Formulasi Sari Kedelai Fermentasi (Soygurt) dengan Penambahan Susu Skim dan Pengamatan Sifat Fisikokima Selama Penyimpanan

Abstract

Soygurt is a fermented soybean product which be processed using Lactobacillus bulgaricus and Streptococcus thermophilus, which also be used in yoghurt processing. The objectives of this research are to determine the effect of skim milk addition to the consumer acceptance (using hedonic test), and physicochemical properties of the product (viscosity, pH value, total titrable acid), and the changing of physicochemical properties during storage. This research consisted of two stages. The first stage was determining the concentration of skim milk to the consumer acceptance and physicochemical properties analysis. The next stage was the production of soygurt using the chosen formula and analyze its physicochemical properties during 14 days of storage at 4-8 0C. The optimum concentration determined from this research with significance level 5% was 5% of skim milk (w/v) with the value of the viscosity 376.25 cP, pH 3.62, and total titrable acid 0.73% of lactic acid. During the storage there were changing of in viscosity value, pH, and total titrable acid, the viscosity increased from 235.00 to 485.00 cP, pH decreased from 3.64 to 3.43, and total titrable acid increased from 0.76 to 0.94% of lactic acid.