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High-temperature biotrickling filtration of hydrogen sulphide

机译：硫化氢的高温生物滴滤

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Biofiltration of malodorous reduced sulphur compounds such as hydrogen sulphide has been confined to emissions that are at temperatures below 40 degrees C despite the fact that there are many industrial emissions (e.g. in the pulp and paper industry) at temperatures well above 40 degrees C. This paper describes our study on the successful treatment of hydrogen sulphide gas at temperatures of 40, 50, 60 and 70 degrees C using a microbial community obtained from a hot spring. Three biotrickling filter (BTF) systems were set up in parallel for a continuous run of 9 months to operate at three different temperatures, one of which was always at 40 degrees C as a mesophilic control and the other two were for exploring high-temperature operation up to 70 degrees C. The continuous experiment and a series of batch experiments in glass bottles (250 ml) showed that addition of glucose and monosodium glutamate enhanced thermophilic biofiltration of hydrogen sulphide gas and a removal rate of 40 g m(-3)h(-1) was achieved at 70 degrees C. We suggest that the glucose is acting as a carbon source for the existing microbial community in the BTFs, whereas glutamate is acting as a compatible solute. The use of such organic compounds to enhance biodegradation of hydrogen sulphide, particularly at high temperatures, has not been demonstrated to our knowledge and, hence, has opened up a range of possibilities for applying biofiltration to hot gas effluent.
机译：尽管存在许多工业排放物（例如，制浆和造纸业）的温度远高于40摄氏度，但恶臭的还原性硫化合物（如硫化氢）的生物过滤仅限于温度低于40摄氏度的排放物。论文描述了我们在40、50、60和70摄氏度温度下使用从温泉中获得的微生物群落成功处理硫化氢气体的研究。并行设置了三个生物滴滤器（BTF）系统，连续运行9个月，可在三个不同的温度下运行，其中一个始终在40摄氏度下作为中温对照，另外两个用于探索高温运行高达70°C。在玻璃瓶（250 ml）中进行的连续实验和一系列分批实验表明，添加葡萄糖和味精可增强硫化氢气体的嗜热生物过滤，去除速率为40 gm（-3）h（ -1）是在70摄氏度下实现的。我们建议，葡萄糖是BTF中现有微生物群落的碳源，而谷氨酸则是相容的溶质。就我们所知，尚未证明使用这种有机化合物来增强硫化氢的生物降解，特别是在高温下，因此开辟了将生物过滤应用于热气流出物的可能性。

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