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Title: Using Enzymes for Oil Recovery from Edible Seeds
Authors: Kalia, V C
Lal, Sadhana
Gupta, M N
Issue Date: Apr-2001
Publisher: NISCAIR-CSIR, India
Abstract: Oilseeds and their products are the most valuable agricultural crops in the world trade with, ever-increasing demand for oil from edible oilseeds all over the world. India accounts for 9.6 per cent of the world's oilseeds production. The demand for vegetable oils is increasing at 5 lakh t/y while the production is increasing at 2 lakh t/y only. The present demand over supply gap, in edible oils, is 1.8 million t needing to produce additional 5.4 million t oilseeds/y. Hydraulic, and expeller pressing, and solvent extraction are the three most common processes for oil recovery from oil seeds. Enzyme based oilseed processing technologies emerge as one of the most eco-friendly processing methods. The enzymes have specific mode of action, therefore, cellulase, hemicellulase and pectinase and even proteases are the most favourable enzymes for degrading the cell wall in oilseeds to loosen oil sacs embedded in the structures. The enzyme treatment has been found useful in conventional solvent extraction process also. Different factors like temperature, pH, moisture, grinding and size reduction of oilseeds are required by enzymatic processes which influence the efficiency of extraction, recovery of oil, that also helps maintain higher nutritive value. The usage of enzymes reduces environmental pollution with consequent reduction in BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand) of the residues and wastewaters along with reduction in acid development and oxidation during further processing and storage. High cost and specificity of enzymes limit the enzyme usage for different oilseeds.
Page(s): 298-310
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.60(04) [April 2001]

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