Process assessment associated to microbial community response provides insight on possible mechanism of waste activated sludge digestion under typical chemical pretreatments

Aijuan Zhou*, Jiaguang Zhang, Cristiano Varrone, Kaili Wen, Guoying Wang, Wenzong Liu, Aijie Wang, Xiuping Yue

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Current studies have employed various chemicals for disintegrating and hydrolyzing microbial cells in waste activated sludge (WAS). However, a comprehensive process assessment over the whole anaerobic digestion process has seldom been proposed. Besides, the characterization of microbial community responses to these chemicals is not well understood. In this study, the effects of five typical chemicals: solubilizer (β-cyclodextrin, CD), alkaline (NaOH), peroxide (peracetic-acid, PA), biological (rhamnolipid, RL) and chemical (sodium dodecylsulphate, SDS) surfactants on WAS digestion were examined. Higher efficiencies of WAS solubilization, hydrolysis and acidification were achieved by CD treatment, followed by RL and SDS. Methanogenesis was also strongly chemicals-dependent. Shifts in microbial community structure were observed in all chemical-pretreated WAS. The community in RL, CD and PA was dominated by microorganisms that anaerobically hydrolyze organics to acids, while that in NaOH and SDS was mainly associated to biogas production. This study proved that the overall performance of WAS digestion was substantially depended on the initial chemical pretreatments, which in turn influenced and was related to the microbial community structures. Although the economic advantage might not be clear yet, the findings obtained in this work may provide a scientific basis for the potential implementation of chemicals for WAS treatment.

Original languageEnglish
JournalEnergy
Volume137
Pages (from-to)457-467
ISSN0360-5442
DOIs
Publication statusPublished - 2017

Keywords

  • Anaerobic digestion
  • Chemical pretreatments
  • Microbial community
  • Pyrosequencing
  • Waste activated sludge (WAS)

Cite this

Zhou, Aijuan ; Zhang, Jiaguang ; Varrone, Cristiano ; Wen, Kaili ; Wang, Guoying ; Liu, Wenzong ; Wang, Aijie ; Yue, Xiuping. / Process assessment associated to microbial community response provides insight on possible mechanism of waste activated sludge digestion under typical chemical pretreatments. In: Energy. 2017 ; Vol. 137. pp. 457-467.
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title = "Process assessment associated to microbial community response provides insight on possible mechanism of waste activated sludge digestion under typical chemical pretreatments",
abstract = "Current studies have employed various chemicals for disintegrating and hydrolyzing microbial cells in waste activated sludge (WAS). However, a comprehensive process assessment over the whole anaerobic digestion process has seldom been proposed. Besides, the characterization of microbial community responses to these chemicals is not well understood. In this study, the effects of five typical chemicals: solubilizer (β-cyclodextrin, CD), alkaline (NaOH), peroxide (peracetic-acid, PA), biological (rhamnolipid, RL) and chemical (sodium dodecylsulphate, SDS) surfactants on WAS digestion were examined. Higher efficiencies of WAS solubilization, hydrolysis and acidification were achieved by CD treatment, followed by RL and SDS. Methanogenesis was also strongly chemicals-dependent. Shifts in microbial community structure were observed in all chemical-pretreated WAS. The community in RL, CD and PA was dominated by microorganisms that anaerobically hydrolyze organics to acids, while that in NaOH and SDS was mainly associated to biogas production. This study proved that the overall performance of WAS digestion was substantially depended on the initial chemical pretreatments, which in turn influenced and was related to the microbial community structures. Although the economic advantage might not be clear yet, the findings obtained in this work may provide a scientific basis for the potential implementation of chemicals for WAS treatment.",
keywords = "Anaerobic digestion, Chemical pretreatments, Microbial community, Pyrosequencing, Waste activated sludge (WAS)",
author = "Aijuan Zhou and Jiaguang Zhang and Cristiano Varrone and Kaili Wen and Guoying Wang and Wenzong Liu and Aijie Wang and Xiuping Yue",
year = "2017",
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Process assessment associated to microbial community response provides insight on possible mechanism of waste activated sludge digestion under typical chemical pretreatments. / Zhou, Aijuan; Zhang, Jiaguang; Varrone, Cristiano; Wen, Kaili; Wang, Guoying; Liu, Wenzong; Wang, Aijie; Yue, Xiuping.

In: Energy, Vol. 137, 2017, p. 457-467.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Process assessment associated to microbial community response provides insight on possible mechanism of waste activated sludge digestion under typical chemical pretreatments

AU - Zhou, Aijuan

AU - Zhang, Jiaguang

AU - Varrone, Cristiano

AU - Wen, Kaili

AU - Wang, Guoying

AU - Liu, Wenzong

AU - Wang, Aijie

AU - Yue, Xiuping

PY - 2017

Y1 - 2017

N2 - Current studies have employed various chemicals for disintegrating and hydrolyzing microbial cells in waste activated sludge (WAS). However, a comprehensive process assessment over the whole anaerobic digestion process has seldom been proposed. Besides, the characterization of microbial community responses to these chemicals is not well understood. In this study, the effects of five typical chemicals: solubilizer (β-cyclodextrin, CD), alkaline (NaOH), peroxide (peracetic-acid, PA), biological (rhamnolipid, RL) and chemical (sodium dodecylsulphate, SDS) surfactants on WAS digestion were examined. Higher efficiencies of WAS solubilization, hydrolysis and acidification were achieved by CD treatment, followed by RL and SDS. Methanogenesis was also strongly chemicals-dependent. Shifts in microbial community structure were observed in all chemical-pretreated WAS. The community in RL, CD and PA was dominated by microorganisms that anaerobically hydrolyze organics to acids, while that in NaOH and SDS was mainly associated to biogas production. This study proved that the overall performance of WAS digestion was substantially depended on the initial chemical pretreatments, which in turn influenced and was related to the microbial community structures. Although the economic advantage might not be clear yet, the findings obtained in this work may provide a scientific basis for the potential implementation of chemicals for WAS treatment.

AB - Current studies have employed various chemicals for disintegrating and hydrolyzing microbial cells in waste activated sludge (WAS). However, a comprehensive process assessment over the whole anaerobic digestion process has seldom been proposed. Besides, the characterization of microbial community responses to these chemicals is not well understood. In this study, the effects of five typical chemicals: solubilizer (β-cyclodextrin, CD), alkaline (NaOH), peroxide (peracetic-acid, PA), biological (rhamnolipid, RL) and chemical (sodium dodecylsulphate, SDS) surfactants on WAS digestion were examined. Higher efficiencies of WAS solubilization, hydrolysis and acidification were achieved by CD treatment, followed by RL and SDS. Methanogenesis was also strongly chemicals-dependent. Shifts in microbial community structure were observed in all chemical-pretreated WAS. The community in RL, CD and PA was dominated by microorganisms that anaerobically hydrolyze organics to acids, while that in NaOH and SDS was mainly associated to biogas production. This study proved that the overall performance of WAS digestion was substantially depended on the initial chemical pretreatments, which in turn influenced and was related to the microbial community structures. Although the economic advantage might not be clear yet, the findings obtained in this work may provide a scientific basis for the potential implementation of chemicals for WAS treatment.

KW - Anaerobic digestion

KW - Chemical pretreatments

KW - Microbial community

KW - Pyrosequencing

KW - Waste activated sludge (WAS)

U2 - 10.1016/j.energy.2017.02.166

DO - 10.1016/j.energy.2017.02.166

M3 - Journal article

VL - 137

SP - 457

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JO - Energy

JF - Energy

SN - 0360-5442

ER -