03342ntm a2200289 a 4500 vtls000098258 KUKTEM 20251117113340.0 161205s2016 my da f abm 000 0 eng d THE0001020(Local) 201905241102 nazirah 201710161431 aishah 201612051133 saini UMP FKKSA .S93 2016 r Thesis Syamsutajri Syamsol Bahri Development of mesoscale oscillatory baffled reactor (MOBR) for bioethanol production / Syamsutajri Syamsol Bahri Kuantan, Pahang : UMP , 2016 xviii, 125 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Faculty of Chemical and Natural Resources Engineering Thesis (Master of Engineering) -- Universiti Malaysia Pahang – 2016 Bibliography : p. 96-106 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%. Faculty of Chemical and Natural Resources Engineering Dissertations Universities and Colleges Dissertations Theses http://ecollib.ump.edu.my/3508/ Library access only 0 0 lcc 0 6 10000 10000 2019-09-04 0 FKKSA .S93 2016 r Thesis 0000116463 2019-09-04 00:00:00 1 2019-09-04 THESIS 0 0 lcc 0 1 10000 10000 2019-09-04 0 CD 10589 | FKKSA .S93 2016 r Thesis 0000116464 2019-09-04 00:00:00 1 2019-09-04 THESIS VIRTUA40 7167 7173 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5000*5020*5040*5200*6100*6500*6501*8560*9992