K. Aboudi, X. Gómez-Quiroga, C. J. Álvarez-Gallego, J. M. Quiroga-Alonso, and L. I. Romero-García
Abstract—This work analyzes the effect of temperature on
the anaerobic digestion of sugar beet by-products for both
biohydrogen and biomethane production. The findings
demonstrate that the anaerobic process was significantly
affected by the increase in temperature from mesophilic to
thermophilic or hyper-thermophilic conditions. Therefore, it
was found that the mesophilic temperature was more suitable
for the anaerobic digestion of sugar beet by-products, using
either the raw feedstock or the pretreated feedstock at higher
temperatures. The specific production of biohydrogen from
thermophilic acidogenic digester was 1.7 fold higher than that
obtained from the hyper-thermophilic one. Moreover, when
raw feedstock was used in single stage digesters, a methane
production rate of 0.55 LCH4/Lr*d was obtained from the
mesophilic digester, which was 45% higher than that of the
thermophilic one. It has been observed that the increase in
temperature led to a high accumulation of volatile and long
chain fatty acids, inhibiting and slowing down the anaerobic
process.
Index Terms—Anaerobic digestion, inhibition, sugar beet
by-products, temperature.
K. Aboudi, C. J. Álvarez-Gallego, and L. I. Romero-García are with the
Department of Chemical Engineering and Food Technology, Faculty of
Sciences, Campus de Puerto Real, University of Cádiz, Spain (e-mail:
kaoutar.aboudi@uca.es, carlosjose.alvarez@uca.es,
luisisidoro.romero@uca.es).
X. Gómez-Quiroga was with Department of Chemical Engineering and
Food Technology, Faculty of Sciences, Campus de Puerto Real, University
of Cádiz, Spain (e-mail: xiomara.gomez@uca.es).
J. M. Quiroga-Alonso is with the Department of Environmental
Technology, Faculty of Marine and Environmental Sciences, Campus de
Puerto Real. University of Cádiz, Spain (e-mail: josemaria.quiroga@uca.es).
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Cite: K. Aboudi, X. Gómez-Quiroga, C. J. Álvarez-Gallego, J. M. Quiroga-Alonso, and L. I. Romero-García, "Effect of Temperature on Biohydrogen and Biomethane Productions by Anaerobic Digestion of Sugar Beet by-Products," International Journal of Environmental Science and Development vol. 8, no. 11, pp. 762-766, 2017.