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Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating

Lignocellulosic biomass (LCB) is a common substrate for biogas and bioethanol production due to its significant properties and abundance. However, it has a unique recalcitrant structure that can inhibit the production of biogas, which necessitates pre-treatment of the substrate to obtain higher cel...

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Main Authors: Ab Aziz, Izzah Farhana, Che Man, Hasfalina, Hamzah, Muhammad Hazwan, Jamali, Nur Syakina, Omar, Rozita
Format: Article
Published: Universiti Putra Malaysia Press 2023
Online Access:http://psasir.upm.edu.my/id/eprint/110038/
http://www.pertanika.upm.edu.my/pjst/browse/regular-issue?article=JST-4076-2022
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spelling my.upm.eprints.1100382024-09-09T02:18:54Z http://psasir.upm.edu.my/id/eprint/110038/ Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating Ab Aziz, Izzah Farhana Che Man, Hasfalina Hamzah, Muhammad Hazwan Jamali, Nur Syakina Omar, Rozita Lignocellulosic biomass (LCB) is a common substrate for biogas and bioethanol production due to its significant properties and abundance. However, it has a unique recalcitrant structure that can inhibit the production of biogas, which necessitates pre-treatment of the substrate to obtain higher cellulose or sugars ready for microbial hydrolysis in producing biogas. In this study, a novel approach for empty fruit bunch (EFB) pre-treatment has been made: ohmic heating pre-treatment. This method is conventionally used in the food industry for pasteurization and extraction. It involves electric current and resistance inside the material that releases heat (Joule effect). A preliminary study has been done to figure out the potential of alkaline assisted with ohmic heating (AA-OH) pre-treatment for EFB. Lignin reduction for AA-OH EFB is higher than EFB that undergoes only size reduction (SR) pre-treatment, which are 15.54% and 11.51%, respectively. After confirming the potential of ohmic heating as one of the pre-treatment methods for EFB, three parameters were investigated (reaction time, temperature, and solvent concentration) by one factor at a time (OFAT) testing to obtain the optimum condition for AA-OH pre-treatment. The optimal condition for achieving a high reduction in lignin (86.9%) and hemicellulose (75%) while also showing a significant increase in cellulose (63.2%), which is desirable for the fermentation process, is achieved by using 4% w/v of NaOH, ohmic-heated at a temperature of 120°C for 25 minutes. To sum up, this developed ohmic heating pre-treatment technique can be applied to LCB prior to biogas or bioethanol production. Universiti Putra Malaysia Press 2023 Article PeerReviewed Ab Aziz, Izzah Farhana and Che Man, Hasfalina and Hamzah, Muhammad Hazwan and Jamali, Nur Syakina and Omar, Rozita (2023) Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating. Pertanika Journal of Science and Technology, 31 (6). pp. 3039-3057. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/pjst/browse/regular-issue?article=JST-4076-2022 10.47836/pjst.31.6.22
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Lignocellulosic biomass (LCB) is a common substrate for biogas and bioethanol production due to its significant properties and abundance. However, it has a unique recalcitrant structure that can inhibit the production of biogas, which necessitates pre-treatment of the substrate to obtain higher cellulose or sugars ready for microbial hydrolysis in producing biogas. In this study, a novel approach for empty fruit bunch (EFB) pre-treatment has been made: ohmic heating pre-treatment. This method is conventionally used in the food industry for pasteurization and extraction. It involves electric current and resistance inside the material that releases heat (Joule effect). A preliminary study has been done to figure out the potential of alkaline assisted with ohmic heating (AA-OH) pre-treatment for EFB. Lignin reduction for AA-OH EFB is higher than EFB that undergoes only size reduction (SR) pre-treatment, which are 15.54% and 11.51%, respectively. After confirming the potential of ohmic heating as one of the pre-treatment methods for EFB, three parameters were investigated (reaction time, temperature, and solvent concentration) by one factor at a time (OFAT) testing to obtain the optimum condition for AA-OH pre-treatment. The optimal condition for achieving a high reduction in lignin (86.9%) and hemicellulose (75%) while also showing a significant increase in cellulose (63.2%), which is desirable for the fermentation process, is achieved by using 4% w/v of NaOH, ohmic-heated at a temperature of 120°C for 25 minutes. To sum up, this developed ohmic heating pre-treatment technique can be applied to LCB prior to biogas or bioethanol production.
format Article
author Ab Aziz, Izzah Farhana
Che Man, Hasfalina
Hamzah, Muhammad Hazwan
Jamali, Nur Syakina
Omar, Rozita
spellingShingle Ab Aziz, Izzah Farhana
Che Man, Hasfalina
Hamzah, Muhammad Hazwan
Jamali, Nur Syakina
Omar, Rozita
Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
author_facet Ab Aziz, Izzah Farhana
Che Man, Hasfalina
Hamzah, Muhammad Hazwan
Jamali, Nur Syakina
Omar, Rozita
author_sort Ab Aziz, Izzah Farhana
title Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
title_short Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
title_full Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
title_fullStr Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
title_full_unstemmed Novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
title_sort novel pre-treatment for lignocellulosic biomass delignification using alkaline-assisted ohmic heating
publisher Universiti Putra Malaysia Press
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/110038/
http://www.pertanika.upm.edu.my/pjst/browse/regular-issue?article=JST-4076-2022
_version_ 1811686037537161216
score 13.211869

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