1. IV. Wastewater Treatment Technologies Topic IV. 7
IV. Wastewater Treatment Technologies Topic IV. 7. Mechanical Wastewater Treatment Facilities - Bar Racks, Grit Chambers, Settling Tanks: Kinds, Structures, Basic Parameters Bar Racks Kinds:
Coarse (b = mm)
Fine (b = mm)
Vertical
Declined
Hand-cleaned
Mechanically-cleaned
Fixed
Removable
Rotating
Disk
Drum
Wing
Comminutors

2. Bar Racks: Kinds

3. Declined Mechanically-cleaned Bar Rack
Bar Racks: Structures
Declined Mechanically-cleaned Bar Rack

4. Bar Rack Accommodation
Bar Racks: Structures
Bar Rack Accommodation

5. Bar Racks: Basic Parameters
a) design scheme б) bars cross sections

6. Grit Chambers: Kinds Horizontal Vertical Tangential Single
Classical
Circular
Aerated
Vertical
Tangential
Single
Combined with grease separating chamber
Mechanically-cleaned
Hydraulically-cleaned

7. Grit Chambers: Structures
Classical Horizontal Grit Chamber

8. Grit Chambers: Structures
Horizontal Circular Grit Chamber

9. Grit Chambers: Structures
Horizontal Aerated Grit Chamber

10. Grit Chambers: Basic Parameters
Velocities Diagram for the Horizontal Aerated Grit Chamber

11. Settling Tanks: Kinds I. According to their technological functions
Primary settling tanks
Secondary clarifiers
II. According to their construction
Horizontal
Radial
Vertical
Combined with other technological units
Imhoff tanks
Aerated tanks/secondary clarifiers

12. Settling Tanks: Structures
Horizontal Settling Tank

13. Settling Tanks: Structures
Details of Horizontal Settling Tanks Inlets and Outlets

14. Settling Tanks: Structures
Radial Settling Tank

15. Settling Tanks: Structures
Vertical Settling Tank

16. Settling Tanks: Structures
Imhoff Tank

17. Settling Tanks: Basic Parameters Settling Kinetics