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Ronald Halim

Bio: Ronald Halim is an academic researcher from University of Melbourne. The author has contributed to research in topics: Extraction (chemistry) & Chemistry. The author has an hindex of 12, co-authored 21 publications receiving 2146 citations. Previous affiliations of Ronald Halim include Monash University, Clayton campus & Monash University.

Papers
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Journal ArticleDOI
TL;DR: This study examines the principles involved in lipid extraction from microalgal cells, a crucial downstream processing step in the production of microAlgal biodiesel, and analyzes the different technological options currently available for laboratory-scale microalGal lipid extraction, with a primary focus on the prospect of organic solvent and supercritical fluid extraction.

905 citations

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TL;DR: The mass transfer coefficient (k) for lipid extraction under supercritical conditions was found to increase with fluid dielectric constant as well as fluid density, and decreasing temperature and increasing pressure resulted in increased lipid yields.

673 citations

Journal ArticleDOI
TL;DR: This study investigated the use of high-pressure homogenization, ultrasonication, bead beating, and sulfuric acid treatment as laboratory-scale disruption methods for microalgal cells.

290 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the process engineering of chlorophyll extraction from microalgae is presented, which suggests supercritical fluid extraction to be superior to organic solvent extraction.
Abstract: Chlorophyll is an essential compound in many everyday products. It is used not only as an additive in pharmaceutical and cosmetic products but also as a natural food colouring agent. Additionally, it has antioxidant and antimutagenic properties. This review discusses the process engineering of chlorophyll extraction from microalgae. Different chlorophyll extraction methods and chlorophyll purification techniques are evaluated. Our preliminary analysis suggests supercritical fluid extraction to be superior to organic solvent extraction. When compared to spectroscopic technique, high performance liquid chromatography was shown to be more accurate and sensitive for chlorophyll analysis. Finally, through capture and wastewater treatment, microalgae cultivation process was shown to have strong potential for mitigation of environmental impacts.

265 citations

Journal ArticleDOI
TL;DR: This study investigated the use of ultrasonication and high-pressure homogenization (HPH) as cell disruption methods for two microalgal species, Tetraselmis suecica (TS) and Chlorococcum sp.

120 citations


Cited by
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Journal ArticleDOI
TL;DR: The present review describes the advantages of microalgae for the production of biofuels and various bioactive compounds and discusses culturing parameters.
Abstract: Microalgae have recently attracted considerable interest worldwide, due to their extensive application potential in the renewable energy, biopharmaceutical, and nutraceutical industries. Microalgae are renewable, sustainable, and economical sources of biofuels, bioactive medicinal products, and food ingredients. Several microalgae species have been investigated for their potential as value-added products with remarkable pharmacological and biological qualities. As biofuels, they are a perfect substitute to liquid fossil fuels with respect to cost, renewability, and environmental concerns. Microalgae have a significant ability to convert atmospheric CO2 to useful products such as carbohydrates, lipids, and other bioactive metabolites. Although microalgae are feasible sources for bioenergy and biopharmaceuticals in general, some limitations and challenges remain, which must be overcome to upgrade the technology from pilot-phase to industrial level. The most challenging and crucial issues are enhancing microalgae growth rate and product synthesis, dewatering algae culture for biomass production, pretreating biomass, and optimizing the fermentation process in case of algal bioethanol production. The present review describes the advantages of microalgae for the production of biofuels and various bioactive compounds and discusses culturing parameters.

1,125 citations

Journal ArticleDOI
TL;DR: This study examines the principles involved in lipid extraction from microalgal cells, a crucial downstream processing step in the production of microAlgal biodiesel, and analyzes the different technological options currently available for laboratory-scale microalGal lipid extraction, with a primary focus on the prospect of organic solvent and supercritical fluid extraction.

905 citations

Journal ArticleDOI
TL;DR: The practical problems that are facing the microalgae biofuel industry will be depicted, covering upstream to downstream activities by accessing the latest research reports and critical data analysis and several interlink solutions to the problems will be suggested with the purpose to revolutionize the entire microAlgae Biofuel industry towards long-term sustainability.

829 citations

Journal ArticleDOI
TL;DR: An empirical and critical analysis on the potential of translating research findings from laboratory scale trials to full scale application and current methods for biomass harvesting and lipid extraction are critically evaluated.

755 citations