Treatment Plant Design Criteria Flashcards
What is the detention time for a flash mixer?
Not to exceed 30 Seconds
What is the detention time for Flocculation?
At least 30 mins w/ 45 mins recommended
What is the minimum detention time for Sedimentation?
4 hours for conventional, 3 hours for iron removal, 1 hour if tube settlers are used.
What types of filters are approved by TDEC?
Gravity and pressure.
Can you use pressure filters for surface water treatment?
No, or for lime softening plants.
How many chlorinators do you have to have?
2
How often does the air in a Chlorine room have to change?
Once per minute.
Where is the air outlet for a chlorine room?
Near the floor.
Where is the air inlet for a chlorine room?
Near the ceiling.
What is the best method to check for small chlorine leaks?
A chlorine detector.
What can you use to check chlorine cylinders for leakage?
26 baume ammonium hydroxide
