Biomass Control via UV Lamp Application and Nutrient Supply Restriction in the Biofiltration of Gaseous VOCs  

作　　者：Takashi Higuchi Kokoro Hashizume 

机构地区：[1]School of Science and Engineering,Ritsumeikan University,1-1-1 Noji-higashi,Kusatsu,Shiga 525-8577,Japan [2]Graduate School of Science and Engineering,Ritsumeikan University,1-1-1 Noji-higashi,Kusatsu,Shiga 525-8577,Japan

出　　处：《Journal of Environmental Science and Engineering(B)》2024年第3期97-104,共8页环境科学与工程（B）

摘　　要：Biofiltration may have clogging problems owing to excess biomass growth during the treatment of gaseous pollutants.In this study,we employed an UV(Ultraviolet)lamp and controlled the nutrient supply to conduct a biofiltration process for treating 2-butanone(MEK:Methyl Ethyl Ketone)and toluene in a gas stream.Two methods of UV lamp usage(direct and indirect irradiation)and several nutrient supply methods were tested.However,no clear effect was observed with either UV usage.Under the optimal conditions,97%of the MEK and 69%of the toluene gases were removed after 29 s of EBRT(Empty Bed Retention Time).The inlet loads were 18 and 19 mg/(m^(3)·h)for MEK and toluene,respectively.Under these conditions,23 g-N/(m^(3)·day)of nitrate-nitrogen was consumed.Excess biomass growth occurred during simultaneous excess nutrient supply and a persistent irrigation schedule.In this study,we demonstrated the effective use of a dense nitrate solution to deliver an appropriate amount of nutrients and moisture,and the optimal irrigation frequency was four times per week.

关 键 词：BIOFILTRATION gaseous VOCs(Volatile Organic Compounds) nutrient supply UV lamp ozone 

分 类 号：O62[理学—有机化学]