Energy from Plants and Microorganisms: Progress in Plant–Microbial Fuel Cells

Deng, Huan; Chen, Zheng; Zhao, Feng

doi:10.1002/cssc.201100257

Cited by 111 publications

(53 citation statements)

References 49 publications

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“…The power output could be further improved by adopting proper methods. An increase of the anode area could probably improve the columbic efficiency (Deng et al, 2012). The decomposition rate of organic matter can be accelerated at a temperature of over 30…”

Section: Open Circuit Voltage (Ocv) and Power Outputmentioning

confidence: 99%

“…The power can be harvested and stored for further needs. Moreover, the MFCs in our study were membrane free so that a large proportion of cost would be exempted in scaling up single-chamber MFCs (Deng et al, 2012).…”

Section: Open Circuit Voltage (Ocv) and Power Outputmentioning

confidence: 99%

“…Moreover, the cost of a single-chamber MFC is much lower than that of a two-chamber one. To keep O 2 away from anode, single-chamber MFCs such as sediment-MFCs need a thick layer of soil or sediment, leading to a high internal resistance (Deng et al, 2012), thus the performance of single-chamber soil MFCs deserves studies. In addition, several factors were reported to have a major impact on the performance of MFCs.…”

Section: Introductionmentioning

confidence: 99%

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Factors Affecting the Performance of Single-Chamber Soil Microbial Fuel Cells for Power Generation

et al. 2014

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There is limited information about the factors that affect the power generation of single-chamber microbial fuel cells (MFCs) using soil organic matter as a fuel source. We examined the effect of soil and water depths, and temperature on the performance of soil MFCs with anode being embedded in the flooded soil and cathode in the overlaying water. Results showed that the MFC with 5 cm deep soil and 3 cm overlaying water exhibited the highest open circuit voltage of 562 mV and a power density of 0.72 mW m −2 . The ohmic resistance increased with more soil and water. The polarization resistance of cathode increased with more soil while that of anode increased with more water. During the 30 d operation, the cell voltage positively correlated with temperature and reached a maximum of 162 mV with a 500 Ω external load. After the operation, the bacterial 16S rRNA gene from the soil and anode was sequenced. The bacteria in the soil were more diverse than those adhere to the anode where the bacteria were mainly affiliated to Escherichia coli and Deltaproteobacteria. In summary, the two bacterial groups may generate electricity and the electrical properties were affected by temperature and the depth of soil and water.

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Section: Open Circuit Voltage (Ocv) and Power Outputmentioning

confidence: 99%

Section: Open Circuit Voltage (Ocv) and Power Outputmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Factors Affecting the Performance of Single-Chamber Soil Microbial Fuel Cells for Power Generation

et al. 2014

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“…En el caso que documentamos en este trabajo, se ha optado por una propuesta novedosa con un trasfondo tecnológico y socio-económico, pero sin olvidar una educación en valores (Martín et al, 2000). En concreto, se propone un conjunto de actividades dirigidas a las pilas de combustible microbianas (MFC, acrónimo de Microbial Fuel Cells), que son unos dispositivos que permiten obtener electricidad, incluso en áreas remotas, a partir de cultivos de plantas o simplemente gracias a la actividad microbiana de un suelo (Deng et al, 2012). Por un lado, permiten ver al alumnado que las plantas transforman la energía del sol en energía química y esta última puede a su vez transformarse en electricidad.…”

Section: Introductionunclassified

Percepciones y actitudes sobre la energía sostenible en alumnos de Educación Secundaria y propuesta de actividades

Fernández

Mozo

Martínez

et al. 2017

M+A. Revista Electrónica De Medioambiente

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Recibido: 26 de mayo del 2016/ Enviado a evaluar: 6 de junio del 2016/ Aceptado: 18 de julio del 2017Resumen. En el presente trabajo se han estudiado las percepciones y actitudes sobre la energía sostenible en un grupo de estudiantes de 2º y 4º de ESO de dos centros escolares de la Comunidad de Madrid. La herramienta para recabar la información necesaria ha consistido en un cuestionario abierto preparado a partir de la literatura. Además, con uno de los grupos se ha llevado a cabo una propuesta didáctica atractiva y dinámica basada en la columna de Winogradsky como paso previo hacia las pilas de combustible microbianas, aprovechando la declaración de 2014 como el año de la Biotecnología en España. Esta propuesta puede servir de referencia a los docentes para reforzar y extender contendos de Física, Química y Biología en el marco de una Educación Ambiental responsable y comprometida en Educación Secundaria. Transversalmente, aunque no por eso menos importante, se ha pretendido con la propuesta aumentar el interés hacia las ciencias experimentales y despertar nuevas vocaciones científicas entre los discentes. Palabras clave: Desarrollo sostenible; energía sostenible; educación ambiental; Educación Secundaria.[en] Perceptions and attitudes above sustainable energy for some students of Secondary Education and activities proposal Abstract. In this work, it has been studied the perceptions and attitudes about sustainable energy of two groups of students (2 nd and 4 th year of Secondary Education) of the Community of Madrid. The datacollection tool has consisted of an open questionnaire prepared based upon the literature. In addition, it has been performed an attractive and dynamic school activity based on the Winogradsky column as a previous work of the microbial fuel cells-taking into account that 2014 was declared the year of Biotechnology in Spain. This proposal may be considered a reference point for teachers who want to reinforce and extend content of Physics, Chemistry and Biology in the framework of a responsible and committed Environmental Education in Secondary Education. Transversely but not least, we have tried with this proposal to increase the interest in the experimental sciences and encourage new scientific vocations among the students.

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“…They are currently exploited in bioremediation, for example, in wastewater treatment plants (1), and in the production of biofuels or bioelectricity in microbial fuel cells (2,3). Moreover, there is a multitude of symbiotic relationships between microbial biofilms and higher organisms that contribute to physiological homeostasis (4,5).…”

mentioning

confidence: 99%

Ratiometric Imaging of Extracellular pH in Bacterial Biofilms with C-SNARF-4

Schlafer

Garcı́a

Greve

et al. 2015

Appl Environ Microbiol

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c pH in the extracellular matrix of bacterial biofilms is of central importance for microbial metabolism. Biofilms possess a complex three-dimensional architecture characterized by chemically different microenvironments in close proximity. For decades, pH measurements in biofilms have been limited to monitoring bulk pH with electrodes. Although pH microelectrodes with a better spatial resolution have been developed, they do not permit the monitoring of horizontal pH gradients in biofilms in real time. Quantitative fluorescence microscopy can overcome these problems, but none of the hitherto employed methods differentiated accurately between extracellular and intracellular microbial pH and visualized extracellular pH in all areas of the biofilms. Here, we developed a method to reliably monitor extracellular biofilm pH microscopically with the ratiometric pH-sensitive dye C-SNARF-4, choosing dental biofilms as an example. Fluorescent emissions of C-SNARF-4 can be used to calculate extracellular pH irrespective of the dye concentration. We showed that at pH values of <6, C-SNARF-4 stained 15 bacterial species frequently isolated from dental biofilm and visualized the entire bacterial biomass in in vivo-grown dental biofilms with unknown species composition. We then employed digital image analysis to remove the bacterial biomass from the microscopic images and adequately calculate extracellular pH values. As a proof of concept, we monitored the extracellular pH drop in in vivo-grown dental biofilms fermenting glucose. The combination of pH ratiometry with C-SNARF-4 and digital image analysis allows the accurate monitoring of extracellular pH in bacterial biofilms in three dimensions in real time and represents a significant improvement to previously employed methods of biofilm pH measurement.

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Energy from Plants and Microorganisms: Progress in Plant–Microbial Fuel Cells

Cited by 111 publications

References 49 publications

Factors Affecting the Performance of Single-Chamber Soil Microbial Fuel Cells for Power Generation

Factors Affecting the Performance of Single-Chamber Soil Microbial Fuel Cells for Power Generation

Percepciones y actitudes sobre la energía sostenible en alumnos de Educación Secundaria y propuesta de actividades

Ratiometric Imaging of Extracellular pH in Bacterial Biofilms with C-SNARF-4

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