Aldjay Magnaye - Academia.edu (original) (raw)
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Imam Abdulrahman bin Faisal University
Birla Institute of Technology, Mesra (Ranchi) India
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Papers by Aldjay Magnaye
Journal of Water Resource and Protection, 2009
A preliminary study on nitrogen and organic removal efficiency of a lab-scale system using aerobi... more A preliminary study on nitrogen and organic removal efficiency of a lab-scale system using aerobic and anaerobic reactors was performed. A simulated wastewater containing elevated levels of nitrogen was used. This paper aims to compare the efficiency of aerobic and anaerobic reactors in achieving nitrogen and chemical oxygen demand (COD) removal of nutrient-rich wastewater. It also presents the start-up experimentation conducted on simulated wastewater using two different reactors configured as aerobic and anaerobic. Start-up experiments were carried out using a 5-liter acrylic aerobic reactor and a 4-liter flask anaerobic reactor containing activated sludge taken from De La Salle University (DLSU) wastewater treatment plant as a source of inoculum. Simulated wastewater was continuously fed to the two reactors and the time course of biomass growth was monitored by measuring the biomass concentration represented by mixed liquor volatile solids (MLVS). The time course of organic pollutant reduction by measuring the chemical oxygen demand (COD) was conducted until steady state condition was reached. On the other hand, COD and nitrogen tests such as Ammonia nitrogen (NH 3-N), Nitrite nitrogen (NO 2-N), Nitrate nitrogen (NO 3-N) were also performed using 5 batch aerobic reactors containing different concentrations of wastewater and a single batch anaerobic reactor to see the effect of different feed concentrations in the removal of nitrogen. Preliminary results showed that 98% reduction in COD was obtained in aerobic reactor, as supported by increasing concentration of MLVS, with a hydraulic retention time (HRT) of 5 hours after 11 days while 34% reduction in COD was obtained in anaerobic reactor with the same HRT after 14 days.
Bioethanol successfully finds its role in the development of renewable energy sources to suppleme... more Bioethanol successfully finds its role in the development of renewable energy sources to supplement the world's increasing demand in energy supply. In this study, elephant foot yam (Amorphophalluspeoniifolius), a starch-based crop, abundantly grown in tropical countries like Philippines, was used for the evaluation of the effect of substrate concentration and yeast loading (Saccharomyces cerevisiae) in Simultaneous Saccharification and Fermentation (SSF). In SSF, the optimum condition was observed at10% w/v substrate concentration in 20 mL yeast loadingwith an ethanol yield of 12.02 ± 0.21 %. As substrate concentration decreases and yeast loading increases, percent ethanol yield increases. Best mathematical model was generated to describe the relationship of the substrate concentration and yeast loading to ethanol yield. The generated quadratic model, í µí± 2.47 = 80.63 − 84.46 í µí°´+ 126.73 í µí°µ − 17.49í µí°´í µí°µ + 65.59í µí°´2 + 91.02í µí°µ 2 ,can explain 99.96 % (R 2) o...
Journal of Water Resource and Protection, 2009
A preliminary study on nitrogen and organic removal efficiency of a lab-scale system using aerobi... more A preliminary study on nitrogen and organic removal efficiency of a lab-scale system using aerobic and anaerobic reactors was performed. A simulated wastewater containing elevated levels of nitrogen was used. This paper aims to compare the efficiency of aerobic and anaerobic reactors in achieving nitrogen and chemical oxygen demand (COD) removal of nutrient-rich wastewater. It also presents the start-up experimentation conducted on simulated wastewater using two different reactors configured as aerobic and anaerobic. Start-up experiments were carried out using a 5-liter acrylic aerobic reactor and a 4-liter flask anaerobic reactor containing activated sludge taken from De La Salle University (DLSU) wastewater treatment plant as a source of inoculum. Simulated wastewater was continuously fed to the two reactors and the time course of biomass growth was monitored by measuring the biomass concentration represented by mixed liquor volatile solids (MLVS). The time course of organic pollutant reduction by measuring the chemical oxygen demand (COD) was conducted until steady state condition was reached. On the other hand, COD and nitrogen tests such as Ammonia nitrogen (NH 3-N), Nitrite nitrogen (NO 2-N), Nitrate nitrogen (NO 3-N) were also performed using 5 batch aerobic reactors containing different concentrations of wastewater and a single batch anaerobic reactor to see the effect of different feed concentrations in the removal of nitrogen. Preliminary results showed that 98% reduction in COD was obtained in aerobic reactor, as supported by increasing concentration of MLVS, with a hydraulic retention time (HRT) of 5 hours after 11 days while 34% reduction in COD was obtained in anaerobic reactor with the same HRT after 14 days.
Bioethanol successfully finds its role in the development of renewable energy sources to suppleme... more Bioethanol successfully finds its role in the development of renewable energy sources to supplement the world's increasing demand in energy supply. In this study, elephant foot yam (Amorphophalluspeoniifolius), a starch-based crop, abundantly grown in tropical countries like Philippines, was used for the evaluation of the effect of substrate concentration and yeast loading (Saccharomyces cerevisiae) in Simultaneous Saccharification and Fermentation (SSF). In SSF, the optimum condition was observed at10% w/v substrate concentration in 20 mL yeast loadingwith an ethanol yield of 12.02 ± 0.21 %. As substrate concentration decreases and yeast loading increases, percent ethanol yield increases. Best mathematical model was generated to describe the relationship of the substrate concentration and yeast loading to ethanol yield. The generated quadratic model, í µí± 2.47 = 80.63 − 84.46 í µí°´+ 126.73 í µí°µ − 17.49í µí°´í µí°µ + 65.59í µí°´2 + 91.02í µí°µ 2 ,can explain 99.96 % (R 2) o...