Electricity generation from fermented primary sludge using single-chamber air-cathode microbial fuel cells

Fei Yang; Lijiao Ren; Yuepu Pu; Bruce E. Logan

doi:10.1016/j.biortech.2012.10.021

Electricity generation from fermented primary sludge using single-chamber air-cathode microbial fuel cells

Fei Yang, Lijiao Ren, Yuepu Pu, Bruce E. Logan

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m², compared to 0.24±0.03W/m² with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m²) or the solution (0.87±0.05W/m²). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.

Original language	English (US)
Pages (from-to)	784-787
Number of pages	4
Journal	Bioresource technology
Volume	128
DOIs	https://doi.org/10.1016/j.biortech.2012.10.021
State	Published - Jan 2013

All Science Journal Classification (ASJC) codes

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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title = "Electricity generation from fermented primary sludge using single-chamber air-cathode microbial fuel cells",

abstract = "Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m2, compared to 0.24±0.03W/m2 with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m2) or the solution (0.87±0.05W/m2). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.",

author = "Fei Yang and Lijiao Ren and Yuepu Pu and Logan, {Bruce E.}",

note = "Funding Information: We thank Fang Zhang and Yong Luo for advice on MFC configurations, and David Jones and Xiuping Zhu for their help on VFAs measurements. This work was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) , and Jiangsu Province Graduate Innovation Project ( CX10B-087Z ).",

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doi = "10.1016/j.biortech.2012.10.021",

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AU - Yang, Fei

AU - Ren, Lijiao

AU - Pu, Yuepu

AU - Logan, Bruce E.

N1 - Funding Information: We thank Fang Zhang and Yong Luo for advice on MFC configurations, and David Jones and Xiuping Zhu for their help on VFAs measurements. This work was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) , and Jiangsu Province Graduate Innovation Project ( CX10B-087Z ).

PY - 2013/1

Y1 - 2013/1

N2 - Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m2, compared to 0.24±0.03W/m2 with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m2) or the solution (0.87±0.05W/m2). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.

AB - Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m2, compared to 0.24±0.03W/m2 with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m2) or the solution (0.87±0.05W/m2). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.

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Electricity generation from fermented primary sludge using single-chamber air-cathode microbial fuel cells

Abstract

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