Simultaneous harvesting and cell disruption of microalgae using ozone bubbles:optimization and characterization study for biodiesel production  

作　　者：Wan N.A.Kadir Man K.Lam Yoshimitsu Uemura Jun W.Lim Peck L.Kiew Steven Lim Siti S.Rosli Chung Y.Wong Pau L.Show Keat T.Lee 

机构地区：[1]Chemical Engineering Department,Universiti Teknologi PETRONAS,Seri Iskandar,32610,Malaysia [2]HICoE-Centre for Biofuel and Biochemical Research,Institute of Self-Sustainable Building,Universiti Teknologi PETRONAS,Seri Iskandar,32610,Malaysia [3]NPO Kuramae Bioenergy,Tokyo,108-0023,Japan [4]Fundamental and Applied Sciences Department,Universiti Teknologi PETRONAS,Seri Iskandar,32610,Malaysia [5]Faculty of Engineering,Technology&Built Environment,University College Sedaya International,Cheras Kuala Lumpur,56000,Malaysia [6]Department of Chemical Engineering,Lee Kong Chian Faculty of Engineering and Science,Universiti Tunku Abdul Rahman,Sungai Long,Selangor,43000,Malaysia [7]Department of Chemical and Environmental Engineering,Faculty of Science and Engineering,University of Nottingham Malaysia,Semenyih,43500,Malaysia [8]School of Chemical Engineering,Universiti Sains Malaysia,Engineering Campus,Nibong Tebal,14300,Malaysia

出　　处：《Frontiers of Chemical Science and Engineering》2021年第5期1257-1268,共12页化学科学与工程前沿（英文版）

基　　金：the financial support provided by the Ministry of Higher Education(MOHE)Malaysia through Fundamental Research Grant Scheme(FRGS)with cost center Grant No.0153AB-L25;Fundamental Research Grant Scheme Malaysia’s Rising Star Awards 2016(FRGS MRSA 2016)with cost center Grant No.203/PJKIMIA/6071362;Support from MOHE through HICoE award to CBBR is duly acknowledged(cost centre Grant No.015MA0-052).

摘　　要：In the present study, ozone was introduced as an alternative approach to harvest and disrupt microalgae cells (Chlorella vulgaris) simultaneously for biodiesel production. At the optimum ozonation conditions (6.14 g·h^(−1) ozone concentration, 30 min ozonation time, 1 L·min^(−1) of ozone flowrate at medium pH of 10 and temperature of 30℃), the sedimentation efficiency of microalgae cells increased significantly from 12.56% to 68.62%. It was observed that the microalgae cells aggregated to form flocs after pretreated with ozone due to the increment of surface charge from −20 to −6.59 mV. Besides, ozone had successfully disrupted the microalgae cells and resulted in efficient lipid extraction, which was 1.9 times higher than the control sample. The extracted microalgae lipid was mainly consisted of methyl palmitate (C16:0), methyl oleate (C18:1) and methyl linolenate (C18:3), making it suitable for biodiesel production. Finally, utilization of recycled culture media after ozonation pre-treatment showed robust growth of microalgae, in which the biomass yield was maintained in the range of 0.796 to 0.879 g ·h^(−1) for 5 cycles of cultivation.

关 键 词：MICROALGAE BIODIESEL OZONATION pre-treatment LIPID 

分 类 号：TE626.24[石油与天然气工程—油气加工工程]