The Role of Microbial Biotechnology in the Development of Sustainable Biopolymers

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1161

Special Issue Editors


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Guest Editor
Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, Leon, Spain
Interests: microbial biotechnology; biopolymers; extraction processes; PHAs; environmental biotechnology

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Guest Editor
Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo, 24358 Leon, Spain
Interests: microbial biotechnology; biopolymers; circular economy; PHAs; environmental biotechnology

Special Issue Information

Dear Colleagues,

The widespread use of traditional plastics has resulted in governments and citizens today being confronted with their harmful effects on the environment and on human and animal health. For this reason, and considering the global demands of society, the search for new polymers that can replace petroleum-based plastics is urgent. In this sense, microbial synthesized polymers are considered to be the main candidates to achieve this change, mainly due to the interesting properties they exhibit, e.g., biodegradability, biocompatibility, non-toxicity, and thermoplasticity, in addition to the improvement of these properties through the subsequent derivatives that can be obtained through post-synthesis chemical treatments. However, one of the current barriers to industrial-scale production is the high cost of the pure substrates. Within the framework of new environmental policies, the use of renewable raw materials and by-products is considered as the first option to achieve feasible industrial production. This approach also facilitates the integration of the production of new biopolymers into circular economy strategies. Microbial biotechnology allows progress to be made on new developments to replace traditional plastics. New biotechnological techniques have made it possible to study the mechanisms of biopolymer synthesis in microorganisms in depth. In addition, they have made it possible to introduce new functionalities into the microorganism in order to valorize residues of different natures, to increase the production yield or even to improve the mechanical properties of the biopolymers. We are confident that the new advances related to the topic of this Special Issue will be of great interest to many professionals and academics. It is a pleasure to invite you to submit original articles or reviews on the importance of microbial biotechnology and new genomic advances in the development of new biopolymers.

Dr. Alejandro Chamizo-Ampudia
Dr. Silvia González-Rojo
Guest Editors

Manuscript Submission Information

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Keywords

  • microbial biotechnology
  • biopolymers
  • circular economy
  • waste valorization
  • bioplastics
  • sustainable polymers
  • microorganisms
  • microalgae

Published Papers (1 paper)

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Research

18 pages, 2320 KiB  
Article
Alkaline-Tolerant Bacillus cereus 12GS: A Promising Polyhydroxybutyrate (PHB) Producer Isolated from the North of Mexico
by Gustavo de J. San Miguel-González, María E. Alemán-Huerta, Raul E. Martínez-Herrera, Isela Quintero-Zapata, Susana de la Torre-Zavala, Hamlet Avilés-Arnaut, Fátima L. Gandarilla-Pacheco and Erick de J. de Luna-Santillana
Microorganisms 2024, 12(5), 863; https://doi.org/10.3390/microorganisms12050863 - 26 Apr 2024
Viewed by 803
Abstract
Environmental pollution caused by petroleum-derived plastics continues to increase annually. Consequently, current research is interested in the search for eco-friendly bacterial polymers. The importance of Bacillus bacteria as producers of polyhydroxyalkanoates (PHAs) has been recognized because of their physiological and genetic qualities. In [...] Read more.
Environmental pollution caused by petroleum-derived plastics continues to increase annually. Consequently, current research is interested in the search for eco-friendly bacterial polymers. The importance of Bacillus bacteria as producers of polyhydroxyalkanoates (PHAs) has been recognized because of their physiological and genetic qualities. In this study, twenty strains of Bacillus genus PHA producers were isolated. Production was initially evaluated qualitatively to screen the strains, and subsequently, the strain B12 or Bacillus sp. 12GS, with the highest production, was selected through liquid fermentation. Biochemical and molecular identification revealed it as a novel isolate of Bacillus cereus. Production optimization was carried out using the Taguchi methodology, determining the optimal parameters as 30 °C, pH 8, 150 rpm, and 4% inoculum, resulting in 87% and 1.91 g/L of polyhydroxybutyrate (PHB). Kinetic studies demonstrated a higher production within 48 h. The produced biopolymer was analyzed using Fourier-transform infrared spectroscopy (FTIR), confirming the production of short-chain-length (scl) polyhydroxyalkanoate, named PHB, and differential scanning calorimetry (DSC) analysis revealed thermal properties, making it a promising material for various applications. The novel B. cereus isolate exhibited a high %PHB, emphasizing the importance of bioprospecting, study, and characterization for strains with biotechnological potential. Full article
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