School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China.
School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan, China.
Bioresour Technol. 2023 Sep;384:129352. doi: 10.1016/j.biortech.2023.129352. Epub 2023 Jun 17.
Microalgae cultivation for biodiesel production is promising, but the high demand for nutrients, such as nitrogen and phosphorus, remains a limiting factor. This study investigated effects of struvite, a low-cost nutrient source, on microalgae production under different physiological phases. Changes in element concentrations were determined to characterize the controllable nutrient release properties of struvite. Results showed that nutrient elements could be effectively supplemented by struvite. However, responses of microalgae under different growth stages to struvite varied obviously, achieving the highest biomass (0.53 g/L) and the lowest (0.32 g/L). Moreover, the microalgal lipid production was obviously increased by adding struvite during the growth phase, providing the first evidence that struvite could serve as an alternative buffering nutrient source to culture microalgae. The integration of microalgae cultivation with struvite as a buffering nutrient source provides a novel strategy for high ammonia nitrogen wastewater treatment with microalgae for biodiesel production.
利用微藻生产生物柴油具有广阔的前景，但对氮、磷等营养物质的高需求仍然是一个限制因素。本研究探讨了鸟粪石作为一种低成本的营养源，在不同生理阶段对微藻生产的影响。通过测定元素浓度来表征鸟粪石可控养分释放特性。结果表明，鸟粪石可以有效地补充营养元素。然而，不同生长阶段的微藻对鸟粪石的响应差异明显，最大生物量（0.53g/L）和最小生物量（0.32g/L）。此外，在生长阶段添加鸟粪石可明显提高微藻的油脂产量，这首次证明鸟粪石可用作培养微藻的替代缓冲营养源。将微藻培养与鸟粪石作为缓冲营养源相结合，为利用微藻处理高氨氮废水生产生物柴油提供了一种新策略。
