Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production

Oscillatory flow can enhance mass transfer, mixing in flocculation, low shear and controllable mixing conditions. A recent development in oscillatory baffled reactor technology is down-scaling the reactor, so that it can be used for applications such as small-scale continuous production of bioethano...

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Main Author:	Syamsutajri, Syamsol Bahri
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/16159/19/Development%20of%20mesoscale%20oscillatory%20baffled%20reactor%20%28MOBR%29%20for%20bioethanol%20production.pdf
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spelling	my-ump-ir.161592021-11-25T03:56:42Z Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production 2016-05 Syamsutajri, Syamsol Bahri TP Chemical technology Oscillatory flow can enhance mass transfer, mixing in flocculation, low shear and controllable mixing conditions. A recent development in oscillatory baffled reactor technology is down-scaling the reactor, so that it can be used for applications such as small-scale continuous production of bioethanol. In the current study, a new design of mesoscale oscillatory baffled reactor (MOBR) with central baffle system was developed and fabricated at “mesoscales” (typically 5 mm diameter). The mixing conditions inside the MOBR were evaluated and the reactor performance was analyzed for bioethanol production. The mixing conditions inside the MOBR were analyzed by evaluating the residense time distribution (RTD) against the dynamic parameters of net flow Reynolds number (Ren) at 4.2, 8.4 and 12.6 corresponding to flow rates of 1.0, 2.0 and 3.0 ml/min respectively, oscillatory Reynolds number (Reo) between 62 to 622 and Strouhal number (Str) between 0.1 to 1.59. The effect of oscillation frequency, oscillation amplitude, net flow, oscillation flow on RTD performance and dependence of the fluid mixing on the velocity ratio were also studied at frequency, amplitude and velocity ratio ranging from 4 to 8 Hz, 1 to 4 mm and 1 to 118 respectively. Next, the reactor performance of the MOBR was compared with conventional stirred tank reactor (STR) to evaluate the bioethanol fermentation performance using Sacchromyces cerevisiae at similar power density of 24.21, 57.38, 112.35 and 193.67 Wm-3 by varying frequency (f), amplitude (xo) and agitation speed. Then the biomass concentration, glucose consumption and bioethanol concentration were analyzed using cell dry weight (CDW), 3,5-dinitrosalicyclic acid (DNS) and high performance liquid chromatograph (HPLC) methods, respectively. It was observed that the MOBR improved the mixing intensity resulted in lower glucose consumption 0.988 gL-1 obtained after 12 hours and the bioethanol concentration 38.98 gL-1 at power density of 193.67 Wm-3. Overall, an improvement of 24.1% yield of bioethanol was generated using MOBR as STR only produced the highest yield of 15.4%. 2016-05 Thesis http://umpir.ump.edu.my/id/eprint/16159/ http://umpir.ump.edu.my/id/eprint/16159/19/Development%20of%20mesoscale%20oscillatory%20baffled%20reactor%20%28MOBR%29%20for%20bioethanol%20production.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Chemical and Natural Resources Engineering
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Syamsutajri, Syamsol Bahri Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
description	Oscillatory flow can enhance mass transfer, mixing in flocculation, low shear and controllable mixing conditions. A recent development in oscillatory baffled reactor technology is down-scaling the reactor, so that it can be used for applications such as small-scale continuous production of bioethanol. In the current study, a new design of mesoscale oscillatory baffled reactor (MOBR) with central baffle system was developed and fabricated at “mesoscales” (typically 5 mm diameter). The mixing conditions inside the MOBR were evaluated and the reactor performance was analyzed for bioethanol production. The mixing conditions inside the MOBR were analyzed by evaluating the residense time distribution (RTD) against the dynamic parameters of net flow Reynolds number (Ren) at 4.2, 8.4 and 12.6 corresponding to flow rates of 1.0, 2.0 and 3.0 ml/min respectively, oscillatory Reynolds number (Reo) between 62 to 622 and Strouhal number (Str) between 0.1 to 1.59. The effect of oscillation frequency, oscillation amplitude, net flow, oscillation flow on RTD performance and dependence of the fluid mixing on the velocity ratio were also studied at frequency, amplitude and velocity ratio ranging from 4 to 8 Hz, 1 to 4 mm and 1 to 118 respectively. Next, the reactor performance of the MOBR was compared with conventional stirred tank reactor (STR) to evaluate the bioethanol fermentation performance using Sacchromyces cerevisiae at similar power density of 24.21, 57.38, 112.35 and 193.67 Wm-3 by varying frequency (f), amplitude (xo) and agitation speed. Then the biomass concentration, glucose consumption and bioethanol concentration were analyzed using cell dry weight (CDW), 3,5-dinitrosalicyclic acid (DNS) and high performance liquid chromatograph (HPLC) methods, respectively. It was observed that the MOBR improved the mixing intensity resulted in lower glucose consumption 0.988 gL-1 obtained after 12 hours and the bioethanol concentration 38.98 gL-1 at power density of 193.67 Wm-3. Overall, an improvement of 24.1% yield of bioethanol was generated using MOBR as STR only produced the highest yield of 15.4%.
format	Thesis
qualification_level	Master's degree
author	Syamsutajri, Syamsol Bahri
author_facet	Syamsutajri, Syamsol Bahri
author_sort	Syamsutajri, Syamsol Bahri
title	Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
title_short	Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
title_full	Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
title_fullStr	Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
title_full_unstemmed	Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production
title_sort	development of mesoscale oscillatory baffled reactor (mobr) for bioethanol production
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Chemical and Natural Resources Engineering
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/16159/19/Development%20of%20mesoscale%20oscillatory%20baffled%20reactor%20%28MOBR%29%20for%20bioethanol%20production.pdf
_version_	1783732005388681216

Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production

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