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Utilization of Alfalfa through integrated green biorefinery: Effects of fractionation processes on green juice extraction

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131587359,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131587359) @2013
Authors:   Shuangning Xiu, Abolghasem Shahbazi, Lijun Wang
Keywords:   Biorefinery Alfalfa green processing protein

Abstract. A green refinery is an integrated concept to utilize green biomass as an abundant and versatile raw material for the manufacture of industrial products. The initial fractionation of the green biomass remains an essential operation for green biorefinery process. In this paper, mechanical separation and gravity settling techniques, by means of centrifuge and filtration were used to extract juice from green alfalfa. The fractionation processes on mass flows of plant compounds into extracted juice was investigated for Alfalfa. Results show that proportionately 0.18-0.27 of the dry matter contained in the alfalfa was directed into the green juice during the centrifugation process, while filtration process results lower dry matter transfer rate of 0.07-0.16 into the green juice. The juices after filtration process have lower solid content than the juices from centrifugal separation for both immature and mature alfalfa with a value of 2.1%-2.2%. In conclusion, centrifugation was not as effective as filtration in removing particulate and colloidal matter from both mature and immature alfalfa. Normal filtration of the afalfa yielded a relatively stable, particulate-free, permeates which was consistent in color.

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