Vinnie, Ang Jia Wen
(2020)
Comparison On Composition And Physical
Properties Of Dried Locust (Locusta
Migratoria Manilensis) Powder From
Different Sources.
Project Report.
Universiti Sains Malaysia.
(Submitted)
Abstract
Current conventional livestock are no longer sufficient for human consumption in the
future due to the increase food demand as global population increasing. Entomophagy
could be an alternative protein source with high nutrient composition. Locust (Locusta
migratoria manilensis) has the potential with high protein content and qualified as ‘Halal’
that meets Muslim market. The aim of the study is to investigate the differences in
proximate composition and physical properties between dried locust powder from two
different sources. Both locust powders undergone proximate analysis, colour evaluation,
bulk density, tapped density, flowability and compressibility index. Significant difference
(p<0.05) in nutritional composition of locust powder from different sources whereby
protein content for sample 1 and 2 were 81.4 and 39.7% respectively whereas 6.0 and
23.4% respectively for fat content due to different growth stage of locust. Significant
difference (p<0.05) in colour analysis whereby sample 2 had lower lightness and
yellowness than sample 1 due to high microwave drying temperature applied in sample 2.
Sample 1 had significant (p<0.05) lower bulk and tapped density than sample 2 due to
porous structure after freeze-drying treated in sample 1. Both samples were determined as
poor flow powder based on flowability and compressibility index due to fine particle size
and high moisture content. The study revealed different sample sources do impact on the
composition, colour, bulk and tapped of locust powder. Limitation of this study was using
different source of locust with different growth stage which resulting in unable to
determine the effect of drying method on nutritional composition of locust powder.
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