Co-digestion of Cheese Whey With Sewage Sludge for Caproic Acid Production: Role of Microbiome and Polyhydroxyalkanoates Potential Production
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http://hdl.handle.net/2183/28489
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Co-digestion of Cheese Whey With Sewage Sludge for Caproic Acid Production: Role of Microbiome and Polyhydroxyalkanoates Potential ProductionAutor(es)
Fecha
2021-06-08Cita bibliográfica
Iglesias-Iglesias, R., Portela-Grandío, A., Treu, L., Campanaro, S., Kennes, C., Veiga, M.C., 2021. Co-digestion of cheese whey with sewage sludge for caproic acid production: Role of microbiome and polyhydroxyalkanoates potential production. Bioresour. Technol. 337, 125388. doi:10.1016/j.biortech.2021.125388
Resumen
[Abstract] The main aim of this work was to evaluate the efficiency of producing caproic acid and other volatile fatty acids using a co-digestion between cheese whey and sewage sludge in a continuous reactor. The effect of two different feeding regimes (one and two per day) and three hydraulic retention times (HRT) (15, 10 and 6 days) on the organic acids production were studied. The optimal conditions for the process were 10 days HRT, 2 feeding cycles per day, reaching a maximum degree of acidification of 44%. Under these conditions, the most abundant organic acid was caproic acid. The analysis of the microbial community dynamics in the reactor during the HRT changes revealed a microbiome enriched in organisms involved in caproic acid production. Additionally, the production of polyhydroxyalkanoates using the organic acids stream as feeding was verified in a fed-batch experiment obtaining a copolymer formed by hydroxybutyrate, hydroxyvalerate and hydroxyhexanoate.
Palabras clave
Caproic acid
Cheese whey
Sewage sludge
Microbiome
Organic acids
Polyhydroxyalkanoates
Cheese whey
Sewage sludge
Microbiome
Organic acids
Polyhydroxyalkanoates
Descripción
Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG
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Derechos
Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)
ISSN
0960-8524