...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Miniaturized Biotrickling Filters and Capillary Microbioreactors for Process Intensification of VOC Treatment with Intended Application to Indoor Air
【24h】

Miniaturized Biotrickling Filters and Capillary Microbioreactors for Process Intensification of VOC Treatment with Intended Application to Indoor Air

机译：微型生物滴滤池和毛细管生物反应器，用于室内空气中VOC处理的工艺强化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Typical biofilters and biotrickling filters used for volatile organic compounds (VOCs) control have treatment rates limited to 30-200 g m(-3) h(-1), mostly because they are exposed to dilute VOC streams, have moderate biomass density and activity, and moderate mass transfer coefficients. For these reasons and the concern over releasing bioaerosols and humidity, traditional biofilters and biotrickling filters are not ideal for the treatment of indoor air. Here we report on the development and evaluation of microbioreactors for the intensive treatment of VOCs that could be used for indoor air quality control, when coupled with a VOC microconcentrator (developed separately). The microconcentrator will function to adsorb VOCs from indoor air and release them to the microbioreactor at a higher concentration. The miniaturized bioreactors, with maximized surface area-to-volume ratios, allow for increased mixing and mass transfer of pollutants to the biofilm, resulting in a greater degradation rate of the VOCs. Three different microbioreactors were designed, constructed and their performance for removing vapors of toluene and methanol was assessed. Results showed that they were able to achieve maximum elimination capacities (ECs) for methanol around 1000 g m(-3) h(-1), 780 g m(-3) h(-1), and 12 600 g m(-3) h(-1) for the glass beads packed bed, polyurethane (PU) foam biotrickling filters and capillary microbioreactor, respectively, and around 120 g m(-3) h(-1), 250 g m(-3) h(-1) and 3050 g m(-3) h(-1), respectively, when treating toluene vapors. These values, especially for the capillary microbioreactor, are 40-80 times greater than the rates generally obtained in conventional biofilters and biotrickling filters. The interphase mass transfer coefficient (K(L)a) was determined. The capillary microbioreactor had values 13-17 times greater than the other two bioreactors, suggesting that improved mass transfer could have contributed to the very high performance observed in the capillary microbioreactor. The results demonstrate that microbioreactors are promising novel technologies for controlling small amounts of organic pollutants.
机译：用于挥发性有机化合物（VOC）控制的典型生物滤池和生物滴滤池的处理速度限制为30-200 gm（-3）h（-1），主要是因为它们暴露于稀VOC流中，具有适度的生物量密度和活性，和中等的传质系数。由于这些原因以及对释放生物气溶胶和湿度的担忧，传统的生物滤池和生物滴滤池不是处理室内空气的理想选择。在这里，我们报告了与VOC微型浓缩器（单独开发）结合使用时，可用于室内空气质量控制的VOC强化处理的微生物反应器的开发和评估。微浓缩器将起到吸收室内空气中VOC的作用，并将其以更高的浓度释放到微生物反应器中。具有最大表面积/体积比的微型化生物反应器可以增加污染物向生物膜的混合和质量转移，从而提高VOC的降解率。设计，构建了三种不同的微生物反应器，并评估了它们去除甲苯和甲醇蒸气的性能。结果表明，它们能够在1000 gm（-3）h（-1），780 gm（-3）h（-1）和12600 gm（-3）h左右达到最大消除甲醇（EC）的能力。 （-1）对于玻璃珠填充床，聚氨酯（PU）泡沫生物滴滤池和毛细管微生物反应器分别为120 gm（-3）h（-1），250 gm（-3）h（-1）和处理甲苯蒸气时分别为3050 gm（-3）h（-1）。这些值，特别是对于毛细管微生物反应器，是常规生物滤池和生物滴滤池通常获得的速率的40-80倍。确定相间传质系数（K（L）a）。毛细管微生物反应器的值比其他两个生物反应器大13-17倍，这表明改进的传质可能有助于在毛细管微生物反应器中观察到非常高的性能。结果表明，微生物反应器是控制少量有机污染物的有前途的新技术。

著录项

  • 来源
    《Environmental Science & Technology》 |2019年第3期|1518-1526|共9页
  • 作者

    de Leon Luis Rafael Lopez; Deaton Kelsey E.; Deshusses Marc A.;

  • 作者单位

    Duke Univ, Dept Civil & Environm Engn, 127C Hudson Hall,Box 90287, Durham, NC 27708 USA;

    Duke Univ, Dept Civil & Environm Engn, 127C Hudson Hall,Box 90287, Durham, NC 27708 USA;

    Duke Univ, Dept Civil & Environm Engn, 127C Hudson Hall,Box 90287, Durham, NC 27708 USA;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号