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Enhanced gaseous chlorobenzene removal and its microbial mechanism through innovative modified packings coupled with magnetic field in a biotrickling filter
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D
J
C
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Y
J
陈
L
DOI：10.1007/s11783-025-2072-x.png)
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Abstract
En 中文
Effective treatment of chlorobenzene (CB)-contaminated waste air is crucial, although biological methods are often constrained by mass transfer limitations and biodegradability. This study presents an innovative two-phase partitioning biotrickling filter coupled with magnetic bioenhancement, employing newly developed non-aqueous phase (silicone oil) immobilized polyurethane foams encapsulated in magnetically modified polyhedral hollow spheres. The removal efficiency of chlorobenzene (CB) improved by 15.6% in compared to the immobilized non-aqueous phase (INAPs) group, and by 37.2% in comparison to the control group at the inlet concentration of 150 mg/m3 with a residence time of 60 s. INAPs enhanced CB mass transfer, with kinetic analysis revealing further improvement induced by the magnetic field (MF). INAPs also promoted the secretion of extracellular polymers (EPS) by 26.8%, with enhanced secretion of loosely/tightly bound EPS promoting resistance to environmental stress. Microbial activity was optimized through INAPs that reduce substrate inhibition, with MF providing further microbial activation. The positively associated effects of INAP and MF on the microbial community was observed to lay the foundation for the positive enhancement of the combination. Overall, this study provides theoretical and technical support for the feasible and efficient treatment of industrial chlorinated volatile organic compounds.
Keywords:
VOCs
Biological enhancement
Mass transfer
Microbial activity
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