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Biotechnology Innovations for Sustainable Energy
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Biotechnology Innovations for Sustainable Energy

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I1: Fuel".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 7018

Special Issue Editors

Prof. Dr. Mohamad Faizal Ibrahim

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Guest Editor
Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
Interests: waste utilization for value-added products through biotechnological approaches
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Suraini Abd-Aziz

E-Mail Website
Guest Editor
Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Interests: industrial and environmental biotechnology; specialising in bioenergy and biobased chemicals; focused on the utilisation of agro-wastes for bioenergy and value-added products towards zero waste emission
Dr. Juferi Idris

E-Mail Website
Guest Editor
Faculty of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, 94300 Kota Samarahan, Sarawak, Malaysia
Interests: environment (wastewater, activated carbon, carbonization)

Special Issue Information

Dear Colleagues,

We are pleased to invite submissions to a Special Issue of Energies on the topic of “Biotechnology Innovations for Sustainable Energy”. Bioenergy has important roles in the sustainability of the world’s development. The utilization of bioenergy in our daily operation as an alternative to current fossil fuels is capable of reducing the amount of greenhouse gas emissions in the atmosphere. Bioenergy can be in the form of a liquid, gas, or solid that can be produced through various biotechnological processes and innovations. The enhancement of bioenergy production can carried out through the molecular modification of strains, searching for a suitable substrate or raw material, cost-effective pretreatment processes, suitable bioprocessing strategies, or the recovery and application of bioenergy.

Therefore, the aim of this Special Issue is to highlight the advances in the production of bioenergy through various biotechnological approaches. The scope covers, but is not limited to, all progress in bioenergy production; applications; feedstocks or raw materials; properties and characteristics; waste management; bioprocessing; socioeconomic and technoeconomic analyses; policies and strategies; and supply chains. The roles of bioenergy in sustaining global development can also be included.

This Special Issue is one of the issues handled for the Asian Federation of Biotechnology Malaysia Chapter International Symposium 2022 (AFOBMCIS 2022) to be held in Langkawi on 18–21 September 2022. More information on this symposium can be found at www.afobmcis.my.

Dr. Mohamad Faizal Ibrahim
Prof. Dr. Suraini Abd-Aziz
Dr. Juferi Idris
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biochar
  • carbonisation
  • climate change
  • biomass
  • biochar application

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Published Papers (3 papers)

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Research

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15 pages, 4394 KiB  
Article
Enhancing Glucose Recovery from Hibiscus cannabinus L. through Phosphoric Acid Pretreatment
by Duangporn Premjet, Suwanan Wongleang and Siripong Premjet
Energies 2022, 15(20), 7573; https://doi.org/10.3390/en15207573 - 14 Oct 2022
Cited by 4 | Viewed by 1345
Abstract
Non-food lignocellulosic biomass is an attractive source owing to its abundance as a renewable resource and cost-effectiveness. Hibiscus cannabinus L., commonly known as kenaf, is a fiber-producing plant with high cellulose yield and non-food biomass. This study aimed to enhance the glucose recovery [...] Read more.
Non-food lignocellulosic biomass is an attractive source owing to its abundance as a renewable resource and cost-effectiveness. Hibiscus cannabinus L., commonly known as kenaf, is a fiber-producing plant with high cellulose yield and non-food biomass. This study aimed to enhance the glucose recovery (GR) of kenaf biomass (KB). The bark and core fibers of KB are rich in glucan content and low in lignin content. Based on its glucan and lignin contents, KB has considerable potential as a feedstock for synthesizing monomer sugars, which can produce biofuel and high-value compounds. Therefore, the bark and core fibers were treated at a moderate temperature with various concentrations of phosphoric acid, followed by enzymatic hydrolysis. After pretreatment, the chemical composition of both feedstocks was changed. Phosphoric acid substantially affected the elimination of partial lignin and hemicellulose, which led to enhanced enzymatic hydrolysis. The maximum hydrolysis efficiency (HE) and GR of bark and core fibers were achieved when both feedstocks were treated with 75% phosphoric acid. Compared with untreated feedstocks, HE increased by approximately 5.6 times for bark and 4.7 times for core fibers. However, GR was enhanced approximately 4.9-fold for bark and 4.3-fold for core fibers. Full article
(This article belongs to the Special Issue Biotechnology Innovations for Sustainable Energy)
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16 pages, 25872 KiB  
Article
A Novel Mesoporous Activated Carbon Derived from Calliandra calothyrsus via Physical Activation: Saturation and Superheated
by Nur Adi Saputra, Saptadi Darmawan, Lisna Efiyanti, Djeni Hendra, Santiyo Wibowo, Adi Santoso, Djarwanto, Gusmailina, Sri Komarayati, Dian Anggraini Indrawan, Yuniawati, Deded Sarip Nawawi, Akhiruddin Maddu, Gustan Pari and Wasrin Syafii
Energies 2022, 15(18), 6675; https://doi.org/10.3390/en15186675 - 13 Sep 2022
Cited by 3 | Viewed by 1803
Abstract
In this work, both pyrochar and activated carbon were prepared by physical activation (i.e., saturation and superheated) by involving a thermal agent as a comparison. The effects of three agents on the pore development of activated carbon from a new material, Calliandra calothyrsus, [...] Read more.
In this work, both pyrochar and activated carbon were prepared by physical activation (i.e., saturation and superheated) by involving a thermal agent as a comparison. The effects of three agents on the pore development of activated carbon from a new material, Calliandra calothyrsus, were observed in detail. The BET surface area and the iodine index of the prepared activated carbon were used as pyrochar selection. Proximate, ultimate, XRD, FTIR, TGA, and SEM were used to characterize the physical and chemical properties of the product. Pyrochar pores were found to develop significantly at 350 °C, indicated by an increase in the BET surface area and iodine index. Pyrochar from a temperature of 350 °C was then selected as a precursor of activated carbon. S–SS and SS–S activated carbon samples were declared to have the highest iodine index (870 mg/g) and the highest BET surface area (642 m2/g), respectively. The pore distribution data showed that the superheated agent widened the pore and provided an active site for iodine adsorption, while the saturation agent resulted in a narrower pore for an increase in the BET surface area. S–SS has a lower C fraction and higher O fraction than SS–S. The SS–S samples have both Vol and Volmic for an increased BET surface area. The number of aromatic layers and –OH functional groups of the S–SS sample is more convenient for iodine enhancement than for increasing the BET surface area. Less water droplets and greater energy from superheated resulting pores widen, increasing the aromatic layer and providing additional functional groups. Full article
(This article belongs to the Special Issue Biotechnology Innovations for Sustainable Energy)
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Review

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32 pages, 2260 KiB  
Review
Biochar Acts as an Emerging Soil Amendment and Its Potential Ecological Risks: A Review
by Yue Zhao, Xin Li, Yunyang Li, Huanyu Bao, Jia Xing, Yongzhao Zhu, Jun Nan and Guoren Xu
Energies 2023, 16(1), 410; https://doi.org/10.3390/en16010410 - 29 Dec 2022
Cited by 17 | Viewed by 3117
Abstract
Biochar, known as “Black Gold”, has become a novel approach with potential benefits for soil amendment, such as improving soil physicochemical properties, reducing greenhouse gas emissions, and enhancing soil fertility. The previous research studies mainly focus on exploring different methods for the improvement [...] Read more.
Biochar, known as “Black Gold”, has become a novel approach with potential benefits for soil amendment, such as improving soil physicochemical properties, reducing greenhouse gas emissions, and enhancing soil fertility. The previous research studies mainly focus on exploring different methods for the improvement of biochar enriched nutrients as fertilizers; however, the migration and transformation mechanisms of these nutrients induced by biochar are yet to be extensively investigated. This paper provides an overview of recent advances in the application and mechanisms of biochar for soil amendment focusing on soil properties and nutrients improvement. Biochar positively alters microbial-mediated reactions in the soil C and N cycles, i.e., mineralization of C and N, and N2 fixation, thus enhancing maximizing C and N use efficiency and reducing the potential losses. Moreover, biochar provides reactive surfaces where P and K ions are retained in soil microbial biomass and in exchange sites, leading to increasing the availability of P and K to plants uptake. In addition, the toxic substances and potential ecological risks of biochar were also reviewed and discussed, thereby providing a baseline reference and guiding significance for future biochar applications as promising soil amendments. Full article
(This article belongs to the Special Issue Biotechnology Innovations for Sustainable Energy)
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