Kajian Perpindahan Massa Ekstraksi Polisakarida pada Biji Asam Jawa dengan Pelarut NaOH

  Tamarind seeds are waste that can be utilized by taking the polysaccharides. This study aims to determine the mass transfer coefficient in the extraction process of tamarind seeds with NaOH solvent. The factors that influence mass transfer are extraction time, size, temperature, stirring speed, and solvent. Tamarind seeds are soaked for 3 hours then boiled and then the seeds are removed and dried. After that 50 grams of tamarind seeds were extracted with NaOH solution with a concentration of 0.1N; 0.2 N; 0.3 N; 0.4 N; 0.5 N with extraction time 15, 30, 45, 60, 75 minutes. Then the filtrate is separated from the residue. The filtrate was obtained by adding 96% ethanol in a ratio of 1: 2 and allowed to stand for 24 hours, separating the solid with the filtrate. The resulting solid was heated at 75oC and the results were analyzed for polysaccharide levels by the Gravimetry method. In this study, the highest mass transfer coefficient (kLa) value obtained at 0.5 N NaOH concentration is 0.01734 / minute. &nbsp