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Abstract: Cassava Starch Separation 
Background: 
The production of the cassava starch in Colombia comes 
mainly from the nothern region of the Cauca 
Departament in small agricultural industries know as 
“rallanderias”, in wichi the settling of the slurry accurs in 
channels.
Purpose and focus 
It is important to evaluate the 
sedimentation process performed in 
rectangular channels (0.3 high; 0.4 
wide; 165 m long), wich are generally 
used in the region.
Methods 
Two main components were evaluated: 
determination of the change in the 
concentration of the slurry entering the 
settling zone and determination of the particle 
size distribution in the settling zone.
Results 
It was found that the concentracion of the 
slurry during strainer operation was between 
0.1 to 6% most of the time; the settling of 
discrete particles, for wich to Stokes Law may 
be applied, predominated.
Conclusions 
Particles between 6.7 to 8.8 um were not 
retained and were discharged into local bodies 
of water, generating environmental problems
Sexual Risk in adolescents dependin on the age of sexual debut 
Background 
In Spain young people have their first sexual intercourse at an 
earlier age than in other countries. 
Purpose and focus 
Sexual practices and methods of protection are analyzed 
depending on the age of sexual debut among spanis 
adolescents who are sexually experienced. The mean age was 
15,9 years.
Methods 
The early sexual debut group reported further 
mutual masturbation, original intercourse 
and oral sex with a higher number of sexual 
patners than the rest.
Results 
Sexual debut before 15 years old was 
associated with increased risk of sexual 
infections, deficit in condom use and 
increased sexual expore. 
Conclusions 
The findings of this estudy suggest that the 
age of sexual debut has implication for the 
sexual health in young people.

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Victor

  • 1.
  • 2. Abstract: Cassava Starch Separation Background: The production of the cassava starch in Colombia comes mainly from the nothern region of the Cauca Departament in small agricultural industries know as “rallanderias”, in wichi the settling of the slurry accurs in channels.
  • 3. Purpose and focus It is important to evaluate the sedimentation process performed in rectangular channels (0.3 high; 0.4 wide; 165 m long), wich are generally used in the region.
  • 4. Methods Two main components were evaluated: determination of the change in the concentration of the slurry entering the settling zone and determination of the particle size distribution in the settling zone.
  • 5. Results It was found that the concentracion of the slurry during strainer operation was between 0.1 to 6% most of the time; the settling of discrete particles, for wich to Stokes Law may be applied, predominated.
  • 6. Conclusions Particles between 6.7 to 8.8 um were not retained and were discharged into local bodies of water, generating environmental problems
  • 7. Sexual Risk in adolescents dependin on the age of sexual debut Background In Spain young people have their first sexual intercourse at an earlier age than in other countries. Purpose and focus Sexual practices and methods of protection are analyzed depending on the age of sexual debut among spanis adolescents who are sexually experienced. The mean age was 15,9 years.
  • 8. Methods The early sexual debut group reported further mutual masturbation, original intercourse and oral sex with a higher number of sexual patners than the rest.
  • 9. Results Sexual debut before 15 years old was associated with increased risk of sexual infections, deficit in condom use and increased sexual expore. Conclusions The findings of this estudy suggest that the age of sexual debut has implication for the sexual health in young people.