Scale-Up Challenges in Microbial Fermentation

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Industrial Fermentation".

Deadline for manuscript submissions: 15 March 2026 | Viewed by 1128

Special Issue Editor


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Guest Editor
Sustainable Biotechnology Research Group, School of Life Sciences, College of Liberal Art and Sciences, University of Westminster, London W1W 6UW, UK
Interests: microbial physiology and microbial communication; fermentation technology and bioreactor design; free and immobilised cell cultures; production and overproduction of antimicrobial agents; enzymes working with bacteria and fungi

Special Issue Information

Dear Colleagues,

Remarkable achievements and progress have been made in all scientific aspects of microbes, from their molecular genetics and metabolic processes to the biosynthesis of industrially important products. However, in most cases, there have been few advancements in the effective and economic translation of these scientific achievements into industrial-scale processes. There are numerous challenges in implementing laboratory experiments in the large-scale production of commercially desirable microbial products.

In this context, this Special Issue is focused on scale-up challenges in microbial fermentation. We invite original research manuscripts and in-depth review articles featuring scale-up and considering the following topics:

Batch, fed-batch, and continuous cultures;

Free- and immobilised-cell cultures;

Pure and mixed microbial cultures;

Scale-down approaches for economic scale-up;

Bioreactor designs (stirred-tank reactors, air-lift reactors, membrane reactors, membrane-linked reactors, and other designs) for successful scale-up;

Microbial fuel cells;

The morphological consideration of cultures;

Hydrodynamics of scale;

Shear stress and biofilm formation and other issues affecting scale-up.

We will consider manuscripts exploring all types of fermentation, including but not limited to those for the production of therapeutics, enzymes, food, vitamins, biofuels, biomass, and fine chemicals.

Prof. Dr. Tajalli Keshavarz
Guest Editor

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. Fermentation is an international peer-reviewed open access monthly 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 2100 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

  • microbes
  • free-cell culture
  • immobilised-cell culture
  • bioreactor designs
  • modes of fermentation
  • scale-up
  • scale-down

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Published Papers (1 paper)

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Research

16 pages, 1392 KiB  
Article
Bioprospecting for a Wild Strain of Sporisorium scitamineum for the Valorization of Sugarcane Molasses into Mannosylerythritol Lipids and Cellobiose Lipids
by André D. Valkenburg, Breyten van der Merwe, George M. Teke, Eugéne van Rensburg and Robert W. M. Pott
Fermentation 2025, 11(7), 384; https://doi.org/10.3390/fermentation11070384 - 3 Jul 2025
Viewed by 389
Abstract
Significant wastes such as bagasse, molasses, and vinasses are produced during sugarcane processing. Due to their high sugar content, these wastes are commonly used as low-cost substrates for biofuel production. However, these substrates are also suitable for the microbial synthesis of high-value biochemicals [...] Read more.
Significant wastes such as bagasse, molasses, and vinasses are produced during sugarcane processing. Due to their high sugar content, these wastes are commonly used as low-cost substrates for biofuel production. However, these substrates are also suitable for the microbial synthesis of high-value biochemicals like biosurfactants. Sporisorium scitamineum, a smut fungus capable of growing on sugarcane residues and producing mannosylerythritol lipids (MELs) and cellobiose lipids (CBLs), was identified as a promising candidate for valorizing sugarcane wastes. This study investigated MEL and CBL co-production from pure sugars and sugarcane molasses using an S. scitamineum strain isolated from sugarcane residues originating from KwaZulu-Natal, South Africa. Among the sugars tested, sucrose supported the highest glycolipid production, yielding 0.24 g/L MELs and 2.73 g/L CBLs. Lower titers were achieved with fructose, and no production occurred with glucose. Sugarcane molasses also proved to be an effective substrate, yielding 1.46 g/L CBLs—the highest reported titer from an industrial waste to date. However, all titers remained far below those of other glycolipids, which consistently exceed 50 g/L. Future efforts should focus on enhancing CBL production through process optimization or genetic engineering. Full article
(This article belongs to the Special Issue Scale-Up Challenges in Microbial Fermentation)
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