The largest SBC in 3rd run, compared to 1st run containing the lowest SBC, caused the increase of the values of lmax and Cmax.
The addition of sodium bicarbonate in the superior level during 7th run leads to obtaining higher values of lmax and
during 8th runs resulted in obtaining higher values of Cmax. However, 5th run, which was accomplished with the
smallest waste concentration and moderate SBC, obtained the maximum Cmax.
Using larger WE concentrations, observed in 7th run and 8th runs, the control of the pH through the sodium bicarbonate buffer is necessary due to the fact that the wastewater causes a decrease of the pH in the medium,
making the micro alga growth unfeasible. It can be predicted that the low WE concentration does not cause pH variations that limit the growth of the micro alga, thus the buffer effect of the bicarbonate is necessary.
However, the statistical analysis revealed that the concentrations of bicarbonate did not significantly affect the variables lmax and Cmax.