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Energies
Special Issues
Advanced Biofuels: Microalgae, Drop-In and Bioelectro Approaches
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Advanced Biofuels: Microalgae, Drop-In and Bioelectro Approaches

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (30 June 2019) | Viewed by 3484

Special Issue Editors

Dr. You-Kwan Oh

E-Mail Website
Guest Editor
School of Chemical and Biomolecular Engineering, Pusan National University (PNU), Busan 46241, Korea
Interests: microalgae; fermentation; bioenergy; biorefinery; biohydrogen; bioelectrochemical conversion
Special Issues, Collections and Topics in MDPI journals
Dr. Jin-Suk Lee

E-Mail Website
Guest Editor
Gwangju Bioenergy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Korea
Interests: bioenergy; lignocellulosic ethanol; biodiesel; biorefinery; microalgae

Special Issue Information

Dear Colleagues,

Advanced biofuels, such as microalgae, drop-in, and electro biofuels, have been extensively investigated as alternatives to conventional plant-based biofuels (e.g., biodiesel, bioethanol). These biofuels are considered to be promising solutions for how to meet growing biofuel demand and have recently have highlighted in both industrial and academic fields as a way to substantially reduce CO2 emissions in the transportation sector. Microalgae show higher areal biomass productivities than traditional energy crops and can utilize directly high concentrations of CO2 from industrial flue gases. Oxygen-free and/or catalytically-upgraded biofuels are required to improve both fuel quality and blending rates. The application of bioelectrochemical conversions for the obtainment of value-added chemicals and biofuels via electrofermentation could contribute to the practical replacement of the fossil-fuel-based refinery process. This Special Issue covers recent advances in microalgae, drop-in, and electro biofuel technologies, including (bio)catalyst screening/development, pretreatment, (bio)reactor/process optimization, biofuel conversion, biorefinement, and scale-up.

Prof. You-Kwan Oh
Dr. Jin-Suk Lee
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

  • Advanced biofuels
  • Microalgae
  • Drop-in fuel
  • Electro-biofuel
  • Biomass pretreatment
  • Deoxygenation
  • C1 gases conversion
  • Biorefinery

Published Papers (1 paper)

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Research

14 pages, 2253 KiB  
Communication
Enhancing Stability of Microalgae Biocathode by a Partially Submerged Carbon Cloth Electrode for Bioenergy Production from Wastewater
by Jiayin Ling, Yanbin Xu, Chuansheng Lu, Weikang Lai, Guangyan Xie, Li Zheng, Manjunatha P. Talawar, Qingping Du and Gangyi Li
Energies 2019, 12(17), 3229; https://doi.org/10.3390/en12173229 - 22 Aug 2019
Cited by 30 | Viewed by 3112
Abstract
The electricity output from microbial fuel cell (MFC) with a microalgae assisted cathode is usually higher than that with an air cathode. The output of electricity from a photosynthetic microalgae MFC was positively correlated with the dissolved oxygen (DO) level in the microalgae [...] Read more.
The electricity output from microbial fuel cell (MFC) with a microalgae assisted cathode is usually higher than that with an air cathode. The output of electricity from a photosynthetic microalgae MFC was positively correlated with the dissolved oxygen (DO) level in the microalgae assisted biocathode. However, DO is highly affected by the photosynthesis of microalgae, leading to the low stability in the electricity output that easily varies with the change in microalgae growth. In this study, to improve the electricity output stability of the MFC, a partially submerged carbon cloth cathode electrode was first investigated to use oxygen from both microalgae and air, with synthetic piggery wastewater used as the anolyte and anaerobically digested swine wastewater as the catholyte. When the DO levels dropped from 13.6–14.8 to 1.0–1.6 mg/L, the working voltages in the MFCs with partially submerged electrodes remained high (256–239 mV), whereas that for the conventional completely submerged electrodes dropped from 259 to 102 mV. The working voltages (average, 297 ± 26 mV) of the MFCs with the 50% submerged electrodes were significantly (p < 0.05) higher than with other partially or completely submerged electrodes. The associated maximum lipid production from wastewater was 250 ± 42 mg/L with lipid content of 41 ± 6% dry biomass. Although the partially submerged electrode had no significant effects on lipid production or nitrogen removal in wastewater, there was significant improvement in the stability of the electricity generated under variable conditions. Full article
(This article belongs to the Special Issue Advanced Biofuels: Microalgae, Drop-In and Bioelectro Approaches)
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