electricity generation and biofilm formation in

Microbial community composition and electricity

Microbial fuel cell (MFC) is a sustainable technology to treat cattle manure slurry (CMS) for converting chemical energy to bioelectricity. In this work, two types of allochthonous inoculum including activated sludge (AS) and domestic sewage (DS) were added into the

[46] XZ Zhu, F Zhang, WW Li*, HQ Liu, YK Wang, MS Huang (2015) Forward osmosis membrane favors an improved proton flux and electricity generation in microbial fuel cells. Desalination, 372: 26-31. [47] F Zhang, SJ Yuan, WW Li *, JJ Chen, CC Ko*, HQ Yu (2015) WO 3 nanorods-modified carbon electrode for sustained electron uptake from Shewanella oneidensis MR-1 with suppressed biofilm formation.

Biofilm and Nanowire Production Leads to Increased

Biofilm formation. In order to better understand how G. sulfurreducens functions on the anode surface, inocula for microbial fuel cells were prepared by culturing as previously described in freshwater acetate (20 mM)-Fe(III) citrate (50 mM) medium and harvesting organisms in the late exponential phase by centrifugation under anaerobic conditions.

Enhanced Shewanella biofilm promotes bioelectricity

Such engineered Shewanella strains had significantly enhanced biofilm formation and bioelectricity generation. The MFCs inoculated with these engineered strains accomplished a maximum power density of 167.6 3.6 mW/m(2), which was ∼ 2.8 times of that achieved by the wild-type MR-1

Accelerating anodic biofilms formation and electron

Anodic biofilm formation was facilitated after dosing 40mg/L of rhamnolipids on the 7th day after inoculation, resulting in an increased anodic biofilm coverage from 0.43% to 42.51%, and an increased maximum power density from 6.921.18W/m3 to 9.930.88W/m3.

Frontiers

Shear stress is an important factor that affects the formation and structure of anode biofilms, which are strongly related to the extracellular electron transfer phenomena and bioelectric performance of bioanodes. Here, we show that using nitrogen sparging to induce shear stress during anode biofilm formation increases the linear sweep voltammetry peak current density of the mature anode

Microbial electricity generation via microfluidic flow

We present a ‐scale, biological fuel cell which utilizes microbial electricity generation enabled by microfluidic flow control to produce power. The new fuel cell, the smallest of its kind, with a total volume of 0.3 L, produces scalable and controllable electrical energy from organic matter which is sustained through microbial respiration and laminar flow separation of the electrolytes.

Calcium

Calcium (CaSUP2+/SUP) plays an important role in guaranteeing the formation and structure of microbial biofilm. However, little is known regarding its influence on the structure and electron transfer properties of electroactive biofilms (EABs). In this study, advanced investigative techniques such as microscopy and electrochemistry are employed to characterize biofilm structure and

Electricity generation by a baffle

Microbial fuel cells (MFCs) for organic waste and wastewater treatment represent innovative technologies for pollution control and energy generation. The research reported here considers the influence of reactor configurations designed to mitigate the impact of oxygen transport on electricity generation by a baffle-chamber membraneless MFC. The reactor was constructed to reduce mixing in the

(PDF) Electricity production and microbial biofilm

Because there are no known 2007a), but the treatment and energy recovery from microorganisms that can both use cellulose as an electron doi: 10.2166/wst.2008.431 618 Z. Ren et al. | Electricity production and biofilm characterization in

Quorum Sensing in Pseudomonas aeruginosa and Its Relationship to Biofilm

biofilm formation, biodegradation of pollutants, and electricity generation (13). During chronic infections, P. aeruginosa forms biofilms, or adherent bacterial communities surrounded by an extracellular matrix composed primarily of exopolysaccharides, proteins

Microbial community composition and electricity

Microbial fuel cell (MFC) is a sustainable technology to treat cattle manure slurry (CMS) for converting chemical energy to bioelectricity. In this work, two types of allochthonous inoculum including activated sludge (AS) and domestic sewage (DS) were added into the MFC systems to enhance anode biofilm formation and electricity generation. Results indicated that MFCs (AS + CMS) obtained the

Effects of biofilm transfer and electron mediators transfer

2020/9/21Effect of anode biofilm on electricity generation performance of MFCs Figure 3 reveals that the formation of the biofilm on anode electrode surface by SEM. Results clear showed that almost no EAB were attached to the carbon paper surface in coated-MFC (Fig. 3

Molecules

Studies have shown that biofilm formation and colonization is promoted by rough surfaces due to the presence of beneficial local environments and the increased opportunities for biofilm formation. For example, the pockets in rough surfaces provide a protective habitat with reduced shear stress [ 47 ].

Pharmaceutical wastewater treatment associated with renewable energy generation in microbial fuel cell based on mobilized electroactive biofilm

Pharmaceutical wastewater treatment associated with renewable energy generation in microbial fuel cell based on mobilized electroactive biofilm Zainab Z. Ismail* Department of Environmental Engineering, Baghdad University Baghdad, Iraq And Ali A. Habeeb

Functional group surface modifications for enhancing the

In this review, the effects of anode functional groups on electroactive bacteria through the whole biofilm formation process are summarized. In addition, the application of those modification technologies to improve bioelectricity generation, resource recovery, bioelectrochemical analysis and the production of value-added chemicals and biofuels is also discussed.

Frontiers

Biofilm Formation Under Static Conditions Cultures resulting from the growth curve were used to evaluate biofilm production by crystal violet staining ().The results show that the overexpression of bolA leads to an increase in biofilm production, with significant differences (unpaired t-test p 0.05) found between the WT and both the WT+ and ΔbolA+.

Formation of industrial mixed culture biofilm in

The formation of microbial biofilm while maintaining the electricity output is a challenging topic in microbial fuel cell (MFC) studies. This MFC critical factor becomes more significant when handling with industrial wastewater which normally contains refractory and toxic compounds. This study explores the formation of industrial mixed culture biofilm in chlorophenol cultivated medium through

Biofilm evolution and viability during in situ preparation of

The electricity generation performance of the MFC was found to follow the same trend as biofilm evolution. The power density of the mrGO-modified MFC increased sharply after five electricity production cycles, reaching a maximum value of 1140.63 mW m −2,

Effect of biofilm formation on the performance of

Anode biofilm is a crucial component in microbial fuel cells (MFCs) for electrogenesis. Better knowledge about the biofilm development process on electrode surface is believed to improve MFC performance. In this study, double-chamber microbial fuel cell was operated with diluted POME (initial COD = 1,000 mg L−1) and polyacrylonitrile carbon felt was used as electrode. The maximum power

Less biomass and intracellular glutamate in anodic

Excessive biofilm formation on the anode likely weakens the competitive advantage of Geobacter cells on acetate. Thus, it will be effective to inhibit excessive biomass formation on the anodic electrode forcibly, to achieve higher electricity generation.

Functional group surface modifications for enhancing the

In this review, the effects of anode functional groups on electroactive bacteria through the whole biofilm formation process are summarized. In addition, the application of those modification technologies to improve bioelectricity generation, resource recovery, bioelectrochemical analysis and the production of value-added chemicals and biofuels is also discussed.

Microbial Fuel Cell Biofilms

Biofilm Formation The formation of a biofilm is initiated by an attachment and growth of a cell on a surface . Attachment is aided by expression of Exopolymers that adhere to a surface . As the biofilm grows it spreads along a surface and grows in thickness.

A miniature microbial fuel cell with conducting

2015/11/3To measure the electricity generation capability of the MFC device, an external resistor was connected between the anode and cathode to form a closed circuit. The voltage potential U between the two electrodes was measured using a digital multimeter (Agilent 34401A; Santa Clara, CA) connected to a computer through an RS-232 port.

Understanding and engineering electrochemically active

2019/3/7Since the formation of biofilm is considered to facilitate electric interactions of MR-1 with solid Feng X, He Z (2016) 13 C pathway analysis for the role of formate in electricity generation by Shewanella oneidensis MR-1 using lactate in microbial fuel cells. Sci

Frontiers

Shear stress is an important factor that affects the formation and structure of anode biofilms, which are strongly related to the extracellular electron transfer phenomena and bioelectric performance of bioanodes. Here, we show that using nitrogen sparging to induce shear stress during anode biofilm formation increases the linear sweep voltammetry peak current density of the mature anode

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