School of Life Sciences, Key Laboratory of Jiangxi Province for Functional Biology and Pollution Control in Red Soil Regions, Jinggangshan University, Ji'an 343009, PR China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China.
Bioresour Technol. 2024 Oct;410:131293. doi: 10.1016/j.biortech.2024.131293. Epub 2024 Aug 15.
Microalgae photobioreactor (PBR) is a kind of efficient wastewater treatment system for nitrogen removal. However, there is still an urgent need for process optimization of PBR. Especially, the synergistic effect and optimization of light and flow state poses a challenge. In this study, the computational fluid dynamics is employed for simulating the optimization of the number and length of the internal baffles, as well as the aeration rate of PBR, which in turn leads to the optimal growth of microalgae and efficient nitrogen removal. After optimization, the Light/Dark cycle of the reactor B is shortened by 51.6 %, and the biomass increases from 0.06 g/L to 3.94 g/L. In addition, the removal rate of NH-N increased by 106.0 % to 1.56 mg L h. This work provides a feasible method for optimizing the design and operational parameters of PBR aiming the engineering application.
微藻光生物反应器（PBR）是一种高效的废水脱氮处理系统。然而，PBR 的工艺优化仍然迫在眉睫。特别是，光和流态的协同作用和优化提出了挑战。在本研究中，采用计算流体动力学模拟优化 PBR 的内部挡板数量和长度，以及曝气率，从而促进微藻的最佳生长和高效脱氮。优化后，反应器 B 的光/暗循环缩短了 51.6%，生物量从 0.06g/L 增加到 3.94g/L。此外，NH-N 的去除率提高了 106.0%，达到 1.56mg L h。这项工作为优化 PBR 的设计和操作参数提供了一种可行的方法，以满足工程应用的需要。
