TY - JOUR
T1 - Enhancing methane yield of chicken litter in anaerobic digestion using magnetite nanoparticles
AU - Aguilar-Moreno, Guadalupe Stefanny
AU - Navarro-Cerón, Elizabeth
AU - Velázquez-Hernández, Azucena
AU - Hernández-Eugenio, Guadalupe
AU - Aguilar-Méndez, Miguel Ángel
AU - Espinosa-Solares, Teodoro
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/3
Y1 - 2020/3
N2 - Methane production of chicken litter in anaerobic digestion (AD) was evaluated with different concentrations of magnetite (Fe3O4) nanoparticles (NPs). The Fe3O4 NPs were synthesized by co-precipitation, where the effect of different concentrations and dissolution temperatures of the passivant and precursors, as well as the sonication time, on NPs size was determined. The best NPs were selected based on the smallest hydrodynamic diameter (79.37 nm) with the highest absolute value of zeta potential (−18.06 mV). These NPs were analyzed in a transmission electron microscope (average size of 4.2 nm) and by X-ray diffraction (to corroborate their structure). These 4.2 nm NPs were used to evaluate their effect on AD of chicken litter under mesophilic conditions. The treatments for AD were the control (only chicken litter) and the addition of different concentrations of Fe3O4 NPs (20, 40 and 60 mg L−1). The treatment with 20 mg L−1 of NPs had the highest methane production rate (2.55 mL CH4∙gvsf−1∙d−1) and the highest cumulative methane yield (137.23 mL CH4∙gvsf−1), the last one with an increase of 73.9% compared to the control, while the concentration of volatile fatty acids was similar in all treatments. In general, NPs had a biostimulating effect on methanogenic activity.
AB - Methane production of chicken litter in anaerobic digestion (AD) was evaluated with different concentrations of magnetite (Fe3O4) nanoparticles (NPs). The Fe3O4 NPs were synthesized by co-precipitation, where the effect of different concentrations and dissolution temperatures of the passivant and precursors, as well as the sonication time, on NPs size was determined. The best NPs were selected based on the smallest hydrodynamic diameter (79.37 nm) with the highest absolute value of zeta potential (−18.06 mV). These NPs were analyzed in a transmission electron microscope (average size of 4.2 nm) and by X-ray diffraction (to corroborate their structure). These 4.2 nm NPs were used to evaluate their effect on AD of chicken litter under mesophilic conditions. The treatments for AD were the control (only chicken litter) and the addition of different concentrations of Fe3O4 NPs (20, 40 and 60 mg L−1). The treatment with 20 mg L−1 of NPs had the highest methane production rate (2.55 mL CH4∙gvsf−1∙d−1) and the highest cumulative methane yield (137.23 mL CH4∙gvsf−1), the last one with an increase of 73.9% compared to the control, while the concentration of volatile fatty acids was similar in all treatments. In general, NPs had a biostimulating effect on methanogenic activity.
KW - Biochemical methane potential
KW - Co-precipitation
KW - FeO
KW - Gompertz model
KW - Methane production enhancement
UR - http://www.scopus.com/inward/record.url?scp=85071646557&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2019.08.111
DO - 10.1016/j.renene.2019.08.111
M3 - Artículo
AN - SCOPUS:85071646557
SN - 0960-1481
VL - 147
SP - 204
EP - 213
JO - Renewable Energy
JF - Renewable Energy
ER -