Table 2
Mean values of pH, optical density (OD) at SSOnm and of algal
biomass (total dty weight, in mg I-‘) before dilution of semicontinuous
cultures of Scenedrsmus sp. grown in artificial wastewater with
30 and 50% daily dilutions. The calculated average daily yield is also
indicated, in mgl- d-‘. Standard deviations are in parenthesis.
Significant differences (Student’s t-test) between dilutions arc
indicated by one or hvo asterisks (P < II.05 and 0.01, respectively)