文献类型：期刊文献

英文题名：Microalgal cycling in the cathode of microbial fuel cells (MFCs) induced oxygen reduction reaction (ORR) and electricity: A biocatalytic process for clean energy

作者：Sharma, Monika[1,9];Jalalah, Mohammed[2,3];Alsareii, Saeed A.[2,4];Harraz, Farid A.[2,5];Xue, Wu[6,7,8];Thakur, Nandini[1,9];Salama, El-Sayed[9];Li, Xiangkai[1]

第一作者：Sharma, Monika

通信作者：Li, XK[1];Salama, E[2]

机构：[1]Lanzhou Univ, Key Lab Cell Act & Stress Adaptat, Sch Life Sci, MOE, Lanzhou 730000, Gansu, Peoples R China;[2]Najran Univ, Promising Ctr Sensors & Elect Devices PCSED, Adv Mat & Nanores Ctr, POB 1988, Najran 11001, Saudi Arabia;[3]Najran Univ, Coll Engn, Dept Elect Engn, Najran 11001, Saudi Arabia;[4]Najran Univ, Coll Med, Dept Surg, Najran 11001, Saudi Arabia;[5]Najran Univ, Fac Sci & Arts Sharurah, Dept Chem, Sharurah 68342, Saudi Arabia;[6]Lanzhou Univ, Hosp 2, Dept Cardiol, Lanzhou, Peoples R China;[7]Lanzhou Univ, Second Clin Med Coll, Lanzhou, Peoples R China;[8]Gansu Univ Chinese Med, Coll Integrated Tradit Chinese & Western Med, Lanzhou, Peoples R China;[9]Lanzhou Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Lanzhou 730000, Gansu, Peoples R China

第一机构：Lanzhou Univ, Key Lab Cell Act & Stress Adaptat, Sch Life Sci, MOE, Lanzhou 730000, Gansu, Peoples R China

通信机构：[1]corresponding author), Lanzhou Univ, Key Lab Cell Act & Stress Adaptat, Sch Life Sci, MOE, Lanzhou 730000, Gansu, Peoples R China;[2]corresponding author), Lanzhou Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Lanzhou 730000, Gansu, Peoples R China.

年份：2024

卷号：479

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20235015216252);Scopus(收录号：2-s2.0-85179444771);WOS:【SCI-EXPANDED(收录号:WOS:001127246900001)】；

基金：The authors are thankful to the Deanship of Scientific Research at Najran University for funding this work, under the Research Groups Funding program grant code (NU/RG/SERC/12/23) . The authors also thank the Science and Technology Department of Gansu Province (21JR7RA399) , and Cuiying Scientific and Technological Innovation Program of Lanzhou University Second Hospital (CY2021-BJ-A17) , and Gansu Province Science and Technology Planning Project (grant 21YF5WA115) .

语种：英文

外文关键词：Microalgae; Lipidic-waste redox reactions; Electrogenesis; Functional enzymes

摘要：Development in electricity generation technologies is necessary to ensure a safe and sustainable future. Catalytic activity of oxygen reduction reaction (ORR) is still the key challenge in microbial fuel cells (MFCs) which has not improved significantly even upon the application of catalysts. In this study, microalgae as biocatalysts (i.e., availability of electron acceptors and maintain ORR) were applied for spontaneous bioelectricity generation. Microalgal cycling was performed at various concentrations (5, 10, 15, and 20 % vv-1) in the cathode whereas, 2 % fat, oil, and grease (FOG) were added in the anode. Electrochemical and next-generation sequencing (NGS) analyses along with biological parameters were studied to fully understand the anodic and cathodic behavior towards electrogenesis. Continuous microalgal cycling resulted in the highest power density (21.0 mW m-2) and current density (245 mA m-2) in the reactor loaded with 2 % FOG + 15 % vv- 1 microalgae. Electrochemical analysis showed the potential of 2 % FOG + 15 % vv- 1 microalgae via exhibiting Ohmic resistance of 34. 9 ohm and charge transfer resistance of 100 ohm with improved ORR activity. NGS revealed that Clostridium (7-16.5 %), Bacteroidetes (4.54-12.87 %), and Geobacter (6.5-22.7 %) were the dominant species involved in the electron transport mechanism. CoA ligase, acetyl-CoA C-acetyltransferase, and acetate kinase were the major enzymes involved in beta-oxidation and electrogenesis. This study demonstrated the baseline for the use of microalgae as biocatalyst in cathode of MFCs to improve the catalytic efficiency of ORR.