J. Tanne, D. Schäfer, W. Khalid et al.

Analytical Chemistry • 2011

This study reports on the oxygen sensitivity of quantum dot electrodes modified with CdSe/ZnS nanocrystals. The photocurrent behavior is analyzed for dependence on pH and applied potential by potentiostatic and potentiodynamic measurements. On the basis of the influence of the oxygen content in solution on the photocurrent generation, the enzymatic activity of glucose oxidase is evaluated in solution. In order to construct a photobioelectrochemical sensor which can be read out by illuminating the respective electrode area, two different immobilization methods for the fixation of the biocatalyst have been investigated. Both covalent cross-linking and layer-by-layer deposition of GOD by means of the polyelectrolyte polyallylamine hydrochloride show that a sensor construction is possible. The sensing properties of this type of electrode are drastically influenced by the amount and density of the enzyme on top of the quantum dot layer, which can be advantageously adjusted by the layer-by-layer technique. By depositing four bilayers [GOD/PAH](4) on the CdSe/ZnS electrode, a fast-responding sensor for the concentration range of 0.1-5 mM glucose can be prepared. This study opens the door to multianalyte detection with a nonstructured sensing electrode, localized enzymes, and spatial read-out by light.

J. E. Dykstra, P. M. Biesheuvel, H. Bruning et al.

Physical Review E • 2014

Dídac Recio-Garrido, Michel Perrier, Boris Tartakovsky

Bioprocess and Biosystems Engineering • 2015

Several recent studies demonstrated significant charge storage in electrochemical biofilms. Aiming to evaluate the impact of charge storage on microbial fuel cell (MFC) performance, this work presents a combined bioelectrochemical-electrical (CBE) model of an MFC. In addition to charge storage, the CBE model is able to describe fast (ms) and slow (days) nonlinear dynamics of MFCs by merging mass and electron balances with equations describing an equivalent electrical circuit. Parameter estimation was performed using results of MFC operation with intermittent (pulse-width modulated) connection of the external resistance. The model was used to compare different methods of selecting external resistance during MFC operation under varying operating conditions. Owing to the relatively simple structure and fast numerical solution of the model, its application for both reactor design and real-time model-based process control applications are envisioned.

Min Su

Journal of Microbiology and Biotechnology • 2013

Rabeay Y. A. Hassan, Ulla Wollenberger

Analytical and Bioanalytical Chemistry • 2015

Staphylococcus aureus is one of the most dangerous human pathogens and is the cause of numerous illnesses ranging from moderate skin infections to life-threatening diseases. Despite advances made in identifying microorganisms, rapid detection methods for the viability of bacteria are still missing. Here, we report a rapid electrochemical assay for cell viability combining the use of double redox mediators and multiwall carbon nanotubes-screen printed electrodes (MWCNTs-SPE), ferricyanide (FCN) and 2,6-dichlorophenolindophenol (DCIP), which served as electron shuttle to enable the bacterial-electrode communications. The current originating from the metabolically active cells was recorded for probing the activity of the intracellular redox centers. Blocking of the respiratory chain pathways with electron transfer inhibitors demonstrated the involvement of the electron transport chain in the reaction. A good correlation between the number of the metabolically active cells and the current was obtained. The proposed assay has been exploited for monitoring cell proliferation of S. aureus during the growth. The sensitivity of the detection method reached 0.1 OD600. Therefore, the technique described is promising for estimating the cell number, measuring the cell viability, and probing intracellular redox center(s).

Omer Yehezkeli, Ran Tel-Vered, Julian Wasserman et al.

Nature Communications • 2012

Valdas Laurinavicius, Julija Razumiene, Vidute Gureviciene

IEEE Sensors Journal • 2013

Thomas Krieg, Anne Sydow, Uwe Schröder et al.

Trends in Biotechnology • 2014

Ralf Cord-Ruwisch, Yingyu Law, Ka Yu Cheng

Bioresource Technology • 2011

Abbas Rezaee, Mahdi Safari, Hoshyar Hossini

Environmental Technology • 2014

The aim of this work was to enhance the efficiency of a bioelectrochemical denitrification process using a biocathode of carbon felt (CF)/multiwall carbon nanotube (MWCNT) composite. The efficiency of the bioelectrochemical denitrification was assessed as the function of various operational parameters, such as ORP, pH, current density, retention time and nitrate concentrations. Scanning electron microscope (SEM) images of the biocathode surfaces revealed a homogeneous distribution of the MWCNT on the CF matrix. Optimum ORP, pH, current density and retention time were -100 mV, 7.0, 15 mA/cm2 and 6 h, respectively. The highest nitrate removal efficiency at the optimum condition was 92.7% for CF/MWCNT. The reduction time for achieving the nitrate standard using CF/MWCNT was 4 h. It is proposed that the prepared nanocomposite will have the best biocathode properties in the bioelectrochemistry denitrification experiments.

Olivier Courjean, Nicolas Mano

Journal of Biotechnology • 2010

Bo Young Jeon

Journal of Microbiology and Biotechnology • 2011

Ka Yu Cheng, Anna H. Kaksonen, Ralf Cord-Ruwisch

Bioresource Technology • 2013

Gemma Reguera

ECS Meeting Abstracts • 2012

Abstract not Available.

Y.V. Nancharaiah, S. Venkata Mohan, P.N.L. Lens

Bioresource Technology • 2015

Abhijeet P. Borole

Journal of Microbial & Biochemical Technology • 2011

Juan Wang, Tianlong Zheng, Qunhui Wang et al.

Current Science • 2015

Erika Fiset Sebastià Puig

Journal of Bioremediation & Biodegradation • 2014

Patrick T. Kelly, Zhen He

Bioresource Technology • 2014

Nutrient removal and recovery has received less attention during the development of bioelectrochemical systems (BES) for energy efficient wastewater treatment, but it is a critical issue for sustainable wastewater treatment. Both nitrogen and phosphorus can be removed and/or recovered in a BES through involving biological processes such as nitrification and bioelectrochemical denitrification, the NH4(+)/NH3 couple affected by the electrolyte pH, or precipitating phosphorus compounds in the high-pH zone adjacent a cathode electrode. This paper has reviewed the nutrients removal and recovery in various BES including microbial fuel cells and microbial electrolysis cells, discussed the influence factors and potential problems, and identified the key challenges for nitrogen and phosphorus removal/recovery in a BES. It expects to give an informative overview of the current development, and to encourage more thinking and investigation towards further development of efficient processes for nutrient removal and recovery in a BES.

Jason Hastings, Dev Chidambaram

ECS Meeting Abstracts • 2012

Abstract not Available.

Abhijeet P Borole

Journal of Microbial & Biochemical Technology • 2010

R. P. Ramasamy

Interface magazine • 2014

Yong JIANG, Min SU, Yao ZHANG et al.

Chinese Journal of Appplied Environmental Biology • 2013

Eduardo Nicolau, José J. Fonseca, José A. Rodríguez-Martínez et al.

ACS Sustainable Chemistry & Engineering • 2014

K. Vamshi Krishna, Omprakash Sarkar, S. Venkata Mohan

Bioresource Technology • 2014

Oskar Modin, Kensuke Fukushi

Environmental Technology • 2013

Bioelectrochemical systems can be used to energy-efficiently produce hydrogen peroxide (H2O2) from wastewater. Organic compounds in the wastewater are oxidized by microorganisms using the anode as electron acceptor. H2O2 is produced by reduction of oxygen on the cathode. In this study, we demonstrate for the first time production of high concentrations of H2O2 production from real municipal wastewater. A concentration of 2.26 g/L H2O2 was produced in 9 h at 8.3 kWh/kgH2O2. This concentration could potentially be useful for membrane cleaning at membrane bioreactor wastewater treatment plants. With an acetate-containing nutrient medium as anode feed, a H2O2 concentration of 9.67 g/L was produced in 21 h at an energy cost of 3.0 kWh/kgH2O2. The bioelectrochemical reactor used in this study suffered from a high internal resistance, most likely caused by calcium carbonate deposits on the cathode-facing side of the cation exchange membrane separating the anode and cathode compartments.

Haiping Luo, Bangyu Qin, Guangli Liu et al.

Frontiers of Environmental Science & Engineering • 2014

J. R. Asztalos

Journal of Environmental Informatics • 2014

Li Xiao, Erica B. Young, Jacob J. Grothjan et al.

Algal Research • 2015

J.B.A. Arends, S. Van Denhouwe, W. Verstraete et al.

Bioresource Technology • 2014

Robert Keith Brown, Falk Harnisch, Thomas Dockhorn et al.

Bioresource Technology • 2015

Heming Wang, Zhiyong Jason Ren

Water Research • 2014

Linda González-Gutiérrez, Carlos Frontana, Eduardo Martínez

Bioresource Technology • 2014

Linda Gonzalez-Gutierrez, Carlos Frontana, Eduardo Martínez et al.

Procedia Chemistry • 2013

Zhen He

ECS Meeting Abstracts • 2013

Abstract not Available.

Hao Ren, Soonjae Pyo, Jae-Ik Lee et al.

Journal of Power Sources • 2014

Yongwoo Lee, Lee Martin, Peter Grasel et al.

Environmental Technology • 2013

Anubha Kaushik, Anu Chetal

Bioresource Technology • 2013

The effect of anolyte and catholyte pH on power generation in an MFC using post methanation distillery effluent (PMDE) was studied in batch mode. Higher anodic pH (7-9) and low cathodic pH (2) were more favorable and at the optimal cathode:anode pH ratio of 2:8, power density attained was 0.457 W/m(3). An initial feed solution pH up to 10 was tolerated by the MFC. However, internal resistance increased 1.5 times and power density decreased by 60% at pH 10 as compared to that at pH 7, the normal anolyte pH. Internal resistance of the MFC was minimum (266 ohms) at cathodic pH 2, thus favoring better power generation. Under low cathodic and high anodic pH ratio of the MFC, a low internal resistance favored both high current density and power density.

Seokheun Choi, Junseok Chae

Sensors and Actuators A: Physical • 2013

J. Coronado, M. Perrier, B. Tartakovsky

Bioresource Technology • 2013