Methodology
51
In concentration (mg/l)
[BOD5] =
í µí±©í µí±¶í µí±«í µí¿ í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
í µí±¨í µí²í µí²í µí²í µí²í µí²í µí² í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
Purification yield
The purification yield is given by the following formula:
R=
í µí±ªí µí²−í µí±ªí µí²
í µí±ªí µí²
×100
With :
Ci: BOD5 concentration at plant inlet.
Cf : BOD5 concentration at plant outlet ([BOD5]=30mg/l).
TSS loads
The total suspended solids content per inhabitant per day for a combined sewer
system is 70 g/inhab/day. It is calculated using the following formula:
TSS load = í µí± × 70 ×í µí¿í µí¿
−í µí¿
With :
TSS load : Pollutant load.
N: Number of equivalent inhabitants by 2050.
In concentration (mg/l)
[TSS]=
í µí±·í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí² í µí²í µí² í µí±»í µí±ºí µí±º
í µí±¨í µí²í µí²í µí²í µí²í µí²í µí² í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
Purification yield
The purification yield is given by the following formula:
R=
í µí±ªí µí²−í µí±ªí µí²
í µí±ªí µí²
×100
With:
Ci: TSS concentration at plant inlet.
Cf : TSS concentration at plant outlet ([TSS]=35mg/l).
51
In concentration (mg/l)
[BOD5] =
í µí±©í µí±¶í µí±«í µí¿ í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
í µí±¨í µí²í µí²í µí²í µí²í µí²í µí² í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
Purification yield
The purification yield is given by the following formula:
R=
í µí±ªí µí²−í µí±ªí µí²
í µí±ªí µí²
×100
With :
Ci: BOD5 concentration at plant inlet.
Cf : BOD5 concentration at plant outlet ([BOD5]=30mg/l).
TSS loads
The total suspended solids content per inhabitant per day for a combined sewer
system is 70 g/inhab/day. It is calculated using the following formula:
TSS load = í µí± × 70 ×í µí¿í µí¿
−í µí¿
With :
TSS load : Pollutant load.
N: Number of equivalent inhabitants by 2050.
In concentration (mg/l)
[TSS]=
í µí±·í µí²í µí²í µí²í µí²í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí² í µí²í µí² í µí±»í µí±ºí µí±º
í µí±¨í µí²í µí²í µí²í µí²í µí²í µí² í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí² í µí²í µí²í µí²í µí²
Purification yield
The purification yield is given by the following formula:
R=
í µí±ªí µí²−í µí±ªí µí²
í µí±ªí µí²
×100
With:
Ci: TSS concentration at plant inlet.
Cf : TSS concentration at plant outlet ([TSS]=35mg/l).