Home Courses Treatment of Urban Sewage Course materials Lectures 2. Elaboration Question 1

2. Elaboration Question 1

Course subject(s) 2. Primary treatment

QUESTION 1 Headloss

Determine the headloss (hL) across the bar screen if:

  • The screen is clean.
  • If 50% of the screen is blocked.
Parameter Symbol Units Value
Incoming flow velocity v m/s 0.6
Pass-through velocity (for clean screen) V m/s 0.9
Screen cross sectional area Aopen m² 0.19
Friction coefficient for clean screen C – 0.7
Friction coefficient for clogged screen C – 0.6

Elaboration Question 1

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