Microalgae, considering as one of the most promising sources of
biofuels, have caught increasing attention in the context of global
climate change and fossil fuel depletion. Researchers estimate that
algae could yield 61,000 l/ha, compared with 200–450 l from crops
such as soya and canola (Savage, 2011). However, the algal biofuels
nowadays are not economically competitive with petrodiesel.
Many reports have suggested cultivating microalgae with wastewater,
as a means of substituting freshwater and providing nutrients
for algae cultivation (Chinnasamy et al., 2010; Pittman et al.,
2011; Wijffels and Barbosa, 2010). In addition, using wastewater
to cultivate microalgae also offers a combination of biofuels production
with wastewater treatment. To avoid being contaminated
by other microalgae, the wastewaters used for algae cultivation