A horizontal plug flow and stackable pilot microbial fuel cell for municipal wastewater treatment

Feng, Yujie; He, Weihua; Liu, Jia; Wang, Xin; Qu, Youpeng; Ren, Nanqi

doi:10.1016/j.biortech.2013.12.104

Cited by 257 publications

(80 citation statements)

References 35 publications

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“…The reactor system was capable of sustaining the high removal rates irrespective of the HRT or pollutant loading rates throughout the long-term operation (more than 100 days); hence indicating the robustness of the reactor system. These observations are consistent with results reported previously for petroleum hydrocarbons or organic pollutant removal at different HRTs in MFC systems (Zhang et al, 2012d;Li et al, 2013;Feng et al, 2014;Akman et al, 2013;Kuscu and Sponza, 2009). The MFC system was operated at ambient temperature and temperature fluctuations had little or no apparent effect on petroleum hydrocarbon removal efficiency throughout the period of continuous MFC operation, even during winter period.…”

Section: Resultssupporting

confidence: 93%

“…As previously discussed in section 3.1.1, high HRT infers more contact time between the microbes and the substrate within the MFC reactor which may have reflected in higher COD removal efficiency observed at higher HRT of 30 h compared to 10 h. Similar observations have been reported by numerous authors in previous studies on the effect of HRTs on MFC performance (Gong and Qin, 2012;Zhang et al, 2012d;Li et al, 2013;Feng et al, 2014). As indicated in Fig.…”

Section: Performance Under Copiotrophic (Substrate) Conditionssupporting

confidence: 83%

“…Notably, the MFC effluent at HRT 10 d indicated a marked increase in the EC 50 value (587 mgCOD L -1 ) suggesting a significant (p < 0.01, ANOVA) reduction in toxicity compared to both MFC influent and MFC effluent at HRT 2d. A possible explanation for this significant decrease in toxicity of the MFC effluent at HRT 10 d which was approximately 4-fold lower compared to the influent could be attributed to longer residence time between the microbes and the substrate within the reactor thus leading to further breakdown of the metabolic products into less harmful products with very low cytotoxicity effects (Li et al, 2013;Feng et al, 2014). Interestingly, the low EC 50 value (high toxicity) of the petroleum hydrocarbon contaminated wastewater influent suggests that the presence of unreduced petroleum hydrocarbons (in this case, the presence of unreduced form of phenanthrene and benzene) in high concentrations may contribute to high environmental toxicity and can be carcinogenic in nature due to high degree of aromaticity (Cho et al, 2004;Juana et al, 1998).…”

Section: Toxicity Reduction During Mfc Operationmentioning

confidence: 99%

See 2 more Smart Citations

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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Bioelectrochemical systems could have potential for bioremediation of contaminants either in situ or ex situ. The treatment of a mixture of phenanthrene and benzene using two different tubular microbial fuel cells (MFCs) designed for either in situ and ex situ applications in aqueous systems was investigated over long operational periods (up to 155 days). For in situ deployments, simultaneous removal of the petroleum hydrocarbons (>90% in term of degradation efficiency) and bromate, used as catholyte, (up to 79 %) with concomitant biogenic electricity generation (peak power density up to 6.75 mWm -2 ) were obtained at a hydraulic retention time (HRT) of 10 days. The tubular MFC could be operated successfully at copiotrophic (100 ppm phenanthrene, 2000 ppm benzene at HRT 30 days) and oligotrophic (phenanthrene and benzene, 50 ppb each, HRT 10 days) substrate conditions suggesting its effectiveness and robustness at extreme substrate concentrations in anoxic environments. In the MFC designed for ex situ deployments, optimum MFC performance was obtained at HRT of 30 h giving COD removal and maximum power output of approximately 77% and 6.75 mWm -2 respectively. The MFC exhibited the ability to resist organic shock loadings and could maintain stable MFC performance. Results of this study suggest the potential use of MFC technology for possible in situ/ex situ hydrocarbon-contaminated groundwater treatment or refinery effluents clean-up, even at extreme contaminant level conditions.

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Section: Resultssupporting

confidence: 93%

Section: Performance Under Copiotrophic (Substrate) Conditionssupporting

confidence: 83%

Section: Toxicity Reduction During Mfc Operationmentioning

confidence: 99%

See 1 more Smart Citation

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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“…One of the major challenges for MFC development is system scaling up. There have been efforts to enlarge MFCs to a scale of several hundred liters for treating actual wastewater [5]. Despite a preliminary analysis in a recent study that the capital cost of MFC systems could be lower than some small-scale wastewater treatment facilities [6], it is generally acknowledged that MFCs systems are expensive [7,8]; thus it is of great interest to explore cost-effective materials for MFC development.…”

Section: Introductionmentioning

confidence: 99%

Ni-Coated Carbon Fiber as an Alternative Cathode Electrode Material to Improve Cost Efficiency of Microbial Fuel Cells

Luo

2016

Electrochimica Acta

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Keywords:Microbial fuel cell cathode electrode material Ni-coated carbon fiber electrochemical analysis cost efficiency A B S T R A C T Electrode material is a key component in microbial fuel cells (MFCs), and exploring cost-effective electrode materials will greatly help with MFC development, especially the scaling up. In this study, a commercially available material -nickel-coated carbon fiber (Ni-CF) has been investigated as an alternative cathode electrode material to carbon cloth (CC). Both three-electrode cell and MFC tests are carried to examine electrochemical performance and actual electricity generation of the prepared cathode electrodes. It is found that Ni-CF exhibited higher current generation in linear sweep voltammetry (LSV) and lower resistance in electrochemical impedance spectroscopy (EIS) tests than those of CC and CF. When being coated with AC, Ni-CF has the highest actual loading amount among the tested materials. As a result, AC/Ni-CF leads to lower charge transfer resistance (95.1 V) and higher current density (8.07 mA m À2 ) than AC/CC (115.3 V and 3.40 mA m À2 ). In the MFC test, the cathode using AC/Ni-CF results in the maximum power density of 6.50 W m À3 , higher than AC/CC at 4.29 W m À3 . This high power output gives cost efficiency of AC/Ni-CF at 299.0 mW $ À1 , nearly twice that of AC/CC (151.7 mW $ À1 ). The initial AC coating amount of 4 g is found to be the optimal amount to achieve optimally actual AC loading amount on the cathode electrode with balanced catalytic ability and (possible) oxygen transfer. Those results encourage further investigation of Ni-CF for MFC applications towards improved performance and cost efficiency.

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“…Miyamoto et al have previously proposed a system for the conversion of algae biomass to H 2 using photosynthetic bacteria [107]. In addition to water treatment applications, microbes can decompose organics to generate energy, which is called a microbial fuel fell (MFC) [108,109]. …”

Section: Microbiotamentioning

confidence: 99%

Recent biomedical applications of bio-sourced materials

Elbaz

Gao

et al. 2018

Bio-des. Manuf.

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Natural anisotropic nanostructures occurring in several organisms have gained more and more attention because of their obvious advantages in sensitivity, stability, security, miniaturization, portability, online use, and remote monitoring. Due to the development of research on nature-inspired bionic structures and the demand for highly efficient, low-cost microfabrication techniques, an understanding of and the ability to replicate the mechanism of structural coloration have become increasingly significant. These sophisticated structures have many unique functions and are used in many applications. Many sensors have been proposed based on their novel structures and unique optical properties. Several of these bio-inspired sensors have been used for infrared radiation/thermal, pH, and vapor techniques, among others, and have been discussed in detail, with an intense focus on several biomedical applications. However, many applications have yet to be discovered. In this review, we will describe these nanostructured materials based on their sources in nature and various structures, such as layered, hierarchical, and helical structures. In addition, we discuss the functions endowed by these structures, such as superhydrophobicity, adhesion, and high strength, enabling them to be employed in a number of applications in biomedical fields, including cell cultivation, biosensors, and tissue engineering.

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A horizontal plug flow and stackable pilot microbial fuel cell for municipal wastewater treatment

Cited by 257 publications

References 35 publications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Ni-Coated Carbon Fiber as an Alternative Cathode Electrode Material to Improve Cost Efficiency of Microbial Fuel Cells

Recent biomedical applications of bio-sourced materials

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