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Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins

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Abstract
This investigation studies the impact of trace elements supplementation on protein anaerobic conversion into volatile fatty acids (VFAs). Two continuous reactors were operated with two model substrates, casein and gelatin, at acid (pH 5) and neutral (pH 7) conditions, with the addition of macro and micronutrients. Micronutrients increased the acidification degree of both proteins from 40% to 50% to more than 60% only at pH 7, which was consistent with a greater amino acid consumption at neutral conditions. Furthermore, trace elements modified the process selectivity, promoting valeric acids production and other variations dependant on protein composition. Isomerisation and chain elongation processes were identified as a consequence of the observed deviations between amino acid consumption and VFA production. Overall, this study demonstrated that the supplementation of micronutrients can be useful to enhance and steer the anaerobic fermentation of protein-rich streams.
Keywords
Amino acid degradation, Biorefinery, Carboxylate platform, Micronutrients, Mixed-culture fermentation, ANAEROBIC-DIGESTION, WASTE-WATER, DEGRADATION, METHANOL, ACIDOGENESIS, PERFORMANCE, HYDROLYSIS, METALS

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MLA
Bevilacqua, R., et al. “Understanding the Effect of Trace Elements Supplementation on Volatile Fatty Acids Production from Proteins.” JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, vol. 9, no. 5, 2021, doi:10.1016/j.jece.2021.105934.
APA
Bevilacqua, R., Regueira López, A., Mauricio-Iglesias, M., Lema, J. M., & Carballa, M. (2021). Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 9(5). https://doi.org/10.1016/j.jece.2021.105934
Chicago author-date
Bevilacqua, R., Alberte Regueira López, M. Mauricio-Iglesias, J. M. Lema, and M. Carballa. 2021. “Understanding the Effect of Trace Elements Supplementation on Volatile Fatty Acids Production from Proteins.” JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9 (5). https://doi.org/10.1016/j.jece.2021.105934.
Chicago author-date (all authors)
Bevilacqua, R., Alberte Regueira López, M. Mauricio-Iglesias, J. M. Lema, and M. Carballa. 2021. “Understanding the Effect of Trace Elements Supplementation on Volatile Fatty Acids Production from Proteins.” JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9 (5). doi:10.1016/j.jece.2021.105934.
Vancouver
1.
Bevilacqua R, Regueira López A, Mauricio-Iglesias M, Lema JM, Carballa M. Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING. 2021;9(5).
IEEE
[1]
R. Bevilacqua, A. Regueira López, M. Mauricio-Iglesias, J. M. Lema, and M. Carballa, “Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins,” JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, vol. 9, no. 5, 2021.
@article{8724924,
  abstract     = {{This investigation studies the impact of trace elements supplementation on protein anaerobic conversion into volatile fatty acids (VFAs). Two continuous reactors were operated with two model substrates, casein and gelatin, at acid (pH 5) and neutral (pH 7) conditions, with the addition of macro and micronutrients. Micronutrients increased the acidification degree of both proteins from 40% to 50% to more than 60% only at pH 7, which was consistent with a greater amino acid consumption at neutral conditions. Furthermore, trace elements modified the process selectivity, promoting valeric acids production and other variations dependant on protein composition. Isomerisation and chain elongation processes were identified as a consequence of the observed deviations between amino acid consumption and VFA production. Overall, this study demonstrated that the supplementation of micronutrients can be useful to enhance and steer the anaerobic fermentation of protein-rich streams.}},
  articleno    = {{105934}},
  author       = {{Bevilacqua, R. and Regueira López, Alberte and Mauricio-Iglesias, M. and Lema, J. M. and Carballa, M.}},
  issn         = {{2213-3437}},
  journal      = {{JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING}},
  keywords     = {{Amino acid degradation,Biorefinery,Carboxylate platform,Micronutrients,Mixed-culture fermentation,ANAEROBIC-DIGESTION,WASTE-WATER,DEGRADATION,METHANOL,ACIDOGENESIS,PERFORMANCE,HYDROLYSIS,METALS}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{8}},
  title        = {{Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins}},
  url          = {{http://dx.doi.org/10.1016/j.jece.2021.105934}},
  volume       = {{9}},
  year         = {{2021}},
}

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