The circular bioeconomy framework addresses the global transition toward resource-efficient and low-carbon economies. The use of microalgae in sustainable circular bioeconomy largely suffers from energy consumption and underutilization of residual biomass, leading to greenhouse gas (GHG) emissions. This analysis-based perspective reveals that closed loop microalgal wastewater systems reduce GHG emissions by >50% and enhance valorization of residual biomass for value-added products compared to open loop approach. Integrating solar technologies in closed loop system further reduces GHG emissions by 99% and aligns with 11 UN sustainable development goals, making it a suitable model for a zero-waste and low-carbon circular bioeconomy.

循环生物经济框架解决了全球向资源节约型和低碳经济转型的问题。微藻在可持续循环生物经济中的使用在很大程度上受到能源消耗和剩余生物质利用不足的影响，从而导致温室气体 (GHG) 排放。这种基于分析的观点表明，与开环方法相比，闭环微藻废水系统可将温室气体排放量减少 50% 以上，并提高剩余生物质对增值产品的价值。将太阳能技术集成到闭环系统中进一步减少 99% 的温室气体排放，并符合 11 项联合国可持续发展目标，使其成为零废物和低碳循环生物经济的合适模式。