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MFC-based biosensor for domestic wastewater COD assessment in constructed wetlands.
Sci Total Environ. 2019 Apr 10; 660:218-226.ST

Abstract

In the context of natural-based wastewater treatment technologies (such as constructed wetlands - CW) the use of a low-cost, continuous-like biosensor tool for the assessment of operational conditions is of key importance for plant management optimization. The objective of the present study was to assess the potential use of constructed wetland microbial fuel cells (CW-MFC) as a domestic wastewater COD assessment tool. For the purpose of this work four lab-scale CW-MFCs were set up and fed with pre-settled domestic wastewater at different COD concentrations. Under laboratory conditions two different anodic materials were tested (graphite rods and gravel). Furthermore, a pilot-plant based experiment was also conducted to confirm the findings previously recorded for lab-scale experiments. Results showed that in spite of the low coulombic efficiencies recorded, either gravel or graphite-based anodes were suitable for the purposes of domestic wastewater COD assessment. Significant linear relationships could be stablished between inlet COD concentrations and CW-MFC Ecell whenever contact time was above 10 h. Results also showed that the accuracy of the CW-MFC was greatly compromised after several weeks of operation. Pilot experiments showed that CW-MFC presents a good bio-indication response between week 3 and 7 of operation (equivalent to an accumulated organic loading between 100 and 200 g COD/m2, respectively). Main conclusion of this work is that of CW-MFC could be used as an "alarm-tool" for qualitative continuous influent water quality assessment rather than a precise COD assessment tool due to a loss of precision after several weeks of operation.

Authors+Show Affiliations

Group of environmental engineering and microbiology (GEMMA), Universitat Politècnica de Catalunya - BarcelonaTech, Spain.Group of environmental engineering and microbiology (GEMMA), Universitat Politècnica de Catalunya - BarcelonaTech, Spain.Group of environmental engineering and microbiology (GEMMA), Universitat Politècnica de Catalunya - BarcelonaTech, Spain.Group of environmental engineering and microbiology (GEMMA), Universitat Politècnica de Catalunya - BarcelonaTech, Spain. Electronic address: jaume.puigagut@upc.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30640090

Citation

Corbella, C, et al. "MFC-based Biosensor for Domestic Wastewater COD Assessment in Constructed Wetlands." The Science of the Total Environment, vol. 660, 2019, pp. 218-226.
Corbella C, Hartl M, Fernandez-Gatell M, et al. MFC-based biosensor for domestic wastewater COD assessment in constructed wetlands. Sci Total Environ. 2019;660:218-226.
Corbella, C., Hartl, M., Fernandez-Gatell, M., & Puigagut, J. (2019). MFC-based biosensor for domestic wastewater COD assessment in constructed wetlands. The Science of the Total Environment, 660, 218-226. https://doi.org/10.1016/j.scitotenv.2018.12.347
Corbella C, et al. MFC-based Biosensor for Domestic Wastewater COD Assessment in Constructed Wetlands. Sci Total Environ. 2019 Apr 10;660:218-226. PubMed PMID: 30640090.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - MFC-based biosensor for domestic wastewater COD assessment in constructed wetlands. AU - Corbella,C, AU - Hartl,M, AU - Fernandez-Gatell,M, AU - Puigagut,J, Y1 - 2018/12/24/ PY - 2018/10/23/received PY - 2018/12/21/revised PY - 2018/12/22/accepted PY - 2019/1/15/pubmed PY - 2019/3/8/medline PY - 2019/1/15/entrez KW - Biosensor KW - Constructed wetlands KW - Gravel-based anode KW - Microbial fuel cells KW - Real wastewater SP - 218 EP - 226 JF - The Science of the total environment JO - Sci Total Environ VL - 660 N2 - In the context of natural-based wastewater treatment technologies (such as constructed wetlands - CW) the use of a low-cost, continuous-like biosensor tool for the assessment of operational conditions is of key importance for plant management optimization. The objective of the present study was to assess the potential use of constructed wetland microbial fuel cells (CW-MFC) as a domestic wastewater COD assessment tool. For the purpose of this work four lab-scale CW-MFCs were set up and fed with pre-settled domestic wastewater at different COD concentrations. Under laboratory conditions two different anodic materials were tested (graphite rods and gravel). Furthermore, a pilot-plant based experiment was also conducted to confirm the findings previously recorded for lab-scale experiments. Results showed that in spite of the low coulombic efficiencies recorded, either gravel or graphite-based anodes were suitable for the purposes of domestic wastewater COD assessment. Significant linear relationships could be stablished between inlet COD concentrations and CW-MFC Ecell whenever contact time was above 10 h. Results also showed that the accuracy of the CW-MFC was greatly compromised after several weeks of operation. Pilot experiments showed that CW-MFC presents a good bio-indication response between week 3 and 7 of operation (equivalent to an accumulated organic loading between 100 and 200 g COD/m2, respectively). Main conclusion of this work is that of CW-MFC could be used as an "alarm-tool" for qualitative continuous influent water quality assessment rather than a precise COD assessment tool due to a loss of precision after several weeks of operation. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30640090/MFC_based_biosensor_for_domestic_wastewater_COD_assessment_in_constructed_wetlands_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(18)35240-9 DB - PRIME DP - Unbound Medicine ER -