Treatment Plants for Phosphorus Removal from Wastewater
3.0
2.0
1.0
0.2
Cone. of P,gP/m 3
+
+'0 + '
0 + ' .........
0
+ 0
......... .........
+
0
+ 0
......... +
0
il. +
.........
--~
++ 0
+ .........
-------~'
+Total P
o Dissolved P
0~~----------~----------~~------------~~
0 0.2
1.0
2.0
3.0
Molar ratio (mole Fe/mole Tot Pin influent)
Tot-P after filter (gP/m 3 ) (primarily dissolved P)
1.0
0.6
0.2
o~--~--~--~--~--~--~--~~--~--~--~~
1.0
0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Molar ratio (mole Fe/mole Tot Pin influent)
Dissolved P in effluent, gP/m 3
pH= 6.0-6.5
o~------~------~~~--~~--~~~----~~~
0
1.0
2.0
3.0
4.0
5.0
Molar ratio
mole AI (added
mole P (chem. settleable P)
Fig 10.22 Relationship between phosphorus in the effluent and the metallphosphonts molar ratio
for simultaneous precipitation plants.
A: Haslev treatment plant (Denmark) /10/
B: Seholt treatment plant (Denmark) /11/
C: American treatment plant, /9/.
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