A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation

Abstract Background The critical MFC design challenge is to increase anode surface area. A novel FAB–MFC integrated system was developed and evaluated for domestic wastewater treatment. It was operated in fed-batch flow mode at 1–3 days of HRT with 755 mg/L CODIN and 0.76 kg-COD/m3/day. The study in...

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Autores principales:	Tesfalem Atnafu, Seyoum Leta
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Microbial fuel cell Fragmented anode biofilm reactor (FAB) Electroactive biofilm (EAB) Anode surface area Microbial electrode jacket dish (MEJ-dish) Technology T Chemical technology TP1-1185 Biotechnology TP248.13-248.65
Acceso en línea:	https://doaj.org/article/820c423f0af146f1a5ecf05b413d47ec
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spelling	oai:doaj.org-article:820c423f0af146f1a5ecf05b413d47ec2021-11-14T12:06:02ZA novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation10.1186/s40643-021-00442-x2197-4365https://doaj.org/article/820c423f0af146f1a5ecf05b413d47ec2021-11-01T00:00:00Zhttps://doi.org/10.1186/s40643-021-00442-xhttps://doaj.org/toc/2197-4365Abstract Background The critical MFC design challenge is to increase anode surface area. A novel FAB–MFC integrated system was developed and evaluated for domestic wastewater treatment. It was operated in fed-batch flow mode at 1–3 days of HRT with 755 mg/L CODIN and 0.76 kg-COD/m3/day. The study includes anaerobic-MFC and aerobic-MFC integrated systems. Microbial electrode jacket dish (MEJ-dish) with hybrid dimension (HD) was invented, first time to authors’ knowledge, to boost anode biofilm growth. The treatment system with MEJ+ (FAB) and MEJ− (MFC) anode are called FAB–MFC and MFC, respectively. Results Fragmented variable anode biofilm thickness was observed in FAB than MFC. The FAB–MFC (FAB+) simple technique increases the anode biofilm thickness by ~ 5 times MFC. Due to HD the anode biofilm was fragmented in FAB+ system than MFC. At the end of each treatment cycle, voltage drops. All FAB+ integrated systems reduced voltage drop relative to MFC. FAB reduces voltage drops better than MFC in anaerobic-MFC from 6 to 20 mV and aerobic-MFC from 35–47 mV at 1 kΩ external load. The highest power density was achieved by FAB in anaerobic-MFC (FAB = 104 mW/m2, MFC = 98 mW/m2) and aerobic-MFC integrated system (FAB = 59 mW/m2, MFC = 42 mW/m2). Conclusions The ∆COD and CE between FAB and MFC could not be concluded because both setups were inserted in the same reactor. The integrated system COD removal (78–97%) was higher than the solitary MFC treatment (68–78%). This study findings support the FAB+ integrated system could be applied for real applications and improve performance. However, it might depend on influent COD, the microbial nature, and ∆COD in FAB+ and MFC, which requires further study. Graphic abstractTesfalem AtnafuSeyoum LetaSpringerOpenarticleMicrobial fuel cellFragmented anode biofilm reactor (FAB)Electroactive biofilm (EAB)Anode surface areaMicrobial electrode jacket dish (MEJ-dish)TechnologyTChemical technologyTP1-1185BiotechnologyTP248.13-248.65ENBioresources and Bioprocessing, Vol 8, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microbial fuel cell Fragmented anode biofilm reactor (FAB) Electroactive biofilm (EAB) Anode surface area Microbial electrode jacket dish (MEJ-dish) Technology T Chemical technology TP1-1185 Biotechnology TP248.13-248.65
spellingShingle	Microbial fuel cell Fragmented anode biofilm reactor (FAB) Electroactive biofilm (EAB) Anode surface area Microbial electrode jacket dish (MEJ-dish) Technology T Chemical technology TP1-1185 Biotechnology TP248.13-248.65 Tesfalem Atnafu Seyoum Leta A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
description	Abstract Background The critical MFC design challenge is to increase anode surface area. A novel FAB–MFC integrated system was developed and evaluated for domestic wastewater treatment. It was operated in fed-batch flow mode at 1–3 days of HRT with 755 mg/L CODIN and 0.76 kg-COD/m3/day. The study includes anaerobic-MFC and aerobic-MFC integrated systems. Microbial electrode jacket dish (MEJ-dish) with hybrid dimension (HD) was invented, first time to authors’ knowledge, to boost anode biofilm growth. The treatment system with MEJ+ (FAB) and MEJ− (MFC) anode are called FAB–MFC and MFC, respectively. Results Fragmented variable anode biofilm thickness was observed in FAB than MFC. The FAB–MFC (FAB+) simple technique increases the anode biofilm thickness by ~ 5 times MFC. Due to HD the anode biofilm was fragmented in FAB+ system than MFC. At the end of each treatment cycle, voltage drops. All FAB+ integrated systems reduced voltage drop relative to MFC. FAB reduces voltage drops better than MFC in anaerobic-MFC from 6 to 20 mV and aerobic-MFC from 35–47 mV at 1 kΩ external load. The highest power density was achieved by FAB in anaerobic-MFC (FAB = 104 mW/m2, MFC = 98 mW/m2) and aerobic-MFC integrated system (FAB = 59 mW/m2, MFC = 42 mW/m2). Conclusions The ∆COD and CE between FAB and MFC could not be concluded because both setups were inserted in the same reactor. The integrated system COD removal (78–97%) was higher than the solitary MFC treatment (68–78%). This study findings support the FAB+ integrated system could be applied for real applications and improve performance. However, it might depend on influent COD, the microbial nature, and ∆COD in FAB+ and MFC, which requires further study. Graphic abstract
format	article
author	Tesfalem Atnafu Seyoum Leta
author_facet	Tesfalem Atnafu Seyoum Leta
author_sort	Tesfalem Atnafu
title	A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
title_short	A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
title_full	A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
title_fullStr	A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
title_full_unstemmed	A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation
title_sort	novel fragmented anode biofilm microbial fuel cell (fab–mfc) integrated system for domestic wastewater treatment and bioelectricity generation
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/820c423f0af146f1a5ecf05b413d47ec
work_keys_str_mv	AT tesfalematnafu anovelfragmentedanodebiofilmmicrobialfuelcellfabmfcintegratedsystemfordomesticwastewatertreatmentandbioelectricitygeneration AT seyoumleta anovelfragmentedanodebiofilmmicrobialfuelcellfabmfcintegratedsystemfordomesticwastewatertreatmentandbioelectricitygeneration AT tesfalematnafu novelfragmentedanodebiofilmmicrobialfuelcellfabmfcintegratedsystemfordomesticwastewatertreatmentandbioelectricitygeneration AT seyoumleta novelfragmentedanodebiofilmmicrobialfuelcellfabmfcintegratedsystemfordomesticwastewatertreatmentandbioelectricitygeneration
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A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generation

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