Recomendações
Sedimentation tank stilling wallsSettling tank: hydraulic superficial loading rateRectangular section troughConventional settling tank: triangular weirs at the edges of the settled water troughsConventional settling tank: horizontal flow velocityUASB check-list: hydraulic parameters
Caixa de areia para água
Default

Input data

Flow (Q)

Depth (y)

Width (b)

Length (L)

Output data

Q/A

Settling critical velocity (vs)

Horizontal velocity (U)

Description

Calculates grit chamber installations for water intake structures in rivers.

Given the flow and the grit chamber dimensions, calculates the superficial flow rate, the settling critical velocity and the horizontal velocity.

 

Notes:

 

  • According to Brazilian standards, the critical sedimentation velocity must be equal or less than 2.4 cm/s.
  • According to Brazilian standards, the actual lenght of the grit chamber (L) must be equal to the theoretical lenght multiplied by 1.5.
  • According to Brazilian standards, maximum horizontal velocity shall not be greater than 0,30 m/s.

 

Caixa de areia para água

References

  • VIANNA, Marcos R. Hidráulica aplicada às estações de tratamento de água. 6. Ed. Belo Horizonte, 3I, 2019.