Results and discussions
74
According to table 18, that shows the results of Taoura basic WWTP data for 2050, we note
that for a maximum flow of 9758,88m
3 /d entering the WWTP, the pollutant loads of BOD5 ,
TSS, nitrogen and phosphorus that shold be removed with the proposed wastewater treatment
process must have an effictivness of a purification yield of : 93% ,94%, 82% and 92%
respectively.
1.5. Sizing of wastewater treatment plant structures
1.5.1. Pre-treatment
1.5.1.2. Screen sizing
The calculations results of sizing coarse screen and fine screen are summarized in table 19.
TSS
g/inhab/d
70
Kg/d
2846,34
mg/l
583,332
Purification yield
%
94
Nitrogen
g/inhab/d
20
Kg/d
813,24
mg/l
166,66
Purification yield
%
82
Phosphorus
g/inhab/d
15
Kg/d
609,93
mg/l
125
Purification yield
%
92