Layer-to-layer distance determines the performance of 3D bio-electrochemical lamellar anodes in microbial energy transduction processes

Massazza, Diego A.; Busalmen, Juan Pablo; Parra, Rodrigo; Romeo, Hernan Esteban

doi:10.1039/c8ta02793e

Cited by 13 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dominating role of the ohmic resistance confirms the data of the abiotic electrochemical experiments described above (Figures and S6), and is also in agreement to previous BES studies …”

Section: Resultssupporting

confidence: 92%

See 1 more Smart Citation

Optimal Geometric Parameters for 3D Electrodes in Bioelectrochemical Systems: A Systematic Approach

et al. 2020

View full text Add to dashboard Cite

In this study, the performance of electroactive bacteria (EAB), cultivated inside tubular electrode ducts, is systematically investigated to derive predictions on the behavior of EAB under conditions limited by electrochemical losses. A modeling approach is applied to assess the influence of the electrochemical losses on the electrochemical performance and scaling characteristics of complex 3D structures, such as sponges and foams. A modular flow reactor is designed that provides laminar and reproducible flow conditions as a platform for the systematic electrochemical and bioelectrochemical characterization of 3D electrodes in bioelectrochemical systems (BES). The bioelectrochemical experiments are carried out in a set of reactors incorporating cylindrical electrodes exhibiting ducts of 1 cm length and different diameters ranging from 0.1 cm up to 1 cm. Single duct calculations are extrapolated to three dimensions through geometrical considerations; trends in 3D bioanode performance are demonstrated using the resulting simplified 3D structure. The combined experimental and modeling approach constitutes a framework for future studies on systematic electrode design.

show abstract

Section: Resultssupporting

confidence: 92%

“…For this purpose, we use a model based on a tight packing of parallel cylindrical tubes (Figure ). It bears a noticeable resemblance to electrode designs featuring channels or sponge like structures frequently proposed in literature . It can thus be used as a simplified model to represent three dimensional electrode geometries.…”

Section: Resultsmentioning

confidence: 93%

Optimal Geometric Parameters for 3D Electrodes in Bioelectrochemical Systems: A Systematic Approach

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As final remark, it should be noted that these conclusions are drawn in the general context of microbial anodes working in usual conditions, for instance anodes immersed in quiescent, or weakly stirred, solutions, which are currently the most usual operating conditions. Conclusions could be different if the anodes were implemented in specific reactor designs, for example as flow-through electrodes (Sleutels et al, 2011;Massazza et al, 2015Massazza et al, , 2018, granular packed bed electrodes (Aelterman et al, 2008;Rabaey et al, 2005a,b;Tran et al, 2010) or fluidized electrodes (Kong et al, 2011;Ren et al, 2014). Similarly, these conclusions may be modified when considering yeast-based anodes.…”

Section: Perspectivesmentioning

confidence: 99%

Effect of pore size on the current produced by 3-dimensional porous microbial anodes: A critical review

Chong

Erable

Bergel

2019

Bioresource Technology

View full text Add to dashboard Cite

Microbial anodes are the cornerstone of most electro-microbial processes. Designing 3-dimensional porous electrodes to increase the surface area of the electroactive biofilm they support is a key challenge in order to boost their performance. In this context, the critical review presented here aims to assess whether an optimal range of pore size may exist for the design of microbial anodes. Pore sizes of a few micrometres can enable microbial cells to penetrate but in conditions that do not favour efficient development of electroactive biofilms. Pores of a few tens of micrometres are subject to clogging. Sizes of a few hundreds of micrometres allow penetration of the biofilm inside the structure, but its development is limited by internal acidification. Consequently, pore sizes of a millimetre or so appear to be the most suitable. In addition, a simple theoretical approach is described to establish basis for porous microbial anode design.

show abstract

“…The presence of shear forces can induce the production of exopolysaccharides (EPSs) as well as detachment processes at the biofilm solution interface, which leads to the formation of more compact biofilms . Therefore, controlled application of shear forces can be used to control the biofilm thickness, and thus, avoid clogging even for electrodes consisting of relatively small structural elements . It can, however, be interesting to consider the case in which no or no significant shear forces are applied, particularly for MFCs used in wastewater treatment, for which the shear forces applied to biofilms tend to be relatively low and the additional energy required for sustained medium flow through an electrode would decrease the net power gain of the system.…”

Section: Introductionmentioning

confidence: 99%

“…[25] Therefore, controlled application of shear forces can be used to control the biofilm thickness, and thus, avoid clogging even for electrodes consisting of relativelys mall structurale lements. [28] It can, however,b ei nteresting to consider the case in whichn oo rn os ignificant shear forces are applied, particularly for MFCs used in wastewater treatment, for whicht he shear forces applied to biofilms tend to be relatively low [29] and the additional energy required for sustained medium flow through an electrode would decrease the net power gain of the system. In this case, the occurrence of clogging will This study analyzes the biofilm growth and long-term current production of mixed-culture, electrochemically activeb iofilms (EABs) on macrostructured electrodes under low-shear-force conditions.…”

Section: Introductionmentioning

confidence: 99%

The Limits of Three‐Dimensionality: Systematic Assessment of Effective Anode Macrostructure Dimensions for Mixed‐Culture Electroactive Biofilms

2019

View full text Add to dashboard Cite

This study analyzes the biofilm growth and long‐term current production of mixed‐culture, electrochemically active biofilms (EABs) on macrostructured electrodes under low‐shear‐force conditions. The channel dimensions were altered systematically in the range 400 μm to 2 mm, and the channel heights were varied between 1 and 4 mm to simulate macrostructures of different scales. Electrodes with finer‐structured surfaces produced higher current densities in the short term owing to their large surface area but were outperformed in the long term because the accumulation of biomass led to limitations of mass transfer into the structures. The best long‐term performance was observed for electrodes with channel dimensions of 1×4 mm, which showed no significant decrease in performance in the long term. Channels with a diameter of 400 μm were overgrown by the biofilm, which led to a transition from 3 D to 2 D behavior, indicating that structures of this scale might not be suitable for long‐term operation under low‐shear‐stress conditions.

show abstract

Layer-to-layer distance determines the performance of 3D bio-electrochemical lamellar anodes in microbial energy transduction processes

Cited by 13 publications

References 50 publications

Optimal Geometric Parameters for 3D Electrodes in Bioelectrochemical Systems: A Systematic Approach

Optimal Geometric Parameters for 3D Electrodes in Bioelectrochemical Systems: A Systematic Approach

Effect of pore size on the current produced by 3-dimensional porous microbial anodes: A critical review

The Limits of Three‐Dimensionality: Systematic Assessment of Effective Anode Macrostructure Dimensions for Mixed‐Culture Electroactive Biofilms

Contact Info

Product

Resources

About