BIOHYDROGEN GAS STRIPPING FORMED IN ANAEROBIC PROCESS OF HIGH-CONCENTRATION ARTIFICIAL WASTEWATER USING NITROGEN GAS FLUSHING
The use of biomass as a renewable energy source has become a primary focus to decrease reliance on fossil fuels and tackle environmental issues. Due to its high organic content, palm oil mill effluent (POME) holds significant potential as a feedstock for renewable energy generation, offering an a...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/87025 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The use of biomass as a renewable energy source has become a primary focus to
decrease reliance on fossil fuels and tackle environmental issues. Due to its high
organic content, palm oil mill effluent (POME) holds significant potential as a
feedstock for renewable energy generation, offering an alternative to food crops in
bioenergy production. Renewable energy production from POME can be achieved
through anaerobic bioconversion via fermentation. During the acidogenesis phase,
bioenergy products such as bioethanol, biohydrogen, and volatile fatty acids can
be produced. Several previous studies have investigated the conversion of POME
waste into hydrogen, but the biohydrogen concentration remains relatively low.
This is likely due to the majority of the hydrogen being dissolved in the liquid phase,
making it difficult to measure directly. The addition of nitrogen flushing into the
reactor aims to promote the release of dissolved biohydrogen into the gas phase.
The effectiveness of hydrogen gas release is evaluated using mass transfer
coefficients (kLa and kL) by varying the superficial gas velocity. The hydrodynamic
properties of the gas bubbles formed are analyzed to understand the gas transfer
process. An increase in the volumetric flow rate and superficial gas velocity
positively affects the gas transfer process, with the optimum mass transfer
coefficient achieved at a superficial velocity of 0.0079 m/s, yielding a mass transfer
coefficient (kLa) and gas transfer coefficient (kL) of 0.00032 s-1 and 2.69×10-5 m/s,
respectively. The application of nitrogen gas flushing with a gas superficial velocity
of 0.0079 m/s in the processing of high organic artificial waste can increase
hydrogen gas concentration, with a maximum concentration increase of 41.7% and
the maximum biohydrogen concentration produced being 17.3%, achieved at a
reaction time of 72 hours. |
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