Solid–liquid mass transfer coefficients in an ultrasound-irradiated extraction of iota-carrageenan

Duduku Krishnaiah and D. M. Reddy Prasad and Rosalam Sarbatly and Awang Bono and S.M. Anisuzzaman and Kamatam, Krishnaiah (2013) Solid–liquid mass transfer coefficients in an ultrasound-irradiated extraction of iota-carrageenan. Developments in Sustainable Chemical and Bioprocess Technology. pp. 249-261. ISSN 978-1-4614-6207-1


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A 20-kHz intensity ultrasound was used in the extraction of iota-carrageenan from Eucheuma denticulatum seaweed by using water as solvent. In a simplified extraction procedure, the seaweed particle size of 0.7125E-03 m, 1.2E-3 m, and 1.7E-03 m diameter were studied at different ultrasonic amplitude levels, ranging from 2.08E-06 to 6.4E-06 m and the temperatures from 30 to 60 °C. The maximum iota-carrageenan yield obtained was 57.2 %. This study suggested that ultrasound intensity employed reduced the extraction time required and improved the yield of iota-carrageenan by 6 %. The particle diameter variation during the extraction was found to be a linear equation. The solid-liquid mass transfer coefficient was correlated for ultrasound extraction of iota-carrageenan in terms of operating conditions employed in this investigation as kL = 0:0027A0.866Dp -0.533(T)0.133.

Item Type: Chapter In Book
Keyword: Extraction, Mass transfer coefficient, Particle swelling, Ultrasound intensity
Subjects: T Technology > TP Chemical technology
Department: FACULTY > Faculty of Engineering
Date Deposited: 05 Jul 2018 14:41
Last Modified: 05 Jul 2018 14:41

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