Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester

Yun Chen; Keke Xiao; Xie Jiang; Nan Shen; Raymond J. Zeng; Yan Zhou

doi:10.1016/j.biortech.2017.09.153

Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester

Yun Chen, Keke Xiao, Xie Jiang, Nan Shen, Raymond J. Zeng, Yan Zhou^*

^*Corresponding author for this work

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

30 Scopus citations

Abstract

In this study, a thermophilic (65 °C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6 days with methane yield of 186.16 mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.

Original language	English
Pages (from-to)	724-729
Number of pages	6
Journal	Bioresource Technology
Volume	247
DOIs	https://doi.org/10.1016/j.biortech.2017.09.153
State	Published - 2018
Externally published	Yes

Keywords

Methane production
Single-stage digestion
Solid retention time
Thermophilic temperature (65 °C)

UN SDGs

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

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10.1016/j.biortech.2017.09.153

Cite this

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title = "Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester",

abstract = "In this study, a thermophilic (65 °C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6 days with methane yield of 186.16 mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.",

keywords = "Methane production, Single-stage digestion, Solid retention time, Thermophilic temperature (65 °C)",

author = "Yun Chen and Keke Xiao and Xie Jiang and Nan Shen and Zeng, {Raymond J.} and Yan Zhou",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2018",

doi = "10.1016/j.biortech.2017.09.153",

language = "英语",

volume = "247",

pages = "724--729",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester

AU - Chen, Yun

AU - Xiao, Keke

AU - Jiang, Xie

AU - Shen, Nan

AU - Zeng, Raymond J.

AU - Zhou, Yan

PY - 2018

Y1 - 2018

N2 - In this study, a thermophilic (65 °C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6 days with methane yield of 186.16 mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.

AB - In this study, a thermophilic (65 °C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6 days with methane yield of 186.16 mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.

KW - Methane production

KW - Single-stage digestion

KW - Solid retention time

KW - Thermophilic temperature (65 °C)

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U2 - 10.1016/j.biortech.2017.09.153

DO - 10.1016/j.biortech.2017.09.153

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AN - SCOPUS:85030700602

SN - 0960-8524

VL - 247

SP - 724

EP - 729

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester

Abstract

Keywords

UN SDGs

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