Evaluation of Growth Rate and Biomass Productivity of Scenedesmus quadricauda and Chlorella vulgaris under Different LED Wavelengths and Photoperiods

Cultivation has been identified as an essential stage for biofuel production. This research examined two important parameters the industrial production of microalgae, namely microalgae growth rate and biomass productivity. Chlorella vulgaris Scenedesmusquadricauda were cultivated using a closed photobioreactor (PBR). A novel approach cultivation energy input reduction was developed by incorporating periods darkness during cultivation, would happen in nature. Three different LED light sources (white, red, green) used to determine conditions that result highest C. S. quadricauda responded differently lighting conditions. It found that, depending on source period, rates productivities obtained. Overall, experimental results obtained this study indicated white is more effective than green or red LEDs increasing maximum 3.41 d?1 productivity 2.369 g L?1d?1 achieved S.quadricauda under 19 h period alternating with 5 darkness. For 3.49 2.438 continuous no period.