Sulfur dioxide treatment from flue gases using a biotrickling filter - Bioreactor system
Sulfur dioxide treatment from flue gases using a biotrickling filter - Bioreactor system
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DOI：
10.1021/es026009d
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发表时间：
2003-05-01
影响因子：
11.4
通讯作者：
Deshusses, MA
中科院分区：
文献类型：
--
作者：
Philip, L;Deshusses, MA
采用生物滴滤塔-生物后处理单元两级工艺对烟气中的二氧化硫进行了完全处理。在300-1000 ppm（v）的模拟烟气中，当空床停留时间为6 s时，生物滴滤塔对SO2的去除率可达100%.吸收的SO2以SO2化学反应产物亚硫酸盐和亚硫酸盐生物氧化产物硫酸盐的形式回收到生物滴滤塔出水中。生物滴滤塔液体流出物在由厌氧和微需氧反应器组成的单一后处理单元中进一步生物处理，用于同时将硫酸盐和亚硫酸盐还原为硫化物和将硫化物氧化为元素硫。后处理单元能有效地处理生物滴滤塔出水并产生单质硫。反应器的产硫效率达到处理SO2的80%左右。这种新的生物处理系统似乎是一个有前途的替代烟气脱硫。
Complete treatment of sulfur dioxide (SO2) from flue gases in a two-stage process consisting of a biotrickling filter followed by biological post-treatment unit was investigated. The biotrickling filter could remove 100% of influent SO2 from simulated flue gas at an empty bed residence time of 6 s for a concentration range of 300-1000 ppm(v). All the absorbed SO2 was recovered in the biotrickling filter liquid effluent as sulfite (a product of chemical reaction of SO2) and sulfate (product of biological oxidation of sulfite). The biotrickling filter liquid effluent was further processed biologically in a single post-treatment unit consisting of a combined anaerobic and microaerophilic reactor for the simultaneous reduction of sulfate and sulfite to sulfide and oxidation of sulfide to elemental sulfur. The post-treatment unit could effectively treat the biotrickling filter effluent and produce elemental sulfur. The sulfur production efficiency of the reactor reached about 80% of the SO2 treated. This new biological treatment system seems to be a promising alternative for flue gas desulfurization.