tailieunhanh - Ảnh hưởng của điều kiện nuôi cấy đến khả năng sinh trưởng và tích lũy lipid của vi tảo Scenedesmus obliquus

Hiện nay, vi tảo được xem là nguồn nguyên liệu đầy hứa hẹn để sản xuất nhiên liệu sinh học. Sự tích lũy lipid tùy thuộc vào từng loài vi tảo cũng như điều kiện nuôi cấy. Nghiên cứu này nhằm khảo sát ảnh hưởng của nitơ (N) và photpho (P) đến khả năng sinh trưởng và tích lũy lipid của vi tảo Scenedesmus obliquus. | Trường Đại học Nông Lâm TP. Hồ Chí Minh 57 Impact of cultivation conditions on biomass yield and lipid content of Scenedesmus obliquus Huong T. G. Thach Hong T. Tran Anh T. V. Nguyen amp Khang V. Huynh Faculty of Biological Sciences Nong Lam University Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper Microalgae have currently been considered as a promising feedstock for biodiesel production. The accumulation of Received June 14 2023 microalgal lipids is species-specific and largely dependent upon Revised July 07 2023 cultivation conditions. The present study aimed to investigate the Accepted July 17 2023 biomass productivity and lipid content of Scenedesmus obliquus cultivated under nitrogen N - and phosphorus P -depleted Keywords conditions. The highest microalgal density was 106 Culture conditions cell mL after 12 days of cultivation in the standard Bold s Basal Lipids Medium BBM and significantly decreased with decreasing Nitrogen N conentrations in the media with the density of 106 106 106 and 106 cell Phosphorus mL in the nutrient solutions containing 0 25 50 and 75 N Scenedesmus obliquus respectively. Conversely the P concentrations showed negligible Corresponding author effects on the growth of S. obliquus across all treatments. Overall the lipid accumulation of S. obliquus increased with decreasing Huynh Vinh Khang N and P concentrations. The results revealed that N-starvation Email khanghv@ yielded the highest microalgal lipid content of mg g . whereas that under N-sufficient condition was only mg g . Likewise the lipid content was almost double when S. obliquus was grown in the modified BBM containing half of P concentration of the standard medium. Taken together this study demonstrates that alteration of the nutrients is an effective approach for enhancing lipid accumulation in S. obliquus. Cited as Thach H. T. G. Tran H. T. Nguyen A. T. V. amp Huynh K. V. .