Title: | Enhanced removal of mixed VOCs with different hydrophobicities by Tween 20 in a biotrickling filter: Kinetic analysis and biofilm characteristics |
Author(s): | Deng Y; Yang G; Lens PNL; He Y; Qie L; Shen X; Chen J; Cheng Z; Chen D; |
Address: | "School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316004, China; College of Environment, Zhejiang University of Technology, Hangzhou 310032, China. School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316004, China. National University of Ireland, Galway H91TK33, Ireland. School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316004, China; Key Laboratory of Petrochemical Environmental Pollution Control of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316022, China. College of Environment, Zhejiang University of Technology, Hangzhou 310032, China. School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316004, China; Key Laboratory of Petrochemical Environmental Pollution Control of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316022, China. Electronic address: cdz@zjut.edu.cn" |
DOI: | 10.1016/j.jhazmat.2023.131063 |
ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
Abstract: | "Mass transfer limitation usually causes the poor performance of biotrickling filters (BTFs) for the treatment of hydrophobic volatile organic compounds (VOCs) during long-term operation. In this study, two identical lab-scale BTFs were established to remove a mixture of n-hexane and dichloromethane (DCM) gases using non-ionic surfactant Tween 20 by Pseudomonas mendocina NX-1 and Methylobacterium rhodesianum H13. A low pressure drop (=110 Pa) and a rapid biomass accumulation (17.1 mg g(-1)) were observed in the presence of Tween 20 during the startup period (30 d). The removal efficiency (RE) of n-hexane was enhanced by 15.0%- 20.5% while DCM was completely removed with the inlet concentration (IC) of 300 mg.m(-3) at different empty bed residence times in the Tween 20 added BTF. The viable cells and the relative hydrophobicity of the biofilm were increased under the action of Tween 20, which facilitated the mass transfer and enhanced the metabolic utilization of pollutants by microbes. Besides, Tween 20 addition enhanced the biofilm formation processes including the increased extracellular polymeric substance (EPS) secretion, biofilm roughness and biofilm adhesion. The kinetic model simulated the removal performance of the BTF with Tween 20 for the mixed hydrophobic VOCs, and the goodness-of-fit was above 0.9" |
Keywords: | "Bioreactors Polysorbates *Volatile Organic Compounds/analysis Kinetics Extracellular Polymeric Substance Matrix/chemistry *Air Pollutants/analysis Filtration Biofilms Hydrophobic and Hydrophilic Interactions Biodegradation, Environmental Biotrickling filt;" |
Notes: | "MedlineDeng, Ya Yang, Guangfeng Lens, Piet N L He, Yaxue Qie, Lingxiang Shen, Xingyu Chen, Jianmeng Cheng, Zhuowei Chen, Dongzhi eng Research Support, Non-U.S. Gov't Netherlands 2023/03/04 J Hazard Mater. 2023 May 15; 450:131063. doi: 10.1016/j.jhazmat.2023.131063. Epub 2023 Feb 21" |