RT journal article
T1 Successful and stable operation of anaerobic thermophilic co-digestion of sun-dried sugar beet pulp and cow manure under short hydraulic retention time.
A1 Gómez Quiroga, Xiomara
A1 Aboudi, Kaoutar
A1 Álvarez Gallego, Carlos José
A1 Romero García, Luis Isidoro
A2 Ingeniería Química y Tecnología de Alimentos
K1 Sun dried sugar beet pulp
K1 Cow manure
K1 Anaerobic co-digestion
K1 Thermophilic
K1 Semi-continuous reactors
AB This work consists of a long-term (621 days) experimental study about biogas production from sun dried sugar beet pulp and cow manure. Thermophilic (55°C) anaerobic co-digestion was performed in semi-continuous reactors, testing ten hydraulic retention times (30-3 days) (HRTs) and organic loading rates (2-24 gVS/Lreactor∙d) (OLRs). Results showed that the best global system performance (regarding stability, biogas production, and organic matter removal) was achieved at an HRT as short as 5 days (OLR of 12.47 gVS/Lreactor∙d) with a biogas yield of 315 mL/gVSadded. The gradual OLR increase allowed system control and time-appropriate intervention, avoiding irreversible process disturbances and maintaining admissible acidity/alkalinity ratios (<0.8) for HRTs ranging from 30 to 4 days. The accumulation of acetic acid was the main cause of the process disturbance observed at short HRTs. It was deduced that for the HRT of 3 days, the methane productivity was mainly owing to the hydrogen-utilizing methanogens pathway. This research clearly shows how an adequate combination of agro-industrial wastes and livestock manure could be processed by anaerobic co-digestion in short HRTs with great efficiency and stability and deepens in the understanding of the start-up, stability and optimization of the co-digestion.
PB PERGAMON-ELSEVIER SCIENCE LTD
SN 1879-1298
YR 2022
FD 2022-01
LK http://hdl.handle.net/10498/26163
UL http://hdl.handle.net/10498/26163
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026