Optimization of the performance of a microbial fuel cell using the ratio electrode-surface area / anode-compartment volume

Penteado, Eduardo Dellosso; Fernández-Marchante, Carmen M.; Zaiat, Marcelo; González, Ernesto Rafael; Rodrigo, Manuel A.

doi:10.1590/0104-6632.20180351s20160411

Cited by 34 publications

(7 citation statements)

References 33 publications

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“…For maximum PD, the attainable CD and SRE were 6.98 A/m 2 and 46.4%, respectively. Table 2 shows that maximizing CD will also maximize SRE (i.e., the two objectives are not conflicting), this is also clear from Equation (23), which is obtained from a combination of Equations (5) and (13) at a steady state. This equation is valid for CD that satisfies the design equations above:…”

Section: Single-objective Optimizationmentioning

confidence: 91%

Single- and Multi-Objective Optimization of a Dual-Chamber Microbial Fuel Cell Operating in Continuous-Flow Mode at Steady State

Abu-Reesh

2020

Processes

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Microbial fuel cells (MFCs) are a promising technology for bioenergy generation and wastewater treatment. Various parameters affect the performance of dual-chamber MFCs, such as substrate flow rate and concentration. Performance can be assessed by power density ( PD ), current density ( CD ) production, or substrate removal efficiency ( SRE ). In this study, a mathematical model-based optimization was used to optimize the performance of an MFC using single- and multi-objective optimization (MOO) methods. Matlab’s fmincon and fminimax functions were used to solve the nonlinear constrained equations for the single- and multi-objective optimization, respectively. The fminimax method minimizes the worst-case of the two conflicting objective functions. The single-objective optimization revealed that the maximum PD , CD , and SRE were 2.04 W/m2, 11.08 A/m2, and 73.6%, respectively. The substrate concentration and flow rate significantly impacted the performance of the MFC. Pareto-optimal solutions were generated using the weighted sum method for maximizing the two conflicting objectives of PD and CD in addition to PD and SRE simultaneously. The fminimax method for maximizing PD and CD showed that the compromise solution was to operate the MFC at maximum PD conditions. The model-based optimization proved to be a fast and low-cost optimization method for MFCs and it provided a better understanding of the factors affecting an MFC’s performance. The MOO provided Pareto-optimal solutions with multiple choices for practical applications depending on the purpose of using the MFCs.

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Section: Single-objective Optimizationmentioning

confidence: 91%

Single- and Multi-Objective Optimization of a Dual-Chamber Microbial Fuel Cell Operating in Continuous-Flow Mode at Steady State

Abu-Reesh

2020

Processes

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“…An MFC was first enriched using SWW (COD 1000 mg l −1 ) at pH 6Á5 buffered with 100 mmol l −1 phosphate to replicate the conditions reported in the literature (Penteado et al 2016a(Penteado et al , 2016b(Penteado et al , 2017a(Penteado et al , 2017b(Penteado et al , 2018. After attaining steady state performance at 6Á5, the pH was increased from 6Á5 to 7Á5 and monitored for 2 weeks documenting steady state at this pH.…”

Section: Experimental Determination Of Effects Of Phmentioning

confidence: 99%

“…MFC application to winery wastewater treatment has been studied to some extent (Cusick et al 2010;Rengasamy and Berchmans 2012;Penteado et al 2016aPenteado et al , 2016bPenteado et al , 2017aPenteado et al , 2017bPenteado et al , 2018. These studies focused on the feasibility of using MFC technology for winery effluent treatment (Rengasamy and Berchmans 2012;Penteado et al 2017b), the effect of sludge age (Penteado et al 2016a), anode materials (Penteado et al 2017a(Penteado et al , 2017b and electrode-surface area/anode-compartment volume ratio (ESAVR) (Penteado et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Narrow pH tolerance found for a microbial fuel cell treating winery wastewater

et al. 2021

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Aims: The use of microbial fuel cells (MFC) to treat winery wastewater is promising; however, an initial acidic pH, fluctuating chemical oxygen demand (COD) levels and a lack of natural buffering in these wastewaters make providing a suitable buffer system at an ideal buffer to COD ratio. Methods and Results: A lab scale MFC was designed, inoculated with anaerobic winery sludge and fed with synthetic winery wastewater. It was observed that at pH 6Á5, the MFC performed best, the maximum output voltage was 0Á63 AE 0Á01 V for 60 AE 3 h, and the COD removal efficiency reached 77 AE 7%. The electrogens were affected by pH much more than the bulk COD degrading organisms. Fluorescent in situ hybridization suggested Betaproteobacteria played a significant role in electron transfer. Conclusions: A ratio of 1 mmol l −1 phosphate buffer to 100 mg l −1 COD was ideal to maintain a stable pH for MFCs treating synthetic winery wastewater. Significance and Impact of the Study: The results find the narrow pH tolerance for MFCs treating winery wastewater and demonstrate the significance of pH and buffer to COD ratio for steady performance of MFCs.

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“…Recently, it was reported that the performance of MFCs which were equipped with cost-effective anodes made of different carbon materials (carbon felt, foam, and cloth) demonstrated that the carbon felt anode was the most efficient whereas the least efficient was the carbon cloth. Performance seems to be in direct relationship with the specific area of the anode materials [38][39][40][41][42]. We examined a new concept of microbial anode made of carbon cloth which differs in two ways: the carbon cloth anode was attached to a rigid conductive stainless-steel material, and the carbon cloth anode was also modified by plasma irradiation.…”

Section: Lsv Measurements Of the Bioanodesmentioning

confidence: 99%

Improvement of Microbial Electrolysis Cell Activity by Using Anode Based on Combined Plasma-Pretreated Carbon Cloth and Stainless Steel

et al. 2019

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The anode activity in a microbial electrolysis cell (MEC) is known to be a limiting factor in hydrogen production. In this study, the MEC was constructed using different anode materials and a platinum-coated carbon-cloth cathode (CC). The anodes were comprised of CC, stainless steel (SS), and a combination of the two (COMB). The CC and SS anodes were also treated with plasma to improve their surface morphology and hydrophilic properties (CCP and SSP, respectively). A combined version of CCP attached to SS was also applied (COMBP). After construction of the MEC using the different anodes, we conducted electrochemical measurements and examination of biofilm viability. Under an applied voltage of 0.6 V (Ag/AgCl), the currents of a MEC based on CCP and COMBP were 11.66 ± 0.1331 and 16.36 ± 0.3172 A m−2, respectively, which are about three times higher compared to the untreated CC and COMB. A MEC utilizing an untreated SS anode exhibited current of only 0.3712 ± 0.0108 A m−2. The highest biofilm viability of 0.92 OD540 ± 0.07 and hydrogen production rate of 0.0736 ± 0.0022 m3 d−1 m−2 at 0.8 V were obtained in MECs based on the COMBP anode. To our knowledge, this is the first study that evaluated the effect of plasma-treated anodes and the use of a combined anode composed of SS and CC for hydrogen evolution in a MEC.

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Optimization of the performance of a microbial fuel cell using the ratio electrode-surface area / anode-compartment volume

Cited by 34 publications

References 33 publications

Single- and Multi-Objective Optimization of a Dual-Chamber Microbial Fuel Cell Operating in Continuous-Flow Mode at Steady State

Single- and Multi-Objective Optimization of a Dual-Chamber Microbial Fuel Cell Operating in Continuous-Flow Mode at Steady State

Narrow pH tolerance found for a microbial fuel cell treating winery wastewater

Improvement of Microbial Electrolysis Cell Activity by Using Anode Based on Combined Plasma-Pretreated Carbon Cloth and Stainless Steel

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