XIONGXin-yi,FUGuo-kai,ZHANGYu-hao,et al.Effect of Cathodic HN-AD Bacteria OTU Number on Start-up of a Single-chamber Microbial Fuel Cell[J].China Water & Wastewater,2024,40(15):36-43.
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Effect of Cathodic HN-AD Bacteria OTU Number on Start-up of a Single-chamber Microbial Fuel Cell

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第15期 Page: 36-43 Column: Date of publication: 2024-08-01
Author(s):
XIONG　Xin-yi1; 2;  FU　Guo-kai1; 2;  ZHANG　Yu-hao3;  LIU Wu-ping4;  ZUO Luo4
（1. College of Environment and Ecology， Chongqing University， Chongqing 400045， China； 2. Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment ， Chongqing University， Chongqing 400045， China； 3. Nanchang Urban Planning & Design Institute Group Co. Ltd.， Nanchang 330038， China； 4. Southwest Municipal Engineering Design & Research Institute of China， Chengdu 610081， China）
Keywords:
high salinity mustard wastewater;  microbial fuel cell;  heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria;  OTU number
Abstract:
A novel approach was developed to acclimate activated sludge from a mustard wastewater treatment plant, resulting in the acquisition of HW1 and HW2 activated sludge with heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria OTU numbers of 1 500 and 7 500. Three sets of experiments (S1, S2 and S3) were conducted with different OTU numbers of HN-AD bacteria (0, 1 500 and 7 500) for high salinity mustard tuber wastewater treatment, and the impact of HN-AD bacteria OTU number of the cathode-inoculated sludge on the power generation and pollutants removal performance during the start-up of a single-chamber microbial fuel cell (MFC) was compared. In the S3 experimental group, the single-chamber MFC exhibited superior nitrogen removal efficiency, with NH4+-N and TN removal rates reaching (90.13±2.55)% and (90.83±1.46)%, respectively, upon completion of electricity generation. The maximum output voltage [(0.497 2±0.033 5) V], the maximum power density (11.59 W/m3), the maximum current density (56.35 A/m3), the power generation period (116 h), and the Coulomb efficiency [(16.27±0.47)%] of the S1 experimental group all exceeded those of S2 and S3. However, the NH4+-N and TN removal rates of the former were only (6.84±1.09)% and (6.20±0.60)%, respectively, which were lower than those of the latter. The HN-AD bacteria OTU number did not exert a significant impact on the COD removal efficiency during start-up of the single-chamber MFC.
Last Update: 2024-08-01