COD removal characteristics in air-cathode microbial fuel cells

Xiaoyuan Zhang; Weihua He; Lijiao Ren; Jennifer Stager; Patrick J. Evans; Bruce E. Logan

doi:10.1016/j.biortech.2014.11.001

COD removal characteristics in air-cathode microbial fuel cells

Xiaoyuan Zhang, Weihua He, Lijiao Ren, Jennifer Stager, Patrick J. Evans, Bruce E. Logan

Research output: Contribution to journal › Article › peer-review

228 Scopus citations

Abstract

Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h^-¹, which was higher than acetate or filtered WW with an open circuit (0.10h^-¹), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.

Original language	English (US)
Pages (from-to)	23-31
Number of pages	9
Journal	Bioresource technology
Volume	176
DOIs	https://doi.org/10.1016/j.biortech.2014.11.001
State	Published - Jan 1 2015

All Science Journal Classification (ASJC) codes

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.biortech.2014.11.001

Cite this

@article{eeb225818f724609b77f0387c80661f7,

title = "COD removal characteristics in air-cathode microbial fuel cells",

abstract = "Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h-1, which was higher than acetate or filtered WW with an open circuit (0.10h-1), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.",

author = "Xiaoyuan Zhang and Weihua He and Lijiao Ren and Jennifer Stager and Evans, {Patrick J.} and Logan, {Bruce E.}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd.",

year = "2015",

month = jan,

day = "1",

doi = "10.1016/j.biortech.2014.11.001",

language = "English (US)",

volume = "176",

pages = "23--31",

journal = "Bioresource technology",

issn = "0960-8524",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - COD removal characteristics in air-cathode microbial fuel cells

AU - Zhang, Xiaoyuan

AU - He, Weihua

AU - Ren, Lijiao

AU - Stager, Jennifer

AU - Evans, Patrick J.

AU - Logan, Bruce E.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h-1, which was higher than acetate or filtered WW with an open circuit (0.10h-1), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.

AB - Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h-1, which was higher than acetate or filtered WW with an open circuit (0.10h-1), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.

UR - http://www.scopus.com/inward/record.url?scp=84911375779&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84911375779&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2014.11.001

DO - 10.1016/j.biortech.2014.11.001

M3 - Article

C2 - 25460980

AN - SCOPUS:84911375779

SN - 0960-8524

VL - 176

SP - 23

EP - 31

JO - Bioresource technology

JF - Bioresource technology

ER -

COD removal characteristics in air-cathode microbial fuel cells

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this