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III. Water Treatment Topic III.4. Upflow Sludge Blanket Clarifiers: Processes and Facilities

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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

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iii water treatment topic iii 4 upflow sludge blanket clarifiers processes and facilities
III. Water TreatmentTopicIII.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
upflow sludge blanket clarifying processes
Upflow Sludge Blanket Clarifying Processes

Basic Parameters

Suspended solids Upflow velocity Distribution coefficient

mg/l mm/s -

< 50 1,5 - 1,6 0,95

50 - 100 1,6 - 1,8 0,90

100 -500 1,8 - 2,0 0,85

500 - 1000 2,0 - 2,2 0,75

1000 - 2000 2,2 - 2,5 0,70

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

Upflow Sludge Blanket Clarifiers
upflow sludge blanket clarifiers1
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

Upflow Sludge Blanket Clarifiers