Potential food development from different parts of sweet potato plant

Zakaria, Nur Zuriati (2019) Potential food development from different parts of sweet potato plant. [Project Paper] (Submitted)

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Abstract

Sweet potato (Ipomoea batatas (L.) Lam.). a hardy, nutritious staple food crop that grown throughout the humid subtropical and tropical regions of the world. Different parts of sweet potato plant my offer various benefits, but there is a lack of understanding of the properties of its parts particularly to link to potential food development exploration. This study focused on establishing characteristic properties of the sweet potato plant parts including the leaves, stems, tuber and peels in a powder as a potential source for animal feed production. The analyses were done using thermogravimetric analysis (TGA) to determine the cell wall structure which are hemicellulose, cellulose and liginin, as well as proximate analysis including the measurement of the dry matter, moisture content, crude fiber, crude protein, fat, ash and carbohydrate. Based on the determined characteristics properties, an effort has been done to investigate the potential of the sweet potato plant parts to be marketed as a technical-grade powder for the formulation of animal feed by performing a flowability analysis of the powder properties i.e. cohesion test, caking test, and powder flow speed dependency (PFSD) test. Besides, this study also has investigated the potential of producing animal feed pallet from the underutilized leaves and stems of sweet potato plant through a compaction process. The pallets were formulated at a ratio of 1:1 of leaves: stems at a different moisture content of 40%, 45%, 50%, 55%, 60%. The produced pallets were tested in terms of their friability, bulk density, true density, porosity and tensile strength. The findings showed that the sweet potato plant parts, particularly the leaves and stems, contained appreciable nutritional substances, particularly protein content and perishable amount of fat, which is suitable for animal feed production. The powders of sweet potato stem, leaves, tube and skin can be classified as stable powders and free-flowing based on the findings in the flowability analysis. Based on the analysis of the produced pallets, difference physical characteristics have been exhibited by the pellets of different moisture content ranging from 40% to 60%. This study found that the best moisture content formulation for the production of sweet potato leaves and stems pellets is at 60% since it exhibited the lowest friability (0.30%), the lowest bulk density (629.5 kg/m³), the highest porosity (56.51%) and the highest work of compression (303.79 kg.s) as well as high tensile strength compared to other moisture contents formulation of the SPLS pellets.

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms. AZLINA ZAINAL ABIDIN
Date Deposited:	21 Nov 2024 01:38
Last Modified:	21 Nov 2024 01:38
URI:	http://psaspb.upm.edu.my/id/eprint/2218

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