Bachelor of Science in Chemical Engineering

Performance investigation of membrane-less multi-anode shared cathode microbial fuel cell for bioelectricity production

Tue, 01 Aug 2023 00:00:00 GMT

Performance investigation of membrane-less multi-anode shared cathode microbial fuel cell for bioelectricity production Janolino, Arvi Jay H.; Uroa, Samantha Ellen R.; Yu, Shawn Mykhyll This study investigated the performance of the designed Membrane-Less Multi Anode Shared Cathode Microbial Fuel Cell (MMASC-MFC) for bioelectricity production under two modes of operation: recirculating and non-recirculating. The substrate utilized in this study was aquaculture wastewater and the anode effluent was entirely used as feed for cathode in sequential manner. The bioelectricity generation capacity of the MMASC-MFC was measured and quantified in terms of voltage, current, power density, and current density. Following a 5-day operational period, the MMASC-MFC operating in non-recirculating mode demonstrated notable performance as evidenced by its peak voltage, power density, and current density values of 225 mV; 3718.6 mW/m²; and, 16.532 mA/m², respectively. In contrast, the recirculating mode exhibited maximum voltage, power density, and current density measurements of 201 mV; 2967.61 mW/m²; and 14.758 mA/m², respectively. The MMASC-MFC demonstrated effective bioelectricity generation in both operational modes, with the non-recirculating mode exhibiting superior performance compared to the recirculating mode. The findings of this study emphasize the capacity of the MMASC-MFC system to generate bioelectricity and its sustainability for wastewater treatment and energy recovery in aquaculture sector. Abstract only

COD reduction in sugar mill effluent and methane production using upflow an aerobic sludge fixed-film digestion

Wed, 01 Jun 2022 00:00:00 GMT

COD reduction in sugar mill effluent and methane production using upflow an aerobic sludge fixed-film digestion Mesa, Felix Jr. A.; Sacapaña, Ivy A.; Samarista, Juan Carlos N. This study was conducted to design and construct an Upflow Anaerobic Sludge Fixed-Film Digester and to determine the effectiveness of digesting sugar mill effluents by anaerobic digestion. The results were compared to the current Ponding process of POME in terms of percent COD removal, COD retained, and COD removed in each HRT cycle (1.5 days), and to determine the presence of methane. The UASFF digester was designed to utilize the sugar mill effluent by maintaining a pH level of 6.8, the Hydraulic Retention Time (HRT) at 36 hours or 1.5 days, and a flow rate of 2.2 mL/min for optimal digestion process throughout the study. Results showed that the digester was able to purify at least 4L of effluent at the HRT of 36 hours. At HRT 7, the percent COD removal reached the highest of around 81.87%. As for the lowest, the 1st HRT cycle excluding the 0th HRT cycle has a value of 58.27%. The effect was minimal despite the increasing COD removal and stabilizing at around 80%. The presence of methane was determined to be present with the use of a gas tester. Abstract only

Performance evaluation of moving bed biofilm reactor for removal of organic matter and copper from sugar mill effluent

Mon, 01 Aug 2022 00:00:00 GMT

Performance evaluation of moving bed biofilm reactor for removal of organic matter and copper from sugar mill effluent Capilayan, Francis John A.; Isidro, Quer Lecso I.; Marquez, Patrick Jules This study was conducted to design and construct an Upflow Anaerobic Sludge Fixed-Film Digester and to determine the effectiveness of digesting sugar mill effluents by anaerobic digestion. The results were compared to the current Ponding process of POME in terms of percent COD removal, COD retained, and COD removed in each HRT cycle (1.5 days), and to determine the presence of methane. The UASFF digester was designed to utilize the sugar mill effluent by maintaining a pH level of 6.8, the Hydraulic Retention Time (HRT) at 36 hours or 1.5 days, and a flow rate of 2.2 mL/min for optimal digestion process throughout the study. Results showed that the digester was able to purify at least 4L of effluent at the HRT of 36 hours. At HRT 7, the percent COD removal reached the highest of around 81.87%. As for the lowest, the 1st HRT cycle excluding the 0th HRT cycle has a value of 58.27%. The effect was minimal despite the increasing COD removal and stabilizing at around 80%. The presence of methane was determined to be present with the use of a gas tester. Abstract only

Development of a fixed bed adsorption column with microwave-activated carbon from coconut (Cocos nucifera) coir for the removal of COD from Calajunan Sanitary Landfill Leachate

Wed, 01 May 2024 00:00:00 GMT

Development of a fixed bed adsorption column with microwave-activated carbon from coconut (Cocos nucifera) coir for the removal of COD from Calajunan Sanitary Landfill Leachate Diaz, Jea Erica D.; Guzman, Dionne Cidney J.; Padrigo, Prince Kenneth E.; Valguna, Ferlyn L. This study aimed to design, construct, and evaluate a fixed-bed adsorption column using microwave-activated carbon derived from coconut coir to address Chemical Oxygen Demand (COD) in landfill leachate from the Calajunan Sanitary Landfill. Laboratory experiments determined that a flow rate of 32 ml/min and an adsorbent mass of 3 grams were the most effective for COD removal. In scaled-up operations, a flow rate of 102.04 ml/min and an adsorbent mass of 17.08 grams were used. Linder these conditions, the column achieved a COD removal efficiency of 52.68% after 30 minutes, with Total Suspended Solids (TSS) removal reaching 89.77% after 60 minutes. Total Dissolved Solids (TDS) removal showed substantial improvements between 30 and 60 minutes, and the pH of the leachate shifted from neutral to alkaline before stabilizing. The study employed adsorption isotherms and kinetic models, with the pseudo-second-order model most accurately describing the adsorption kinetics, indicating that chemical sorption was the primary rate-limiting step. These results demonstrate the effectiveness of microwave-activated carbon from coconut coir in treating landfill leachate and highlight its potential for improved leachate management. Abstract only