Simulation and optimization of organosolv based lignocellulosic biomass refinery: A review

Sidiras, D.K.; Politi, Dorothea; Giakoumakis, Georgios; Σαλάπα, Ιωάννα

doi:10.1016/j.biortech.2021.126158

Cited by 34 publications

(13 citation statements)

References 137 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To compare different treatment conditions, the severity of an organosolv process may be measured by considering the temperature and the resident time, as follows [ 23 , 24 ]:

SF = logR o …”

Section: Methodsmentioning

confidence: 99%

Polyphenol Release from Wheat Bran Using Ethanol-Based Organosolv Treatment and Acid/Alkaline Catalysis: Process Modeling Based on Severity and Response Surface Optimization

et al. 2022

View full text Add to dashboard Cite

Wheat bran (WB) is globally a major food industry waste, with a high prospect as a bioresource in the production of precious polyphenolic phytochemicals. In this framework, the current investigation had as objectives (i) to use ethanol organosolv treatment and study the effect of acid and alkali catalysts on releasing bound polyphenols, (ii) establish linear and quadratic models of polyphenol recovery based on severity and response surface, and (iii) examine the polyphenolic composition of the extracts generated. Using sulfuric acid and sodium hydroxide as the acid and the alkali catalyst, respectively, it was found that the correlation of combined severity factor with total polyphenol yield was significant in the acid catalysis, but a highly significant correlation in the alkali-catalyzed process was established with modified severity factor, which takes into consideration catalyst concentration, instead of pH. Optimization of the process with response surface confirmed that polyphenol release from WB was linked to treatment time, but also catalyst concentration. Under optimized conditions, the acid- and alkali-catalyzed processes afforded total polyphenol yields of 10.93 ± 0.62 and 19.76 ± 0.76 mg ferulic acid equivalents g−1 dry mass, respectively. Examination of the polyphenolic composition revealed that the alkali-catalyzed process had a striking effect on releasing ferulic acid, but the acid catalysis was insufficient in this regard. The outcome concerning the antioxidant properties was contradictory with respect to the antiradical activity and ferric-reducing power of the extracts, a fact most probably attributed to extract constituents other than ferulic acid. The process modeling proposed herein may be valuable in assessing both process effectiveness and severity, with a perspective of establishing WB treatments that would provide maximum polyphenol recovery with minimum harshness and cost.

show abstract

“…To compare different treatment conditions, the severity of an organosolv process may be measured by considering the temperature and the resident time, as follows [ 23 , 24 ]:

SF = logR o …”

Section: Methodsmentioning

confidence: 99%

Polyphenol Release from Wheat Bran Using Ethanol-Based Organosolv Treatment and Acid/Alkaline Catalysis: Process Modeling Based on Severity and Response Surface Optimization

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Hydrothermal severity process may be evaluated by taking into consideration the temperature and resident time, and it can be used as a criterion in assessing different treatment conditions, as follows [ 47 , 48 ]:

SF = logR o …”

Section: Methodsmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…After solvolysis pretreatment, the lignocellulosic biomass separates into three fractions-precipitated lignin, solid cellulosic pulp, and liquid phase, containing hemicellulosic sugars (Goh et al, 2011). Sidiras et al (2022) reviewed organosolv pretreatment methods and the optimization of feedstock delignification, sugars production, enzymatic digestibility of the cellulose fraction, and quality of lignin.…”

Section: Acid and Alkaline Hydrolysismentioning

confidence: 99%

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Yankov

2022

Front. Chem.

View full text Add to dashboard Cite

The second (lignocellulosic biomass and industrial wastes) and third (algal biomass) generation feedstocks gained substantial interest as a source of various value-added chemicals, produced by fermentation. Lactic acid is a valuable platform chemical with both traditional and newer applications in many industries. The successful fractionation, separation, and hydrolysis of lignocellulosic biomass result in sugars’ rich raw material for lactic acid fermentation. This review paper aims to summarize the investigations and progress in the last 5 years in lactic acid production from inexpensive and renewable resources. Different aspects are discussed—the type of raw materials, pretreatment and detoxification methods, lactic acid-producers (bacteria, fungi, and yeasts), use of genetically manipulated microorganisms, separation techniques, different approaches of process organization, as well as main challenges, and possible solutions for process optimization.

show abstract

Simulation and optimization of organosolv based lignocellulosic biomass refinery: A review

Cited by 34 publications

References 137 publications

Polyphenol Release from Wheat Bran Using Ethanol-Based Organosolv Treatment and Acid/Alkaline Catalysis: Process Modeling Based on Severity and Response Surface Optimization

Polyphenol Release from Wheat Bran Using Ethanol-Based Organosolv Treatment and Acid/Alkaline Catalysis: Process Modeling Based on Severity and Response Surface Optimization

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

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Contact Info

Product

Resources

About