Sun Jingjing, Yang Libin, Xiao Shaoze, Chu Huaqiang, Jiang Shuhong, Yu Zhenjiang, Zhou Xuefei, Zhang Yalei
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Shanghai Institute of pollution control and ecological security, Tongji University, Shanghai 200092, China.
Water Res. 2022 Jun 15;217:118411. doi: 10.1016/j.watres.2022.118411. Epub 2022 Apr 6.
The microalgal wastewater cyclic cultivation technology (AWCT) proposed in this study helps address the challenges surrounding water scarcity and ecological sustainability in a clean, resource-efficient, and affordable manner. A novel microalgae growth model (AGM) elucidating the growth mechanisms of microalgae in the AWCT system was established for dynamic simulations and design optimization. The recycled wastewater accelerated the growth rate of microalgae, and increased biomass and lipids content by 11% and 37.65%, respectively, after 8 batches of cultivation. The accumulated soluble algae products (SAPs) enhanced microalgae growth by providing nutrients and regulating metabolism. In addition, scenario simulations illustrated the excellent long-term performance of the AWCT system. 100% recycling of microalgal wastewater could save 0.3% N and 54.36% P. The techno-economic analysis (TEA) and life cycle assessment (LCA) explored how economic and sustainability principles can be embedded into the life cycle of microalgae production. The AWCT led to outcomes vastly superior to non-cyclic technology by enabling the high-level recovery of resources, providing substantial benefits, enhancing contingency and risk resistance, and offsetting a host of unintended environmental effects.
本研究提出的微藻废水循环培养技术（AWCT）有助于以清洁、资源高效且经济实惠的方式应对围绕水资源短缺和生态可持续性的挑战。建立了一种新颖的微藻生长模型（AGM），以阐明AWCT系统中微藻的生长机制，用于动态模拟和设计优化。经过8批次培养后，循环利用的废水加快了微藻的生长速度，生物量和脂质含量分别增加了11%和37.65%。积累的可溶性藻类产物（SAPs）通过提供营养物质和调节新陈代谢促进了微藻生长。此外，情景模拟表明了AWCT系统出色的长期性能。微藻废水100%循环利用可节省0.3%的氮和54.36%的磷。技术经济分析（TEA）和生命周期评估（LCA）探讨了如何将经济和可持续性原则融入微藻生产的生命周期。通过实现资源的高水平回收、提供显著效益、增强应变能力和抗风险能力以及抵消一系列意想不到的环境影响，AWCT产生的结果大大优于非循环技术。
