Growth and Purifying Capacity Study of the Green Microalgae in Closed System using Wastewater

Municipal wastewater (MWW) provides a high potential platform for Microalgae cultivation owing to its abundant load of essential nutrients. Extensive researches have demonstrated the performance properties of the green microalgae to grow and remove different types of pollutants from wastewater; in an ecological and at low-cost manner. Within this framework, MWW was used as growth medium for evaluating the growth parameters and nutrients and COD removal of a green microalgae. Experiments were conducted in closed system (photobioreactors) under batch mode within 10 days. As results, high specific growth rate of  0.55 day^-1 was achieved, as well as cell density and biomass concentration obtained at the stationary phase were; 6.06 10⁷ cells\mL and 1.2 g\L, respectively. Final pollutants concentration were reduced to be less than the limit imposed by standard regulation.