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Cyanobacteria and Clean Environment: 2022
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Cyanobacteria and Clean Environment: 2022

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Environmental Sustainability and Applications".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 7270

Special Issue Editors

Prof. Dr. Shiv Mohan Singh

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Guest Editor
Department of Botany, Centre of Advanced Studies in Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India
Interests: biodiversity in extreme habitats
Dr. Prashant Kumar Singh

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Guest Editor
Department of Biotechnology, Mizoram University, PUC Campus, Aizawl 796001, India
Interests: cyanobacterial stress physiology
Dr. Ajay Kumar

E-Mail Website1 Website2
Guest Editor
Agriculture Resaerch Organization, Volcani Centre, Rishon 7505101, Israel
Interests: microbial biotechnology; bacterial endophytes; plant microbe interactions
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cyanobacteria are the oldest living organisms on Earth and inhabit almost all environmental niches. They continue to contribute to the equilibrium of the Earth's atmosphere by generating oxygen and eliminating carbon dioxide. Despite this, heterocystous (specialized nitrogen-fixing cells formed during nitrogen starvation), cyanobacteria contribute to atmospheric nitrogen fixation. Therefore, cyanobacteria have tremendous potential in biotechnological applications for sustainable fuel, agriculture, industrial, and commercial applications.

Cyanobacteria have evolved specific regulatory mechanisms to cope with environmental stresses and/or variable environments. However, cyanobacterial adaptation mechanisms to environmental extremes are poorly researched, despite their booming presence in such ecological extremes. A basic understanding of cyanobacterial gene regulatory pathways could also be tailored for sustainable agriculture.

This Special Issue will discuss the different aspects of cyanobacterial adaptation to extreme environments and their potential for biotechnological exploitation and sustainable future research. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Cyanobacteria and algae for green energy and biofuel;
  • Cyanobacteria for sustainable agriculture;
  • Cyanobacteriadaptationsons extreme environment;
  • Cyanobacterial adaptations to extreme environment.

We look forward to receiving your contributions.

Prof. Dr. Shiv Mohan Singh
Dr. Prashant Kumar Singh
Dr. Ajay Kumar
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. Sustainability 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 2400 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

  • cyanobacteria
  • green algae
  • biofuel
  • agriculture
  • nitrogen fixation
  • stress adaptations
  • cyanobacterial blooms

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Published Papers (2 papers)

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14 pages, 5542 KiB  
Article
Biocrude Production Using a Novel Cyanobacterium: Pilot-Scale Cultivation and Lipid Extraction via Hydrothermal Liquefaction
by Samson Gichuki, Behnam Tabatabai and Viji Sitther
Sustainability 2023, 15(6), 4878; https://doi.org/10.3390/su15064878 - 9 Mar 2023
Cited by 2 | Viewed by 1831
Abstract
The use of renewable energy to reduce fossil fuel consumption is a key strategy to mitigate pollution and climate change, resulting in the growing demand for new sources. Fast-growing proprietary cyanobacterial strains of Fremyella diplosiphon with an average life cycle of 7–10 days, [...] Read more.
The use of renewable energy to reduce fossil fuel consumption is a key strategy to mitigate pollution and climate change, resulting in the growing demand for new sources. Fast-growing proprietary cyanobacterial strains of Fremyella diplosiphon with an average life cycle of 7–10 days, and a proven capacity to generate lipids for biofuel production are currently being studied. In this study, we investigated the growth and photosynthetic pigmentation of a cyanobacterial strain (SF33) in both greenhouse and outdoor bioreactors, and produced biocrude via hydrothermal liquefaction. The cultivation of F. diplosiphon did not significantly differ under suboptimal conditions (p < 0.05), including in outdoor bioreactors with growth differences of less than 0.04 (p = 0.035) among various batches. An analysis of the biocrude’s components revealed the presence of fatty acid biodiesel precursors such as palmitic acid and behenic acid, and alkanes such as hexadecane and heptadecane, used as biofuel additives. In addition, the quantification of value-added photosynthetic pigments revealed chlorophyll a and phycocyanin concentrations of 0.0011 ± 5.83 × 10−5 µg/µL and 7.051 ± 0.067 µg/µg chlorophyll a. Our results suggest the potential of F. diplosiphon as a robust species that can grow at varying temperatures ranging from 13 °C to 32 °C, while producing compounds for applications ranging from biofuel to nutritional supplements. The outcomes of this study pave the way for production-level scale-up and processing of F. diplosiphon-derived biofuels and marketable bioproducts. Fuel produced using this technology will be eco-friendly and cost-effective, and will make full use of the geographical location of regions with access to brackish waters. Full article
(This article belongs to the Special Issue Cyanobacteria and Clean Environment: 2022)
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Review

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13 pages, 494 KiB  
Review
Current Issues and Developments in Cyanobacteria-Derived Biofuel as a Potential Source of Energy for Sustainable Future
by Kshetrimayum Birla Singh, Kaushalendra, Savita Verma, Rowland Lalnunpuii and Jay Prakash Rajan
Sustainability 2023, 15(13), 10439; https://doi.org/10.3390/su151310439 - 2 Jul 2023
Cited by 3 | Viewed by 4426
Abstract
Biofuel production using cyanobacteria aims to maintain the sustainability of an ecosystem with minimum impact on the environment, unlike fossil fuels, which cause havoc on the environment. The application of biofuel as an alternative energy source will not only help in maintaining a [...] Read more.
Biofuel production using cyanobacteria aims to maintain the sustainability of an ecosystem with minimum impact on the environment, unlike fossil fuels, which cause havoc on the environment. The application of biofuel as an alternative energy source will not only help in maintaining a clean environment and improving air quality but also decrease harmful organic matter content from aquatic bodies. Cyanobacteria are valuable sources of many novel bioactive compounds, such as lipids and natural dyes, with potential commercial implications. One of the advantages of cyanobacteria is that their biochemical constituents can be modified by altering the source of nutrients and growth conditions. Careful changes in growth media and environmental conditions altering the quality and quantity of the biochemicals and yield capacity have been discussed and analyzed. In the present review, the challenges and successes achieved to date in the commercial production of biofuel and its application in the transportation industry are discussed. The authors also focus on different types of feedstocks obtained from biomass, especially from cyanobacterial species. This review also discusses the selection of appropriate cyanobacterial species with merits and demerits in the post-harvesting process. In sum, the current review provides insight into the use of organic bioresources to maintain a sustainable environment. Full article
(This article belongs to the Special Issue Cyanobacteria and Clean Environment: 2022)
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