RT info:eu-repo/semantics/article
T1 Influence of the operating conditions of the intermediate thermal hydrolysis on the energetic efficiency of the sludge treatment process
A1 Díaz Villalobos, Israel
A1 Díaz Curbelo, Alina
A1 Matute Feria, Kevin Ignacio
A1 Fernández-Polanco Íñiguez de la Torre, María
A1 Pérez Elvira, Sara Isabel
K1 High solids digestion
K1 Intermediate thermal hydrolysis
K1 Sludge treatment
K1 Techno-economic analysis
K1 Wastewater treatment plant
K1 3308.10 Tecnología de Aguas Residuales
K1 3322.02 Generación de Energía
AB The application of steam explosion between two stages of anaerobic digestion may improve energy recovery from sludge while increasing organic matter removal. The influence of the operating conditions of the thermal process: temperature (130–210 °C), retention time (5–45 min) and TS concentration (5.4–10.8%), on the efficiency of VS removal, the biochemical methane potential of hydrolysed sludge and the kinetic constant of the degradation were evaluated using a Taguchi design. Increasing temperature and time increased the removal of VS and the potential of methane production but the kinetic constant was higher at lower temperatures. An optimal operating scheme was found at 170 °C (6 barg), 25 min at the greatest TS concentration in the feeding. Under such conditions, the thermal energy obtained from biogas combustion in a CHP covered the requirements for vapour generation and a profit of 3.54 € m−3 of sludge was estimated.
PB Elsevier
SN 0960-8524
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/73878
UL https://uvadoc.uva.es/handle/10324/73878
LA eng
NO Bioresource Technology, agosto 2021, vol. 333, 125114
NO Producción Científica
DS UVaDOC
RD 22-ene-2025