Figs. 3. Total phosphorus according to the time. c=
Effluent treated by S. = Effluent treated by PS.
¡= Effluent treated by P. The points are means of
total phosphorus. Vertical bars indicate standard
deviation (±) (n=5). For the sake of clarity, only the
halves of the interval bars have been represented.
Different letters, for the same date, over points
indicate significant differences according to Tukey
test at p