutrient
contaminants, determine the potential of MST-MFC in electricity generation, and
identify the influence of Organic Loading Rate (OLR) variations. The reactor was
operated using bioball and Kaldness media, a Hydraulics Retention Time (HRT) of
36 hours, and a Resirculation Ratio (RR) of 4x. The working reactor volume was
190.13 liters, with the MFC employing graphite rod cathodes and carbon rod
anodes. The substrate was characterized as artificial domestic wastewater based
on the Maleer Communal WWTP with COD:TN:TP ratios of 280:35:4.6 and
430:35:4.6. An increase in the removal of COD and TP parameters was observed
in MST-MFC compared to MST alone in this study. MST-MFC could remove COD
and NH4
+ as well as total nitrogen (TN) and total phosphorus (TP) with average
efficiencies of 88.29%, 39.95%, 13.25%, 76.75% for OLR 1, and 94.39%, 30.60%,
36.54%, 73.29% for OLR 2, respectively. This research successfully demonstrated
the generation of electrical energy with Open Circuit Voltage (OCV) values of
around 0.58 volts and 0.45 volts, as well as maximum electric currents of 0.129 mA
and 0.143 mA for OLR 1 and 2, respectively, with a maximum current density value
of 54.710 mA/m2 at higher OLR variations. A correlation coefficient of 0.62 and a
p-value of 0.002 were obtained between electric current and COD removal,
indicating a strong positive and significant relationship. The possibility of
increased organic removal with increasing electric current was observed.
Furthermore, Coulombic Efficiency (CE) values of 35.79% and 17.31% were
obtained for OLR 1 and 2, respectively.
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