Microbial electrolysis contribution to anaerobic digestion of waste activated sludge, leading to accelerated methane production

Wenzong Liu, Weiwei Cai, Zechong Guo, Chunxue Yang, Cristiano Varrone, Aijie Wang

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Methane production rate (MPR) in waste activated sludge (WAS) digestion processes is typically limitedby the initial steps of complex organic matter degradation, leading to a limited MPR due to sludgefermentation speed of solid particles. In this study, a novel microbial electrolysis AD reactor (ME-AD) wasused to accelerate methane production for energy recovery from WAS. Carbon bioconversion wasaccelerated by ME producing H2 at the cathode. MPR was enhanced to 91.8 gCH4/m3 reactor/d in themicrobial electrolysis ME-AD reactor, thus improving the rate by 3 times compared to control conditions (30.6 gCH4/m3 reactor/d in AD). The methane production yield reached 116.2 mg/g VSS in the ME-ADreactor. According to balance calculation on electron transfer and methane yield, the increasedmethane production was mostly dependent on electron contribution through the ME system. Thus, theuse of the novel ME-AD reactor allowed to significantly enhance carbon degradation and methaneproduction from WAS.
Original languageEnglish
JournalRenewable Energy
Volume91
Pages (from-to)334-339
ISSN0960-1481
DOIs
Publication statusPublished - 2016

Keywords

  • Microbial electrolysis AD reactor
  • Waste activated sludge
  • Energy recovery
  • Bio-electron
  • Methanogenesis

Cite this

Liu, Wenzong ; Cai, Weiwei ; Guo, Zechong ; Yang, Chunxue ; Varrone, Cristiano ; Wang, Aijie. / Microbial electrolysis contribution to anaerobic digestion of waste activated sludge, leading to accelerated methane production. In: Renewable Energy. 2016 ; Vol. 91. pp. 334-339.
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title = "Microbial electrolysis contribution to anaerobic digestion of waste activated sludge, leading to accelerated methane production",
abstract = "Methane production rate (MPR) in waste activated sludge (WAS) digestion processes is typically limitedby the initial steps of complex organic matter degradation, leading to a limited MPR due to sludgefermentation speed of solid particles. In this study, a novel microbial electrolysis AD reactor (ME-AD) wasused to accelerate methane production for energy recovery from WAS. Carbon bioconversion wasaccelerated by ME producing H2 at the cathode. MPR was enhanced to 91.8 gCH4/m3 reactor/d in themicrobial electrolysis ME-AD reactor, thus improving the rate by 3 times compared to control conditions (30.6 gCH4/m3 reactor/d in AD). The methane production yield reached 116.2 mg/g VSS in the ME-ADreactor. According to balance calculation on electron transfer and methane yield, the increasedmethane production was mostly dependent on electron contribution through the ME system. Thus, theuse of the novel ME-AD reactor allowed to significantly enhance carbon degradation and methaneproduction from WAS.",
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author = "Wenzong Liu and Weiwei Cai and Zechong Guo and Chunxue Yang and Cristiano Varrone and Aijie Wang",
year = "2016",
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language = "English",
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Microbial electrolysis contribution to anaerobic digestion of waste activated sludge, leading to accelerated methane production. / Liu, Wenzong; Cai, Weiwei; Guo, Zechong; Yang, Chunxue; Varrone, Cristiano; Wang, Aijie.

In: Renewable Energy, Vol. 91, 2016, p. 334-339.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Microbial electrolysis contribution to anaerobic digestion of waste activated sludge, leading to accelerated methane production

AU - Liu, Wenzong

AU - Cai, Weiwei

AU - Guo, Zechong

AU - Yang, Chunxue

AU - Varrone, Cristiano

AU - Wang, Aijie

PY - 2016

Y1 - 2016

N2 - Methane production rate (MPR) in waste activated sludge (WAS) digestion processes is typically limitedby the initial steps of complex organic matter degradation, leading to a limited MPR due to sludgefermentation speed of solid particles. In this study, a novel microbial electrolysis AD reactor (ME-AD) wasused to accelerate methane production for energy recovery from WAS. Carbon bioconversion wasaccelerated by ME producing H2 at the cathode. MPR was enhanced to 91.8 gCH4/m3 reactor/d in themicrobial electrolysis ME-AD reactor, thus improving the rate by 3 times compared to control conditions (30.6 gCH4/m3 reactor/d in AD). The methane production yield reached 116.2 mg/g VSS in the ME-ADreactor. According to balance calculation on electron transfer and methane yield, the increasedmethane production was mostly dependent on electron contribution through the ME system. Thus, theuse of the novel ME-AD reactor allowed to significantly enhance carbon degradation and methaneproduction from WAS.

AB - Methane production rate (MPR) in waste activated sludge (WAS) digestion processes is typically limitedby the initial steps of complex organic matter degradation, leading to a limited MPR due to sludgefermentation speed of solid particles. In this study, a novel microbial electrolysis AD reactor (ME-AD) wasused to accelerate methane production for energy recovery from WAS. Carbon bioconversion wasaccelerated by ME producing H2 at the cathode. MPR was enhanced to 91.8 gCH4/m3 reactor/d in themicrobial electrolysis ME-AD reactor, thus improving the rate by 3 times compared to control conditions (30.6 gCH4/m3 reactor/d in AD). The methane production yield reached 116.2 mg/g VSS in the ME-ADreactor. According to balance calculation on electron transfer and methane yield, the increasedmethane production was mostly dependent on electron contribution through the ME system. Thus, theuse of the novel ME-AD reactor allowed to significantly enhance carbon degradation and methaneproduction from WAS.

KW - Microbial electrolysis AD reactor

KW - Waste activated sludge

KW - Energy recovery

KW - Bio-electron

KW - Methanogenesis

U2 - 10.1016/j.renene.2016.01.082

DO - 10.1016/j.renene.2016.01.082

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SP - 334

EP - 339

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -