Results and discussions
76
According to table 19, that shows the results of screen sizing, we note that the screen which we
need during the pre-treatment are : an automatic coarse screen and two fine screen one is
automatic and the other is manual.
1.5.1.3. Dessander and oil remover sizing
The dessander and oil remover calculation results are mentioned in the tables 20.
Table 20: Results of dessander and oil remover sizing.
Designation
Unit
Quantity
Dessander and oil remover
Type of structure
/
Circular
Totale area surface (S)
m
2
23
Radius (r)
m
3
Volume (V)
m
3
92
Height(H)
m
4
Dwell time in rainy weather
( í µí² í µí² )
min
4,94
The quantity of injected air
m
3 of air/h
1676
The total mineral solids (MS í µí± )
Kg/d
853,902
Eliminated mineral solids
(MS E )
Kg/d
579,731
Remaining mineral solids
( MS í µí± )
Kg/d
256,171
The total volatile suspended
solids ( VSS T )
Kg/d
1992,438
76
According to table 19, that shows the results of screen sizing, we note that the screen which we
need during the pre-treatment are : an automatic coarse screen and two fine screen one is
automatic and the other is manual.
1.5.1.3. Dessander and oil remover sizing
The dessander and oil remover calculation results are mentioned in the tables 20.
Table 20: Results of dessander and oil remover sizing.
Designation
Unit
Quantity
Dessander and oil remover
Type of structure
/
Circular
Totale area surface (S)
m
2
23
Radius (r)
m
3
Volume (V)
m
3
92
Height(H)
m
4
Dwell time in rainy weather
( í µí² í µí² )
min
4,94
The quantity of injected air
m
3 of air/h
1676
The total mineral solids (MS í µí± )
Kg/d
853,902
Eliminated mineral solids
(MS E )
Kg/d
579,731
Remaining mineral solids
( MS í µí± )
Kg/d
256,171
The total volatile suspended
solids ( VSS T )
Kg/d
1992,438