%0 Journal Article %A Praepilas Dujjanutat and Pakawadee Kaewkannetra %D 2011 %J International Journal of Environmental and Ecological Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 60, 2011 %T Effects of Wastewater Strength and Salt Stress on Microalgal Biomass Production and Lipid Accumulation %U https://publications.waset.org/pdf/6431 %V 60 %X This work aims to investigate a potential of microalgae for utilizing industrial wastewater as a cheap nutrient for their growth and oil accumulation. Wastewater was collected from the effluent ponds of agro-industrial factories (cassava and ethanol production plants). Only 2 microalgal strains were isolated and identified as Scenedesmus quadricauda and Chlorella sp.. However, only S. quadricauda was selected to cultivate in various wastewater concentrations (10%, 20%, 40%, 60%, 80% and 100%). The highest biomass obtained at 6.6×106 and 6.27×106 cells/ml when 60% wastewater was used in flask and photo-bioreactor. The cultures gave the highest lipid content at 18.58 % and 42.86% in cases of S. quadricauda and S. obliquus. In addition, under salt stress (1.0 M NaCl), S. obliquus demonstrated the highest lipid content at 50% which was much more than the case of no NaCl adding. However, the concentration of NaCl does not affect on lipid accumulation in case of S. quadricauda. %P 832 - 837