Liquid-liquid equilibria for (volatile fatty acids + water + alcohol ethoxylates): Experimental measurement of pseudo-ternary systems

Belgodere, Jorge A.; Revellame, Emmanuel; Hernández, Rafael; Holmes, William E.; Collazos, Lance; Bajpai, R.; Zappi, Mark E.

doi:10.1016/j.jct.2018.08.027

Cited by 4 publications

(5 citation statements)

References 28 publications

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“…The distribution coefficients, D i , and separation factors, S, of the LLE data for lactic acid (i = 1) and water (i = 2), and the lactic acid extraction efficiency, E(%), were calculated using the following equations [28,41]:…”

Section: Liquid-liquid Equilibrium (Lle) Datamentioning

confidence: 99%

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The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

et al. 2020

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Lactic acid, an important commodity chemical for various applications, is mainly produced through fermentation. In this study, the potential of non-ionic surfactants (an alcohol ethoxylate (AE) and two alcohol alkoxylates (AAs)) as solvents for the extraction of lactic acid from aqueous solutions is reported for the first time. Ternary mixtures containing lactic acid, water, and surfactants were prepared for the assessment. The results indicated that for all the systems, the water–surfactant binary pair exhibits partial immiscibility. Furthermore, the results suggested that with respect to the size of the two-phase region and stability of phases developed, the AE is the suitable solvent for the targeted extraction process. Thus, tie-lines for the system lactic acid + water + AE were then determined to establish the phase diagram of the system at 308.15 K. From the tie-lines, distribution coefficients and separation factors were estimated, which indicated that a compromise between the size and number of extraction units is necessary if AE is to be used as a solvent for lactic acid extraction. The extraction efficiency was estimated to be only about 37–48%. Nevertheless, the biodegradability and non-toxicity of AE makes it a viable solvent for the development of the extractive lactic acid fermentation process.

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Section: Liquid-liquid Equilibrium (Lle) Datamentioning

confidence: 99%

“…Supplier provided properties 2. The purity of the sample used in this study was previously determined by GC-MS[28] 3. The actual purity of the surfactant was not determined since no quantitation was performed for ternary systems involving the surfactant.…”

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The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

et al. 2020

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“…Additionally, with stricter regulations, declining landfill capacity, and heightened environmental concerns, a key challenge for WWTPs is to redirect these biosolids to processes that could potentially offer some revenue. 8 Previous studies indicated that activated sludge microbial consortia (ASMC) are capable of accumulating lipids when cultivated in a N-limited environment with abundant carbon sources, particularly when C/N mass ratio is ≥40. 9−13 These previous works had the ultimate goal of utilizing existing WWTPs for production of microbial lipids, which can be used as bioenergy and/or biomaterial precursors.…”

Section: ■ Introductionmentioning

confidence: 99%

“…With the continuously increasing landfill tipping fees, disposal of these wastes is and will be a significant expenditure for the wastewater treatment industry. Additionally, with stricter regulations, declining landfill capacity, and heightened environmental concerns, a key challenge for WWTPs is to redirect these biosolids to processes that could potentially offer some revenue …”

Section: Introductionmentioning

confidence: 99%

Microbial Lipid Production through Integrated Anaerobic-Aerobic Biotreatment Process: An Urban-Based Biorefinery Concept

Revellame

Zappi

Hernández

et al. 2021

ACS Sustainable Chem. Eng.

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Current operations within wastewater treatment plants (WWTPs), particularly the anaerobic digestion and activated sludge processes, can be tapped for production of microbial lipids. This can be accomplished by directing the anaerobic digestion to produce short chain carboxylic acids (SCCAs) that can then be used as substrates for lipid production using activated sludge microbial consortium in an add-on aerobic lipid production unit (similar to an activated sludge process). This study was conducted to assess the suitability of a Test Medium (previously proven suitable for aerobic lipid production in activated sludge) for the proposed integrated system. Results showed that, when used for anaerobic fermentation, the Test medium produced 0.48 g-SCCAs/g-substrate that includes acetic, butyric, and predominantly (∼89 wt%), lactic acid. Subsequently, the Test Medium resulted to a peak lipid yield of ∼0.17 g/g-SCCAs. Complete substrate consumptions were observed without pH control when the Test Medium was used for both bioprocesses. These results suggest the suitability of the Test Medium for the integrated system for microbial lipids production. This could significantly simplify the implementation of the proposed integrated system, which could provide the basis for future urban biorefineries through existing WWTPs.

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“…Diethyl succinate (DES) is a diester that occurs naturally in plants. It can be used as a flavoring agent, in fragrances, synthesis of polyesters, plasticizers, food additives, chemical intermediates [1][2][3][4], and as a solvent to recover carboxylic acids [5]. A potential method of recovery of DES from plants is via extraction with supercritical carbon dioxide (scCO2).…”

Section: Introductionmentioning

confidence: 99%

Phase equilibrium measurements and thermodynamic modeling of {CO2 + diethyl succinate + cosolvent} systems

Petza

Grilla

Capeletto

et al. 2019

Fluid Phase Equilibria

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This work reports experimental phase equilibrium data for the binary systems {CO2(1) + diethyl succinate(2)} and {CO2(1) + ethyl acetate(2)}, and for the ternary systems {CO2(1) + diethyl succinate(2) + ethanol(3)} and {CO2(1) + diethyl succinate(2) + ethyl acetate(3)}.The experiments for the binary system {CO2(1) + diethyl succinate(2)} were carried out at temperatures ranging from 308 K to 358 K, and temperatures ranging from 303 K to 343 K for {CO2(1) + ethyl acetate(2)} as well as for all ternary systems. Only vapor-liquid equilibria were observed for all systems. The experimental measurements were carried out in a high-pressure variable-volume view cell containing a movable piston, which allows pressure control inside the cell. Binary and ternary systems were modeled with the Peng-Robinson cubic equation of state with the van der Waals quadratic mixing rule (vdW2).The presence of a cosolvent (ethanol and ethyl acetate) decreased the saturation pressures of either bubble or dew points compared to the binary system CO2 + diethyl succinate, increasing the solubility of diethyl succinate in CO2.

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Liquid-liquid equilibria for (volatile fatty acids + water + alcohol ethoxylates): Experimental measurement of pseudo-ternary systems

Cited by 4 publications

References 28 publications

The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

Microbial Lipid Production through Integrated Anaerobic-Aerobic Biotreatment Process: An Urban-Based Biorefinery Concept

Phase equilibrium measurements and thermodynamic modeling of {CO2 + diethyl succinate + cosolvent} systems

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Liquid-liquid equilibria for (volatile fatty acids + water + alcohol ethoxylates): Experimental measurement of pseudo-ternary systems

Cited by 4 publications

References 28 publications

The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution

Microbial Lipid Production through Integrated Anaerobic-Aerobic Biotreatment Process: An Urban-Based Biorefinery Concept

Phase equilibrium measurements and thermodynamic modeling of {CO2 + diethyl succinate + cosolvent} systems

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Product

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Liquid-liquid equilibria for (volatile fatty acids + water + alcohol ethoxylates): Experimental measurement of pseudo-ternary systems