Biosensor nanostructures based on dual-chamber microbial fuel cells for rapid determination of biochemical oxygen demand and microbial community analysis

Yang, Qian; Lai, Mingyang; Liu, Dawei; Zhang, Junyuan; Zhang, Yang; Liu, Changyu; Xu, Xiaolong; Jia, Jianbo

doi:10.1007/s10008-022-05351-3

Cited by 4 publications

(1 citation statement)

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“…Basically, a gradual increase in peak voltage was evidenced over time during the accumulation and reduction of nutrients. The authors correlate this phenomenon with the enrichment of electrogenic communities at the anode [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

Batch and semi-continuous treatment of cassava wastewater using microbial fuel cells and metataxonomic analysis

Quintero-Díaz,

Gil-Posada

2024

Bioprocess Biosyst Eng

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The treatment of agroindustrial wastewater using microbial fuel cells (MFCs) is a technological strategy to harness its chemical energy while simultaneously purifying the water. This manuscript investigates the organic load effect as chemical oxygen demand (COD) on the production of electricity during the treatment of cassava wastewater by means of a dual-chamber microbial fuel cell in batch mode. Additionally, specific conditions were selected to evaluate the semi-continuous operational mode. The dynamics of microbial communities on the graphite anode were also investigated. The maximum power density delivered by the batch MFC (656.4 μW m$$^{-2}$$ - 2 ) was achieved at the highest evaluated organic load (6.8 g COD L$$^{-1}$$ - 1 ). Similarly, the largest COD removal efficiency (61.9%) was reached at the lowest organic load (1.17 g COD L$$^{-1}$$ - 1 ). Cyanide degradation percentages (50–70%) were achieved across treatments. The semi-continuous operation of the MFC for 2 months revealed that the voltage across the cell is dependent on the supply or suspension of the organic load feed. The electrode polarization resistance was observed to decreases over time, possibly due to the enrichment of the anode with electrogenic microbial communities. A metataxonomic analysis revealed a significant increase in bacteria from the phylum Firmicutes, primarily of the genus Enterococcus.

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Section: Resultsmentioning

confidence: 99%