title: Treatment of gaseous alpha-pinene by a combined system containing photo oxidation and aerobic biotrickling filtration.
abstract: Biofiltration of hydrophobic and/or recalcitrant volatile pollutants is intrinsically limited. In the present study, a combined ultraviolet-biotrickling filter (UV-BTF) was developed to improve the removal of these compounds, and a single BTF as the control was operated under the same conditions. The experimental results showed that the UV-BTF provided higher removal efficiencies than the single BTF at an inlet concentration range of 600-1500 mg m(-3) under shorter residence times. The maximum elimination capacities (ECs) obtained were 94.2 mg m(-3)h(-1) and 44 mg m(-3)h(-1) in the combined UV-BTF and single BTF, respectively. The mass ratio of carbon dioxide produced to α-pinene removed in the UV-BTF was approximately 2.74, which was much higher than that of the single BTF (1.99). Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis indicated that there was more complicated microbial community in the UV-BTF than that in the single BTF. In addition, we investigated the effect of starvation or stagnation on re-acclimation and removal performance from an engineering standpoint. The results showed that the combined UV-BTF could deal with fluctuating conditions or periods without any flow (air or liquid) supply much better than the single BTF.
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
authors.forename: Zhuo-Wei
authors.initials: ZW
authors.lastname: Cheng
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Zhang
authors.forename: Jian-Meng
authors.initials: JM
authors.lastname: Chen
authors.forename: Jian-Ming
authors.initials: JM
authors.lastname: Yu
authors.forename: Zeng-Liang
authors.initials: ZL
authors.lastname: Gao
authors.forename: Yi-Feng
authors.initials: YF
authors.lastname: Jiang
mesh_terms: D000332:Aerobiosis; D000081008:Bicyclic Monoterpenes; D018533:Biomass; D019149:Bioreactors; D002245:Carbon Dioxide / Q000737:chemistry; D058645:Denaturing Gradient Gel Electrophoresis / Q000379:methods; D052918:Environmental Restoration and Remediation / Q000379:methods*; D004867:Equipment Design; D005374:Filtration; D005740:Gases; D008027:Light; D008855:Microscopy, Electron, Scanning / Q000379:methods; D039821:Monoterpenes / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012336:RNA, Ribosomal, 16S / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D014466:Ultraviolet Rays
chemical_list: D000081008:Bicyclic Monoterpenes; D005740:Gases; D039821:Monoterpenes; D012336:RNA, Ribosomal, 16S; D002245:Carbon Dioxide; C005451:alpha-pinene; D010100:Oxygen