IJE TRANSACTIONS A: Basics Vol. 31, No. 4 (April 2018) 340-347    Article in Press

PDF URL: http://www.ije.ir/Vol31/No4/A/20.pdf  
downloaded Downloaded: 2   viewed Viewed: 89

G. Najafpour, A. Farahi and A. A. Ghoreyshi
( Received: December 05, 2017 – Accepted: January 04, 2018 )

Abstract    Broomcorn seed (Sorghum vulgare) was used as raw material for bioethanol production. Optimum conditions obtained from response surface method. Broomcorn seed flour (45 g/l) was treated by alkaline treatment and dual enzymatic hydrolysis (0.7 g/l of α- amylase and 0.42 g/l of amyloglucosidase). The resulted total sugars of 25.5 g/L was used in conventional bioethanol production (8.1 g/l) using Saccharomyce scerevisiae. Enhanced bioethanol production was performed in membrane bioreactor (MBR) with integrated batch fermentation and membrane pervaporation process. Application of commercial PDMS/PET/PI membrane in MBR, resulted in ethanol concentration of 10.15 g/l in broth and 70.2 g/l in cold trap of MBR. Cell concentration in broth has increased from 7.2 in conventional fermentation to 9.05 g/l in MBR. In addition, ethanol production in MBR using fabricated membrane having ethanol separation factor of 8.7; ethanol concentration in broth and cold trap were 11.1 and 88.5 g/ l, respectively. Also the cell concentration of 10.2 g/l was obtained in MBR with fabricated membrane. In MBR, surface modified MWCNT coated on membrane having ethanol separation factor of 10.2, resulted ethanol concentration of 11.9 and 110 g/l in broth and cold trap, respectively. Finally, for MBR using modified membrane the cell concentration of 11.01 g/l was obtained.


Keywords    Bioethanol; MWCNT.PDMS/PES.PVP composite membrane; broomcorn seed


چکیده    We shall do it later for translations.

References    [1] D. Cantú-Lozano, G. Luna-Solano, Bioethanol production process rheology, Industrial crops and products, 106(2017) 59-74. [2] A. El-Sebaii, S. Shalaby, Solar drying of agricultural products: A review, Renewable and Sustainable Energy Reviews, 16 (2012) 37-43. [3] P. Peng, B. Shi, Y. Lan, A review of membrane materials for ethanol recovery by pervaporation, Separation Science and Technology, 46 (2010) 234-246. [4] P. Wei, L.-H. Cheng, L. Zhang, X.-H. Xu, H.-l. Chen, C.-j. Gao, A review of membrane technology for bioethanol production, Renewable and Sustainable Energy Reviews, 30 (2014) 388-400. [5] M. Rezakazemi, K. Shahidi, T. Mohammadi, Synthetic PDMS composite membranes for pervaporation dehydration of ethanol, Desalination and Water Treatment, 54 (2015) 1542-1549. [6] M. Nasidi, R. Agu, Y. Deeni, G. Walker, Utilization of whole sorghum crop residues for bioethanol production, Journal of the Institute of Brewing, 122 (2016) 268-277. [7] A. Farahi, G. Najafpour, A. Ghoreyshi, M. Mohammadi, M. Esfahanian, Enzymatic production of reducing sugars from broomcorn seed (Sorghum vulgare): process optimization and kinetic studies, World Applied Sciences Journal, 18 (2012) 568-574. [8] P. Ariyajaroenwong, P. Laopaiboon, A. Salakkam, P. Srinophakun, L. Laopaiboon, Kinetic models for batch and continuous ethanol fermentation from sweet sorghum juice by yeast immobilized on sweet sorghum stalks, Journal of the Taiwan Institute of Chemical Engineers, 66 (2016) 210-216. [9] E. Castro, I.U. Nieves, V. Rondón, W.J. Sagues, M.T. Fernández-Sandoval, L.P. Yomano, S.W. York, J. Erickson, W. Vermerris, Potential for ethanol production from different sorghum cultivars, Industrial Crops and Products, 109 (2017) 367-373. [10] Y. Jafari, K. Karimi, H. Amiri, Efficient bioconversion of whole sweet sorghum plant to acetone, butanol, and ethanol improved by acetone delignification, Journal of Cleaner Production, 166 (2017) 1428-1437. [11] H. Singh, S.K. Soni, Production of starch-gel digesting amyloglucosidase by Aspergillus oryzae HS-3 in solid state fermentation, Process Biochemistry, 37 (2001) 453-459. [12] A. Brunetti, P.F. Zito, L. Giorno, E. Drioli, G. Barbieri, Membrane reactors for low temperature applications: An overview, Chemical Engineering and Processing: Process Intensification, (2017). [13] O. Trifunović, G. Trägårdh, The influence of support layer on mass transport of homologous series of alcohols and esters through composite pervaporation membranes, Journal of membrane science, 259 (2005) 122-134. [14] C. Fu, D. Cai, S. Hu, Q. Miao, Y. Wang, P. Qin, Z. Wang, T. Tan, Ethanol fermentation integrated with PDMS composite membrane: an effective process, Bioresource technology, 200 (2016) 648-657. [15] M. Esfahanian, A. Ghorbanfarahi, A. Ghoreyshi, G. Najafpour, H. Younesi, A. Ahmad, Enhanced bioethanol production in batch fermentation by pervaporation using a PDMS membrane bioreactor, International Journal of Engineering-Transactions B: Applications, 25 (2012) 249. [16] Y.H. Tan, M.O. Abdullah, C. Nolasco-Hipolito, N.S.A. Zauzi, Application of RSM and Taguchi methods for optimizing the transesterification of waste cooking oil catalyzed by solid ostrich and chicken-eggshell derived CaO, Renewable Energy, 114 (2017) 437-447. [17] D. Verma, P.S. Thakur, S. Padhi, T. Khuroo, S. Talegaonkar, Z. Iqbal, Design expert assisted nanoformulation design for co-delivery of topotecan and thymoquinone: Optimization, in vitro characterization and stability assessment, Journal of Molecular Liquids, 242 (2017) 382-394. [18] M. de Oliveira Faber, V.S. Ferreira-Leitão, Optimization of biohydrogen yield produced by bacterial consortia using residual glycerin from biodiesel production, Bioresource technology, 219 (2016) 365-370. [19] M. Esfahanian, A.S. Rad, S. Khoshhal, G. Najafpour, B. Asghari, Mathematical modeling of continuous ethanol fermentation in a membrane bioreactor by pervaporation compared to conventional system: Genetic algorithm, Bioresource technology, 212 (2016) 62-71.

Download PDF 

International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir