新型生态微生物燃料电池中的生物能源产生和氮去除。
Bioenergy generation and nitrogen removal in a novel ecological-microbial fuel cell.
机构信息
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China; School of Environment, Tsinghua University, Beijing, 100084, China.
School of Water and Environment, Chang'an University, Xi'an, 710054, China; Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
出版信息
Chemosphere. 2021 Sep;278:130450. doi: 10.1016/j.chemosphere.2021.130450. Epub 2021 Mar 31.
A novel ecological-microbial fuel cell (E-MFC) was constructed based on the mutualistic symbiosis relationship among wetland plants Ipomoea aquatic, benthic fauna Tubifex tubifex (T. tubifex) and microorganisms. The maximum power densities of sediment MFC (S-MFC), wetland plant MFC (WP-MFC) and E-MFC were 6.80 mW/m, 10.60 mW/m and 15.59 mW/m, respectively. Ipomoea aquatic roots secreted organic matter as electricigens' fuel for electricity generation, while T. tubifex decomposed decaying leaves and roots into soluble organic matter and plant nutrients, forming a co-dependent and mutually beneficial system, which was conducive to bioelectricity production. The E-MFC obtained the highest nitrogen removal, and the removal efficiencies of NH-N and NO-N were 90.4% and 96.5%, respectively. Hydraulic retention time (HRT), cathodic aeration and T. tubifex abundance had significant effects on E-MFC power generation. The performeance boost of E-MFC was closely related to anodic microbial community change caused by the introduction of T. tubifex.
构建了一种基于湿地植物空心菜、底栖动物颤蚓（Tubifex tubifex）和微生物共生关系的新型生态微生物燃料电池（E-MFC）。沉积物微生物燃料电池（S-MFC）、湿地植物微生物燃料电池（WP-MFC）和 E-MFC 的最大功率密度分别为 6.80 mW/m、10.60 mW/m 和 15.59 mW/m。空心菜根系分泌有机物作为发电微生物的燃料进行发电，而颤蚓则将凋落物和根系分解为可溶性有机物和植物养分，形成相互依存、互利共生的系统，有利于生物电能的产生。E-MFC 获得了最高的氮去除率，NH-N 和 NO-N 的去除效率分别达到 90.4%和 96.5%。水力停留时间（HRT）、阴极曝气和颤蚓丰度对 E-MFC 的发电性能有显著影响。E-MFC 的性能提升与引入颤蚓引起的阳极微生物群落变化密切相关。
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