Extraction of Volatile Fatty Acids from Leachate via Liquidliquid Extraction and Adsorption Method

Razali, Yasmin Syafikah; Tajarudin, Husnul Azan; Daud, Zawawi

doi:10.30880/ijie.2018.10.09.029

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…The number of activated sites responsible for the adsorption phenomenon depends on the particle sizes, porosity, and mainly superficial area. The higher the surface, the higher the number of activated sites installed on it. , Lewatit had resin with the highest surface area of 50 cm 2 /g, while PAC had the lowest surface area (0.12 cm 2 /g). The porosity of the particles is also important, as the void degree is directly correlated to the surficial area .…”

Section: Resultsmentioning

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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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: Resultsmentioning

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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“…The advantages and disadvantages of existing technologies to separate and purify SCFAs have recently been reviewed and discussed [ 54 ]. The main techniques that have been considered for SCFAs recovery from fermentation broths in recent years are as follows: liquid − liquid extraction using organic solvents [ 55 ], membrane separation [ 56 , 57 ]; adsorption [ 53 , 58 – 60 ]; distillation [ 61 ]; electrodialysis [ 62 , 63 ] …”

Section: Extraction/purification Of Scfasmentioning

confidence: 99%

Production of short-chain fatty acids (SCFAs) as chemicals or substrates for microbes to obtain biochemicals

Tomás-Pejó,

González-Fernández,

Greses

et al. 2023

Biotechnol Biofuels

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Carboxylic acids have become interesting platform molecules in the last years due to their versatility to act as carbon sources for different microorganisms or as precursors for the chemical industry. Among carboxylic acids, short-chain fatty acids (SCFAs) such as acetic, propionic, butyric, valeric, and caproic acids can be biotechnologically produced in an anaerobic fermentation process from lignocellulose or other organic wastes of agricultural, industrial, or municipal origin. The biosynthesis of SCFAs is advantageous compared to chemical synthesis, since the latter relies on fossil-derived raw materials, expensive and toxic catalysts and harsh process conditions. This review article gives an overview on biosynthesis of SCFAs from complex waste products. Different applications of SCFAs are explored and how these acids can be considered as a source of bioproducts, aiming at the development of a circular economy. The use of SCFAs as platform molecules requires adequate concentration and separation processes that are also addressed in this review. Various microorganisms such as bacteria or oleaginous yeasts can efficiently use SCFA mixtures derived from anaerobic fermentation, an attribute that can be exploited in microbial electrolytic cells or to produce biopolymers such as microbial oils or polyhydroxyalkanoates. Promising technologies for the microbial conversion of SCFAs into bioproducts are outlined with recent examples, highlighting SCFAs as interesting platform molecules for the development of future bioeconomy.

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“…99 Another study demonstrated 87.4% acetic acid and 94.1% butyric acid recovery from leachate using activated carbon adsorption, whereas liquid−liquid extraction using petroleum ether extracted only 28.1% of acetic acid and 88.8% butyric acid. 100 Acetic acid and butyric acid are two widely used VFAs in the industry. 99 Acetic acid costs $400−800 ton −1 , whereas propionic acid costs $1000−2300 ton −1 , and butyric acids cost about $1800−1900 ton −1 .…”

Section: Paradigm Shift In Landfill Leachate Treatment: Resource Reco...mentioning

confidence: 99%

“…The application of an adsorption–desorption process using activated carbon recovered 89.1% of acetic acid with water desorption and 67.8% of butyric acid with ethanol desorption . Another study demonstrated 87.4% acetic acid and 94.1% butyric acid recovery from leachate using activated carbon adsorption, whereas liquid–liquid extraction using petroleum ether extracted only 28.1% of acetic acid and 88.8% butyric acid . Acetic acid and butyric acid are two widely used VFAs in the industry .…”

Section: Paradigm Shift In Landfill Leachate Treatment: Resource Reco...mentioning

confidence: 99%

Advancement and Challenges in Municipal Landfill Leachate Treatment–The Path Forward!

et al. 2022

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Although landfill leachate is a small volumetric fraction compared to municipal wastewater, its complexity raises concerns for researchers and practitioners. Emerging and novel treatment technologies are being investigated to address landfill leachate treatment challenges. In the past decade, leachate research shifted from the removal of contaminants to the simultaneous recovery of resources and removal of contaminants. While resource recovery is appealing, it is also questionable due to the economic feasibility and post-environmental impact of applied resources. Various emerging contaminants may remain in recovered resources, making recovery a less preferred option. Because of the ineffectiveness of biological treatment of emerging contaminants, such as per- and polyfluoroalkyl substances, leachate cotreatment has been restricted in some wastewater treatment plants. Thus, in the wake of emerging contaminants and stringent regulations, it seems wiser to develop effective, integrated leachate treatments in lieu of widely practiced biological cotreatment. The solid waste industry needs viable, cost-efficient, and readily executable technologies to effectively handle the upcoming need. Thus, in this paper, academic and industry experts discuss the progress, challenges, and future of leachate treatment. This paper provides a forward-thinking evaluation of the past decade’s advancements and challenges in the field of landfill leachate treatment.

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Extraction of Volatile Fatty Acids from Leachate via Liquidliquid Extraction and Adsorption Method

Cited by 12 publications

References 8 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

Production of short-chain fatty acids (SCFAs) as chemicals or substrates for microbes to obtain biochemicals

Advancement and Challenges in Municipal Landfill Leachate Treatment–The Path Forward!

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