缺氧生物滴滤塔去除 H2S 的瞬态运行。
Transient-state operation of an anoxic biotrickling filter for HS removal.
机构信息
Tampere University, Faculty of Engineering and Natural Sciences, P. O. Box 541, 33014 Tampere, Finland.
Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, 80125 Naples, Italy.
出版信息
J Hazard Mater. 2019 Sep 5;377:42-51. doi: 10.1016/j.jhazmat.2019.05.043. Epub 2019 May 21.
The application of an anoxic biotrickling filter (BTF) for HS removal from contaminated gas streams is a promising technology for simultaneous HS and NO removal. Three transient-state conditions, i.e. different liquid flow rates, wet-dry bed operations and HS shock loads, were applied to a laboratory-scale anoxic BTF. In addition, bioaugmentation of the BTF with a HS removing-strain, Paracoccus MAL 1HM19, to enhance the biomass stability was investigated. Liquid flow rates (120, 60 and 30 L d) affected the pH and NO removal efficiency (RE) in the liquid phase. Wet-dry bed operations at 2-2 h and 24-24 h reduced the HS elimination capacity (EC) by 60-80%, while the operations at 1-1 h and 12-12 h had a lower effect on the BTF performance. When the BTF was subjected to HS shock loads by instantly increasing the gas flow rate (from 60 to 200 L h) and HS inlet concentration (from 112 (± 15) to 947 (± 151) ppm), the BTF still showed a good HS RE (>93%, EC of 37.8 g S m h). Bioaugmentation with Paracoccus MAL 1HM19 enhanced the oxidation of the accumulated S to sulfate in the anoxic BTF.
应用缺氧生物滴滤塔（BTF）去除污染气流中的 H2S 是一种同时去除 H2S 和 NO 的有前途的技术。三种瞬态条件，即不同的液体流速、干湿床操作和 H2S 冲击负荷，应用于实验室规模的缺氧 BTF。此外，通过添加具有 H2S 去除能力的菌株 Paracoccus MAL 1HM19 对 BTF 进行生物增强，以增强生物量稳定性。液体流速（120、60 和 30 L/d）影响液相中的 pH 和 NO 去除效率（RE）。2-2 h 和 24-24 h 的干湿床操作使 H2S 消除能力（EC）降低了 60-80%，而 1-1 h 和 12-12 h 的操作对 BTF 性能的影响较小。当 BTF 受到 H2S 冲击负荷的影响，即通过瞬间增加气体流量（从 60 增加到 200 L/h）和 H2S 入口浓度（从 112（±15）增加到 947（±151）ppm）时，BTF 仍表现出良好的 H2S RE（>93%，EC 为 37.8 g S/m/h）。用 Paracoccus MAL 1HM19 进行生物增强可促进缺氧 BTF 中积累的 S 氧化为硫酸盐。
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