Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 4700 King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Bioresour Technol. 2020 Aug;309:123348. doi: 10.1016/j.biortech.2020.123348. Epub 2020 Apr 8.
Coupling algal biomass growth to wastewater treatment is a promising alternative for the simultaneous removal and recovery of nutrients. This study aims to evaluate the effects of the Hydraulic Retention Time (HRT) on the fouling behavior and biomass characteristics of C. Vulgaris in a Membrane Photobioreactor (MPBR), fed with a secondary synthetic wastewater effluent. The changes in the algal cell characteristics and in their metabolic products were assessed at three different HRTs (12 h, 24 h and 36 h). Experimental results showed that higher loading rates led to a broader Particle Size Distribution (PSD) resulting from looser and less stable algal flocs. In contrast, bigger and homogeneously distributed particles observed at lower loading rates, led to a porous layer with lower fouling rates and organic removal. The presence of smaller particles and dissolved organics resulted in a more compact and less porous layer that increased the removal of small-MW organics.
将藻类生物质生长与废水处理相结合，是一种很有前途的方法，可以同时去除和回收营养物质。本研究旨在评估水力停留时间（HRT）对在膜生物反应器（MPBR）中用二级合成废水处理的 C. vulgaris 的结垢行为和生物质特性的影响。在三种不同的 HRT（12 h、24 h 和 36 h）下，评估了藻类细胞特性及其代谢产物的变化。实验结果表明，较高的负荷率导致更宽的颗粒尺寸分布（PSD），这是由于藻类絮体更松散和不稳定。相比之下，在较低的负荷率下观察到更大和更均匀分布的颗粒，导致具有较低结垢率和有机物去除率的多孔层。较小颗粒和溶解有机物的存在导致更致密和更少孔的层，从而增加了对小分子有机物的去除。
