LAPSE:2023.20636
Published Article
LAPSE:2023.20636
Liquid−Liquid Extraction of Volatile Fatty Acids from Anaerobic Acidification Broth Using Ionic Liquids and Cosolvent
March 20, 2023
Abstract
Promoting efficiency of liquid−liquid extraction at a high pH is a main challenge for the recovery of volatile fatty acids (VFAs) from organic wastes. In this study, the extraction efficiency of VFAs from artificial solution and acidification fermentation broth of kitchen wastes using ionic liquids (ILs) was assessed at high pH. The effect of ILs addition ratio in diluent, volumetric solvent to feed ratio (S/F) on extraction efficiency were investigated. The solvent consists of [P666,14][Cl] (IL101) and dodecane was found to be the promising solvent for VFA extraction at pH 6.0, especially for butyric acid. The IL-101 ratio in dodecane and S/F was significant factors for the liquid−liquid extraction of VFAs. In general, a higher IL-101 ratio and S/F can promote the extraction efficiency of single VFAs. As a result, the maximum extraction rate of acetic acid (38.4−49.9%) and butyric acid (66.0−92.1%) from different VFA concentration solutions was observed at 10% IL-101 in dodecane and S/F = 2/1. The solvent was also effective in different types of real fermentation broth of kitchen wastes. The maximum extraction rate and selectivity of butyric acid was 60.2%/70.5% in butyric acid type broth and 74.6%/62.7% in mixture acid type broth.
Promoting efficiency of liquid−liquid extraction at a high pH is a main challenge for the recovery of volatile fatty acids (VFAs) from organic wastes. In this study, the extraction efficiency of VFAs from artificial solution and acidification fermentation broth of kitchen wastes using ionic liquids (ILs) was assessed at high pH. The effect of ILs addition ratio in diluent, volumetric solvent to feed ratio (S/F) on extraction efficiency were investigated. The solvent consists of [P666,14][Cl] (IL101) and dodecane was found to be the promising solvent for VFA extraction at pH 6.0, especially for butyric acid. The IL-101 ratio in dodecane and S/F was significant factors for the liquid−liquid extraction of VFAs. In general, a higher IL-101 ratio and S/F can promote the extraction efficiency of single VFAs. As a result, the maximum extraction rate of acetic acid (38.4−49.9%) and butyric acid (66.0−92.1%) from different VFA concentration solutions was observed at 10% IL-101 in dodecane and S/F = 2/1. The solvent was also effective in different types of real fermentation broth of kitchen wastes. The maximum extraction rate and selectivity of butyric acid was 60.2%/70.5% in butyric acid type broth and 74.6%/62.7% in mixture acid type broth.
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Keywords
anaerobic fermentation, ionic liquids, kitchen wastes, liquid–liquid extraction, volatile fatty acid
Subject
Suggested Citation
Xing T, Yu S, Tang J, Liu H, Zhen F, Sun Y, Kong X. Liquid−Liquid Extraction of Volatile Fatty Acids from Anaerobic Acidification Broth Using Ionic Liquids and Cosolvent. (2023). LAPSE:2023.20636
Author Affiliations
Xing T: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Yu S: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Tang J: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Liu H: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, B
Zhen F: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China [ORCID]
Sun Y: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Kong X: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Yu S: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Tang J: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Liu H: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, B
Zhen F: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China [ORCID]
Sun Y: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Kong X: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Journal Name
Energies
Volume
16
Issue
2
First Page
785
Year
2023
Publication Date
2023-01-10
ISSN
1996-1073
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PII: en16020785, Publication Type: Journal Article
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LAPSE:2023.20636
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https://doi.org/10.3390/en16020785
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Mar 20, 2023
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