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Sub-critical water technology for enhanced extraction of bioactive compounds from microalgae

Awaluddin, Saidatul Aliaa and Siajam, Shamsul Izhar and Yoshida, Hiroyuki and Danquah, Michael Kobina and Harun, Mohd Razif (2016) Sub-critical water technology for enhanced extraction of bioactive compounds from microalgae. Journal of Engineering Science and Technology, 11 (spec. July). pp. 63-72. ISSN 1823-4690

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Current extraction technologies, including chemical, mechanical, and biological based methods, routinely used to extract biochemical compounds from microalgal biomass are disadvantaged with lengthy processing steps, energy intensive operations, high operational cost, lower product yields and environmentally unfriendly processes. Hence, the search for a sustainable low-cost technology for high throughput extract ion of biochemicals from microalgal biomass is major research endeavour. Sub-critical water extraction (SWE) technology has been used for the extraction of active compounds from different biomass materials with low process cost, mild operating conditions, short process times, and environmental sustainability. With the limited application of the technology to microalgal biomass, this work investigates the factors that affect the production yield of bioactive compounds during SWE of microalgal biomass. The SWE process was investigated under different process conditions include temperature (180-374 ̊C), extraction time (1-20min) and biomass loading (5-40 wt%). The results showed that the highest carbohydrate and protein yields of 14.2 g/100g and 31.2 g/100g, respectively, were achieved at 277ºC, 5 min with 5% of biomass loading. This productivity level which is in keeping or higher than that of current production systems endorses SWE as a promising technique for extracting bioactive compounds from microalgae.

Item Type:Article
Notes:Special issue on the 28th Symposium of Malaysian Chemical Engineers (SOMChE 2015)
Keyword:Sub-critical water extraction; Microalgae; Bioactive compounds; Biomass; Biochemical; Carbohydrate; Protein
Faculty or Institute:Faculty of Engineering
Publisher:School of Engineering, Taylor’s University College
ID Code:52037
Deposited By: Nabilah Mustapa
Deposited On:05 May 2017 10:32
Last Modified:05 May 2017 10:32

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