As shown in Table 8, due to the impurities contained in the
crude glycerol, the ‘‘real’’ glycerol concentrations were about
15% lower than the corresponding crude glycerol levels. The
cell dry weight and biomass productivity were at high levels
when crude glycerol was within the range from 75 to 100 g/L,
with algal growth being inhibited when the crude glycerol
concentration exceeded 100 g/L. Within the glycerol range
investigated, DHA content was relatively stable, while DHA
yield and productivity had a similar trend as that of cell dry
weight.