Greenhouse gas emissions in sludge ultrasonication followed by anaerobic digestion processes

Pilli Sridhar; R. D. Tyagi; Puspendu Bhunia; Prangya Ranjan Rout; Tian C. Zhang; Rao Y. Surampalli

doi:10.1016/j.biortech.2021.125754

Greenhouse gas emissions in sludge ultrasonication followed by anaerobic digestion processes

Pilli Sridhar, R. D. Tyagi, Puspendu Bhunia, Prangya Ranjan Rout, Tian C. Zhang, Rao Y. Surampalli

Civil Engineering

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

12 Scopus citations

Abstract

This paper presents the greenhouse gas (GHG) emissions during ultrasonication of sludge and anaerobic digestion (AD) of the ultrasonicated sludge using mass-energy balance. Computation of the net energy (energy recovered - energy input) revealed that high solids concentration with low sonication specific energy provides positive net energy. Moreover, the GHG emissions can be minimised at low sonication specific energy input and high solids concentration compared to that of the control without sonication. Increase in temperature of sludge during sonication will reduce the energy input required for raising the sludge temperature to AD temperature and thus decreases the GHG emissions. With energy recovery from the methane produced in AD, the total GHG emissions can further be reduced, lower than that without energy recovery from methane.

Original language	English (US)
Article number	125754
Journal	Bioresource Technology
Volume	341
DOIs	https://doi.org/10.1016/j.biortech.2021.125754
State	Published - Dec 2021

Keywords

Anaerobic digestion
Greenhouse gas (GHG) emissions
Mass-energy balance
Methane recovery
Ultrasonication

ASJC Scopus subject areas

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

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10.1016/j.biortech.2021.125754

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title = "Greenhouse gas emissions in sludge ultrasonication followed by anaerobic digestion processes",

abstract = "This paper presents the greenhouse gas (GHG) emissions during ultrasonication of sludge and anaerobic digestion (AD) of the ultrasonicated sludge using mass-energy balance. Computation of the net energy (energy recovered - energy input) revealed that high solids concentration with low sonication specific energy provides positive net energy. Moreover, the GHG emissions can be minimised at low sonication specific energy input and high solids concentration compared to that of the control without sonication. Increase in temperature of sludge during sonication will reduce the energy input required for raising the sludge temperature to AD temperature and thus decreases the GHG emissions. With energy recovery from the methane produced in AD, the total GHG emissions can further be reduced, lower than that without energy recovery from methane.",

keywords = "Anaerobic digestion, Greenhouse gas (GHG) emissions, Mass-energy balance, Methane recovery, Ultrasonication",

author = "Pilli Sridhar and Tyagi, {R. D.} and Puspendu Bhunia and Rout, {Prangya Ranjan} and Zhang, {Tian C.} and Surampalli, {Rao Y.}",

note = "Funding Information: The authors are sincerely thankful to the Natural Sciences and Engineering Research Council of Canada (NSERC) (Grants A4984 , Canada Research Chair) for financial support. The views or opinions expressed in this article are those of the authors. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = dec,

doi = "10.1016/j.biortech.2021.125754",

language = "English (US)",

volume = "341",

journal = "Bioresource Technology",

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T1 - Greenhouse gas emissions in sludge ultrasonication followed by anaerobic digestion processes

AU - Sridhar, Pilli

AU - Tyagi, R. D.

AU - Bhunia, Puspendu

AU - Rout, Prangya Ranjan

AU - Zhang, Tian C.

AU - Surampalli, Rao Y.

N1 - Funding Information: The authors are sincerely thankful to the Natural Sciences and Engineering Research Council of Canada (NSERC) (Grants A4984 , Canada Research Chair) for financial support. The views or opinions expressed in this article are those of the authors. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/12

Y1 - 2021/12

N2 - This paper presents the greenhouse gas (GHG) emissions during ultrasonication of sludge and anaerobic digestion (AD) of the ultrasonicated sludge using mass-energy balance. Computation of the net energy (energy recovered - energy input) revealed that high solids concentration with low sonication specific energy provides positive net energy. Moreover, the GHG emissions can be minimised at low sonication specific energy input and high solids concentration compared to that of the control without sonication. Increase in temperature of sludge during sonication will reduce the energy input required for raising the sludge temperature to AD temperature and thus decreases the GHG emissions. With energy recovery from the methane produced in AD, the total GHG emissions can further be reduced, lower than that without energy recovery from methane.

AB - This paper presents the greenhouse gas (GHG) emissions during ultrasonication of sludge and anaerobic digestion (AD) of the ultrasonicated sludge using mass-energy balance. Computation of the net energy (energy recovered - energy input) revealed that high solids concentration with low sonication specific energy provides positive net energy. Moreover, the GHG emissions can be minimised at low sonication specific energy input and high solids concentration compared to that of the control without sonication. Increase in temperature of sludge during sonication will reduce the energy input required for raising the sludge temperature to AD temperature and thus decreases the GHG emissions. With energy recovery from the methane produced in AD, the total GHG emissions can further be reduced, lower than that without energy recovery from methane.

KW - Anaerobic digestion

KW - Greenhouse gas (GHG) emissions

KW - Mass-energy balance

KW - Methane recovery

KW - Ultrasonication

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JO - Bioresource Technology

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Greenhouse gas emissions in sludge ultrasonication followed by anaerobic digestion processes

Abstract

Keywords

ASJC Scopus subject areas

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