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학술저널
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한국입자에어로졸학회 PARTICLE AND AEROSOL RESEARCH PARTICLE AND AEROSOL RESEARCH 제7권 제1호
발행연도
2011.1
수록면
9 - 19 (11page)

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The effects of different transient loading conditions on xylene removability and bacterial activity were evaluated in the polyurethane (PU) biofilter inoculated with Rhodococcus sp. EH831: BF1 (the control) was operated under continuous and constant loading (200±50 ppm); BF2 under continuous and constant loading after a 2-week long-term shutdown;BF3 under discontinuous (8 h on/16 h off on weekdays and a 2 day-shutdown at weekends) and constant loading BF4under discontinuous and high loading (700 ± 300 ppm); and BF5 under continuous and fluctuating loading (high loading for 8 h and low loading (75±25 ppm) for 16 h on weekdays and low loading at weekends). Xylene removal efficiencies in the BF1, BF2,BF3 and BF5 were ranged 83 –89%, indicating that 2-week long-term shutdown,intermittent or fluctuant loading condition did not significantly influence the biofilter performance. However,discontinuous and high load condition (BF4) caused to deteriorate xylene removability to 52%. Rhodococcus sp. EH831 could be maintained at 109~1010 CFU/g-dry PU under 5 kinds of loading conditions. The result of polymerase chain reaction-terminal-restriction fragment length polymorphismshowed that there was no significant change in bacterial community structures by different loading conditions.

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