Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent

This study is an extension of a 500 m3 methane recovery test plant study located at Serting Hilir Palm Oil Mill, Negeri Sembilan conducted by our research group on anaerobic treatment of palm oil mill effluent (POME). Biomass washout has become one of the problems faced by our research group because...

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Main Author: Basri, Mohamad Firwance
Format: Thesis
Language:English
English
Published: 2007
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Online Access:http://psasir.upm.edu.my/id/eprint/5168/1/FK_2007_3.pdf
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spelling my-upm-ir.51682013-05-27T07:20:53Z Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent 2007 Basri, Mohamad Firwance This study is an extension of a 500 m3 methane recovery test plant study located at Serting Hilir Palm Oil Mill, Negeri Sembilan conducted by our research group on anaerobic treatment of palm oil mill effluent (POME). Biomass washout has become one of the problems faced by our research group because of the continuous mixing of effluent during anaerobic treatment of POME. Therefore, in this study, anaerobic POME treatment using a scaled down 50 L bioreactor which mimics the 500 m3 bioreactor was carried out to improve biogas production with and without biomass sedimentation. Three series of experiments were conducted under different conditions in terms of biomass sedimentation applied to the system. The first experiment was operated under semi-continuous mode whereas the second and third experiments were operated based on mix and settle mode system. As expected, by retaining biomass in the bioreactor, there was an improvement on the anaerobic process as the system from the second and third experiments were be able to operate at organic loading rate (OLR) of 3.5 and 6.0 kg COD/m3/d, respectively while the first experiment only achieved OLR of 3.0 kg COD/m3/d. At these OLR value, the hydraulic retention time (HRT) obtained was 10 days in the third experiment and followed by the first and second experiments with 15 days of HRT. The highest biogas production was achieved from the third experiment which was 2.42 m3/m3 of reactor/d. This was followed by second and first experiments which were 1.55 and 1.20 m3/m3 of reactor/d respectively. The highest methane production rate was also obtained in the third experiment with 0.992 m3/m3 of reactor/d as compared to the second and first experiments which were 0.655 and 0.553 m3/m3 of reactor/d, respectively. For COD removal, more than 90% of COD was removed for all of the experiments. The experimental data for the first experiment was applied to the two-stage mathematical model of acidogenesis and methanogenesis which were developed by previous researchers. The first experimental data was used because it represented the actual scenario on how the methane recovery test plant was operated in which biomass washout was taken into consideration. In modelling the behavior of the anaerobic digestion process, the mathematical model was used to simulate the methane production from the anaerobic treatment of POME. From the simulation result, the model was shown to be satisfactory for simulating methane production from the anaerobic treatment of POME. Methana - Malaysia Oil Palm wilt - Negeri sembilan 2007 Thesis http://psasir.upm.edu.my/id/eprint/5168/ http://psasir.upm.edu.my/id/eprint/5168/1/FK_2007_3.pdf application/pdf en public masters Universiti Putra Malaysia Methana - Malaysia Oil Palm wilt - Negeri sembilan Faculty of Engineering English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Methana - Malaysia
Oil Palm wilt - Negeri sembilan

spellingShingle Methana - Malaysia
Oil Palm wilt - Negeri sembilan

Basri, Mohamad Firwance
Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
description This study is an extension of a 500 m3 methane recovery test plant study located at Serting Hilir Palm Oil Mill, Negeri Sembilan conducted by our research group on anaerobic treatment of palm oil mill effluent (POME). Biomass washout has become one of the problems faced by our research group because of the continuous mixing of effluent during anaerobic treatment of POME. Therefore, in this study, anaerobic POME treatment using a scaled down 50 L bioreactor which mimics the 500 m3 bioreactor was carried out to improve biogas production with and without biomass sedimentation. Three series of experiments were conducted under different conditions in terms of biomass sedimentation applied to the system. The first experiment was operated under semi-continuous mode whereas the second and third experiments were operated based on mix and settle mode system. As expected, by retaining biomass in the bioreactor, there was an improvement on the anaerobic process as the system from the second and third experiments were be able to operate at organic loading rate (OLR) of 3.5 and 6.0 kg COD/m3/d, respectively while the first experiment only achieved OLR of 3.0 kg COD/m3/d. At these OLR value, the hydraulic retention time (HRT) obtained was 10 days in the third experiment and followed by the first and second experiments with 15 days of HRT. The highest biogas production was achieved from the third experiment which was 2.42 m3/m3 of reactor/d. This was followed by second and first experiments which were 1.55 and 1.20 m3/m3 of reactor/d respectively. The highest methane production rate was also obtained in the third experiment with 0.992 m3/m3 of reactor/d as compared to the second and first experiments which were 0.655 and 0.553 m3/m3 of reactor/d, respectively. For COD removal, more than 90% of COD was removed for all of the experiments. The experimental data for the first experiment was applied to the two-stage mathematical model of acidogenesis and methanogenesis which were developed by previous researchers. The first experimental data was used because it represented the actual scenario on how the methane recovery test plant was operated in which biomass washout was taken into consideration. In modelling the behavior of the anaerobic digestion process, the mathematical model was used to simulate the methane production from the anaerobic treatment of POME. From the simulation result, the model was shown to be satisfactory for simulating methane production from the anaerobic treatment of POME.
format Thesis
qualification_level Master's degree
author Basri, Mohamad Firwance
author_facet Basri, Mohamad Firwance
author_sort Basri, Mohamad Firwance
title Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
title_short Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
title_full Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
title_fullStr Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
title_full_unstemmed Scaled-Down Biogas Production From Anaerobic Treatment Of Palm Oil Mill Effluent
title_sort scaled-down biogas production from anaerobic treatment of palm oil mill effluent
granting_institution Universiti Putra Malaysia
granting_department Faculty of Engineering
publishDate 2007
url http://psasir.upm.edu.my/id/eprint/5168/1/FK_2007_3.pdf
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