首页|Removal of fine particulate matter from cooking-oil fume using an intensified mobile chemical scrubber based on a rotating packed bed with green surfactants
Removal of fine particulate matter from cooking-oil fume using an intensified mobile chemical scrubber based on a rotating packed bed with green surfactants
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NSTL
Cooking-oil fumes (COFs) from street-food stalls in night markets have adverse effects on air quality and workers. This study proposes a floor-mounted, cylindrical, movable, small-sized rotating packed bed (RPB) coupled with green surfactants in a Span and Tween mixture as an intensified chemical scrubber for COF purification. Moreover, it is used for an on-site performance evaluation of PM2.5 removal efficiency (η_(PM2.5)) in a fried-food stall. With a hydrophilic-lipophilic balance of 6 (H6) from the Span and Tween mixture, an optimal dose of 8.2 g/L is achieved for an η_(PM2.5) of 88.8 %. Except for direct interception and inertial impaction, the RPB with H6 stimulates the emulsification of COFs, which is a dominant mechanism for the range of PM_(1-2.5). By comparing the effects of scrubbing solutions of water, traditional detergent, and H6, it is found that H6 exhibits the highest emulsification effect for η_(PM2.5) with low scent and manageable foaming level. A 7-day performance evaluation for commercial operation suggests that a promising η_(PM2.5) can be reached by maintaining the concentration of H6 in the scrubbing solution. Therefore, the effectiveness of the RPB with the bio-based H6 surfactant is clearly demonstrated by the removal of PM2.5 in commercial fried-food stalls. The findings shed light on the development and application of RPB with bio-based and eco-friendly surfactants for wet scrubbing of COFs in terms of particulate-matter removal in commercial fried-food stalls.
Cooking oil fume (COF)Fried-food stallHigh-gravity rotating packed bed (RPB)Span and Tween surfactantsFine particulate matter (PM_(2.5))
Chia-Yen Liang、Pei-Ting Hsu、Min-Hao Yuan
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Department of Occupational Safety and Health, China Medical University, Taichung 406, Taiwan
NSTL
