Bioelectrochemical processes and cellulosic carbon source enhance the autotrophic and heterotrophic denitrification of low C/N ratio wastewater in tidal flow constructed wetland - Microbial fuel cells

Zhang, Ke; Yang, Shuo; Wang, Wei; Luo, Huibo; Chen, Wei; Zhang, Xiaoxiao; Ma, Dandan; An, Xiaochan; Chen, Fenghui; Cheng, Lin; Chen, Jia; Mo, You; Fan, Liangqian; Xiao, Weimin

doi:10.1016/j.jclepro.2022.132368

Cited by 38 publications

(3 citation statements)

References 42 publications

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“…The improvement of NH 4 + -N removal (81%) was attributed to the electrical enhanced nitrification and denitrification processes on bio-cathode (Xu et al 2018c). S12); the average voltage achieved 450 mV and the maximum power density was 114 mW•m −3 ; the best removal effect of COD, NH 4 + -N, TN, and TP in low C/N ratio wastewater was 98%, 79%, 84%, and 90%, respectively, suggesting that the agricultural residues (the rape straw) may have a great potential in CW-MFC as the cellulose carbon source (Zhang et al 2022c).…”

Section: Bio-cathodementioning

confidence: 99%

The electrode strategy and its coordination mechanism in constructed wetland-microbial fuel cell (CW-MFC): a review

An,

Guan,

et al. 2024

Carbon Res.

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The electrode played an essential role in the operation of CW-MFC system due to its synergistic effect, and the development of electrode strategy has promoted the application of CW-MFC since 2012. In this paper, according to the material and the quantity, the electrode types in CW-MFC were distinctly divided into unified model, composited model, modified model, and multi-electrodes model combined with non-conductive or conductive particle. Different electrode strategies were provided to improve the performance of CW-MFC towards electricity generation, removal of pollutants, and control of greenhouse gas emission, and the coordination mechanism was further reviewed. Furthermore, the development process of the electrode strategy was summarized, and the low-cost, sustainable, and innovated electrode materials were emphatically recommended. For the scale-up application, multi-electrode model was systematically reviewed based on the optimizing of the material, shape, spacing distance, and connection type of electrode. This review may provide guidance to maximize the advantages of CW-MFC applications. Graphical Abstract

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Section: Bio-cathodementioning

confidence: 99%

The electrode strategy and its coordination mechanism in constructed wetland-microbial fuel cell (CW-MFC): a review

An,

Guan,

et al. 2024

Carbon Res.

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“…Therefore, the microbial diversity under treatment B was signi cantly higher than the others (Table 2). Proteobacteria and Bacteroidetes can participate in denitri cation and play an important role in nitrogen degradation (Zhang et al 2022). Conversely, Patescibacteria was found to have synergistic effects on nitrogen xation genes and can inhibit various enzymes in nitrogen degradation .…”

Section: Effect Of Different Carbon Source Additions On Nitrogen Remo...mentioning

confidence: 99%

“…12). CH 4 can be produced by methanogenic in an anaerobic environment and will be consumed by methane-oxidizing bacteria with su cient oxygen (Zhang et al 2022). The hydrolysis of carbon sources consumed a large amount of DO (Fig.…”

Section: Effect Of Different Carbon Source Additions On Nitrogen Remo...mentioning

confidence: 99%

Application of alkali-heated corncobs enhanced nitrogen removal and microbial diversity in constructed wetlands for treating low C/N ratio wastewater

Liang

Hao

et al. 2023

Preprint

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Lack of carbon source is the main factor limiting denitrification of low C/N ratio wastewater in constructed wetlands (CWs). Agricultural waste has been considered as a supplementary carbon source but research is still limited. To solve this problem, ferric carbon (Fe-C) + zeolite, Fe-C + gravel and gravel were used as substrates to build CWs in this experiment, aiming to investigate the effects of different carbon sources (rice straw, corncobs, alkali-heated corncobs) on nitrogen removal performance and microbial community structure in CWs for low C/N wastewater. The results demonstrated that the microbial community and effluent nitrogen concentration of CWs were mainly influenced by the carbon source rather than the substrate. Alkali-heated corncobs significantly enhanced the removal of NO2−-N, NH4+-N, NO3−-N and TN. Carbon sources addition increased microbial diversity. Alkali-heated corncobs addition significantly increased the abundance of heterotrophic denitrifying bacteria (Proteobacteria and Bacteroidota). Furthermore, alkali-heated corncobs addition increased the copy number of nirS, nosZ and nirK genes while greenhouse gas fluxes were lower than common corncobs. In summary, alkali-heated corncobs can be considered as an effective carbon source.

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New Constructed Wetlands

Dawen,

Nabi

2024

Springer Water

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Bioelectrochemical processes and cellulosic carbon source enhance the autotrophic and heterotrophic denitrification of low C/N ratio wastewater in tidal flow constructed wetland - Microbial fuel cells

Cited by 38 publications

References 42 publications

The electrode strategy and its coordination mechanism in constructed wetland-microbial fuel cell (CW-MFC): a review

The electrode strategy and its coordination mechanism in constructed wetland-microbial fuel cell (CW-MFC): a review

Application of alkali-heated corncobs enhanced nitrogen removal and microbial diversity in constructed wetlands for treating low C/N ratio wastewater

New Constructed Wetlands

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