Extraction of volatile fatty acids from fermented wastewater

Reyhanitash, Ehsan; Zaalberg, B.; Kersten, Sascha R.A.; Schuur, Boelo

doi:10.1016/j.seppur.2016.01.037

Cited by 98 publications

(72 citation statements)

References 34 publications

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“…reported a large antagonism for 3‐HP extraction upon the addition of NaCl in high concentrations (>1 mol L −1 ) with an extracting system made of TOA in n ‐octanol. When there is no acid in the aqueous phase, the extraction of the salt is negligible, but when there is an organic acid in the solution, the anion concentration decreases while the cation concentration remains unchanged . It seems that while the cation of the salt does not take part in any chemical reaction, the anion is extracted in the organic phase through the formation of an anion pair with ammonium, very similarly to the extraction of the corresponding inorganic acid.…”

Section: Resultsmentioning

confidence: 99%

“…One could have expected a salting‐out effect as for the classic liquid–liquid (non‐reactive) extraction of an organic solute, but salt levels encountered in bioconversion media are not in the order of magnitude for the salting‐out effect. Instead, in the case of reactive extraction, inorganic salts often induce a dramatic reduction of the extraction yield, for example for acetic acid, citric acid and lactic acid . These studies reported the effects of chlorides, phosphates, nitrates and sulfates from sodium, potassium or ammonium salts decreasing the extraction yield.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Chemarin

Athès

Bedu

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Bioconversion broths are complex media with microorganisms that convert substrates into products in the presence of salts and nitrogen sources and that may release biomolecules. This paper deals with the impact of bioconversion broth components on the membrane-based reactive extraction of 3-hydroxypropionic acid (3-HP) by tri-n-octylamine (TOA) in n-decanol in preparation for an in situ product recovery. The focus here is on the influence of 3-HP concentration (0.5-10 g L −1 ), initial pH of the solution (3-5) and presence of proteins and salts on the extraction yield and kinetics.RESULTS: It was found that reducing the initial acid concentration caused an acceleration of the extraction kinetics because of a higher extent of complexation with TOA. pH effects were dramatic, as enhancing the pH from 3 to 5 decreased the extraction yield from 74% to only 5% due to acid dissociation. Proteins were shown to have negligible impact on the extraction yield and kinetics, probably because of their negligible mass transfer resistance at the liquid-liquid interface compared with the membrane. Conversely, the presence of salts (potassium chloride and potassium biphosphate) was highly detrimental. The decrease in extraction yield was shown to be due to an anion exchange between the carboxylate anion of 3-HP in the organic phase and the anion of the salt in the aqueous phase. Chloride ions had more impact than biphosphate ions. CONCLUSION: These results give valuable information for the implementation of a membrane-based reactive extraction as an in situ product recovery process, suggesting recommendations for bioconversion tuning.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Chemarin

Athès

Bedu

et al. 2018

J of Chemical Tech & Biotech

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“…[30] The P 666,14 cation was selected because it showed the best performance in previous extraction experiments. [31] The water from the final wash after synthesisc ontained0 .6 and 8.5 mg L À1 Br À for[ N 8888 ][oleate] and [P 666,14 ][oleate],r espectively.B ecause the ILs were washed with equal volumes of water and bromide is highly hydrophilic, the bromide was considered to be fully exchanged and washed out of the IL. Sodium oleatew as added in slight excessa nd should also be removed during washing with water.T he total organic carbon (TOC) values in the final washing water were 28 [oleate],r espectively.T his is similar to the water contentso fc omparable water-saturated ILs in the literature.…”

Section: Il Synthesismentioning

confidence: 99%

Water‐Based Synthesis of Hydrophobic Ionic Liquids [N₈₈₈₈][oleate] and [P_666,14][oleate] and their Bioprocess Compatibility

et al. 2018

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The conversion of organic waste streams into carboxylic acids as renewable feedstocks results in relatively dilute aqueous streams. Carboxylic acids can be recovered from such streams by using liquid–liquid extraction. Hydrophobic ionic liquids (ILs) are novel extractants that can be used for carboxylic acid recovery. To integrate these ILs as in situ extractants in several biotechnological applications, the IL must be compatible with the bioprocesses. Herein the ILs [P666,14][oleate] and [N8888][oleate] were synthesized in water and their bioprocess compatibility was assessed by temporary exposure to an aqueous phase that contained methanogenic granular sludge. After transfer of the sludge into fresh medium, [P666,14][oleate]‐exposed granules were completely inhibited. Granules exposed to [N8888][oleate] sustained anaerobic digestion activity, albeit moderately reduced. The IL contaminants, bromide (5–500 ppm) and oleate (10–4000 ppm), were shown not to inhibit the methanogenic conversion of acetate. [P666,14] was identified as a bioprocess‐incompatible component. However, our results showed that [N8888][oleate] was bioprocess compatible and, therefore, has potential applications in bioprocesses.

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“…The partition coefficient of a species between two immiscible liquid phases can be considered as an important physicochemical parameter from an engineering perspective, since it can be useful in the recovery of compounds by liquid-liquid extraction [23][24][25][26][27][28][29][30][31]. In our present study [32], we introduced an improved apparatus for continuous liquid-liquid extraction to be used as a tool for the purification of halide-based ionic liquids after the quaternization step.…”

Section: Introductionmentioning

confidence: 99%

Distribution of N-Methylimidazole in Ionic Liquids/Organic Solvents Systems

Bogdanov

Svinyarov

2017

Processes

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Abstract:The partition coefficients, K mim , of N-methylimidazole (mim) in two-component systems composed of ionic liquid (IL) and a series of organic solvents immiscible with ILs (butyl acetate, ethyl acetate, tert-butyl methyl ether, diethyl ether and cyclohexane) were determined by a shake-flask method. The influence of different factors such as temperature, solvent polarity, mim concentration, and water content on K mim by using 1-butyl-3-methylimidazolium chloride {[C 4 C 1 im]Cl} as a model compound was comprehensively studied. The calculated thermodynamic functions of transfer (∆ tr G 0 , ∆ tr H 0 , ∆ tr S 0 ) showed that the mim migration (IL→organic phase) is a thermodynamically unfavorable and enthalpy-determined process in the temperature range of 298.15 to 328.15K; however, the results suggested that mim partition toward the organic phase can be enhanced by the rational manipulation of the extraction conditions. Experiments conducted with other 1-alkyl-3-methylimidazolim chlorides (C n C 1 im]Cl (n = 6, 8, 10) revealed that mim possesses similar behavior and can be successfully washed out from the ILs by extraction with organic solvents. The results obtained in this study give some clues toward the choice of an appropriate solvent and conditions to be employed for the purification of halide-based ILs by means of a liquid-liquid extraction.

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Extraction of volatile fatty acids from fermented wastewater

Cited by 98 publications

References 34 publications

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Water‐Based Synthesis of Hydrophobic Ionic Liquids [N₈₈₈₈][oleate] and [P_666,14][oleate] and their Bioprocess Compatibility

Distribution of N-Methylimidazole in Ionic Liquids/Organic Solvents Systems

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Extraction of volatile fatty acids from fermented wastewater

Cited by 98 publications

References 34 publications

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Towards an in situ product recovery of bio‐based 3‐hydroxypropionic acid: influence of bioconversion broth components on membrane‐assisted reactive extraction

Water‐Based Synthesis of Hydrophobic Ionic Liquids [N8888][oleate] and [P666,14][oleate] and their Bioprocess Compatibility

Distribution of N-Methylimidazole in Ionic Liquids/Organic Solvents Systems

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Water‐Based Synthesis of Hydrophobic Ionic Liquids [N₈₈₈₈][oleate] and [P_666,14][oleate] and their Bioprocess Compatibility