Recent trends in lactic acid-producing microorganisms through microbial fermentation for the synthesis of polylactic acid

Balasubramanian, Vignesh Kumar; Muthuramalingam, Jothi Basu; Chen, Yen-Po; Chou, Jui-Yu

doi:10.1007/s00203-023-03745-z

Cited by 7 publications

(2 citation statements)

References 114 publications

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“…For example, strains of Lactobacillus rhamnosus and Lactobacillus delbrueckii have shown promising results. Additionally, genetically engineered yeast strains like those from the Saccharomyces cerevisiae species have been modified to improve lactic acid production (Balasubramanian et al 2024 ). However, taking advantage from previous results concerning Lactobacillus casei fermentation on non-lignocellulosic food waste (Dedenaro et al 2016 ), we decided to test it even on second-generation feedstocks.…”

Section: Discussionmentioning

confidence: 99%

2G-lactic acid from olive oil supply chain waste: olive leaves upcycling via Lactobacillus casei fermentation

Gugel,

Marchetti,

Costa

et al. 2024

Appl Microbiol Biotechnol

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The transition towards a sustainable model, particularly the circular economy, emphasizes the importance of redefining waste as a valuable resource, paving the way for innovative upcycling strategies. The olive oil industry, with its significant output of agricultural waste, offers a promising avenue for high-value biomass conversion into useful products through microbial processes. This study focuses on exploring new, high-value applications for olive leaves waste, utilizing a biotechnological approach with Lactobacillus casei for the production of second-generation lactic acid. Contrary to initial expectations, the inherent high polyphenol content and low fermentable glucose levels in olive leaves posed challenges for fermentation. Addressing this, an enzymatic hydrolysis step, following a preliminary extraction process, was implemented to increase glucose availability. Subsequent small-scale fermentation tests were conducted with and without nutrient supplements, identifying the medium that yielded the highest lactic acid production for scale-up. The scaled-up batch fermentation process achieved an enhanced conversion rate (83.58%) and specific productivity (0.26 g/L·h). This research confirms the feasibility of repurposing olive waste leaves for the production of lactic acid, contributing to the advancement of a greener economy through the valorization of agricultural waste. Key points • Olive leaves slurry as it did not allow L. casei to ferment. • High concentrations of polyphenols inhibit fermentation of L. casei. • Enzymatic hydrolysis combined to organosolv extraction is the best pretreatment for lactic acid production starting from leaves and olive pruning waste. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%

2G-lactic acid from olive oil supply chain waste: olive leaves upcycling via Lactobacillus casei fermentation

Gugel,

Marchetti,

Costa

et al. 2024

Appl Microbiol Biotechnol

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“…Fermentable sugars must first be obtained. Fermentation and subsequent treatment are the next phases in this method of turning fermentable carbohydrates into biofuels [45,46]. Let's dissect the procedure in more depth:…”

Section: • Utilization Of Fermentable Sugarsmentioning

confidence: 99%

A Brief Analysis of The Production of Building Materials Utilizing Waste-Based Reinforcements and Recycled Textiles

Chohan,

et al. 2024

Int. Res. J. multidiscip. Technovation

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The utilization of composite materials in construction has recently exerted a significant impact on society, particularly concerning ecological responsibility and environmental considerations. On a daily basis, proposals advocating the use of emerging materials crafted from discarded or repurposed items are put forth to transcend the limitations posed by conventional resources. One notable aspect of this movement revolves around textile components, encompassing fibres such as wool, cotton, cannabis, and flax. Over the past decade, there has been a heightened focus on worn clothing, as it represents an unprocessed product that holds both commercial viability and ecological benefits. Approximately 1.5 percent of the global waste generated daily comprises textile scraps, with blue jeans, crafted from cotton, standing out as the most prevalent type of apparel worldwide. Textile scraps find new life through recycling, serving various purposes such as the creation of electrical wires, the production of pulverized substances for temperature and acoustic insulation materials, and the incorporation as filler or reinforcement in concrete construction. This paper delves into multiple themes, covering (i) the adverse environmental impacts stemming from the extensive use of clothing; (ii) the recycling and reclamation of textile waste; and (iii) the utilization of waste and reclaimed materials from textiles as building components.

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Green Engineering: Poly (lactic acid) Composite Materials Fortified with Surface-Modified Nanocellulose from Borassus flabellifer Leaves

Chakraborty,

Ghalsasi,

Radha

2024

Biomass Conv. Bioref.

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Recent trends in lactic acid-producing microorganisms through microbial fermentation for the synthesis of polylactic acid

Cited by 7 publications

References 114 publications

2G-lactic acid from olive oil supply chain waste: olive leaves upcycling via Lactobacillus casei fermentation

2G-lactic acid from olive oil supply chain waste: olive leaves upcycling via Lactobacillus casei fermentation

A Brief Analysis of The Production of Building Materials Utilizing Waste-Based Reinforcements and Recycled Textiles

Green Engineering: Poly (lactic acid) Composite Materials Fortified with Surface-Modified Nanocellulose from Borassus flabellifer Leaves

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