Influence of sludge age on the performance of MFC treating winery wastewater

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

doi:10.1016/j.chemosphere.2016.01.030

Cited by 49 publications

(30 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of the amount of microorganism presents. 16 As can be seen, the VSS increases with the HRT, attaining a maximum value at an HRT of 7.5 d. Based on this, the larger amount of microorganisms are the primary explanation for the better COD removal performance achieved at the HRT of 7.5 d. Long HRTs result in an insufficient organic loading rate, disfavoring the bacterial activity and growth. At short HRTs, the organic matter availability may no longer be the limiting factor, but the limited activity and growth rate of the microbes lead to the observed plateau in the VSS and the increase in the final COD at the HRT of 6.4 and 4.8 d.…”

Section: Resultsmentioning

confidence: 84%

See 1 more Smart Citation

The Hydraulic Retention Time as a Key Parameter for the Performance of a Cyclically Fed Glycerol-Based Microbial Fuel Cell from Biodiesel

Santos

Barros

Linares

2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

This study focuses on the importance of the feed volume as an operational parameter for improving the performance of a cyclically fed glycerol-based microbial fuel cell. Experiments varying the daily feed volume from 10 to 50 mL for a 240 mL anode evidences that the electrochemical performance, Chemical Oxygen Demand (COD) and nitrogen and phosphorous removal is affected, in addition to the Coulombic efficiency (CE) and the kinetics of the glycerol biodegradation. A feed volume of 32 mL (hydraulic retention time (HRT) of 7.5 d) is shown to be the most effective for maximising the cell performance and COD removal. Longer HRTs reduce the organic loading rate, thereby reducing the cell performance due to the rapid depletion of the substrate, whereas shorter HRTs favor the development of non-exoelectrogenous bacteria, which reduces the CE and electrochemical performance with less effective COD removal. A final product analysis reveals that formic acid is the main product formed as a consequence of the microbiological degradation of glycerol.

show abstract

Section: Resultsmentioning

confidence: 84%

“…16 Among the first type of parameters, the organic loading rate (OLR) 17,18 and sludge age (SA) 16 are the most influential parameters. The OLR can be regulated through the substrate concentration and/or the feed influent flowrate.…”

mentioning

confidence: 99%

The Hydraulic Retention Time as a Key Parameter for the Performance of a Cyclically Fed Glycerol-Based Microbial Fuel Cell from Biodiesel

Santos

Barros

Linares

2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…As observed in Figures a and b, any modification in SA reduces the CCV when compared with the CCV reference value at a SA of 24 d which was the reference used in our previous study of the influence of HRT . The important influence of SA on the electrochemical performance has been reported in the literature and is based on the evidence that SA directly influences the composition of the microbial consortia in the anodic compartment . Based on this argument, the EGMs develop more favorably with the application of a SA of 24 d. In this case, a large amount of redox mediator (mediated electron transfer, MET) may be produced by the suspended EGM.…”

Section: Resultsmentioning

confidence: 99%

“…Another parameter with a marked influence on the performance of an MFC is the sludge age (SA). This was demonstrated by the research group of M. A. Rodrigo . One important aspect that they highlighted in their studies was that a change in the SA directly affected the solids suspended in the anodic compartment, but not the microorganisms attached to the anode forming the biofilm .…”

Section: Introductionmentioning

confidence: 99%

Influence of Sludge Age on the Performance of a Cyclically Fed Microbial Fuel Cell Using Glycerol from Biodiesel

2018

View full text Add to dashboard Cite

This study focuses on the influence of sludge age (SA) on the production of electricity from a cyclically fed glycerol–based microbial fuel cell. Under the same hydraulic retention time, different volumes of sludge were extracted from the anode compartment, thereby modifying the SA. Such changes affect the electrochemical performance, the organic matter biodegradation and consequently, the coulombic efficiency. A sludge volume of 0.01 L (corresponding to a SA of 24 d) appears to be optimal, because this favors the development of electricity–generating microorganisms (EGM). Shorter SA times wash EGM out of the system and promote growth of the fermenter (mainly acidogenic bacteria), whereas a longer SA reduces the microbial population. A final product analysis identified that short SAs provide favorable conditions in which higher concentrations of short–chain organic acids are detected.

show abstract

“…Microbial fuel cells (MFCs) have been well studied since the discovery of the ability of many microorganisms to donate electrons to an electrode, which opened the possibility of using these microorganisms to harvest the energy contained in the organic matter of wastewater. A lot of effort has been made from that moment, most related to study of the influence on the performance of the MFCs of electrodic materials,, cell design, carbon source and concentration of the fuel fed,, catalysts, origin of the sludge seeded, external resistance, environmental and operational conditions, decrease of the internal resistance and tolerance to real wastewaters. However, after some decades, the production of electricity yielded by individual MFCs is rather low and the key points to increase the productivity seem to be miniaturization of the MFC and then later stacking of individual mini‐cells and the development of very efficient electrogenic communities …”

Section: Introductionmentioning

confidence: 99%

Effect of sludge age on microbial consortia developed in MFCs

Mateo

Zamorano-López

Borrás

et al. 2017

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

BACKGROUND This work is focused on the assessment of the performance of mini‐scale air‐breathing microbial fuel cells (MFCs), by monitoring the evolution of the bio‐electrogenic activity for a period of 40 days and by comparing the microorganisms populations developed in each of the MFCs after this period. RESULTS Five MFCs were operated at sludge ages ranging from 1.4 to 10.0 days. Results showed the superb performance of the MFC operating under a sludge age of 2.5 days. Desulfuromonas, Syntrophothermus, Solitalea, Acholeplasma, Propionicimonas, Desulfobacula and Sphaerochaeta are proposed as potentially responsible for the bio‐electrogenic activity. CONCLUSIONS Microbial population analysis through Illumina amplicon sequencing demonstrated that despite all MFCs being seeded with the same mixed culture inoculum, the biological cultures developed in the suspension and the biofilm are completely different and depend strongly on sludge age. © 2017 Society of Chemical Industry

show abstract

Influence of sludge age on the performance of MFC treating winery wastewater

Cited by 49 publications

References 21 publications

The Hydraulic Retention Time as a Key Parameter for the Performance of a Cyclically Fed Glycerol-Based Microbial Fuel Cell from Biodiesel

The Hydraulic Retention Time as a Key Parameter for the Performance of a Cyclically Fed Glycerol-Based Microbial Fuel Cell from Biodiesel

Influence of Sludge Age on the Performance of a Cyclically Fed Microbial Fuel Cell Using Glycerol from Biodiesel

Effect of sludge age on microbial consortia developed in MFCs

Contact Info

Product

Resources

About