Effect of direct enzyme addition on the anaerobic digestion of OFMSW

Yagmur Kabakci; Sadiye Kosar; Ozgur Dogan; Fehmi Gorkem Uctug; Osman Atilla Arikan

doi:10.1016/j.scp.2023.101415

Effect of direct enzyme addition on the anaerobic digestion of OFMSW

Yagmur Kabakci^*, Sadiye Kosar, Ozgur Dogan, Fehmi Gorkem Uctug, Osman Atilla Arikan

^*Corresponding author for this work

Department of Environmental Engineering

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

Abstract

The organic fraction of municipal solid waste (OFMSW) has high biodegradability and is a good feedstock for anaerobic digestion (AD). However, the solubilization of OFMSW is a limiting factor for AD. In this study, enzyme treatment was investigated to increase the conversion of complex materials of OFMSW into soluble fractions. Six different concentrations (0.15, 0.3, 0.5, 1.0, 1.5 and 3.0 mg/VS_added) of the alpha amylase enzyme (obtained from Aspergillus oryzae) were directly added as a powder and automated biochemical methane potential (BMP) tests were performed under thermophilic conditions. According to BMP tests, the methane (CH₄) yield increased up to 17.5 % and the lag phase decreased to 19.3 % after enzyme addition. The highest CH₄ yield and shortest lag phase were obtained when 0.5 mg of enzyme/VS_added was added to the reactor. These findings suggest that direct alpha amylase enzyme application obtained from Aspergillus oryzae can be used to increase biogas production by enhancing solubilization of OFMSW for AD.

Original language	English
Article number	101415
Journal	Sustainable Chemistry and Pharmacy
Volume	37
DOIs	https://doi.org/10.1016/j.scp.2023.101415
Publication status	Published - Feb 2024

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Funding

The authors would like to express their appreciation for the research support given to the Circular Economy and Resource Efficiency Research Group by the Scientific and Technological Research Institution of Turkey (TUBITAK). The Istanbul Technical University , Turkey, Scientific Research Projects: Yagmur Kabakci [Project No: MDK-2019-42183 ], for their support, is gratefully acknowledged by the authors. The authors would like to thank the Duzce Solid Waste Association for their support of the project. The authors would like to express their appreciation for the research support given to the Circular Economy and Resource Efficiency Research Group by the Scientific and Technological Research Institution of Turkey (TUBITAK). The Istanbul Technical University, Turkey, Scientific Research Projects: Yagmur Kabakci [Project No: MDK-2019-42183], for their support, is gratefully acknowledged by the authors. The authors would like to thank the Duzce Solid Waste Association for their support of the project.

Funders	Funder number
Duzce Solid Waste Association
Scientific and Technological Research Institution of Turkey
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu
Istanbul Teknik Üniversitesi	MDK-2019-42183

Keywords

Alpha amylase
Anaerobic digestion
Biochemical methane potential (BMP)
Direct dose
Enzyme treatment
Organic fraction of municipal solid waste (OFMSW)

UN SDGs

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

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10.1016/j.scp.2023.101415

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title = "Effect of direct enzyme addition on the anaerobic digestion of OFMSW",

abstract = "The organic fraction of municipal solid waste (OFMSW) has high biodegradability and is a good feedstock for anaerobic digestion (AD). However, the solubilization of OFMSW is a limiting factor for AD. In this study, enzyme treatment was investigated to increase the conversion of complex materials of OFMSW into soluble fractions. Six different concentrations (0.15, 0.3, 0.5, 1.0, 1.5 and 3.0 mg/VSadded) of the alpha amylase enzyme (obtained from Aspergillus oryzae) were directly added as a powder and automated biochemical methane potential (BMP) tests were performed under thermophilic conditions. According to BMP tests, the methane (CH4) yield increased up to 17.5 % and the lag phase decreased to 19.3 % after enzyme addition. The highest CH4 yield and shortest lag phase were obtained when 0.5 mg of enzyme/VSadded was added to the reactor. These findings suggest that direct alpha amylase enzyme application obtained from Aspergillus oryzae can be used to increase biogas production by enhancing solubilization of OFMSW for AD.",

keywords = "Alpha amylase, Anaerobic digestion, Biochemical methane potential (BMP), Direct dose, Enzyme treatment, Organic fraction of municipal solid waste (OFMSW)",

author = "Yagmur Kabakci and Sadiye Kosar and Ozgur Dogan and Uctug, {Fehmi Gorkem} and Arikan, {Osman Atilla}",

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year = "2024",

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doi = "10.1016/j.scp.2023.101415",

language = "English",

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AU - Kabakci, Yagmur

AU - Kosar, Sadiye

AU - Dogan, Ozgur

AU - Uctug, Fehmi Gorkem

AU - Arikan, Osman Atilla

PY - 2024/2

Y1 - 2024/2

N2 - The organic fraction of municipal solid waste (OFMSW) has high biodegradability and is a good feedstock for anaerobic digestion (AD). However, the solubilization of OFMSW is a limiting factor for AD. In this study, enzyme treatment was investigated to increase the conversion of complex materials of OFMSW into soluble fractions. Six different concentrations (0.15, 0.3, 0.5, 1.0, 1.5 and 3.0 mg/VSadded) of the alpha amylase enzyme (obtained from Aspergillus oryzae) were directly added as a powder and automated biochemical methane potential (BMP) tests were performed under thermophilic conditions. According to BMP tests, the methane (CH4) yield increased up to 17.5 % and the lag phase decreased to 19.3 % after enzyme addition. The highest CH4 yield and shortest lag phase were obtained when 0.5 mg of enzyme/VSadded was added to the reactor. These findings suggest that direct alpha amylase enzyme application obtained from Aspergillus oryzae can be used to increase biogas production by enhancing solubilization of OFMSW for AD.

AB - The organic fraction of municipal solid waste (OFMSW) has high biodegradability and is a good feedstock for anaerobic digestion (AD). However, the solubilization of OFMSW is a limiting factor for AD. In this study, enzyme treatment was investigated to increase the conversion of complex materials of OFMSW into soluble fractions. Six different concentrations (0.15, 0.3, 0.5, 1.0, 1.5 and 3.0 mg/VSadded) of the alpha amylase enzyme (obtained from Aspergillus oryzae) were directly added as a powder and automated biochemical methane potential (BMP) tests were performed under thermophilic conditions. According to BMP tests, the methane (CH4) yield increased up to 17.5 % and the lag phase decreased to 19.3 % after enzyme addition. The highest CH4 yield and shortest lag phase were obtained when 0.5 mg of enzyme/VSadded was added to the reactor. These findings suggest that direct alpha amylase enzyme application obtained from Aspergillus oryzae can be used to increase biogas production by enhancing solubilization of OFMSW for AD.

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KW - Biochemical methane potential (BMP)

KW - Direct dose

KW - Enzyme treatment

KW - Organic fraction of municipal solid waste (OFMSW)

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ER -

Effect of direct enzyme addition on the anaerobic digestion of OFMSW

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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