Physiochemical Properties of Polysaccharides Extracted from Tofu Processing Wastewater |
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| Authors: | T.S. Sonda R.J. Kain H. Yao |
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| Affiliation: | Author Sonda is with the Foreign Students' and Experts' Building–413, Wuxi–214036, Peoples Republic of China.;Author Kain is with the Dept. of Food Resources Development, Foreign Students' and Experts' Building–402, School of Food Science and Technology, Southern Yangtze Univ., Wuxi–214036, P. R. China.;Author Yao is with the School of Food Science and Technology, Southern Yangtze Univ., Wuxi–214036, P. R. China. Direct inquiries to author Sonda (). |
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| Abstract: | ABSTRACT: Yield, gelation, viscosity, emulsifying properties, and sugar composition of polysaccharides extracted from tofu processing wastewater under acidic conditions at different temperature levels and incubation times were determined. Optimum extraction for water-soluble polysaccharides was at pH 1.5 and 100 °C over an incubation period of 6 hours. Extraction ratio (%) and yield of high-molecular-weight polysaccharides were higher at pH ranges of 1.5 to 3.0 with extraction temperatures of 80 to 100 °C. Most water-soluble polysaccharides extracted under strong acidic conditions and above 80 °C remained fluid, while most extracted within the range of 45 to 80 °C gelled. Pure polysaccharides exhibited better emulsifying properties than water-soluble polysaccharides. Apparent viscosities of water-soluble polysaccharides were dependent on sugar concentration. |
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| Keywords: | tofu processing wastewater extration ratio polysaccharides apparent viscosity emulsifying |
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