Effects of vertical and horizontal configurations of different numbers of brush anodes on performance and electrochemistry of microbial fuel cells

Nam, Taehui; Kang, Heunggu; Pandit, Soumya; Kim, Jun Seok; Yoon, Sangho; Bae, Sungjun; Kim, Eun Jung

doi:10.1016/j.jclepro.2020.124125

Cited by 50 publications

(15 citation statements)

References 39 publications

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“…[7][8][9] 이에 따라 에너지관련 기술 은 사용 에너지의 절약 및 누수 에너지 방지에 초점을 둔 연구 개발로 점차 확대되고 있는데, 그 중에서도 특히 상전이 물질 을 응용한 열 저장 시스템은 그 무공해성, 지속가능성, 높은 열 저장 밀도로 에너지 활용에 관해 무한한 가능성을 갖는 것으로 평가된다. 10,11,26,27) 상전이 물질(Phase change material, PCM)은 높은 잠열 용 량을 갖고 있으며, 고체에서 액체, 액체에서 기체 등, 하나의 상태에서 또 다른 상태로 변하는 과정에서 열을 축적하거나 저장한 열을 방출하는 물질을 말한다. 12) 물질의 상 변화에 수반되는 잠열로 저장을 하면 열 저장매체의 부피와 그에 따 른 공간이 매우 작아지고 일정한 온도에서 열을 방출 또는 흡수할 수 있는 장점이 있다.…”

Section: 서 론unclassified

Development of Inorganic Impregnated Phase Change Material(PCM) in the Pores of Activated Carbon

Baek¹,

Ghaffari²,

Bae³

et al. 2021

J Korean Soc Environ Eng

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Objectives : Recently, energy-related research has shifted from developing alternative energy to the efficient management technology of the produced energy. As an alternative, research on phase change materials (PCMs) capable of absorbing and releasing heat as an energy medium has been conducted. This study developed a more efficient heat storage medium using activated carbon as a medium for the phase change material. At the same time, we developed a method for efficiently impregnating the phase change material into the activated carbon pores.Methods : The activated carbon used in this experiment was charcoal powder activated carbon (250-350 mesh) and granular activated carbon. The inorganic phase change materials used in the experiment was manganese nitrate hexahydrate. The method for impregnating the phase change material was pressurization method and dilution method. The heat absorption / emission capacity of the developed material was examined within the range of 10℃ to 50℃.Results and Discussion : The Scanning electron microscope (SEM) and Transmission electron microscopy energy-dispersive X-ray spectroscopy (TEM-EDX) analysis showed that the phase change material was filled in the pore of activated carbon. When the phase change material is filled by the pressurized method, the material properties of manganese nitrate hexahydrate are reflected, resulting in absorption and release of heat at each phase change temperature. As a result of experiments for the selection of the optimum solvent in the phase change material filling study using the dilution method, when ethanol was used as the solvent, the heat absorption was clearly observed even after the phase change material was loaded. As a result of selecting the optimal dilution ratio, the ratio of ethanol was determined to be 1:1 as the dilution ratio with the lowest amount of floating activated carbon. The optimal solvent removal method experimental results show that the heat absorption/release section occurred when the ethanol was removed by evaporation at 85℃ temperature.Conclusions : 1) Both the pressurization method and the dilution method are filling methods in which inorganic phase change materials can be immobilized inside activated carbon, and heat absorption and release characteristics are maintained even after loading. 2) The heat absorption release was maintained for ethanol and the optimal dilution ratio was 1:1. 3) In case of the dilute solvent removal method, the heat absorption/release capacity was maintained when the solvent was removed using only the vaporization method.

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Section: 서 론unclassified

Development of Inorganic Impregnated Phase Change Material(PCM) in the Pores of Activated Carbon

Baek¹,

Ghaffari²,

Bae³

et al. 2021

J Korean Soc Environ Eng

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“…4 NPs also had effects on sucrase activities in CWs. Li et al also held the view that sucrase activity was positively correlated with the rate of C mineralization and accelerate COD removal…”

mentioning

confidence: 93%

“…Therefore, effective wastewater management and treatment are critical for maintaining public health and environmental safety [3]. The scarcity of useable water necessitates sustainable wastewater treatment techniques, such as microbial fuel cell [4][5][6]. However, its upscaling is challenging primarily due to its capital expense and CWs are considered as an alternative to sewage treatment.…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance of constructed wetlands by incorporating magnetic Fe3O4 nanoparticles and the effects on the microbial community on the surface of the substrate

Zhou

2021

Environmental Engineering Research

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Constructed wetlands (CWs) have been successfully employed to treat domestic sewage, while it is reported that inconsistent and low nutrient removal efficiency has been achieved. Due to the good performance in other treatment systems, magnetic Fe3O4 nanoparticles (Fe3O4 NPs) can provide a new pathway for the nutrient removal in CWs. In this study, the influences of Fe3O4 NPs on the nutrient removal and variation of microbial community were investigated. The CWs with Fe3O4 had better NH4+-N (ammonia nitrogen, 95.9%), NO3--N (nitrate nitrogen, 83.8%), and TP (total phosphorus, 90.4%) removal percentages than that without Fe3O4. High-throughput sequencing analysis indicated that the microbial community structure could be changed by Fe3O4 NPs. For example, at class level, the major bacteria such as Betaproteobacteria, Gammaproteobacteria and Deltaproteobacteria were promoted by Fe3O4 NPs. On the other hand, at genus level, some abundant genera disappeared, while other abundant genera became dominant in CWs with Fe3O4 NPs, including Desulfuromonas (3.0%), Azospirillum (1.9%), Chryseolinea (1.5%), and Desulfomicrobium (1.8%). The latter genera essentially improved the microbial community involved in the nitrogen removal. Therefore, the CWs with Fe3O4 NPs showed higher NH4+-N and NO3--N removal percentages than that without Fe3O4 NPs.

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“…Anode performance can be enhanced using a better catalyst, anode structure, and anode configuration. 24 − 29 It is well known that electrode materials have a great influence on the power generation and pollution control of MFCs. Research has shown that properly changing the number of anodes can improve the power generation capacity.…”

Section: Introductionmentioning

confidence: 99%

“…There are many limiting factors influencing internal resistance. − The cathode, anode, pH, appropriate catalysts (activated carbon, cobalt-nitrogen framework), and external resistance are important limiting factors for the performance of the MFC. − Among the many factors that affect its electricity production, the anode is considered to be a key factor because it affects the microorganism growth and metabolism of full stop. Anode performance can be enhanced using a better catalyst, anode structure, and anode configuration. − It is well known that electrode materials have a great influence on the power generation and pollution control of MFCs. Research has shown that properly changing the number of anodes can improve the power generation capacity. − Different arrangements (voltage series and parallel and biomass series and parallel) can increase the voltage of microbial fuel cells to different degrees .…”

Section: Introductionmentioning

confidence: 99%

Effect of the Anode Structure on the Performance of Oily Sludge Sediment Microbial Fuel Cells

Guo

Huang

et al. 2022

ACS Omega

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The anode is considered to be a key factor to improve the single-chamber bioelectrochemical system’s efficiency to degrade oily sludge in sediment while generating electricity. There are few studies on the effect of the anode structure on the performance of oily sludge MFCs systematically. In this paper, an oily sludge bioelectrical system was constructed using carbon felt and carbon plate as anode materials, adjusting the anode material arrangement as transverse and longitudinal, and using different anode materials from single to sextuple anodes. The results of this study showed that the rate of degradation of oily sludge was greater with carbon felt (17.04%) than with the carbon plate (13.11%), with transverse (23.61%) than with the longitudinal (19.82%) arrangement of anodes, and with sextuple anodes (33.72%) than with a single anode (25.26%) in the sediment microbial fuel cells (SMFCs). A similar trend was observed when the voltage, power density, and electromotive force (EMF) of SMFCs were estimated between the carbon felt and carbon plate, transverse and longitudinal arrangements, single and sextuple anodes. It is concluded that the proper adjustment of anode arrangements, using carbon felt as an anode material, and increasing the number of anodes to six may accelerate the rate of degradation of oily sludge in oily sludge sediment microbial fuel cells (SMFCs). Furthermore, the electricity generation performance was also improved.

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Effects of vertical and horizontal configurations of different numbers of brush anodes on performance and electrochemistry of microbial fuel cells

Cited by 50 publications

References 39 publications

Development of Inorganic Impregnated Phase Change Material(PCM) in the Pores of Activated Carbon

Development of Inorganic Impregnated Phase Change Material(PCM) in the Pores of Activated Carbon

Enhanced performance of constructed wetlands by incorporating magnetic Fe3O4 nanoparticles and the effects on the microbial community on the surface of the substrate

Effect of the Anode Structure on the Performance of Oily Sludge Sediment Microbial Fuel Cells

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