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DatoValore
TitleExtent of intracellular storage in single and dual substrate systems under pulse feeding
AbstractThe study investigated the effect of acetate/starch mixture on the formation of storage biopolymers as compared with the storage mechanism in systems fed with these compounds as single substrates. Experiments involved two sequencing batch reactor sets operated at steady state, at sludge ages of 8 and 2 days, respectively. Each set included three different runs, one fed with acetate, the other with starch and the last one with the acetate/starch mixture. In single substrate systems with pulse feeding, starch was fully converted to glycogen, whereas 25 % of acetate was utilized for direct microbial growth at sludge age of 8 days, together with polyhydroxybutyric acid (PHB) storage. The lower sludge age slightly increased this fraction to 30 %. Feeding of acetate/starch mixture induced a significant increase in acetate utilization for direct microbial growth; acetate fraction converted to PHB dropped down to 58 and 50 % at sludge ages of 8 and 2 days respectively, while starch remained fully converted to glycogen for both operating conditions. Parallel microbiological analyses based on FISH methodology confirmed that the biomass acclimated to the substrate mixture sustained microbial fractions capable of performing both glycogen and PHB storage.
SourceEnvironmental science and pollution research international 20 (3), pp. 1225–1238
KeywordsAcetateStarchStorageWastewater treatmentFilamentous growthGlycogenPolyhydroxybutyric acid (PHB)
JournalEnvironmental science and pollution research international
EditorSpringer, Berlin, Germania
Year2013
TypeArticolo in rivista
DOI10.1007/s11356-012-1291-4
AuthorsCiggin, Asli S.; Rossetti, Simona; Majone, Mauro; Orhon, Derin
Text379105 2013 10.1007/s11356 012 1291 4 ISI Web of Science WOS 000315442500003 Acetate Starch Storage Wastewater treatment Filamentous growth Glycogen Polyhydroxybutyric acid PHB Extent of intracellular storage in single and dual substrate systems under pulse feeding Ciggin, Asli S.; Rossetti, Simona; Majone, Mauro; Orhon, Derin Istanbul Tech Univ; Inst Ric Acque CNR; Univ Roma La Sapienza; Turkish Acad Sci The study investigated the effect of acetate/starch mixture on the formation of storage biopolymers as compared with the storage mechanism in systems fed with these compounds as single substrates. Experiments involved two sequencing batch reactor sets operated at steady state, at sludge ages of 8 and 2 days, respectively. Each set included three different runs, one fed with acetate, the other with starch and the last one with the acetate/starch mixture. In single substrate systems with pulse feeding, starch was fully converted to glycogen, whereas 25 % of acetate was utilized for direct microbial growth at sludge age of 8 days, together with polyhydroxybutyric acid PHB storage. The lower sludge age slightly increased this fraction to 30 %. Feeding of acetate/starch mixture induced a significant increase in acetate utilization for direct microbial growth; acetate fraction converted to PHB dropped down to 58 and 50 % at sludge ages of 8 and 2 days respectively, while starch remained fully converted to glycogen for both operating conditions. Parallel microbiological analyses based on FISH methodology confirmed that the biomass acclimated to the substrate mixture sustained microbial fractions capable of performing both glycogen and PHB storage. 20 Published version Articolo in rivista Springer 0944 1344 Environmental science and pollution research international Environmental science and pollution research international Environ. sci. pollut. res. int. Environmental science and pollution research international. Environmental science and pollution research international Print Environmental science and pollution research Print ESPR Print simona.rossetti ROSSETTI SIMONA