Impact of biopolymer purification on the structural characteristics and transport performance of composite polysaccharide membranes for pervaporation

Meireles, Inês T.; Portugal, Carla A. M.; Alves, Vítor D.; Crespo, João G.; Coelhoso, Isabel M.

doi:10.1016/j.memsci.2015.07.011

Cited by 8 publications

(15 citation statements)

References 26 publications

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“…Although solvent precipitation with ethanol or acetone is the prevalent technique for EPS extraction, it usually yields rather impure polymers with high salts and/or protein contents [ 10 ]. Furthermore, this technique is expensive and impacts the environment due to the large volumes of used solvents and their handling/disposal [ 11 ]. Additional steps can be included in the downstream procedure, such as, for example, dilution of the broth for viscosity reduction or applying a heat treatment to kill bacteria and inactivate enzymes that could degrade the biopolymer during the process [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, this technique is expensive and impacts the environment due to the large volumes of used solvents and their handling/disposal [ 11 ]. Additional steps can be included in the downstream procedure, such as, for example, dilution of the broth for viscosity reduction or applying a heat treatment to kill bacteria and inactivate enzymes that could degrade the biopolymer during the process [ 11 , 12 , 13 ]. However, for high-value applications, in which a higher purity degree is often a prerequisite, specific procedures must be used to reach high-purity products.…”

Section: Introductionmentioning

confidence: 99%

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Extraction of the Bacterial Extracellular Polysaccharide FucoPol by Membrane-Based Methods: Efficiency and Impact on Biopolymer Properties

et al. 2022

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In this study, membrane-based methods were evaluated for the recovery of FucoPol, the fucose-rich exopolysaccharide (EPS) secreted by the bacterium Enterobacter A47, aiming at reducing the total water consumption and extraction time, while keeping a high product recovery, thus making the downstream procedure more sustainable and cost-effective. The optimized method involved ultrafiltration of the cell-free supernatant using a 30 kDa molecular weight cut-off (MWCO) membrane that allowed for a 37% reduction of the total water consumption and a 55% reduction of the extraction time, compared to the previously used method (diafiltration-ultrafiltration with a 100 kDa MWCO membrane). This change in the downstream procedure improved the product’s recovery (around 10% increase) and its purity, evidenced by the lower protein (8.2 wt%) and inorganic salts (4.0 wt%) contents of the samples (compared to 9.3 and 8.6 wt%, respectively, for the previously used method), without impacting FucoPol’s sugar and acyl groups composition, molecular mass distribution or thermal degradation profile. The biopolymer’s emulsion-forming and stabilizing capacity was also not affected (emulsification activity (EA) with olive oil, at a 2:3 ratio, of 98 ± 0% for all samples), while the rheological properties were improved (the zero-shear viscosity increased from 8.89 ± 0.62 Pa·s to 17.40 ± 0.04 Pa·s), which can be assigned to the higher purity degree of the extracted samples. These findings demonstrate a significant improvement in the downstream procedure raising FucoPol’s recovery, while reducing water consumption and operation time, key criteria in terms of process economic and environmental sustainability. Moreover, those changes improved the biopolymer’s rheological properties, known to significantly impact FucoPol’s utilization in cosmetic, pharmaceutical or food products.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extraction of the Bacterial Extracellular Polysaccharide FucoPol by Membrane-Based Methods: Efficiency and Impact on Biopolymer Properties

et al. 2022

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“…Some polysaccharides recovered from microbial fermentation broths have also been explored in the field [80,81]. Meireles et al [81] evaluated the performance in the dehydration process of exopolysaccharide, FucoPol, produced by Enterobacter A47.…”

Section: Biopolymers: the Promising Materials In Membrane Preparatmentioning

confidence: 99%

New Trends in Biopolymer-Based Membranes for Pervaporation

Castro-Muñoz

González‐Valdez

2019

Molecules

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Biopolymers are currently the most convenient alternative for replacing chemically synthetized polymers in membrane preparation. To date, several biopolymers have been proposed for such purpose, including the ones derived from animal (e.g., polybutylene succinate, polylactic acid, polyhydroxyalcanoates), vegetable sources (e.g., starch, cellulose-based polymers, alginate, polyisoprene), bacterial fermentation products (e.g., collagen, chitin, chitosan) and specific production processes (e.g., sericin). Particularly, these biopolymer-based membranes have been implemented into pervaporation (PV) technology, which assists in the selective separation of azeotropic water-organic, organic-water, organic-organic mixtures, and specific separations of chemical reactions. Thereby, the aim of the present review is to present the current state-of-the-art regarding the different concepts on preparing membranes for PV. Particular attention is paid to the most relevant insights in the field, highlighting the followed strategies by authors for such successful approaches. Finally, by reviewing the ongoing development works, the concluding remarks and future trends are addressed.

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“…The most important disadvantage of reactive distillation is high energy consumption and high cost, and high reflux ratio requires If the feed solution or reaction solution forms azeotropic mixture, the reactive distillation process cannot be used [8]. Pervaporation is important alternative process due to the low energy consumption, environmentally friendly technology, no need to additional chemical [9][10][11][12][13]. The low flux value is an important disadvantage of the pervaporation process.…”

Section: Introductionmentioning

confidence: 99%

Esterleşme Reaksiyonlarında Katalitik Membran Destekli Pervaporasyon Uygulamaları

Ünlü

2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Kimya endüstrisinin gelişmesi, çeşitli kimyasal ve fiziksel işlemlerde daha fazla çözücü kullanılmasına neden olmuştur. Kullanılan solvent miktarının artması da sektöre olan ekonomik yükü arttırmaktadır. Çözücülerin geri kazanılması, yeniden kullanılması ve saflaştırılması endüstrinin temel gereksinimleri haline gelmiştir. Ayrıca yüksek kaliteli, düşük çevresel etkili, verimi yüksek, ekonomik ürün elde edilmesi önemlidir. Katalitik membran destekli pervaporasyon uygulaması, endüstrilerdeki hem reaksiyon hem de ayırma problemlerine yeni alternatif çözümlerinden biri olarak kabul edilmektedir. Katalitik membran destekli pervaporasyon uygulaması gelişen membran teknolojilerinden biridir. Ayırma ve reaksiyon birimlerini birleştiren hibrit ve entegre bir süreçtir. Bu çalışma, esterleştirme reaksiyonlarının katalitik membran destekli pervaporasyon uygulamaları üzerine yoğunlaşmıştır. İlk olarak, katalitik membran, pervaporasyon ve katalitik membran destekli pervaporasyon hakkında bazı önemli bilgiler verilmiştir. Katalitik membran destekli pervaporasyonun farklı konfigürasyonları tanımlanmış ve açıklanmıştır. Hibrit katalitik membran destekli pervaporasyon işlemlerinin avantajları listelenmiştir. Katalitik membran destekli pervaporasyonu etkileyen faktörler kısaca tartışılmıştır. Literatürdeki önemli katalitik membran destekli pervaporasyon çalışmaları, çalışma koşulları ve elde edilen sonuçlar özetlenmiştir.

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Impact of biopolymer purification on the structural characteristics and transport performance of composite polysaccharide membranes for pervaporation

Cited by 8 publications

References 26 publications

Extraction of the Bacterial Extracellular Polysaccharide FucoPol by Membrane-Based Methods: Efficiency and Impact on Biopolymer Properties

Extraction of the Bacterial Extracellular Polysaccharide FucoPol by Membrane-Based Methods: Efficiency and Impact on Biopolymer Properties

New Trends in Biopolymer-Based Membranes for Pervaporation

Esterleşme Reaksiyonlarında Katalitik Membran Destekli Pervaporasyon Uygulamaları

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