Processing factors affecting the yield and physicochemical properties of starch from cassava chips and flour

Three processing factors, namely, raw materials type (RMT) (i.e. chips and flour) and raw material drying mode (RDM) (i.e. sun- and oven-drying at 55 degreesC) were related to the yield and some physicochemical properties of starch in a 2(3) factorial experiment. The quality characteristics investigated were: moisture content, pH, crude fiber content, peak viscosity and pasting temperature. Starch yields from oven-dried chips and flour were significantly higher (at 5%) than from sun-dried materials. The optimal yield of 55.9 g (per 70 g of dried product or 79.9%) was obtained from oven-dried starch extracted from oven-dried flour. The peak viscosities (PV) of starches extracted from flour and chips were similar while the observed pasting temperatures of flour-extracted starches were not significantly different from those derived from chips.