title: Treatment of a BTo-X-contaminated gas stream with a biotrickling filter inoculated with microbes bound to a wheat bran/red wood powder/diatomaceous earth carrier.
abstract: Microbes bound to a wheat bran/red wood powder/diatomaceous earth carrier were used as inoculants for a biotrickling filter (BTF) for treating gases contaminated with a mixture of benzene, toluene, and o-xylene (BTo-X). An overall removal efficiency of more than 87.9% was achieved after a start-up period of as low as 4days. At BTo-X loading rates (LRs) below 60.0g/m(3)h, the BTF's performance was similar for EBRTs of 90, 60, 45 and 30s with an elimination capacity (EC) almost approaching the LR; stable REs above 91.3% for benzene and toluene and above 82.8% for o-xylene were achieved. A maximum EC of 97.7g/m(3)h was obtained at inlet load of 146.4g/m(3)h. The mass ratio of carbon dioxide produced to the BTo-X removed was approximately 2.62, which confirmed complete degradation of BTo-X. The results demonstrate that microbes bound to a solid carrier can be an alternative to traditional liquid inoculums applied in BTFs and highlight their potential applicability to BTF technologies.
authors.affiliation: School of Biological and Environmental Engineering, Zhejiang University of Technology, No. 6 District, Zhaohui, Hangzhou 310032, People's Republic of China.
authors.forename: Jian M
authors.initials: JM
authors.lastname: Chen
authors.forename: Run Y
authors.initials: RY
authors.lastname: Zhu
authors.forename: Wei B
authors.initials: WB
authors.lastname: Yang
authors.forename: Li L
authors.initials: LL
authors.lastname: Zhang
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001554:Benzene / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D002245:Carbon Dioxide / Q000032:analysis; D015169:Colony Count, Microbial; D007692:Diatomaceous Earth / Q000378:metabolism*; D004043:Dietary Fiber / Q000378:metabolism*; D005374:Filtration / Q000295:instrumentation*; D005740:Gases / Q000032:analysis*; D006841:Hydrocarbons, Aromatic / Q000302:isolation & purification*; D007700:Kinetics; D010100:Oxygen / Q000378:metabolism; D011208:Powders; D012037:Refuse Disposal / Q000295:instrumentation; D013997:Time Factors; D014050:Toluene / Q000302:isolation & purification; D014934:Wood / Q000378:metabolism*; D014992:Xylenes / Q000302:isolation & purification
chemical_list: D004043:Dietary Fiber; D005740:Gases; D006841:Hydrocarbons, Aromatic; D011208:Powders; D014992:Xylenes; D002245:Carbon Dioxide; D014050:Toluene; D007692:Diatomaceous Earth; D001554:Benzene; D010100:Oxygen; C026114:2-xylene