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Bioengineering
Special Issues
Microalgae as a Source of Alternative Proteins and Other Biomolecules
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Microalgae as a Source of Alternative Proteins and Other Biomolecules

A special issue of Bioengineering (ISSN 2306-5354). This special issue belongs to the section "Biochemical Engineering".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 5549

Special Issue Editors

Dr. Giorgos Markou

E-Mail Website
Guest Editor
Lab of Food Biotechnology and Recycling of Agricultural By-Products, Institute of Technology of Agricultural Products, Hellenic Agricultural Organization-DEMETER, Sof. Venizelou 1, Lykovrissi, 14123 Attica, Greece
Interests: cultivation of algae; biomass production; biotechnology for food, feed and biofuels; valorization of waste-streams; recovery and reuse of nutrients
Special Issues, Collections and Topics in MDPI journals
Dr. Imene Chentir

E-Mail Website
Guest Editor
Higher School of Food Science and Agri-Food Industry. Lab of Food, Processing, Control and Agroressources Valorization. Ahmed Hamidouche Av, Oued Smar, Algiers 16200, Algeria
Interests: Microalgae, stress conditions, secondary metabolites induction, phycobilins, biopolymer, modelization

Special Issue Information

Dear Colleagues,

The rapid human population growth along with high demand for biological molecules as well as changes in the food & feed market, have aroused the interest of the scientific community in the exploration of new sources of proteins and bioactive molecules from both production and processing. Microalgae, including cyanobacteria, have been emerged and explored as a competitive and futuristic source for the production of various biomolecules, including proteins, lipids, polyunsaturated fatty acids, polysaccharides, phycobiliproteins, pigments, enzymes etc. with potential applications in food, pharmaceutical and industrial sectors. They are versatile microorganisms that can be grown either in photoautotrophic, either in mixotrophic or heterotrophic mode. However, optimal productivity, recovery and quality of microalgal bioactive molecules of interest are perennial concerns for their industrial and commercial applications. To overcome such limitations improvements could be achieved through biotechnological and bioengineering methods for improved productivities and yields, while also novel technologies could be applied to improve the extraction, recovery and quality of bioproducts.

This Special Issue will focus on original research articles and comprehensive reviews dealing with recent advances in algal biotechnology.

Topics of interest for this Special Issues include the following:

  1. Innovative bioprocesses and strategies for optimized microalgae cultivation for protein and biomolecules production
  2. Microalgal bioprocess engineering for protein and biomolecules production enhancement
  3. Advanced methods for microalgae proteins and peptides characterization
  4. Downstream extraction technologies for protein and bioactive molecules recovery
  5. Application of proteins and bioactive molecules in food, pharmaceutical and industrial sector

Dr. Giorgos Markou
Dr. Imene Chentir
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. Bioengineering 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 2700 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.

Published Papers (2 papers)

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Research

13 pages, 2220 KiB  
Article
Production of Arthrospira platensis: Effects on Growth and Biochemical Composition of Long-Term Acclimatization at Different Salinities
by Giorgos Markou, Eleni Kougia, Dimitris Arapoglou, Imene Chentir, Varvara Andreou and Ioannis Tzovenis
Bioengineering 2023, 10(2), 233; https://doi.org/10.3390/bioengineering10020233 - 09 Feb 2023
Cited by 3 | Viewed by 2986
Abstract
Arthrospira platensis is an edible cyanobacterium with high nutritional value. Even though A. platensis is not a marine species, it can be adapted to higher salinities, a strategy that could allow mass cultivation using brackish or saline water. In this work A. platensis [...] Read more.
Arthrospira platensis is an edible cyanobacterium with high nutritional value. Even though A. platensis is not a marine species, it can be adapted to higher salinities, a strategy that could allow mass cultivation using brackish or saline water. In this work A. platensis was long-term adapted at different salinities (5–60 g/L NaCl added as natural sea salt) to evaluate the growth and biochemical composition of the biomass produced. Biomass production was enhanced in salinity up to 40 g/L NaCl, while at 60 g/L NaCl biomass production slightly decreased. However, it displayed higher values compared to the conventional Zarrouk growth medium. By increasing the salinity, carbohydrate content increases, while proteins, phycocyanin, carotenoids, and total phenolics decreased. Biomass content in lipids, and chlorophyll along with the antioxidant capacity of extracts, was not significantly affected. A. platensis tended to increase the unsaturated fatty acids, while amino acid composition was not significantly affected by the increased salinity. However, in vitro protein digestibility was negatively affected when salinity was above 20 g/L NaCl. It was macroscopically observed that trichomes were longer at higher salinities, and especially at 40 g/L NaCl. The results suggest that A. platensis when acclimated in long-term can be grown successfully at various salinities. Full article
(This article belongs to the Special Issue Microalgae as a Source of Alternative Proteins and Other Biomolecules)
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11 pages, 3932 KiB  
Article
Dynamic Foam Characteristics during Cultivation of Arthrospira platensis
by Ameer Ali Kubar, Amjad Ali, Santosh Kumar, Shuhao Huo, Muhammad Wajid Ullah, Khulood Fahad Saud Alabbosh, Muhammad Ikram and Jun Cheng
Bioengineering 2022, 9(6), 257; https://doi.org/10.3390/bioengineering9060257 - 16 Jun 2022
Cited by 1 | Viewed by 1926
Abstract
This study is aimed at understanding the serious foaming problems during microalgal cultivation in industrial raceway ponds by studying the dynamic foam properties in Arthrospira platensis cultivation. A. platensis was cultivated in a 4 L bowl bioreactor for 4 days, during which the [...] Read more.
This study is aimed at understanding the serious foaming problems during microalgal cultivation in industrial raceway ponds by studying the dynamic foam properties in Arthrospira platensis cultivation. A. platensis was cultivated in a 4 L bowl bioreactor for 4 days, during which the foam height above the algal solution increased from 0 to 30 mm with a bubble diameter of 1.8 mm, and biomass yield reached 1.5 g/L. The algal solution surface tension decreased from 55 to 45 mN/m, which favored the adsorption of microalgae on the bubble to generate more stable foams. This resulted in increased foam stability (FS) from 1 to 10 s, foam capacity (FC) from 0.3 to 1.2, foam expansion (FE) from 15 to 43, and foam maximum density (FMD) from 0.02 to 0.07. These results show a decrease in CO2 flow rate and operation temperature when using the Foamscan instrument, which minimized the foaming phenomenon in algal solutions to a significantly lower and acceptable level. Full article
(This article belongs to the Special Issue Microalgae as a Source of Alternative Proteins and Other Biomolecules)
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