Valorization of agro-industrial wastes to produce volatile fatty acids: combined effect of substrate/inoculum ratio and initial alkalinity

Iglesias-Iglesias, Ruth; Fernandez-Feal, María Mercedes del Coro; Kennes, Christian; Veiga, María C.

doi:10.1080/09593330.2020.1743370

Cited by 18 publications

(4 citation statements)

References 35 publications

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“…For instance, Magdalena et al (2019) [ 44 ] showed that 50% of SCFAs profile was dominated by these carboxylic acids when microalgae biomass was subjected to AF, while Llamas et al (2021) [ 36 ] found that the same microalgae biomass resulted in a 60–65% of acetic and propionic acids dominance. Likewise, Iglesias-Iglesias et al (2019) [ 42 ] showed that the presence of these SCFAs increased to 70–80% when sewage sludge was used as substrate. Although an SCFA mixture was produced in each study, acetic acid and propionic acid prevailed over other SCFAs, being further followed by butyric and valeric acids.…”

Section: Bioreactor Conditions Favouring Af and Scfa Productionmentioning

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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Section: Bioreactor Conditions Favouring Af and Scfa Productionmentioning

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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“…In Nigeria, potato peels (PP) are some of the wastes that are readily available and are usually a source of environmental pollution. Available studies on the fermentation of PP has produced mainly short chain fatty acids, SCFAs (Iglesias-Iglesias et al, 2021;Lu et al, 2020), probably because the substrate has limited EDs and EAs required for CE. The concentration of these EDs and EAs can be improved by ensiling.…”

Section: Introductionmentioning

confidence: 99%

Production of medium chain fatty acids from ensiled potato peels; effect of inoculum type and kinetic study

Undiandeye,

Kiman,

Anaele

2023

Nig. J. Technol. Dev.

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Medium chain fatty acids (MCFAs) are fatty acids containing 6 to 12 carbon atoms with a wide range of industrial application. They can be produced by the fermentation of waste biomass through a process called chain elongation (CE). During CE, the type of inoculum used plays a key role in determining the optimal yield of MCFAs. In this study, we showed, for the first time, the use of three different inocula including leachate, rumen fluid and digestate from a biogas reactor for the batch fermentation of ensiled potato peels for MCFAs production. Results showed that the highest chain elongation was obtained when leachate was used as inoculum with a maximum yield of 57, 4 and 26 g/kgVS for caproic acid, heptanoic acid and caprylic acid respectively. A kinetic study shows that the production of MCFAs from ensiled potato peels was better described by the first-order model than by the modified Gompertz model.

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“…Conforme citado anteriormente, grande parte dos trabalhos focam na metanogênese e produção de CH4, porém a acidogênese também apresenta produtos interessantes como bioH2, AO e solventes. Embora o metano seja geralmente considerado o produto final de interesse para a DA, atualmente, os AO, solventes e hidrogênio gerados durante a etapa acidogênica têm ganhado atenção devido ao seu possível uso em muitas indústrias e aplicação como precursores para biocombustíveis, bioplásticos e outros ácidos de cadeia mais longa (BEVILACQUA et al, 2020;IGLESIAS-IGLESIAS et al, 2020;KLEEREBEZEM et al, 2015). Os preços de mercado indicam maior lucratividade dos AO em comparação ao metano ou biogás (MOSCOVIZ et al, 2018) Embora a fermentação escura atraia uma atenção notável, ela pode levar a um rendimento moderado de H2, o que é um grande problema encontrado.…”

Section: Tratamento Anaeróbio De Duplo Estágiounclassified

“…Mais atenção tem sido dada à valorização dos resíduos orgânicos na produção de ácidos orgânicos e solventes (BEVILACQUA et al, 2020;IGLESIAS-IGLESIAS et al, 2020). No entanto, o potencial de desenvolvimento industrial desses bioprocessos ainda é severamente limitado, principalmente devido à falta de seletividade do produto.…”

Section: And Agriculture Organization Of the United Nations -Fao 2021)unclassified

Avaliação da produção de biohidrogênio e ácidos orgânicos em reatores acidogênicos a partir de soro de queijo e vinhaça de cana-de-açúcar sem ajuste de pH e de água residuária rica em proteínas gerada em indústria de processamento de atum

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Valorization of agro-industrial wastes to produce volatile fatty acids: combined effect of substrate/inoculum ratio and initial alkalinity

Cited by 18 publications

References 35 publications

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

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

Production of medium chain fatty acids from ensiled potato peels; effect of inoculum type and kinetic study

Avaliação da produção de biohidrogênio e ácidos orgânicos em reatores acidogênicos a partir de soro de queijo e vinhaça de cana-de-açúcar sem ajuste de pH e de água residuária rica em proteínas gerada em indústria de processamento de atum

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