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Enhanced denitrification and power generation of municipal wastewater treatment plants (WWTPs) effluents with biomass in microbial fuel cell coupled with constructed wetland.
Sci Total Environ. 2020 Mar 20; 709:136159.ST

Abstract

A microbial fuel cell-constructed wetland (MFC-CW) with water hyacinth is established to remove the nitrogen and organics from municipal wastewater treatment plants (WWTPs) effluents. Because insufficient carbon sources in influent might decrease pollutants removal efficiency and electricity generation, this research aimed to select high-quality and low-cost biomass as additional carbon source to improve the performance of MFC-CW. Cellulose and hemicellulose (xylan) were chosen as the biomass. Results indicated that xylan displayed a higher nitrate removal (above 92%) compared with cellulose (10.9%). With xylan as carbon source, the anode packing removed nitrate above 80%, while the cathode packing only removed around 50%. With glucose as sole carbon source, the maximum total nitrogen (TN) removal of MFC-CW was 87.66 ± 4.23%, which was higher than that of MFC (85.58 ± 4.14%). The chemical oxygen demand (COD) and TN in the effluent of MFC-CW were maintained below 25 mg/L and 1.5 mg/L, respectively, with the COD/TN ratio around 5.4 and hydraulic retention time (HRT) at 48 h. The TN removal reached the maximum efficiency of 88.78 ± 3.98% when glucose and xylan ratio was in 40%:60% as composite carbon sources, and COD and TN in the effluent were below 20 mg/L and 1.5 mg/L, respectively. In addition, xylan as the additional carbon source significantly promoted the power density compared with sole glucose. Microbial community diversity in the MFC-CW was significantly higher than that in the single MFC or CW. Proteobacteria and Cyanobacteria_norank were relatively more dominant in the MFC-CW than those in the single MFC or CW, which accounted for high nitrogen removal and power generation. Findings in this study proved that MFC-CW with biomass addition enhanced nitrogen removal and power generation.

Authors+Show Affiliations

College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.Nanjing Municipal Design and Research Institute Co., Ltd., Nanjing 210008, China.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: zqjing@njfu.edu.cn.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31887514

Citation

Tao, Mengni, et al. "Enhanced Denitrification and Power Generation of Municipal Wastewater Treatment Plants (WWTPs) Effluents With Biomass in Microbial Fuel Cell Coupled With Constructed Wetland." The Science of the Total Environment, vol. 709, 2020, p. 136159.
Tao M, Guan L, Jing Z, et al. Enhanced denitrification and power generation of municipal wastewater treatment plants (WWTPs) effluents with biomass in microbial fuel cell coupled with constructed wetland. Sci Total Environ. 2020;709:136159.
Tao, M., Guan, L., Jing, Z., Tao, Z., Wang, Y., Luo, H., & Wang, Y. (2020). Enhanced denitrification and power generation of municipal wastewater treatment plants (WWTPs) effluents with biomass in microbial fuel cell coupled with constructed wetland. The Science of the Total Environment, 709, 136159. https://doi.org/10.1016/j.scitotenv.2019.136159
Tao M, et al. Enhanced Denitrification and Power Generation of Municipal Wastewater Treatment Plants (WWTPs) Effluents With Biomass in Microbial Fuel Cell Coupled With Constructed Wetland. Sci Total Environ. 2020 Mar 20;709:136159. PubMed PMID: 31887514.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced denitrification and power generation of municipal wastewater treatment plants (WWTPs) effluents with biomass in microbial fuel cell coupled with constructed wetland. AU - Tao,Mengni, AU - Guan,Lin, AU - Jing,Zhaoqian, AU - Tao,Zhengkai, AU - Wang,Yue, AU - Luo,Hui, AU - Wang,Yin, Y1 - 2019/12/17/ PY - 2019/07/18/received PY - 2019/12/12/revised PY - 2019/12/14/accepted PY - 2019/12/31/pubmed PY - 2020/4/25/medline PY - 2019/12/31/entrez KW - Bioelectricity generation KW - Biomass KW - Composite carbon sources KW - Microbial community KW - Nitrogen removal SP - 136159 EP - 136159 JF - The Science of the total environment JO - Sci. Total Environ. VL - 709 N2 - A microbial fuel cell-constructed wetland (MFC-CW) with water hyacinth is established to remove the nitrogen and organics from municipal wastewater treatment plants (WWTPs) effluents. Because insufficient carbon sources in influent might decrease pollutants removal efficiency and electricity generation, this research aimed to select high-quality and low-cost biomass as additional carbon source to improve the performance of MFC-CW. Cellulose and hemicellulose (xylan) were chosen as the biomass. Results indicated that xylan displayed a higher nitrate removal (above 92%) compared with cellulose (10.9%). With xylan as carbon source, the anode packing removed nitrate above 80%, while the cathode packing only removed around 50%. With glucose as sole carbon source, the maximum total nitrogen (TN) removal of MFC-CW was 87.66 ± 4.23%, which was higher than that of MFC (85.58 ± 4.14%). The chemical oxygen demand (COD) and TN in the effluent of MFC-CW were maintained below 25 mg/L and 1.5 mg/L, respectively, with the COD/TN ratio around 5.4 and hydraulic retention time (HRT) at 48 h. The TN removal reached the maximum efficiency of 88.78 ± 3.98% when glucose and xylan ratio was in 40%:60% as composite carbon sources, and COD and TN in the effluent were below 20 mg/L and 1.5 mg/L, respectively. In addition, xylan as the additional carbon source significantly promoted the power density compared with sole glucose. Microbial community diversity in the MFC-CW was significantly higher than that in the single MFC or CW. Proteobacteria and Cyanobacteria_norank were relatively more dominant in the MFC-CW than those in the single MFC or CW, which accounted for high nitrogen removal and power generation. Findings in this study proved that MFC-CW with biomass addition enhanced nitrogen removal and power generation. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/31887514/Enhanced_denitrification_and_power_generation_of_municipal_wastewater_treatment_plants__WWTPs__effluents_with_biomass_in_microbial_fuel_cell_coupled_with_constructed_wetland_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)36155-8 DB - PRIME DP - Unbound Medicine ER -