RT journal article
T1 Enhancement of methane production in thermophilic anaerobic co-digestion of exhausted sugar beet pulp and pig manure
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 pig manure
K1 exhausted sugar beet pulp
K1 anaerobic co-digestion
K1 thermophilic
K1 lignocellulosic waste
AB In this paper, the viability of thermophilic anaerobic co-digestion of exhausted sugar beet pulp (ESBP) and pig manure (PM) was evaluated. The effect of the proportion of ESBP on biogas production was investigated by using a series of lab-scale batch assays, in duplicates. The following five ESBP:PM mixture ratios were studied: 0:100, 10:90, 25:75, 50:50, and 100:0. The highest cumulative methane production (212.4 mL CH4/g VSadded) was reached for the mixture 25:75. The experimental results showed that the increase in the proportion of ESBP in the mixture led to the distortion of the process, due to acidification by the volatile fatty acids generated. Acetic acid was the predominant acid in all the cases, representing more than 78% of the total acidity. Moreover, the results obtained by operating at thermophilic temperatures have been compared with those obtained in a previous study conducted at mesophilic temperatures. The results have shown that in the individual digestion of ESBP, the activity of acetoclastic methanogens was affected in both temperatures, but especially in thermophilic conditions. Thus, the methane produced in the individual thermophilic digestion of ESBP came almost entirely from the activity of hydrogen-utilizing methanogenic archaea.
SN 2076-3417
YR 2019
FD 2019-04-29
LK http://hdl.handle.net/10498/29610
UL http://hdl.handle.net/10498/29610
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026