low of 19 % if the initial concentration is 0.025 mg/L to 42 % if the initial TP

concentration is 0.150 mg/L.


 0.16


 0.14


 0.12


=- 0.1

o.
 0.08
C

0
S 0.06


 0.04


 0.02


 0


- Cin = 0.050
-- Cin = 0.075
--Cin = 0.100
 Cin= 0.125
-- Cin = 0.150


 0 25 50 75 100 125 150
 HRT (days)

Figure 4-20. Effect of Initial Concentration and Residence Time on Outflow TP
 Concentration for the EAASR

Table 4-15. Effect of Initial TP Concentration on TP at 50 Days and Percent Control for
 the EAASR
 Initial TP (mg/L) TP (mg/L) at 50 days % Control
 0.050 0.04 19%
 0.075 0.06 25%
 0.100 0.07 28%
 0.150 0.09 42%


Predicted Performance of STA 3/4 Removal of TP

 The primary differences between the EAASR and STA 3/4 with regard to the


removal Equation 4-3 is that the residence times in the STAs are typically in the range of