Monophenols separation from monosaccharides and acids by two-stage nanofiltration and reverse osmosis in hydrothermal liquefaction hydrolysates

Hang, Lyu; Fang, Yan; Ren, Shuang; Chen, Kaifei; Luo, Gang; Zhang, Shicheng; Chen, Jianmin

doi:10.1016/j.memsci.2015.12.048

Cited by 28 publications

(12 citation statements)

References 38 publications

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“…There was no discernable difference in the retentions of acrylic acid and acetic acid in both the two membranes ( Figure 4 b,d). The similar results were also reported by other researchers [ 20 , 29 ]. For both the two membranes, the retentions of acrylic acid and acetic acid were about 80% and 78%, respectively.…”

Section: Resultssupporting

confidence: 93%

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Study on the Concentration of Acrylic Acid and Acetic Acid by Reverse Osmosis

Liu

Xie

et al. 2020

Membranes

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In the production of acrylic acid, the concentration of acrylic acid solution from the adsorption tower was low, which would lead to significant energy consumption in the distillation process to purify acrylic acid, along with the production of a large amount of wastewater. Reverse osmosis (RO) was proposed to concentrate the acrylic acid aqueous solution taken from a specific tray in the absorption tower. The effects of operating conditions on the permeate flux and acid retention were studied with two commercial RO membranes (SWC5 and SWC6). When the operating pressure was 4 MPa and the temperature was 25 °C, the permeate fluxes of two membranes were about 20 L·m−2·h−1. The acrylic acid and acetic acid retentions were about 80% and 78%, respectively. After being immersed in the acid solutions for several months, the characteristics of the two membranes were tested to evaluate their acid resistance. After six months of exposure to the acid solution containing 2.5% acrylic acid and 2.5% acetic acid, the retentions of acrylic acid and acetic acid were decreased by 5.7% and 4.1% for SWC5 and 4.9% and 2.2% for SWC6, respectively. The changes of membrane surface morphology and chemical composition showed the hydrolysis of some amide bonds.

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Section: Resultssupporting

confidence: 93%

“…As shown in Figure 2 b, the retentions of acrylic acid and acetic acid were significantly lower than that of NaCl ( Table 1 ). The similar results were also reported in the previous study [ 20 , 27 , 29 , 30 ], as shown in Supplementary Table S1 . The lower acid retention may be attributed to the following two factors.…”

Section: Resultssupporting

confidence: 91%

Study on the Concentration of Acrylic Acid and Acetic Acid by Reverse Osmosis

Liu

Xie

et al. 2020

Membranes

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“…techniques have been used to alter the surface properties of a polymeric or inorganic membrane. Plasma modification is a highly efficient wet-chemical surface Sugarcane juice Formaldehyde, organic acids, chloride, and antifoaming agents Alkaline cleaning at pH = 10-11 [45] Cane molasses Pigments and other molecules interfere with crystallization Disk stack centrifugation removes fine suspended solids and colloidal material [46] Molasses wastewater Concentration polarization resistance Air sparging is able to mitigate membrane fouling [82] Concentrated xylose solution Glucose is conducive to rapid biological fouling 1% (w/v) EDTA, 2% (w/v) citric acid, 1% (w/v) tri-sodium phosphate aqueous solution [32] modifying technique because of its short reaction time, high reproducibility and low environmental impact. Gulec et al [117] modified commercial cellulose acetate membrane via low-pressure plasma polymerization for saccharide separation applications.…”

Section: Nf Membrane Modificationmentioning

confidence: 99%

Nanofiltration for separation and purification of saccharides from biomass

Tan

Luo

et al. 2021

Front. Chem. Sci. Eng.

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Saccharide production is critical to the development of biotechnology in the field of food and biofuel. The extraction of saccharide from biomass-based hydrolysate mixtures has become a trend due to low cost and abundant biomass reserves. Compared to conventional methods of fractionation and recovery of saccharides, nanofiltration (NF) has received considerable attention in recent decades because of its high selectivity and low energy consumption and environmental impact. In this review the advantages and challenges of NF based technology in the separation of saccharides are critically evaluated. Hybrid membrane processes, i.e., combining NF with ultrafiltration, can complement each other to provide an efficient approach for removal of unwanted solutes to obtain higher purity saccharides. However, use of NF membrane separation technology is limited due to irreversible membrane fouling that results in high capital and operating costs. Future development of NF membrane technology should therefore focus on improving material stability, antifouling ability and saccharide targeting selectivity, as well as on engineering aspects such as process optimisation and membrane module design.

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“…At an increased pressure, more solutes are transported to the membrane surface, which causes the concentration polarization and membrane fouling that leads to the reduction of the permeate flux (Zhou et al, 2013a). Under a high concentration slope, the solutes have a tendency to transmigrate though the membrane (Lyu et al, 2016). In general, this phenomenon occurred when batch-filtration mode was applied, and the retentate was recycled back to the feed storage tank and sent back to the filter.…”

Section: Uf Of Mfbmentioning

confidence: 99%

Membrane-Based Downstream Processing of Microbial Xylitol Production

Desiriani¹,

Kresnowati²,

Wenten³

2017

IJTech

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Xylitol is a sugar alcohol used as a sweetener in the food industry. Xylitol can be produced from D-xylose using a fermentation process, but it then needs to be separated from the other components of the fermentation broth (e.g., metabolic products, residual substances, biomass cells, and mineral salts), before being purified as xylitol crystals. Therefore, to obtain high purity xylitol, various separation processes are required. One very promising downstream processing method is membrane separation. This study evaluated membrane-based processes for the separation of biomass cells and other impurities, determined the concentration of xylitol produced from Debaryomyces hansenii yeast fermentation broth, and proposed a polysulfone ultrafiltration (UF) membrane for biomass-cell separation followed by polyamide nanofiltration (NF) to remove low-molecular-weight compounds (e.g., acetic acids) from sugars. The effects of operating pressure were examined using a fermentation broth model solution. The results showed that a higher pressure caused a higher permeate flux; however, the permeate flux's rate flow decreased over time due to concentration polarization, and fouling in the UF and NF membranes. Nevertheless, at all pressures, UF achieved a 99% rejection of biomass cells. In addition, microscope analysis showed that no biomass cells were detected in the permeates of UF. The resulting NF concentrates revealed high xylitol retention and a beneficially lower concentration of acetic acids. The operating pressures of the UF test conditions were 1 barg and 1.5 barg, illustrating that, at a pressure of 5.5 barg, the experiments achieved reasonably high xylitol retention (above 90%) indicating negligible losses of sugar in the permeate port. Moreover, this was proven to be a feasible way to concentrate xylitol up to three times from the initial concentration of the model fermentation broth (MFB). Therefore, the results demonstrated that a two-stage combination of UF and NF is a promising system for the downstream processing of microbial xylitol production.

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Monophenols separation from monosaccharides and acids by two-stage nanofiltration and reverse osmosis in hydrothermal liquefaction hydrolysates

Cited by 28 publications

References 38 publications

Study on the Concentration of Acrylic Acid and Acetic Acid by Reverse Osmosis

Study on the Concentration of Acrylic Acid and Acetic Acid by Reverse Osmosis

Nanofiltration for separation and purification of saccharides from biomass

Membrane-Based Downstream Processing of Microbial Xylitol Production

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