2018
DOI: 10.1002/elsc.201700176
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Anaerobic co‐digestion of waste yeast biomass from citric acid production and waste frying fat

Abstract: The application of spent yeast for biogas production has been studied only in the context of breweries so far. This study is focused on the anaerobic digestion of concentrated yeast biomass (CYB), being a by-product of citric acid biosynthesis. Two experimental set-ups were used in order to test CYB as a mono-substrate and co-substrate for closing the loop in accordance with the 'bioeconomy' approach. The results show that CYB allows for obtaining a high biogas yield, with a maximum of 1.45 m 3 N /kg VS produc… Show more

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Cited by 5 publications
(3 citation statements)
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References 25 publications
(45 reference statements)
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“…Analogously, both approaches may lead to the production of a huge amount of spent cell biomass after the oil extraction, similar to the yeast extract produced from spent brewer's yeast (Tanguler & Erten, 2008) and spent baker's yeast (Vukašinović-Milić et al, 2007). This spent biomasscould suit for nitrogen recovery in the fermentation process or forbiomethane production by anaerobic digestion (Moeller et al, 2018;Sosa-Hernández et al, 2016). Moreover, process 2 could also provide furfural, which represents one of the most promising platform chemicals directlyderived from biomass (Wang et al, 2019).…”
Section: Mass Balance Of the Processesmentioning
confidence: 99%
“…Analogously, both approaches may lead to the production of a huge amount of spent cell biomass after the oil extraction, similar to the yeast extract produced from spent brewer's yeast (Tanguler & Erten, 2008) and spent baker's yeast (Vukašinović-Milić et al, 2007). This spent biomasscould suit for nitrogen recovery in the fermentation process or forbiomethane production by anaerobic digestion (Moeller et al, 2018;Sosa-Hernández et al, 2016). Moreover, process 2 could also provide furfural, which represents one of the most promising platform chemicals directlyderived from biomass (Wang et al, 2019).…”
Section: Mass Balance Of the Processesmentioning
confidence: 99%
“…A review by Show et al [282] summarized the types of organic wastes that can be used in citric acid fermentation. During the downstream process, the spent medium can be incorporated into a biorefinery framework and be used in the synthesis of other valuable bioproducts such as biomethane [285] and biohydrogen [286,287]. Alternatively, the effluents from other bioprocesses can be used in citric acid production [288].…”
Section: Citric Acidmentioning
confidence: 99%
“…Hashmi et al evidenced that red yeast and fungal strains have demonstrated the potential of COD removal, along with the production of other valuable commodities, e.g., carotenoids, which supplement and decrease fuel production costs. This strategy was also investigated by Moeller et al [106] to produce citric acid as a by-product along with AD, which led to a maximum biogas production of 1.45 m 3 N/kgVS (methane concentration 66 ± 4%) [106]. To prevent over-acidification, tube clogging was performed, and operation took place at a high organic loading rate; concentrated yeast biomass was co-digested with waste frying fat (1:20).…”
Section: Yeast Biomass As Feed and Biocatalystsmentioning
confidence: 99%