Energy Technology Research Center, Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai Campus, Hat Yai, Songkhla 90110, Thailand.
Faculty of Environmental Management and PSU Energy System Research Institute (PERIN), Prince of Songkla University, Hat Yai Campus, Hat Yai, Songkhla 90110, Thailand.
Bioresour Technol. 2015 Mar;179:429-435. doi: 10.1016/j.biortech.2014.12.068. Epub 2014 Dec 27.
Triple stage and single stage biotrickling filters (T-BTF and S-BTF) were operated with oxygenated liquid recirculation to enhance bio-desulfurization of biogas. Empty bed retention time (EBRT 100-180 s) and liquid recirculation velocity (q 2.4-7.1 m/h) were applied. H2S removal and sulfuric acid recovery increased with higher EBRT and q. But the highest q at 7.1 m/h induced large amount of liquid through the media, causing a reduction in bed porosity in S-BTF and H2S removal. Equivalent performance of S-BTF and T-BTF was obtained under the lowest loading of 165 gH2S/m(3)/h. In the subsequent continuous operation test, it was found that T-BTF could maintain higher H2S elimination capacity and removal efficiency at 175.6±41.6 gH2S/m(3)/h and 89.0±6.8% versus S-BTF at 159.9±42.8 gH2S/m(3)/h and 80.1±10.2%, respectively. Finally, the relationship between outlet concentration and bed height was modeled. Step feeding of oxygenated liquid recirculation in multiple stages clearly demonstrated an advantage for sulfide oxidation.
采用充氧液体循环的三级和单级生物滴滤器（T-BTF 和 S-BTF）来增强沼气的生物脱硫。采用空床保留时间（EBRT100-180s）和液体循环速度（q2.4-7.1m/h）。H2S 去除率和硫酸回收率随着 EBRT 和 q 的增加而增加。但是，在 q 为 7.1m/h 时，大量液体通过介质，导致 S-BTF 中的床层孔隙率降低，H2S 去除率降低。在最低负荷 165gH2S/m(3)/h 下，S-BTF 和 T-BTF 的性能相当。在随后的连续运行测试中，发现 T-BTF 在 175.6±41.6gH2S/m(3)/h 和 89.0±6.8%时能够保持更高的 H2S 去除能力和去除效率，而 S-BTF 则分别为 159.9±42.8gH2S/m(3)/h 和 80.1±10.2%。最后，建立了出口浓度与床层高度的关系。多级充氧液体分步进料明显有利于硫化物的氧化。
