Bioenergy generation and nitrogen removal in a novel ecological-microbial fuel cell
| Autor: | Nianqin Wang, Hongpu Xue, Zhiguang Huang, Dengfei Qiu, Shentan Liu, Xiaojuan Feng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Microbial fuel cell Hydraulic retention time Bioelectric Energy Sources Nitrogen Health Toxicology and Mutagenesis 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Nutrient Electricity Bioenergy Environmental Chemistry Organic matter Electrodes 0105 earth and related environmental sciences chemistry.chemical_classification biology Chemistry Public Health Environmental and Occupational Health General Medicine General Chemistry biology.organism_classification Pollution 020801 environmental engineering Microbial population biology Tubifex tubifex Environmental chemistry Wetlands Denitrification Aeration |
| Zdroj: | Chemosphere. 278 |
| ISSN: | 1879-1298 |
| Popis: | 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/m2, 10.60 mW/m2 and 15.59 mW/m2, 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 NH4+-N and NO3−-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. |
| Databáze: | OpenAIRE |
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