Volatile fatty acid adsorption on anion exchange resins: kinetics and selective recovery of acetic acid

Eregowda, Tejaswini; Rene, Eldon R.; Rintala, Jukka; Lens, Piet N.L.

doi:10.1080/01496395.2019.1600553

Cited by 33 publications

(22 citation statements)

References 31 publications

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“…The tests were performed in batch mode in 15 mL falcons with a working volume of 10 mL and 0.5 g (50 g adsorbent/L) of solid matrices, following the procedure of some previous works (Eregowda et al, 4 Yousuf et al 14 ). The operative temperature of the adsorption tests was 30 °C, which was consistent with the mesophilic conditions conventionally adopted for the acidogenic fermentation of VFAs.…”

Section: Methodsmentioning

confidence: 99%

“…3 VFAs are mainly produced via non-renewable resources and fossil oils; however, rising concerns about environmental safety and the progressive depletion of petroleum reserves have increased interest in ecologically based production of VFAs, such as acidogenic fermentation of household, industrial, and agricultural wastes. 4 According to their chemical composition, different substrates could have specific optimal fermentation conditions. Conventionally, the best operative conditions for acidogenic fermentation are as follows: neutral pH range (6.0−7.0), hydraulic retention time (HRT) lower than 10 days, organic loading rate of 10 kg VS /m 3 d, mineral acid addition (0.5− 3.0%), and thermal pretreatment (140−170 °C).…”

Section: Introductionmentioning

confidence: 99%

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Volatile Fatty Acid Recovery from Anaerobic Fermentate: Focusing on Adsorption and Desorption Performances

Rizzioli

Battısta

Bolzonella

et al. 2021

Ind. Eng. Chem. Res.

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The purification and concentration of volatile fatty acids (VFAs) after acidogenic fermentation represent the key steps for their industrial use. In this study, different batch adsorption tests were performed on single VFAs using powdered activated carbon (PAC), Lewatit VP OC 1065, Amberlyst A21, and VFA mixtures using Lewatit and Amberlyst. Adsorption yields of approximately 70% for PAC and 86–96% for Lewatit and Amberlyst were achieved on the single VFA tests at an initial concentration of 5 g/L. The VFA mixture tests at 25 g/L showed lower yields: 40 and 27% for Lewatit and Amberlyst, respectively. Batch desorption tests were performed adopting two desorbents, ethanol, and water at various NaOH concentrations (1, 0.1, and 0.01 M) and at decreasing volumes (5, 3, and 2 mL). The optimization of the adsorption and desorption operations allowed the final VFA concentrations of 85–90 g/L to be reached. The best adsorbent, Lewatit, and the best desorption conditions were applied on a real fermentate with an initial VFA concentration of approximately 18 g/L, obtaining a final VFA content three times higher than in the original solution.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Volatile Fatty Acid Recovery from Anaerobic Fermentate: Focusing on Adsorption and Desorption Performances

Rizzioli

Battısta

Bolzonella

et al. 2021

Ind. Eng. Chem. Res.

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show abstract

“…The data for adsorption of fatty acids onto resin was fitted using pseudo‐first order, pseudo‐second order or Elovich kinetic models. The pseudo‐first order, pseudo‐second order, and Elovich kinetic models can be represented by Eqns (1), (2) and (3), 20 respectively,

\log (q_{e} - q_{t}) = \log q_{e} - k_{d} t / 2.303

\frac{t}{q_{e}} = \frac{1}{k_{2} q_{e}^{2}} + \frac{1}{q_{e}} t

q_{t} = β \ln α β + \ln t

where, q e and q t represent amount of fatty acid adsorbed (mg g −1 of resin) at equilibrium and at time t , respectively; k d (min −1 ) is the pseudo‐first‐order rate constant; k 2 is the pseudo‐second order rate constant (mg g −1 min), β is the desorption constant (g mg −1 ) and α is the initial adsorption rate (mg g −1 min). The rate constants and correlation coefficients are listed in Table 5 and the plots graphed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Response surface methodology guided adsorption and recovery of free fatty acids from oil using resin

Singh

Dien

2021

Biofuels Bioprod Bioref

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The presence of free fatty acids interferes with the conversion of plant oils to biodiesel. Four strong and weak base resins were evaluated for the removal of free fatty acids (FFA) from oil. Amberlite FPA 51 showed the highest adsorption capacity of FFA. A resin concentration above 3% could enable a higher percentage FFA adsorption. The adsorption process fitted a pseudo‐first‐order kinetic model and achieved equilibrium in approximately 8 h. A full factorial design was used to optimize the resin and FFA concentrations at a fixed temperature (40 °C). A ratio of resin to fatty acid concentrations above 1.875 was sufficient for 70% adsorption and the amount adsorbed continued to increase with further added resin. A two‐step washing of resin using hexane and ethanol recovered approximately 67.55% ± 4.05% of the initially added fatty acid. The resin that was used was regenerated with 5% NaOH and re‐used for a minimum of three consecutive cycles. However, the adsorption capacity diminished to 75% of the initial cycle in cycles 2 and 3. Thus, the work presents a resin‐based process for deacidification of oil to reduce fatty acid content of oil for biodiesel production. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Variation in the physicochemical properties of AM has revealed that the composition of manure is highly dependent on animal feed [42]. AM typically has a low C/N ratio (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), high buffering capacity, and high biodegradability [43,44]. It contains a VS/TS ratio ranging between 0.65 and 0.90 [40,43].…”

Section: Types Of Organic Wastementioning

confidence: 99%

“…Therefore, these fermented streams require a solid removal step to improve the efficiency of the recovery process [14]. Various techniques have been applied for VFA recovery, including liquid-liquid extraction [15], adsorption [16,17], membrane contactors [18], membrane reactors [19,20], electrodialysis [21,22] and membrane pervaporation [13]. Among them, membrane-based recovery appears to be a more promising technology than other techniques because of its economic and environmental potential [5,7,14].…”

Section: Introductionmentioning

confidence: 99%

Volatile Fatty Acid Production from Organic Waste with the Emphasis on Membrane-Based Recovery

2021

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In recent years, interest in the biorefinery concept has emerged in the utilization of volatile fatty acids (VFAs) produced by acidogenic fermentation as precursors for various biotechnological processes. This has attracted substantial attention to VFA production from low-cost substrates such as organic waste and membrane based VFA recovery techniques to achieve cost-effective and environmentally friendly processes. However, there are few reviews which emphasize the acidogenic fermentation of organic waste into VFAs, and VFA recovery. Therefore, this article comprehensively summarizes VFA production, the factors affecting VFA production, and VFA recovery strategies using membrane-based techniques. Additionally, the outlook for future research on VFA production is discussed.

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Volatile fatty acid adsorption on anion exchange resins: kinetics and selective recovery of acetic acid

Cited by 33 publications

References 31 publications

Volatile Fatty Acid Recovery from Anaerobic Fermentate: Focusing on Adsorption and Desorption Performances

Volatile Fatty Acid Recovery from Anaerobic Fermentate: Focusing on Adsorption and Desorption Performances

Response surface methodology guided adsorption and recovery of free fatty acids from oil using resin

Volatile Fatty Acid Production from Organic Waste with the Emphasis on Membrane-Based Recovery

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