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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/SWMR/02
The role of static-magnetic-field, and fly-ash accelerant in bioenergy production by
anaerobic co-digestion

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Yasir Abbas , Sining Yun *, Kaijun Wang , Fayyaz Ali Shah , Tian Xing , Bingjie Li
1 Functional Materials Laboratory (FML), School of Materials Science and Engineering,
Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, China
2 Department of Environmental Sciences. Hazara University Mansehra, KPK, Pakistan
Correspondence: kuyasirabbas@gmail.com
Abstract
The anaerobic-co-digestion (AcoD) of dairy-manure (DM) and aloe-peel-residue (ALR) waste
is enhanced by combining static-magnetic-field (SMF) and fly-ash (FA). Varying SMF
intensities (5–30 mT) were applied to the co-digestion digesters containing the optimum FA
concentration (1.5 wt.%), which were selected from co-digestion systems with a varying FA
(0–2 wt.%). All experimental groups exhibit the greater COD removal rates (51.56–64.19%)
and cumulative biogas yields (604.14–671.64 mL/g VS) than reference group (37.77% and
433.19 mL/g VS). The digester with optimum FA concentration (1.5 wt.%) under 5 mT shows
the highest biogas yield (671.64 mL/g VS), and exhibits superior digestate stability (45.4%)
and fertility (7.01%) for fertilizer utilization. A powerful strategy for understanding the
underlying mechanism of the SMF and FA accelerant in an enhanced AcoD system is proposed.
This work documents an innovative technique for an enhanced AcoD system using the SMF
coupled with FA accelerant.

Keywords: anaerobic, biogas, fertilizer.

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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