Highly selective recovery of medium chain carboxylates from co-fermented organic wastes using anion exchange with carbon dioxide expanded methanol desorption

Fernando-Foncillas, Clara; Cabrera-Rodríguez, Carlos I.; Caparrós-Salvador, Francisco; Varrone, Cristiano; Straathof, Adrie J. J.

doi:10.1016/j.biortech.2020.124178

Cited by 21 publications

(8 citation statements)

References 31 publications

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“…To achieve effective carboxylic acid production by fermentation, the broth must be titrated with a base to retain the pH neutrality as an acidic environment inhibits the metabolism of the microorganisms [56]. Thus, the pH of the fermentation broth during mixed microbial culture is usually between 5 and 7, which is higher than the pK a of the acids, and as a result, carboxylate anions dominate over undissociated acids in the broth [57]. Hence, separation with an anion exchange resin does not require pH adjustment.…”

Section: Functionalized Synthetic Polyaromatic Resins Anion Exchange ...mentioning

confidence: 99%

“…Therefore, there is no need to adjust the pH of the fermentation broth to protonate the carboxylates. Moreover, ion exchange resins do not require high energy demand, compared to methods such as nanofiltration and electrodialysis [57]. However, the regeneration of these resins involves adding extra chemicals to protonate the carboxylates, which result in the coproduction of stoichiometric amounts of salt.…”

Section: Comparative Assessment Of Various Desorption Techniquesmentioning

confidence: 99%

“…Because the MCCAs are toxic for the microorganism due to their high hydrophobicity, which causes a disruption in the cell membrane [69], in situ separation of these acids is required to reduce acid production inhibition [70]. Various separation technologies have been applied for in situ recovery of the MCCAs from the fermentation broth, including electrolysis [8], membrane-based liquid-liquid extraction (i.e., pertraction) [9], adsorption with AEX resins [57,71] and electrodialysis/phase separation [11].…”

Section: Recovery Of Bio-based Medium-chain Carboxylic Acidsmentioning

confidence: 99%

“…Furthermore, this resin showed suitable reusability for at least eight adsorption-desorption cycles using 1.5 M NaOH solution as an eluent to recover the adsorbed acids. Recently, Fernando-Foncillas et al [57] investigated the performance of the CO 2 -expanded alcohol technique to desorb the loaded MCCAs on AEX resins. This technique was able to concentrate hexanoate and heptanoate up to 4.6 and 20.7 times, respectively.…”

Section: Adsorption Using Anion Exchange Resinsmentioning

confidence: 99%

“…In comparison to membrane-based extraction and electrodialysis, adsorption with ion exchange resins reduces the costs due to the avoided membrane fouling and corresponding high energy demand [57]. Moreover, it might be possible to concentrate the MCCAs above their solubility using a proper resin and regeneration eluent.…”

Section: Adsorption Using Anion Exchange Resinsmentioning

confidence: 99%

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Recovery Techniques Enabling Circular Chemistry from Wastewater

et al. 2022

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In an era where it becomes less and less accepted to just send waste to landfills and release wastewater into the environment without treatment, numerous initiatives are pursued to facilitate chemical production from waste. This includes microbial conversions of waste in digesters, and with this type of approach, a variety of chemicals can be produced. Typical for digestion systems is that the products are present only in (very) dilute amounts. For such productions to be technically and economically interesting to pursue, it is of key importance that effective product recovery strategies are being developed. In this review, we focus on the recovery of biologically produced carboxylic acids, including volatile fatty acids (VFAs), medium-chain carboxylic acids (MCCAs), long-chain dicarboxylic acids (LCDAs) being directly produced by microorganisms, and indirectly produced unsaturated short-chain acids (USCA), as well as polymers. Key recovery techniques for carboxylic acids in solution include liquid-liquid extraction, adsorption, and membrane separations. The route toward USCA is discussed, including their production by thermal treatment of intracellular polyhydroxyalkanoates (PHA) polymers and the downstream separations. Polymers included in this review are extracellular polymeric substances (EPS). Strategies for fractionation of the different fractions of EPS are discussed, aiming at the valorization of both polysaccharides and proteins. It is concluded that several separation strategies have the potential to further develop the wastewater valorization chains.

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Section: Functionalized Synthetic Polyaromatic Resins Anion Exchange ...mentioning

confidence: 99%

Section: Comparative Assessment Of Various Desorption Techniquesmentioning

confidence: 99%

Section: Recovery Of Bio-based Medium-chain Carboxylic Acidsmentioning

confidence: 99%

Section: Adsorption Using Anion Exchange Resinsmentioning

confidence: 99%

Section: Adsorption Using Anion Exchange Resinsmentioning

confidence: 99%

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Recovery Techniques Enabling Circular Chemistry from Wastewater

et al. 2022

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Bioenergy and bioproducts from cashew apple bagasse: a scientometric overview and strategies for sustainable utilization

Barroso,

Ferreira,

Castro

et al. 2024

Biofuels Bioprod Bioref

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The potential of cashew apple bagasse in advancing a circular bioeconomy is being recognized increasingly. Traditionally viewed as a mere byproduct, this agroindustrial residue is acknowledged for its value in producing biofuels and bioproducts through innovative processes. This review highlights the growing research on cashew apple bagasse, emphasizing its nutritional potential and versatility as a biomass platform for generating products. Advances in pretreatment and fermentation strategies have enhanced bioprocess efficiency and aligned these processes with sustainability goals by utilizing residual materials and reducing environmental impacts. Cashew apple bagasse has also demonstrated considerable promise for enzymatic applications, including enzyme immobilization and biopolymer production, such as polylactic acid. These applications offer eco‐friendly alternatives to conventional petroleum‐based products. Emerging trends in bioenergy research underscore the importance of overcoming technical challenges related to biomass pretreatment, carbon capture, and sustainable production technologies. Innovations in digital financing, artificial intelligence, and hydrogen production are pivotal for the commercial viability of biorefineries. Overall, the promising findings from studies on cashew apple bagasse highlight its crucial role in renewable energy and bioproducts, reinforcing its potential to contribute significantly to a sustainable and circular economy.

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Methacrylonitrile‐based adsorbents for recovery of VFAs from fermentation broth

Elhami,

Ronka,

Schuur

2024

J of Chemical Tech & Biotech

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BACKGROUNDAdsorption is a promising affinity separation technique to target a sorbate in extremely dilute solutions. In this work, methacrylonitrile (MAN)‐functionalized resins were investigated to recover volatile fatty acids (VFAs) from a mimicked fermentation broth as an alternative for the already known amine‐based resins and non‐functionalized poly(styrene‐divinylbenzene) (PS‐DVB), aiming for high VFA capacity and selectivity.RESULTSNext to comparison with commercial PS‐DVB resin, also several PS‐DVB resins were synthesized as non‐functionalized analogues for the new MAN‐functionalized resins. For MAN‐functionalized resins, the maximum equilibrium VFA loading of about 153 (g acid/kg adsorbent) was found, which is higher than the 125 (g acid/kg adsorbent) for the PS‐DVB non‐functionalized resins. The water uptake of the PS‐DVB resins was with 0.53–0.87 (g water/g adsorbent) significantly lower than for the MAN‐DVB resins taking up 0.99–1.85 (g water/g adsorbent).CONCLUSIONOverall, the MAN‐functionalized adsorbents retained higher loading capacity for corresponding acid, compared to the PS‐DVB resins, while also taking in more water. Acid uptake is due to the hydrogen bonding between the nitrile groups of the resins with carboxyl group of the acids. Moreover, none of the adsorbents displayed an affinity towards the salts present in the fermentation broth. © 2024 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Highly selective recovery of medium chain carboxylates from co-fermented organic wastes using anion exchange with carbon dioxide expanded methanol desorption

Cited by 21 publications

References 31 publications

Recovery Techniques Enabling Circular Chemistry from Wastewater

Recovery Techniques Enabling Circular Chemistry from Wastewater

Bioenergy and bioproducts from cashew apple bagasse: a scientometric overview and strategies for sustainable utilization

Methacrylonitrile‐based adsorbents for recovery of VFAs from fermentation broth

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