Improvement of lipid yield from microalgae Spirulina platensis using ultrasound assisted osmotic shock extraction method

International Symposium on Food and Agro-biodiversity 2017

农业科学;生物科学

Adetya, N.P.^1 ; Hadiyanto, H.^1,2

Department of Chemical Engineering Faculty of Engineering, Diponegoro University, Jl. Prof Soedarto, SH Tembalang, Semarang

50275, Indonesia^1

Master Program of Environmental Science, School of Postgraduate Studies, Diponegoro University, Jl. Imam Bardjo No 3-5, Semarang, Indonesia^2

关键词: Extraction process;    Microalga;    NaCl concentration;    Optimal conditions;    Osmotic shocks;    Response surface methodology;    Spirulina platensis;    Ultrasound frequency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/102/1/012012/pdf
DOI  :  10.1088/1755-1315/102/1/012012

来源: IOP

【 摘 要 】

Microalgae Spirulina sp. has been identified as potential source of natural food supplement and food colorant. The high water content of microalgae (70-90%) causes an obstacle in biomass dehydration which requires large amounts of energy, eventually damaging the lipid in the microalgae. Therefore, the lipid must be extracted by using a suitable method which complies to wet biomass conditions. One of the methods is applying osmotic shock. This study was aimed to investigate the influence of osmotic agent (NaCl) concentration (10-30%) and extraction time (20-50 min) on yield of lipid and also to determine the optimal conditions in the extraction process through response surface methodology. The extraction was conducted at a temperature of 40°C under ultrasound frequency of 40 kHz. The result showed that the optimum yield lipid obtained was 6.39% in 16.98% NaCl concentration for 36 minutes 10 seconds.