MODELING OF THE SEPARATION OF PARTICLES NOT RETAINED IN THE STAGE OF SEDIMENTATION ON CHANELS: EXTRACTION PROCESS CASSAVA STARCH

Abstract

On the settling stage in channels of the extraction process of the cassava starch, is generated around 80% of the total wastewater from the process. On this study, we analyze the theoretical modeling of the particles that are not retained in the channels basing on the analyses of settling of discrete particles with sizes between 2 and 8 microns, using the Stockes Law. The theoretical modeling showed that the sedimentation rate is between 0,007 and 0,112 cm/min. With this rate range and a critical flow rate of 1,5 L/s, for the total removal of the particles, it is required a structure with a surface area of 1288 m2 , height of 1 m and approximately 10 days. This study shows that is not economically or technically feasible the conventional nor high settling to retain this type of particles, being advisable to evaluate different mechanisms to improve the separation efficiency of particles that may potentiate their use and to avoid the contamination of the receiving bodies of these effluents

Keywords

• Cassava Rallanderia
• Discretes Particles Settling
• Stain Separation