Degradasi Onggok Limbah Tapioka menjadi Gula Pereduksi Menggunakan Proses Sonikasi

Abstract

One of the solid waste of tapioca industry, cassava pulp (onggok), is carbohydrate source that can be degraded into reducing sugars. This degradation can be done because cassava pulp having 65.5% starch, and 8.1% cellulose (dry weight basis). The degradation method that used in this study is sonication process to obtain H and OH radicals to attack glicosidic bond of starch and cellulose. The aim of this research is to study the effect of reaction time of sonication process to the product of sonication process and cassava pulp morphology change. The suspension of cassava pulp in water (1/20 w/v) was firstly heated up to 40˚C continued by sonication process for 0 to 90 minutes. Sonication process could break polysaccharide chains as shown by increasing concentration of reducing sugars with reaction time. Furthermore, the morphology of native and sonicated cassava pulp showed that the starch granule can be liberated from fibrous matrix of cassava pulp after sonication.