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首页> 外文期刊>Journal of Environmental Science and Health >Airlift bioreactor system for simultaneous removal of hydrogen sulfide and ammonia from synthetic and actual waste gases
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Airlift bioreactor system for simultaneous removal of hydrogen sulfide and ammonia from synthetic and actual waste gases

机译：空运生物反应器系统，用于同时从合成和实际废气中去除硫化氢和氨气

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The effectiveness of an airlift reactor system in simultaneously removing hydrogen sulfide (H2S) and ammonia (NH3) from synthetic and actual waste gases was investigated. The effects of various parameters, including the ratio of inoculum dilution, the gas concentration, the gas retention time, catalyst addition, the bubble size, and light intensity, on H2S and NH3 removal were investigated. The results revealed that optimal gas removal could be achieved by employing an activated inoculum, using a small bubble stone, applying reinforced fluorescent light, adding Fe2O3 catalysts, and applying a gas retention time of 20s. The shock loading did not substantially affect the removal efficiency of the airlift bioreactor. Moreover, more than 98.5% of H2S and 99.6% of NH3 were removed in treating actual waste gases. Fifteen bands or species were observed in a profile from denaturing gradient gel electrophoresis during waste gas treatment. Phylogenetic analysis revealed the phylum Proteobacteria to be predominant. Six bacterial strains were consistently present during the entire operating period; however, only Rhodobacter capsulatus, Rhodopseudomonas palustris, and Arthrobacter oxydans were relatively abundant in the system. The photosynthetic bacteria R. capsulatus and R. palustris were responsible for H2S oxidation, especially when the reinforced fluorescent light was used. The heterotrophic nitrifier A. oxydans was responsible for NH3 oxidation. To our knowledge, this is the first report on simultaneous H2S and NH3 removal using an airlift bioreactor system. It clearly demonstrates the effectiveness of the system in treating actual waste gases containing H2S and NH3.
机译：研究了空运反应器系统从合成和实际废气中同时去除硫化氢（H2S）和氨（NH3）的有效性。研究了接种稀释比，气体浓度，气体保留时间，催化剂添加，气泡大小和光强度等各种参数对H2S和NH3去除的影响。结果表明，采用活化接种物，使用小气泡石，施加增强的荧光灯，添加Fe2O3催化剂并保持20s的气体停留时间可以实现最佳的除气效果。冲击负荷基本上不影响空运生物反应器的去除效率。此外，在处理实际废气时，去除了98.5％的H2S和99.6％的NH3。在废气处理过程中，通过变性梯度凝胶电泳观察到了15个谱带或物种。系统发育分析表明门菌是主要的。在整个手术过程中始终存在6个细菌菌株。但是，在系统中只有荚膜红细菌，大红假单胞菌和氧化节杆菌。光合细菌荚膜芽孢杆菌和palustris造成硫化氢的氧化，尤其是在使用增强型荧光灯时。异养硝化器A. oxydans负责NH3的氧化。据我们所知，这是有关使用气举生物反应器系统同时去除H2S和NH3的第一份报告。它清楚地证明了该系统在处理含H2S和NH3的实际废气中的有效性。

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