Abstract
The wastewater from PSP starch extraction was then filtered, concentrated in a rotary evaporator at 55°C, and investigated to evaluate its stability which was influenced by pH, light, storage temperature, heat, sugar, and salt concentrations. The results showed that the highest anthocyanin content, antioxidant activity and color stability were found in wastewater extracted from starch using water as an insulating agent for starch. The color of PSP starch wastewater using water as starch isolation agent has good stability for 15 days of storage at dark room temperature, and is stable at pH 3.0 – 9.0, heated at 100°C for 15 minutes, and in a solution of 10-50% and 10-30 % each concentration of sugar and salt.
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