A comparative analysis of biopolymer production by microbial and bioelectrochemical technologies

Chavez, Brenda Alvarez; Raghavan, Vijaya; Tartakovsky, B.

doi:10.1039/d1ra08796g

Cited by 22 publications

(5 citation statements)

References 75 publications

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“…Indeed, the average price for polyhydroxyalkanoates (PHAs) is 7.46 euros per Kg. 74 For the other components, carbon nanofibers have the highest influence on the final cost. The final price for a 1 cm 2 electrode is approximately 0.05 euros.…”

Section: Resultsmentioning

confidence: 99%

Bacterial-Polyhydroxybutyrate for Biocompatible Microbial Electrodes

de Moura Torquato,

Lacalamita,

Matteucci

et al. 2024

J. Electrochem. Soc.

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The development of bioelectrochemical systems requires careful selection of both their biotic and abiotic components to obtain sustainable devices. Herein, we report a biophotoelectrode obtained with polyhydroxybutyrate (PHB), a biopolymer, which purple non-sulphur bacteria produce as an energy stock under specific environmental conditions. The electrode was obtained by casting a mixture composed of PHB and carbon fibers in a 3:2 mass ratio. Following, the composite material was modified with polydopamine and thermally treated to obtain a hydrophilic electrode with improved electrochemical behavior. The bio-based electrode was tested with metabolically active cells of Rhodobacter capsulatus embedded in a biohybrid matrix of polydopamine. The system achieved enhanced catalytic activity under illumination, with an 18-fold increase in photocurrent production compared to biophotoelectrodes based on glassy carbon, reaching a current density of 12 ± 3 µA cm-2, after 30 min of light exposure at +0.32 V. The presented biocompatible electrode provides a sustainable alternative to metal-based and critical raw material-based electrodes for bioelectrochemical systems.

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Section: Resultsmentioning

confidence: 99%

Bacterial-Polyhydroxybutyrate for Biocompatible Microbial Electrodes

de Moura Torquato,

Lacalamita,

Matteucci

et al. 2024

J. Electrochem. Soc.

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“…Microbial PHB production depends on external triggers, such as nitrogen or phosphate starvation as well as an oversupply of carbon sources (Steinbüchel and Lütke-Eversloh, 2003). Industrial bio-based production solely relies on heterotrophic microorganisms, which require a carbon feedstock, mostly polysaccharides (Chavez et al, 2022). This production bears some disadvantages: firstly, the loss of these feedstocks as food-source and secondly, the high costs of the feedstocks.…”

Section: Cyanobacterial Bioplastic Productionmentioning

confidence: 99%

Reviews in astronomy and space sciences

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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“…Moreover, the yields of PHAs from BSG typically do not match those from refined substates like glucose and sucrose; for example, PHA yield from glucose and sucrose in single−culture conditions are reported as 300 g/kg and 170 g/kg, respectively [54], compared to 12.5 g/kg dry added residue [18], 13.1 g/kg via SSF [9], and 90 g/kg pretreated BSG [10]. This lower yield could lead to higher operational costs per unit of PHA produced, as more substrate is required to achieve the same output.…”

Section: Economic Analysis and Optimization Of Bsg Utilizationmentioning

confidence: 99%

Harnessing Brewery Spent Grain for Polyhydroxyalkanoate Production

Terfa,

Patel,

Kim

et al. 2024

Macromol

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The utility of brewery spent grain (BSG), a byproduct of the beer production process, for the synthesis of polyhydroxyalkanoates (PHAs), is a significant advancement towards sustainable and cost-effective biopolymer production. This paper reviews the upcycling potential of BSG as a substrate for PHA production, utilizing various biotechnological approaches to convert this abundant waste material into high-value biodegradable polymers. Through a comprehensive review of recent studies, we highlight the biochemical composition of BSG and its suitability for microbial fermentation processes. This research delves into different methodologies for PHA production from BSG, including the use of mixed microbial cultures (MMCs) for the synthesis of volatile fatty acids (VFAs), a critical precursor in PHA production, and solid-state fermentation (SSF) techniques. We also examine the optimization of process parameters such as pH, temperature, and microbial concentration through the application of the Doehlert design, revealing the intricate relationships between these factors and their impact on VFA profiles and PHA yields. Additionally, this paper discusses challenges and future perspectives for enhancing the efficiency and economic viability of PHA production from BSG. By harnessing the untapped potential of BSG, this research contributes to the development of a circular economy model, emphasizing waste valorization and the creation of sustainable alternatives to conventional plastics.

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A comparative analysis of biopolymer production by microbial and bioelectrochemical technologies

Abstract: Biopolymers production from renewable carbon sources.

Cited by 22 publications

References 75 publications

Bacterial-Polyhydroxybutyrate for Biocompatible Microbial Electrodes

Bacterial-Polyhydroxybutyrate for Biocompatible Microbial Electrodes

Reviews in astronomy and space sciences

Harnessing Brewery Spent Grain for Polyhydroxyalkanoate Production

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