P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India.
P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India.
Bioresour Technol. 2019 Aug;285:121349. doi: 10.1016/j.biortech.2019.121349. Epub 2019 Apr 13.
This work studied eco-electrogenic treatment of real dyestuff wastewater along with characterization of electrode-enriched microbial community structures in Fimbristylis dichotoma planted closed-circuit constructed wetland-microbial fuel cell (CW-MFC) system. The CW-MFC-2 (experimental system) achieved 82.2 ± 1.7% ADMI removal and 70 ± 2% COD reduction; that were found to be 9% and 7.4% higher than the standalone constructed wetland (CW) system (bioremediation control) respectively. Likewise, the CW-MFC-2 system achieved maximum power density of 198.8 mW/m, which was 85.6 ± 2.47% higher than the CW-MFC-1 system (eco-electricity control). Quantitative reverse transcription PCR (qRT-PCR) assays revealed significant down-regulation of hepatic oxidative stress response biomarker genes in Oreochromis niloticus exposed to CW-MFC-2 system treated dyestuff wastewater as compared with untreated wastewater. The biofilms associated with the anode and cathode of the CW-MFC-2 system exhibited selective enrichment of electrochemically active and dye degrading microbial communities.
本研究采用香蒲（Fimbristylis dichotoma）种植封闭式人工湿地-微生物燃料电池（CW-MFC）系统，对实际染料废水进行了电生物处理，并对电极富集微生物群落结构进行了特征分析。CW-MFC-2（实验组）实现了 82.2±1.7%的 ADMI 去除率和 70±2%的 COD 削减率；与独立的人工湿地（CW）系统（生物修复对照）相比，分别提高了 9%和 7.4%。同样，CW-MFC-2 系统实现了 198.8mW/m 的最大功率密度，比 CW-MFC-1 系统（生态电能控制）高 85.6±2.47%。定量实时聚合酶链反应（qRT-PCR）检测显示，与未处理废水相比，暴露于 CW-MFC-2 系统处理染料废水中的尼罗罗非鱼的肝氧化应激反应生物标志物基因显著下调。CW-MFC-2 系统的阳极和阴极生物膜表现出对电化学活性和染料降解微生物群落的选择性富集。
