1. III. Water Treatment Topic III. 4
III. Water Treatment Topic III.4. Upflow Sludge Blanket Clarifiers: Processes and Facilities
Processes:
I. Particularities
Applying of contact coagulation
Flocullation chamber don’t needed
II. Advantages
Higher rate of coagulation
Deeper process of coagulation
Less coagulant quantity needed
Negligible temperature impact
III. Disadvantages
More sludge production
Not applicable for SS > 2500 mg/l

2. Upflow Sludge Blanket Clarifying Processes
Basic Parameters
Suspended solids Upflow velocity Distribution coefficient
mg/l mm/s
< ,5 - 1,6 0,95
,6 - 1,8 0,90
,8 - 2,0 0,85
,0 - 2,2 0,75
,2 - 2, ,70

3. Upflow Sludge Blanket Clarifiers
Corridor Type
1 - perforated coarse water
distribution pipes
2 - sludge blanket
3 - sludge overflow orifices
4 - sludge thickening zone
5 - water clarifying zone
6 - channels for clarified water
7 - collector for clarified water
8 - sludge withdrawing pipes

4. Upflow Sludge Blanket Clarifiers
Circular Type
1 - inflow channel; 2 - air release chamber; 3 - inlet water pipes; 4 - perforated water distribution pipes; 5 - protecting shields; 6 - sludge blanket; 7 - lamellas; 8 - water clarifying zone; 9 - perforated outlet pipes for clarified water; 10 - collecting channel