| 生物法处理高浓度H2S废气的现场试验 |
| 摘要点击 1416 全文点击 1306 投稿时间：2005-04-08 修订日期：2005-08-09 |
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| 中文关键词 H2S 生物滤床 生物滴滤床 大气污染控制 |
| 英文关键词 hydrogen sulfide biofilter biotrickling filter air pollution control |
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| 中文摘要 |
| 生物法处理废气的现场中试研究可为工业放大装置的设计和运行提供依据.采用规模为18 m3/h的中试装置现场处理某制药厂污水站含H2S浓度238.2～891.5 mg/m3的废气,研究对比了生物滤床(BF)和生物滴滤床(BTF)2种工艺对废气中H2S的去除效果和运行情况.试验表明,当气体空床停留时间(EBRT)为28 s时,在上述浓度范围内,BF和BTF均可几乎完全去除废气中的H2S,且运行稳定;BF的去除率随进口浓度的增加而减小,当EBRT为15 s,进口浓度从243.6 mg/m3增加到584.1 mg/m3时,去除率从95.2%下降到86.3%;BTF的去除率受进口浓度变化的影响较小,当EBRT为9 s时,在试验的浓度范围内,去除率达95%以上;BF和BTF的最大去除负荷分别为138 g/(m3.h)和205 g/(m3·h).床内生物膜中的菌落分析表明,BTF和BF填料表面的微生物都以细菌为主,但前者微生物生长密度高于后者.因此,综合考虑去除性能和运行控制等因素,工业放大装置宜采用BTF工艺. |
| 英文摘要 |
| The field-pilot test on biotreatment of waste gas is useful to provide adequate data for the design and operation of a full-scale system.In the test, two bioreactor systems(biofilter,BF and biotrickling filter,BTF) in parallel were set up to remove the odor containing 238.2～891.5 mg/m3 H2S.The test confirmed that H2S could be removed efficiently in the two filters.When the empty bed residence time(EBRT) was 28 s,both BF and BTF removed H2S almost completely.The removal efficiency of BF decreased with the increasing of H2S inlet concentration.When the EBRT was 15 s,the removal efficiency decreased from 95.2% to 86.3% as the inlet concentration increased from 243.6 mg/m3 to 584.1 mg/m3.When the EBRT was 9 s,the removal efficiency of BTF was more than 95%.The maximum elimination capacities of BF and BTF were 138 g/(m3·h) and 205 g/(m3·h) respectively.Although bacterium was dominated in the packing of BF and BTF,the density of organism in BTF was larger than that in BF.In all,it is more proper to apply the BTF technology into practice than the BF technology in a full-scale run,taking many factors into consideration such as the elimination capacity, operational control and so forth. |
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