Gao Feng, Yang Zi-Yan, Zhao Qiao-Ling, Chen Dong-Zhi, Li Chen, Liu Mei, Yang Jin-Sheng, Liu Jun-Zhi, Ge Ya-Ming, Chen Jian-Meng
Department of Environmental Science and Engineering, School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China.
Zhoushan Institute for Food and Drug Control, Zhoushan 316021, China.
Bioresour Technol. 2021 Oct;337:125457. doi: 10.1016/j.biortech.2021.125457. Epub 2021 Jun 24.
This study investigated the possibility of coupling anaerobic hydrolysis in an anaerobic membrane bioreactor (AnMBR) with mixotrophic microalgae cultivation in a membrane photobioreactor (MPBR) for the sustainable treatment of municipal wastewater. Using the hydrolyzed wastewater discharged from AnMBR, Chlorella pyrenoidosa in MPBR grew in a mixotrophic mode and realized rapid growth. During the stable operation, MPBR achieved average carbon capture rate of 42.82 mg L d and algal lipid production rate of 19.66 mg L d. The average reduction in TN, TP, and TOC during stable operation was 96.7%, 98.0%, and 95.9%, respectively. Mass balance analysis showed that the overall system captured 14.76 mg of carbon from the atmosphere per liter of wastewater treated. Therefore, this AnMBR-MPBR hybrid system simultaneously realized advanced treatment of municipal wastewater, efficient production of algal lipid, and carbon capture from atmosphere, and thus has a good potential in the sustainable treatment of municipal wastewater.
本研究探讨了在厌氧膜生物反应器（AnMBR）中耦合厌氧水解与在膜光生物反应器（MPBR）中进行混合营养微藻培养以实现城市污水可持续处理的可能性。利用AnMBR排放的水解废水，MPBR中的小球藻以混合营养模式生长并实现了快速生长。在稳定运行期间，MPBR的平均碳捕获率为42.82 mg L d，藻类脂质生产率为19.66 mg L d。稳定运行期间TN、TP和TOC的平均降低率分别为96.7%、98.0%和95.9%。质量平衡分析表明，每处理一升废水，整个系统从大气中捕获14.76 mg碳。因此，这种AnMBR-MPBR混合系统同时实现了城市污水的深度处理、藻类脂质的高效生产以及从大气中捕获碳，因而在城市污水的可持续处理方面具有良好潜力。
