RT info:eu-repo/semantics/article
T1 Separate digestion of liquid and solid fractions of thermally pretreated secondary sludge. Assessment and global evaluation
A1 Pérez Elvira, Sara Isabel
A1 Sapkaite, Leva
A1 Fernández-Polanco Fernández de Moreda, Fernando
K1 Hidrólisis térmica
AB The fractioning into separate liquid and solid fractions obtained by centrifugation of thickened fresh and thermally pretreated (170 ºC, 50 minutes) secondary sludge showed that 30% of the particulate organic matter was released during the pretreatment, correspondingly increasing the methane production of the particulate matter by 30% (from 259 to 329 mL CH4/g VSfed). The responsible of this enhancement was the liquid fraction, as the biodegradability of the solid fraction remained constant after the pretreatment. Mass balances showed that 34% of the VS were released to the liquid fraction, generating nearly 50% of the total methane produced, with much faster kinetics compared to the solid fraction. These results support the hypothesis of a separate liquid-solid digestion of thermally pretreated sludge, which would result in decreasing the digestion volume to half while duplicating the methane productivity per kilogram of sludge fed to digestion.
SN 1678-4383
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/26388
UL http://uvadoc.uva.es/handle/10324/26388
LA eng
NO Brazilian Journal of Chemical Engineering, 2016, vol.33, n.4, p. 699 - 704
NO Producción Científica
DS UVaDOC
RD 07-ago-2024