This document discusses the production of cassava starch in Colombia. It evaluates the sedimentation process used in channels to separate the starch. Two main components were analyzed: the change in concentration of slurry entering the settling zone, and the particle size distribution within the zone. It was found that the slurry concentration during processing was typically between 0.1-6%, and discrete particles settled efficiently. Larger particles over 10 micrometers were retained in the first 104 meters of the channel, while particles from 6.7-8.8 micrometers were discharged and caused environmental issues.

1. LAURA DE LEON RAMIREZ
11-2JM
Doc: Marina Viana
Cassava starch separation: Evaluation of
sedimentation by gravity in channels

2. The produccion of starch of yucca in colombia. Due to
the fact that the setting process determines the
capacity of the starch industry.

3. Wich are generally used in the region. Two main
components were evaluated: determination of the change
in the concetration of the slurry entering the settling zone
and determination of the particle size distribution in the
setting zone. In relation to the affluent of the channels , it
was found that the concetration of the slurry during
strainer operation was between 0.1 to 6% most of the time;
the settling of discrete particles.

4. Two main components were evaluated:
determination of the change in the concentration
of the slurry entering the setting zone and
determination of the particle size distribution in
the setting zone.

5. In relation to the affluent of the clannels, it was found
that concentration of the slurry during strainer
operation was between 0.1 to 6% most of the time; the
setting of discrete particles, for wich the stokes law
may be applied predominate.

6. During the setting process, the flow varied between
0,82 to 1,44 l/s with a predominance of laminar flow
and a hydraulic retention time greater than 150
minutes.
In the first 104m of the channel, particles greater than
10pm in size were efficiently retained; particles
between 6,7 to 8,8 pm were not retained and were
discharged into local bodies of water, generating
enviromental problems.