EFFECT OF OLIVE LEAVES ADDITION AND WASTEWATER RECYCLING ON THE PRODUCTIVITY AND QUALITY OF OLIVE OIL PRODUCED BY CENTERIFUGATION

Gibriel,, A. Y.; Abd EI-Rahman, H. A.; Ali, F. Abd EI-Razik; Abou-Zaid, F. O.

doi:10.21608/jfds.2002.254149

EFFECT OF OLIVE LEAVES ADDITION AND WASTEWATER RECYCLING ON THE PRODUCTIVITY AND QUALITY OF OLIVE OIL PRODUCED BY CENTERIFUGATION

Document Type : Original Article

Authors

¹ Food Science Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt.

² Agri-Industrialization Unit, Desert Research Center, Cairo, Egypt.

10.21608/jfds.2002.254149

Abstract

Two olive fruit cultivars (Picual and Chemlalli)were used to invesiigaf~ the
effect of olive leaves addition (2% w/w) during crushing process as well as wastewater
recycling (60 U100kg paste) during malaxation process on yield, physicochemical
properties, fatty acid composition and sensory evaluation of oils produced' by
centrifugation. Produced oils after the addition of leaves . were characterized (with
respect to control oils) mostly by: (i) higher polyphenols content (4.2 -5.8%), (ii) similar
values of acidity and peroxide, (iii) Similar contents of saturated and unsaturated fatty
acids, (iv) more preferable taste and (v) categorized as extra virgin olive oil.
Application of wastewater recycling led to increase oil yield by 2.5-3 % and reduce
wastewater. The produced olive oils were characterized (with respect to control oils)
by: (i) higher content of poiyphenols (25%), (ii) similar values of acidity and peroxide,
(iii) Similar contents of saturated and unsaturated fatty acids, (iv) similar organolyptic
properties and (v) categorized as extra virgin olive oil. Therefor, addition of olive
leaves during crushing process and recycling of wastewater during malaxation
process could be recommended by production of extra virgin olive oil.

Keywords