Design and operation of agar extraction vessel: Study of extraction mechanisms and consideration of the scale-up principle
1992
Noppadon Cheamsawat | Duangporn Puttiboonyakul (King Mongkut's Institute of Technology Thonburi, Bangkok (Thailand). Faculty of Engineering. Dept. of Chemical Engineering)
Agar is produced from red seaweed, Gracilaria spp., by water extraction at the temperature between 75-100 deg C. The intraparticle mass transport is the controlling mechanism in the normal extraction condition. In general, the agar extraction yield increases with increase in temperature, and this effect is more pronounced at larger particle size of seaweed. The programed temperature control extraction; that is the control of a proper temperature at different phase of extraction, may be needed to improve the yield of agar extraction. In scaling-up the extraction vessel the shear field of the mixing liquid and the power per unit volume may play the important roles in controlling the performance of the extractor.
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