optimization of olive oil extraction to enhance efficiency and quality

نویسندگان

جلال محمدزاده

عضو هیئت علمی بخش تحقیقات فنی مهندسی مرکز تحقیقات کشاورزی و منابع طبیعی گلستان محمدرضا احمدی

کارشناس ارشد بخش تحقیقات اصلاح و تهیه نهال و بذر مرکز تحقیقات کشاورزی و منابع طبیعی گلستان

چکیده

olive oil is one of the oldest known vegetable oils, ranking sixth in world production. since it is extractedfrom fresh fruit and used without aging, the conditions of oil production are very important. during theextraction of virgin olive oil, the milling and malaxation steps are vital for increasing oil yield and quality.in this study, the effect of milling (single or double), temperature of malaxation (25, 35, 45, 60°c) andduration of malaxation (15, 30, 45, 60min) on yield and quality (acidity, peroxide index, color, carbonylvalues) of virgin olive oils (cultivar roghani) were investigated. the results showed that double millingincreased oil yield, but that the type of milling had no significant effect on oil quality. increasingtemperature and duration of malaxation increased oil yield, however oil production increased substantiallyup to 35°c and 45 min but did not show a significant difference after that point. an examination of thequalitative characteristics of oil showed that, under the conditions tested, there was no significantdifference in quality. the oil produced was of the highest quality. it was concluded that the optimalextraction method for the production of good quality oil with a satisfactory yield is to employ doublemilling with malaxation for 45 min at 35°c.

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تحقیقات مهندسی کشاورزی

جلد ۹، شماره ۲، صفحات ۱۱۳-۱۲۶

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