Effect of metal oxide based TiO2 nanoparticles on anaerobic digestion process of lignocellulosic substrate

Parisa Ghofrani-Isfahani; Hamed Baniamerian; Panagiotis Tsapekos; Merlin Alvarado-Morales; Takeshi Kasama; Mohammad Shahrokhi; Manouchehr Vossoughi; Irini Angelidaki

doi:10.1016/j.energy.2019.116580

Effect of metal oxide based TiO₂ nanoparticles on anaerobic digestion process of lignocellulosic substrate

Parisa Ghofrani-Isfahani, Hamed Baniamerian, Panagiotis Tsapekos, Merlin Alvarado-Morales, Takeshi Kasama, Mohammad Shahrokhi, Manouchehr Vossoughi, Irini Angelidaki^*

^*Corresponding author for this work

Sharif University of Technology

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Lignocellulosic materials are recalcitrant to bioconversion, due to their rigid physiochemical structure. In this work, the effects of Fe₂O₃–TiO₂ and NiO–TiO₂ nanoparticles (NPs) and FeCl₃ and NiCl₂ salts, on the anaerobic digestion (AD) of wheat straw have been investigated. For this purpose, metal oxide-TiO₂ NPs were synthesized and fully characterized. Results showed that addition of 0.252 mg of NiO–TiO₂/g total solids (TS) to batch assays resulted in increase of soluble chemical oxygen demand (COD) and 67% increase in volatile fatty acids (VFAs) concentration compared to control tests during the first 4 days of experiments. These results indicate that hydrolysis and acidogenesis rates have been enhanced due to addition of NPs. No significant effects have been observed in soluble COD and VFAs concentrations compared to control experiments by adding salts to the batch assays. Addition of NPs or salts led to an increase in methane production rate during the first 4 days of experiments.

Original language	English
Article number	116580
Journal	Energy
Volume	191
Number of pages	9
ISSN	0360-5442
DOIs	https://doi.org/10.1016/j.energy.2019.116580
Publication status	Published - 2020

Keywords

Nanoparticles
Anaerobic digestion
Lignocellulose
TiO2
Trace elements

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title = "Effect of metal oxide based TiO2 nanoparticles on anaerobic digestion process of lignocellulosic substrate",

abstract = "Lignocellulosic materials are recalcitrant to bioconversion, due to their rigid physiochemical structure. In this work, the effects of Fe2O3–TiO2 and NiO–TiO2 nanoparticles (NPs) and FeCl3 and NiCl2 salts, on the anaerobic digestion (AD) of wheat straw have been investigated. For this purpose, metal oxide-TiO2 NPs were synthesized and fully characterized. Results showed that addition of 0.252 mg of NiO–TiO2/g total solids (TS) to batch assays resulted in increase of soluble chemical oxygen demand (COD) and 67% increase in volatile fatty acids (VFAs) concentration compared to control tests during the first 4 days of experiments. These results indicate that hydrolysis and acidogenesis rates have been enhanced due to addition of NPs. No significant effects have been observed in soluble COD and VFAs concentrations compared to control experiments by adding salts to the batch assays. Addition of NPs or salts led to an increase in methane production rate during the first 4 days of experiments.",

keywords = "Nanoparticles, Anaerobic digestion, Lignocellulose, TiO2, Trace elements",

author = "Parisa Ghofrani-Isfahani and Hamed Baniamerian and Panagiotis Tsapekos and Merlin Alvarado-Morales and Takeshi Kasama and Mohammad Shahrokhi and Manouchehr Vossoughi and Irini Angelidaki",

year = "2020",

doi = "10.1016/j.energy.2019.116580",

language = "English",

volume = "191",

journal = "Energy",

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TY - JOUR

T1 - Effect of metal oxide based TiO2 nanoparticles on anaerobic digestion process of lignocellulosic substrate

AU - Ghofrani-Isfahani, Parisa

AU - Baniamerian, Hamed

AU - Tsapekos, Panagiotis

AU - Alvarado-Morales, Merlin

AU - Kasama, Takeshi

AU - Shahrokhi, Mohammad

AU - Vossoughi, Manouchehr

AU - Angelidaki, Irini

PY - 2020

Y1 - 2020

N2 - Lignocellulosic materials are recalcitrant to bioconversion, due to their rigid physiochemical structure. In this work, the effects of Fe2O3–TiO2 and NiO–TiO2 nanoparticles (NPs) and FeCl3 and NiCl2 salts, on the anaerobic digestion (AD) of wheat straw have been investigated. For this purpose, metal oxide-TiO2 NPs were synthesized and fully characterized. Results showed that addition of 0.252 mg of NiO–TiO2/g total solids (TS) to batch assays resulted in increase of soluble chemical oxygen demand (COD) and 67% increase in volatile fatty acids (VFAs) concentration compared to control tests during the first 4 days of experiments. These results indicate that hydrolysis and acidogenesis rates have been enhanced due to addition of NPs. No significant effects have been observed in soluble COD and VFAs concentrations compared to control experiments by adding salts to the batch assays. Addition of NPs or salts led to an increase in methane production rate during the first 4 days of experiments.

AB - Lignocellulosic materials are recalcitrant to bioconversion, due to their rigid physiochemical structure. In this work, the effects of Fe2O3–TiO2 and NiO–TiO2 nanoparticles (NPs) and FeCl3 and NiCl2 salts, on the anaerobic digestion (AD) of wheat straw have been investigated. For this purpose, metal oxide-TiO2 NPs were synthesized and fully characterized. Results showed that addition of 0.252 mg of NiO–TiO2/g total solids (TS) to batch assays resulted in increase of soluble chemical oxygen demand (COD) and 67% increase in volatile fatty acids (VFAs) concentration compared to control tests during the first 4 days of experiments. These results indicate that hydrolysis and acidogenesis rates have been enhanced due to addition of NPs. No significant effects have been observed in soluble COD and VFAs concentrations compared to control experiments by adding salts to the batch assays. Addition of NPs or salts led to an increase in methane production rate during the first 4 days of experiments.

KW - Nanoparticles

KW - Anaerobic digestion

KW - Lignocellulose

KW - TiO2

KW - Trace elements

U2 - 10.1016/j.energy.2019.116580

DO - 10.1016/j.energy.2019.116580

M3 - Journal article

SN - 0360-5442

VL - 191

JO - Energy

JF - Energy

M1 - 116580

ER -