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首页> 外文期刊>Journal of Environmental Science and Health >Effect of switching gas inlet position on the performance of a polyurethane biofilter under transient loading for the removal of benzene, toluene and xylene mixtures
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Effect of switching gas inlet position on the performance of a polyurethane biofilter under transient loading for the removal of benzene, toluene and xylene mixtures

机译：瞬态负荷下气体入口位置的切换对聚氨酯生物滤池性能的影响，用于去除苯，甲苯和二甲苯混合物

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摘要

The performance of a polyurethane (PU) biofilter was evaluated using different operating modes (unidirectional flow (UF) and flow-directional switching (FDS) operations) under transient loading conditions (intermittent and shutdown). Gas mixtures containing benzene, toluene and xylene (BTX) were employed as model gases. Quantitative real-time PCR methods were used for targeting the tmoA gene responsible for BTX degradation and estimating density of the BTX-degraders in the PU filter bed. Although the overall BTX Removal efficiencies at the outlet (50 h~(-1) of space velocity) were similar between the UF and FDS biofilters, the removability of BTX in the FDS biofilter was higher than that in the UF biofilter until the 3rd sampling position (68 h~(-1) of space velocity). The BTX removal potentials and tmoA gene copy numbers of the FDS biofilter remained constant, irrespective of the distances from the inlet, but those of the UF biofilter increased with increasing distance from the inlet position. These results indicate that an even distribution of BTX degraders in the FDS filter bed contributed to better BTX removal performance. After a 10 day-shutdown, the performances of the UF and SDF biofilters were rapidly restored within 1 day.
机译：在瞬态负载条件（间歇和停机）下，使用不同的操作模式（单向流（UF）和流向切换（FDS）操作）评估了聚氨酯（PU）生物滤池的性能。包含苯，甲苯和二甲苯（BTX）的气体混合物用作模型气体。实时定量PCR方法用于靶向负责BTX降解的tmoA基因，并估计PU滤床中BTX降解子的密度。尽管UF和FDS生物滤池的出口处总BTX去除效率（空速50 h〜（-1））相似，但直到第三次采样后，FDS生物滤池中BTX的去除率仍高于UF生物滤池。位置（空速68 h〜（-1））。 FDS生物滤池的BTX去除潜力和tmoA基因拷贝数保持恒定，而不管距进水口的距离如何，但UF生物滤池的BTX去除潜力和tmoA基因拷贝数却随着距进水口距离的增加而增加。这些结果表明，BDS降解剂在FDS滤床上的均匀分布有助于提高BTX去除性能。关闭10天后，UF和SDF生物滤池的性能在1天之内迅速恢复。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2011年第13期|p.1570-1578|共9页
  • 作者

    EUN-HEE LEE; HEE WOOK RYU; KYUNG-SUK CHO;

  • 作者单位

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea;

    Department of Chemical and Environmental Engineering, Soongsil University, Seoul, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    volatile organic compound; polyurethane biofilter; flow direction; transient loading;

    机译：挥发性有机化合物;聚氨酯生物滤池;流动的方向;瞬态载荷;

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