Hindered settling Flashcards
1
Q
Rate of settling in hindered settling region is a function of
A
concentration of solid
Characteristic of solid (clay or flocc)
2
Q
what is Cu
A
underflow concentration ( concentration of sludge that I want to design at).
3
Q
what is Hu
A
Height of interface at which I will get such concentration
4
Q
what is tu
A
time at which I will get the underflow concentration
5
Q
C2
A
critical concentration (concentration at which I will get more compaction than hindered settling)
6
Q
t2
A
the time at which I will get C2 (critical concentration
7
Q
H2
A
height of interface at which I will get C2
8
Q
The final overflow rate selected be based on the following factors
A
area needed for clarification
area needed for thickening
rate of sludge withdrawal
9
Q
Area required for thickening is equal to
A
A= Q*(tu/Ho)
