Bioelectricity generation in a self-sustainable Microbial Solar Cell

Mateo, Sara; Campo, Araceli González del; Cañizares, Pablo; Lobato, Justo; Rodrigo, Manuel A.; Fernández, Francisco J.

doi:10.1016/j.biortech.2014.03.059

Cited by 25 publications

(21 citation statements)

References 17 publications

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“…Microbial fuel cells are energy transformation devices based on the action of electrogenic microorganisms that harvest energy contained in organic substrates producing directly electricity . Although the first reports of this bio‐electrochemical technology were published several decades ago, the search for novel technologies which can minimize the dependence on fossil fuels and be integrated with environmentally friendly processes (such as remediation of wastewater technologies) has increased the research interest in this topic . Therefore, hundreds of papers are published every year, regarding the use of different substrates, electrode materials or cell designs.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the performance of an air-cathode MFC by changing solid retention time

D’Angelo

Mateo

Scialdone

et al. 2017

J. Chem. Technol. Biotechnol

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BACKGROUND This work is focused on the optimization of the performances of air‐cathode microbial fuel cells (MFC) by changing the solid retention time (SRT) of the suspended biomass culture. RESULTS Five MFCs inoculated with activated sludge obtained from a municipal wastewater treatment plant were fed with a highly‐concentrated acetate solution (10 000 ppm COD) and operated over two‐month tests in order to determine how SRT may influence the performances of the bio‐electrogenic cells. The MFC operated at SRTs of 2.5 days was found to outperform the other cells, operated at SRT of 1.4, 5.0, 7.4 and 10.0 days. In order to evaluate the possibility of using SRT as a manipulated parameter for the regulation of the operation of MFC, the SRT of the other MFCs was changed from their initial value up or down to 2.5 days. CONCLUSIONS As a result of the change in the SRT, production of electricity of the cells increased significantly in all cases, highlighting the relevance of SRT control in the optimization of the performances of MFCs. By operating at SRT 2.5 days, the current density was 4.2 A m−2, the COD consumption rate was 1.53 g COD d−1 L−1 and the COD transformed by electrogenic microorganisms was estimated at 1.5%. © 2016 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Optimization of the performance of an air-cathode MFC by changing solid retention time

D’Angelo

Mateo

Scialdone

et al. 2017

J. Chem. Technol. Biotechnol

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“…This figure shows that the values initially presented a descending trend. This behavior could be explained by the development of a more active electroactive biofilm at the surface of the electrode . In this case, the higher activity reduced the resistance to the electrical current.…”

Section: Resultsmentioning

confidence: 95%

“…Energy demands for conventional water and wastewater processes are a significant part of the problem in supplying these commodities; e.g., in the US, approximately 5% of the electricity consumption is due to the water treatment processes . Renewable energy sources represent some of the most appropriate options to reach the sustainable energy production objective . In addition, the development of processes that can use microorganisms to produce electricity from wastes represents an interesting approach for bioenergy production .…”

Section: Introductionmentioning

confidence: 99%

Long‐term effects of the transient COD concentration on the performance of microbial fuel cells

Mateo

Campo

Lobato

et al. 2016

Biotechnology Progress

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In this work, the long-term effects of transient chemical oxygen demands (COD) concentrations over the performance of a microbial fuel cell were studied. From the obtained results, it was observed that the repetitive change in the COD loading rate during 12 h conditioned the behavior of the system during periods of up to 7 days. The main modifications were the enhancement of the COD consumption rate and the exerted current. These enhancements yielded increasing Coulombic efficiencies (CEs) when working with COD concentrations of 300 mg/L, but constant CEs when working with COD concentrations from 900 to 1800 mg/L. This effect could be explained by the higher affinity for the substrate of Geobacter than that of the nonelectrogenic organisms such as Clostridia. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:883-890, 2016.

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“…Energy shortages have attracted significant attention due to the shrinking availability of non-renewable resources. Therefore, thermal energy storage, is one of the solutions that leads to saving of fossil fuels and makes systems more costeffective by the storage of wasted thermal energy (Mateo et al 2014). In particular, the application of phase change materials (PCMs) is considered as an effective and efficient approach to thermal energy storage because of the high latent heat storage capacity at small temperature intervals (Zeng et al 2013;Zhang et al 2013;Tang et al 2015;Cai et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity of waste sawdust-based composite phase change materials with expanded graphite for thermal energy storage

Yang

Wang

Liu³

et al. 2017

Bioresour. Bioprocess.

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Background: With the current rapid economic growth, demands for energy are progressively increasing. Energy shortages have attracted significant attention due to the shrinking availability of non-renewable resources. Therefore, thermal energy storage is one of the solutions that lead to saving of fossil fuels and make systems more cost-effective by the storage of wasted thermal energy. In particular, the application of phase change materials (PCMs) is considered as an effective and efficient approach to thermal energy storage because of the high latent heat storage capacity at small temperature intervals. Nevertheless, leakage problems and low thermal conductivity limit the practical applications of PCMs. Therefore, form-stable phase change materials with high thermal conductivity are urgently needed. Results:A novel form-stable composite phase change material was prepared by incorporating PEG into waste sawdust with 5% EG. In the composites, PEG served as a phase change material, while waste sawdust acted as a carrier matrix. EG was added to help increase the thermal conductivity of the composites. The melting temperature of CPCMs-4 with 5% EG was found to be 58.6 °C with a phase change enthalpy of 145.3 kJ/kg, while the solidifying temperature was 48.5 °C with a phase change enthalpy of 131.4 kJ/kg. The thermal conductivity of CPCMs-4 with 5% EG increased by 23.8% compared with that of CPCMs-4. Moreover, no obvious changes in melting, solidifying temperature, or latent heat after 200 heating-cooling cycles were detected. The supercooling extent of CPCMs-4 with 5% EG decreased by 19.2% compared with PEG. The volume change properties and wettability properties of CPCMs-4 with 5% EG are suitable for thermal energy in terms of practical application. Conclusions:The prepared composites have excellent thermal and form-stable properties and they can be recognized as potential candidates for thermal energy storage as form-stable composite phase change materials. Using simple impregnation techniques with waste sawdust as a supporting material, this study demonstrates an innovative technology for practically and markedly enhancing the adsorption capacity of phase change materials.

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Bioelectricity generation in a self-sustainable Microbial Solar Cell

Cited by 25 publications

References 17 publications

Optimization of the performance of an air-cathode MFC by changing solid retention time

Optimization of the performance of an air-cathode MFC by changing solid retention time

Long‐term effects of the transient COD concentration on the performance of microbial fuel cells

Enhanced thermal conductivity of waste sawdust-based composite phase change materials with expanded graphite for thermal energy storage

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