The Production of High-Added-Value Bioproducts from Non-Conventional Biomasses: An Overview

Monteiro, Alcilene Rodrigues; Battisti, Andrei Pavei; Valencia, Germán Ayala; Andrade, Cristiano José de

doi:10.3390/biomass3020009

Cited by 8 publications

(4 citation statements)

References 95 publications

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“…Particularly for the agri-food sector, there is an explicit diagnosis that it is a major contributor in generating highly polluting side-streams and processing residues, whose uncontrolled disposal and improper handling may have detrimental consequences on the environment. The acknowledgement of this fact has shifted strategies toward adopting sustainable production models, within various circular economy frames [ 1 , 2 ], which aim at valorizing food processing wastes as raw materials for the production of bio-fuels, energy, value-added chemicals, and platform molecules [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Treatment of Wheat Bran under Mild Acidic or Alkaline Conditions for Enhanced Polyphenol Recovery and Antioxidant Activity

Papadaki,

Grigorakis,

Palaiogiannis

et al. 2024

Molecules

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This study was undertaken to investigate the effects of hydrothermal treatments under mild acid and alkaline conditions on polyphenol release and recovery from wheat bran (WB). After an initial screening of various food-grade substances, strong evidence was raised regarding the potency of citric acid and sodium carbonate to provide WB extracts exceptionally enriched in polyphenols. Thus, these two catalysts were tested under various time and temperature combinations, and the processes were described by linear models based on severity factor. The most effective treatments were those performed with 10% of either citric acid or sodium carbonate, at a constant temperature of 90 °C for 24 h, providing yields in total polyphenols of 23.76 and 23.60 mg g−1 dry mass of ferulic acid equivalents, respectively. Liquid chromatography–mass spectrometry analyses revealed that, while the sodium carbonate treatment afforded extracts enriched in ferulic acid, treatments with citric acid gave extracts enriched in a ferulate pentose ester. The extracts produced from those treatments also exhibited diversified antioxidant characteristics, a fact ascribed to the different polyphenolic composition. To the best of the authors’ knowledge, this is the first report demonstrating the effective release of ferulic acid and a ferulate pentose ester from WB, using benign acid and alkali catalysts, such as citric acid and sodium carbonate.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Treatment of Wheat Bran under Mild Acidic or Alkaline Conditions for Enhanced Polyphenol Recovery and Antioxidant Activity

Papadaki,

Grigorakis,

Palaiogiannis

et al. 2024

Molecules

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“…In this context, biorefinery concepts hold key roles in waste exploitation and the production of biomass-based energy, platform chemical compounds, and high value-added commodities. The latter category may include a number of bio-molecules with functional properties, which make them suitable additives in food and cosmetic products, and active constituents in pharmaceuticals and food supplements [1].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonication-Assisted Aqueous Extraction of Waste Orange Peel Polyphenols: Optimization of Process Variables and Effect on Extract Composition

Belsi,

Vogiatzi,

Palaiogiannis

et al. 2024

Compounds

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The citrus processing industry is responsible for the generation of large volumes of waste side streams, represented principally by fruit peels. These tissues are exceptionally rich in polyphenolic bioactive phytochemicals, and there has been a great industrial interest for their valorization. The examination presented herein targeted at developing a fast and straight-forward aqueous extraction process, based on ultrasonication, for the efficacious recovery of polyphenolic compounds from waste orange peels. After an initial single-factor examination, the response surface optimization showed that a maximum total polyphenol yield of 12.81 mg chlorogenic acid equivalents (GAE) per g−1 dry mass could be achieved by setting sonicator amplitude at 80%, for 15 min, using a duty cycle of 2/2 (2 s on/2 s off). Comparison of this methodology with a stirred-tank extraction demonstrated that the ultrasonication technique was equally effective, requiring ambient temperature and considerably shorter resident time. The combination of both techniques using the ultrasonication process as a pretreatment step did not boost extraction yield, and the extracts produced had similar polyphenolic composition and antioxidant activity. However, a slight enhancement of the recovery of individual constituents was noted. It is proposed that efficient extraction of polyphenolic substances from waste orange peels may be accomplished using the present methodology, which is a low-cost (ambient temperature, short time) and sustainable (water as solvent) process.

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“…As a result, circular economy aspects are becoming universally accepted by embracing sustainable routes of agricultural development and food manufacturing. Valorization of food wastes to produce Environments 2023, 10, 118 2 of 14 energy, high-value molecules, and plant-based chemicals is one of the key tenets of circular economy methods [3,4].…”

Section: Introductionmentioning

confidence: 99%

Alkali-Catalyzed Organosolv Treatment of Oat Bran for Enhanced Release of Hydroxycinnamate Antioxidants: Comparison of 1- and 2-Propanol

Guenaoui,

Casasni,

Grigorakis

et al. 2023

Environments

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Oat bran (OB) may be regarded as food industry by-product, with a high perspective as a bioresource in the production of high-value polyphenolic substances. On this basis, the investigation presented herein aimed at (i) using 1- and 2-propanol organosolv treatment and studying the effect of an alkali (sodium hydroxide) catalyst on releasing bound polyphenols, (ii) establishing models of polyphenol recovery by employing severity and response surface methodology, and (iii) investigating the polyphenolic profile of the extracts produced. Yield in total polyphenols as a function of treatment severity was satisfactorily described by linear models, indicating that for both 1- and 2-propanol treatments, temperature and time could be used interchangeably to adjust severity. Furthermore, the 1-propanol process was found to be more efficient at lower severity compared to the 2-propanol process. The optimization using response surface methodology revealed that, under identical condition settings (t = 300 min, T = 90 °C), the 1-propanol treatment afforded a total polyphenol yield of 17.15 ± 0.51 mg ferulic acid equivalents per g−1 dry mass, whereas the 2-propanol treatment gave a yield of 14.78 ± 1.11 mg ferulic acid equivalents per g−1 dry mass. Liquid chromatography–tandem mass spectrometry analyses showed that the extract produced from the 1-propanol treatment was significantly more enriched in ferulic acid and p-coumaric acid compared to the extract generated with the 2-propanol treatment. Moreover, the antioxidant activity of the extracts was in concurrence with the polyphenolic composition. Based on the evidence, the alkali-catalyzed, 1-propanol organosolv treatment of OB is proposed as a sustainable and efficient methodology to recover multipurpose natural antioxidants.

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The Production of High-Added-Value Bioproducts from Non-Conventional Biomasses: An Overview

Cited by 8 publications

References 95 publications

Hydrothermal Treatment of Wheat Bran under Mild Acidic or Alkaline Conditions for Enhanced Polyphenol Recovery and Antioxidant Activity

Hydrothermal Treatment of Wheat Bran under Mild Acidic or Alkaline Conditions for Enhanced Polyphenol Recovery and Antioxidant Activity

Ultrasonication-Assisted Aqueous Extraction of Waste Orange Peel Polyphenols: Optimization of Process Variables and Effect on Extract Composition

Alkali-Catalyzed Organosolv Treatment of Oat Bran for Enhanced Release of Hydroxycinnamate Antioxidants: Comparison of 1- and 2-Propanol

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