Abstract
In this study, Botryococcus sp. was used to bio-remediate domestic wastewater for nutrient removal coupled with biomass production. The experiment was set up to investigate the effect of indoor and outdoor culture conditions on the efficiency of phycoremediation and potential biomass productivity, as influenced by different concentrations. The results showed that the concentration of 106 cell/mL successfully removes TP and TOC under an indoor condition at the highest efficiency of 95.4% and 85%, respectively. In addition, there was complete removal (100%) of TN in the domestic wastewater under outdoor conditions. Furthermore, most of the pseudo-first-order kinetic model for the removal of TP, TN, and TOC showed a decreasing pattern proportionate to the increase in phycoremediation time. The highest biomass productivity was also obtained at the same concentration (106 cell/mL) for the outdoor (2.6×105 cell/mL/d) and indoor (2.4×105 cell/mL/d) culture conditions. The outdoor condition provided the highest (p<0.05) biomass productivity. The results of this study suggest that microalgae biomass production combined with domestic wastewater phycoremediation is a sustainable method.
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