Department of Chemical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Iran.
Department of Chemical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Iran; Department of Chemical and Polymer Engineering, Faculty of Engineering, Yazd University, Yazd, Iran.
Environ Res. 2020 May;184:109380. doi: 10.1016/j.envres.2020.109380. Epub 2020 Mar 10.
Desulfurization of sour water was investigated in a combination system of trickling biofilter (BTF) and biofilter (BF) filled with ceramic packing materials. A critical elimination capacity (EC) of 251.93 g S m h was obtained for the BTF/BF system during a stepwise increase of sulfide concentration from 10 to 60 g S m. This stepwise increment of loading rate also led to critical ECs of 176.21 and 478.88 g S m h for BTF and BF, respectively. A dynamic model describing biological HS removal from sour water in the BTF/BF was developed and calibrated by a set of experimental data. The model includes the main processes occurring in the BTF/BF such as mass transfer between phases, diffusion and biological reaction inside the biofilm. The model also considers the intermediate (elemental sulfur) production/consumption and sulfate formation through the different oxidation pathways. The model validation was performed under a starvation period and a dynamic HS loading period. A sensitivity analysis was carried out to evaluate the relative importance of the key parameters on the performance of the BTF/BF system. Sensitivity analysis showed that the BTF performance is more affected by the parameters related to HS mass transfer.
采用滴滤生物滤池（BTF）和生物滤池（BF）组合系统，考察了含陶瓷填料的生物滤池处理含硫污水的脱硫性能。在逐步提高硫化物浓度从 10 到 60 g S m 的过程中，BTF/BF 系统获得了 251.93 g S m h 的临界去除容量（EC）。这种负荷率的逐步增加也分别导致了 BTF 和 BF 的临界 EC 达到 176.21 和 478.88 g S m h。建立并通过一组实验数据对描述 BTF/BF 中生物 HS 去除的动力学模型进行了标定。该模型包括 BTF/BF 中发生的主要过程，例如相间传质、生物膜内的扩散和生物反应。该模型还考虑了通过不同氧化途径生成/消耗中间产物（单质硫）和硫酸盐。在饥饿期和动态 HS 负荷期进行了模型验证。进行了敏感性分析，以评估关键参数对 BTF/BF 系统性能的相对重要性。敏感性分析表明，BTF 的性能更多地受到与 HS 传质相关的参数的影响。
