High pressure processing and thermal treatment on goat milk's quality.

Narayanan, Sangitha (2018) High pressure processing and thermal treatment on goat milk's quality. [Project Paper] (Submitted)

Text FK 2018 21.pdf Download (55MB)

Abstract

Goat milk spoilage in shorter period of time, an on-going problem of high economy impact to the goat milk industry, is caused by insufficient treatment that exposed to bacterial spoilage. With the increasing demand for high value-added products from goat milk, there is an interest to study non-thermal pasteurization technologies for goat milk; namely High Pressure Processing (HPP). This research investigated goat milk quality processed by thermal treatment and HPP. Quality assessments before and after processing and during storage were carried out for goat milk-colour properties, rheological properties, total soluble solids, pH and microbiological analyses. Room temperature HPP processed goat milk at 600MPa for 10 min resulted in 19% bacterial colonies' reduction compared to thermal treatment after storage period of 1 day. When comparing the same process with milk stored at refrigerated condition, HPP processed goat milk showed lower number of bacterial colonies than thermal processed milk which observed bacterial inactivation as more efficient by a HPP process. Moreover, HPP processed goat milk also retained a stable viscosity and total soluble solids than thermal treated milk which declines during extensive heat treatment and storage period. HPP processed (200MPa, 10 min) of goat milk gives lower total colour difference (TCD) than thermal processed milk at (80°C, 10 min) due to brightness factor and (b*) value that changes according to types of treatment. For processed goat milk, better nutritional preservation and quality was observed from HPP process. HPP processing produced a 30 days' shelf-stable goat milk for usage.

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms Siti Mariam Giman
Date Deposited:	13 Nov 2024 08:09
Last Modified:	13 Nov 2024 08:09
URI:	http://psaspb.upm.edu.my/id/eprint/2229

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