RT journal article
T1 Start-up of the mesophilic anaerobic co-digestion of two-phase olive-mill waste and cattle manure using volatile fatty acids as process control parameter
A1 Rubio, Jose Angel
A1 Fernández Güelfo, Luis Alberto
A1 Romero García, Luis Isidoro
A1 Wilkie, Ann C.
A1 García Morales, José Luis
A2 Ingeniería Química y Tecnología de Alimentos
A2 Tecnologías del Medio Ambiente
K1 Anaerobic co-digestion
K1 Start-up procedure
K1 Two-phase olive-mill waste
K1 Cattle manure
K1 Propionic acid
K1 Mesophilic temperature
AB In this work, the start-up and stabilization stages of mesophilic anaerobic co-digestion of 2POMW and CM in asemi-continuously fed stirred tank reactor (SSTR) were analyzed. Volatile fatty acids (VFAs) were monitored andused as the main control parameter for the start-up and stabilization stages, as well as to evaluate the potentialinhibition episodes. The results showed that accumulation of propionic acid was the key factor in the inhibitionof the methanogenic phase, leading to process imbalance. To avoid the problems associated with inhibition byhigh VFA concentrations, several reinoculations were performed using a suitable inoculum adapted to VFAdegradation. The start-up phase was carried out in batch conditions for 97 days, reaching a final concentration ofpropionic acid of 12.77 mg/L. From that moment, the reactor was fed in a semi-continuous mode with a hydraulicretention time (HRT) of 40 days. A total period of 140 days was required to achieve a stable performanceof the reactor with a methane productivity of 0.34 LCH4/LRd.
PB ELSEVIER
SN 0016-2361
YR 2022
FD 2022-10
LK http://hdl.handle.net/10498/27078
UL http://hdl.handle.net/10498/27078
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026