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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Retrofitting existing chemical scrubbers to biotrickling filters for H2S emission control
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Retrofitting existing chemical scrubbers to biotrickling filters for H2S emission control

机译：将现有的化学洗涤塔改造为生物滴滤池以控制H2S排放

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Biological treatment is a promising alternative to conventional air-pollution control methods, but thus far biotreatment processes for odor control have always required much larger reactor volumes than chemical scrubbers. We converted an existing full-scale chemical scrubber to a biological trickling filter and showed that effective treatment of hydrogen sulfide (H2S) in the converted scrubber was possible even at gas contact times as low as 1.6 s. That is 8-20 times shorter than previous biotrickling filtration reports and comparable to usual contact times in chemical scrubbers. Significant removal of reduced sulfur compounds, ammonia, and volatile organic compounds present in traces in the air was also observed. Continuous operation for >8 months showed stable performance and robust behavior for H2S treatment, with pollutant-removal performance comparable to that achieved by using a chemical scrubber. Our study demonstrates that biotrickling filters can replace chemical scrubbers and be a safer, more economical technique for odor control. [References: 25]
机译：生物处理是常规空气污染控制方法的一种有前途的替代方法，但是迄今为止，用于气味控制的生物处理工艺始终需要比化学洗涤器大得多的反应器体积。我们将现有的全尺寸化学洗涤塔转换为生物滴滤池，结果表明，即使在气体接触时间低至1.6 s的情况下，也可以在转化后的洗涤塔中有效处理硫化氢（H2S）。这比以前的生物滴滤报告短了8-20倍，与化学洗涤器中的常规接触时间相当。还观察到了空气中痕量存在的还原性硫化合物，氨和挥发性有机化合物的大量去除。连续运行8个月以上，对H2S处理表现出稳定的性能和强大的性能，其污染物去除性能可与使用化学洗涤器相媲美。我们的研究表明，生物滴滤池可以代替化学洗涤塔，是一种更安全，更经济的气味控制技术。 [参考：25]

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