relation: https://khub.utp.edu.my/scholars/9934/ title: Harvesting and pre-treatment of microalgae biomass via ozonation for lipid extraction: A preliminary study creator: Kadir, W.N.A. creator: Lam, M.K. creator: Uemura, Y. creator: Lim, J.-W. creator: Lee, K.T. description: Extraction of lipid is an important step in the production of microalgae biodiesel, but its efficiency depends on the species and also the pre-treatment methods for cell disruption before undergoing extraction stage. Thus, ozonation pre-treatment were used in this study to address the knowledge gap surrounding the harvesting and pre-treatment of microalgae for efficient lipid extraction. Chlorella vulgaris was ozonized in batches using lab-scale ozone generator (HATLEA) in the range of 5 to 25 minutes where the sedimentation efficiency of microalgae was found to be optimum at 25 minutes of ozonation time and flow rate of 3 L/min. Based on these conditions, the sedimentation efficiency was 31 higher compared to non-ozonated microalgae. Besides, lipid yield was increased from 18 (non-ozonated) to 25.7 after ozonation under optimum conditions. Therefore, it can be concluded that the ozonation pre-treatment of microalgae can be applied in the overall process of microalgae biodiesel production as alternative steps to reduce the cost of production. © 2018 Author(s). publisher: American Institute of Physics Inc. date: 2018 type: Conference or Workshop Item type: PeerReviewed identifier: Kadir, W.N.A. and Lam, M.K. and Uemura, Y. and Lim, J.-W. and Lee, K.T. (2018) Harvesting and pre-treatment of microalgae biomass via ozonation for lipid extraction: A preliminary study. In: UNSPECIFIED. relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054531502&doi=10.1063%2f1.5055466&partnerID=40&md5=cbb6fb953abae2dd5fd31617e88e92ee relation: 10.1063/1.5055466 identifier: 10.1063/1.5055466