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.
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。
