Results and discussions
77
Remaining total suspended
solids (TSS 𝑅 )
Kg/d
2248,609
According to the table 20, that shows the results of dessander and oil remover sizing, the most
essential remarks that we note are that : we opted for a circular stucture, with a quantity of
injected air to remove oil that equals to 1676 m3of air/h, the eliminated mineral solids MSE =
579,731 kg/d and the remaining total suspended solids in the structure equals to 2248,609 kg/d.
1.5.2. Secondary treatment (biological treatment)
1.5.2.1. The proposed secondary treatment method
The proposed secondary treatment method in this study is based on the principle of mediumload microalgae treatment in raceway ponds, the results of calculation of sizing raceway ponds
are listed in the following table.
Table 21: Results of raceway ponds sizing.
Designation
Symbole
unit
Quantity
Raceway pond intended for microalgae cultivation
Number of structures
/
U
1
Volume of raceway pond
V
m
3
254,14
Surface area of raceway
pond
S
m
2
3380
Depth of raceway pond
P
m
0,5
Lenght of raceway pond
L
m
130
Width of raceway pond
W
m
26
Total mass of microalgae
Xa1
Kg
7000
Energy requirement
En
KW
44