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Dark fermentation of sweet sorghum stalks, cheese whey and cow manure mixture: effect of pH, pretreatment and organic load

Dareioti Margarita A., Vavouraki Aikaterini, Tsigkou Konstantina, Zafiri Constantina, Kornaros Michael

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URIhttp://purl.tuc.gr/dl/dias/051E5AA3-FCB7-4864-B687-9ADE0C226945-
Identifierhttps://doi.org/10.3390/pr9061017-
Identifierhttps://www.mdpi.com/2227-9717/9/6/1017/htm-
Languageen-
Extent16 pagesen
TitleDark fermentation of sweet sorghum stalks, cheese whey and cow manure mixture: effect of pH, pretreatment and organic loaden
CreatorDareioti Margarita A.en
CreatorVavouraki Aikaterinien
CreatorΒαβουρακη Αικατερινηel
CreatorTsigkou Konstantinaen
CreatorZafiri Constantinaen
CreatorKornaros Michaelen
PublisherMDPIen
Content SummaryThe aim of this study was to determine the optimal conditions for dark fermentation using agro-industrial liquid wastewaters mixed with sweet sorghum stalks (i.e., 55% sorghum, 40% cheese whey, and 5% liquid cow manure). Batch experiments were performed to investigate the effect of controlled pH (5.0, 5.5, 6.0, 6.5) on the production of bio-hydrogen and volatile fatty acids. According to the obtained results, the maximum hydrogen yield of 0.52 mol H2/mol eq. glucose was measured at pH 5.5 accompanied by the highest volatile fatty acids production, whereas similar hydrogen productivity was also observed at pH 6.0 and 6.5. The use of heat-treated anaerobic sludge as inoculum had a positive impact on bio-hydrogen production, exhibiting an increased yield of 1.09 mol H2/mol eq. glucose. On the other hand, the pretreated (ensiled) sorghum, instead of a fresh one, led to a lower hydrogen production, while the organic load decrease did not affect the process performance. In all experiments, the main fermentation end-products were volatile fatty acids (i.e., acetic, propionic, butyric), ethanol and lactic acid. en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2022-11-18-
Date of Publication2021-
SubjectAgro-industrial wastesen
SubjectDark fermentationen
SubjectCheese wheyen
SubjectEnsiled sweet sorghumen
SubjectCow manureen
SubjectpH effecten
SubjectOrganic load effecten
SubjectPretreatment effecten
Bibliographic CitationM. A. Dareioti, A. I. Vavouraki, K. Tsigkou, C. Zafiri, and M. Kornaros, “Dark fermentation of sweet sorghum stalks, cheese whey and cow manure mixture: effect of pH, pretreatment and organic load,” Processes, vol. 9, no. 6, June 2021, doi: 10.3390/pr9061017.en

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