SYNERGISTIC EFFECT OF ALOE PEEL-DERIVED NITROGEN-DOPED BIO-BASED CARBON AND MAGNETIC FIELD ON METHANE PRODUCTION IN ANAEROBIC CO-DIGESTION

An Jinhang; Li Bingjie; Wang Kaijun; Ke Teng; Yun Sining

doi:10.19912/j.0254-0096.tynxb.2022-0280

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 532-540. DOI: 10.19912/j.0254-0096.tynxb.2022-0280

SYNERGISTIC EFFECT OF ALOE PEEL-DERIVED NITROGEN-DOPED BIO-BASED CARBON AND MAGNETIC FIELD ON METHANE PRODUCTION IN ANAEROBIC CO-DIGESTION

An Jinhang, Li Bingjie, Wang Kaijun, Ke Teng, Yun Sining

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Abstract

In this study, aloe peel-derived nitrogen-doped bio-based carbon （N-C） was used as an additive in an anaerobic co-digestion system to investigate the synergistic effect of N-C and a magnetic field on methane production, pH value, and the removal rates of total chemical oxygen demand （TCOD）, total solids （TS）, and volatile solids （VS）. The results show that, compared with the control group, the addition of N-C can improve the gas production peak of the digestion system and increase biogas production. Applying a magnetic field of 5 mT to the digestion system and adding N-C can further improve the performance of the co-digestion system. The synergistic effect of the N-C additive and a magnetic field results in a biogas production peak 2-3 days earlier than that of the CK group, and the cumulative biogas production increases by 48.40%-101.6%. The addition of 0.30% N-C enable the digestion system to obtain the highest biogas production （537.6 mL/g VS）, methane content （59.3%）, methane production （318.8 mL/g VS）, and removal rate of TCOD （79.02%）, TS （44.1%） and VS （55.7%）. This paper explains the synergistic effect of N-C as an additive and a magnetic field in enhancing methane production in anaerobic co-digestion.

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magnetic fields / anaerobic digestion / methane / biogas / aloe peel-derived nitrogen-doped bio-based carbon / surface functional groups

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An Jinhang, Li Bingjie, Wang Kaijun, Ke Teng, Yun Sining. SYNERGISTIC EFFECT OF ALOE PEEL-DERIVED NITROGEN-DOPED BIO-BASED CARBON AND MAGNETIC FIELD ON METHANE PRODUCTION IN ANAEROBIC CO-DIGESTION[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 532-540 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0280

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