Removal of dimethyl sulfide in a thermophilic membrane bioreactor
Removal of dimethyl sulfide in a thermophilic membrane bioreactor
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DOI：
10.1002/jctb.1926
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发表时间：
2008-09
影响因子：
3.4
通讯作者：
M. Luvsanjamba;Amit Kumar;H. Langenhove
中科院分区：
文献类型：
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作者：
M. Luvsanjamba;Amit Kumar;H. Langenhove
背景技术背景：一些来源，如造纸和纸浆工业以及废物处理厂，在高温下排放含有挥发性有机硫化合物的废气。由于冷却热气体增加了生物反应器的运行成本，嗜热微生物的应用可能是一种具有成本效益的解决方案。本研究的目的是研究在高温条件下（52 °C）在膜生物反应器中从废气中去除二甲基硫醚的可能性，并检查反应器在高温下的长期稳定性。考察了气体停留时间、营养物供给、降温和短期停堆等操作条件对去除能力的影响。研究结果：在64 g m − 3 h−1（0.128 g m−2 h−1）的质量负荷率下获得54 g m − 3 h − 1（0.108 g m−2 h −1）的最大去除能力，在24 s的气体停留时间下去除效率为84%。对高温膜生物反应器进行了9个月的长期运行跟踪。虽然连续运行3个月后去除率下降到50%，但通过应用高速液体循环去除多余的生物质后，去除率恢复到96%以上。结论：该研究表明，在气体停留时间为24 s时，在消除能力为54 g m−3 h−1（0.108 g m−2 h−1）的嗜热膜生物反应器中，二甲硫醚的去除是可能的。版权所有© 2008化学工业协会
BACKGROUND: Several sources such as the paper and pulp industry and waste treatment plants emit waste gases containing volatile organic sulfur compounds at elevated temperature. Since cooling the hot gases increases the operational cost of biological reactors, application of thermophilic microorganisms could be a cost-effective solution. The objectives of this study were to investigate the possibility of removal of dimethyl sulfide from waste gases under thermophilic conditions (52 °C) in a membrane bioreactor and to examine the long-term stability of the reactor at elevated temperature. The effects of operating conditions such as gas residence time, nutrient supply, temperature decrease and short-term shutdown on elimination capacity were investigated. RESULTS: A maximum elimination capacity of 54 g m−3 h−1 (0.108 g m−2 h−1) was obtained at a mass loading rate of 64 g m−3 h−1 (0.128 g m−2 h−1) with a removal efficiency of 84% at a gas residence time of 24 s. The long-term operation of the thermophilic membrane bioreactor was followed for 9 months. Although the removal efficiency decreased to 50% after 3 months of continuous operation, it recovered (>96%) after the excess biomass was removed by applying high-velocity liquid recirculation. CONCLUSION: This study demonstrated that the dimethyl sulfide removal is possible in a thermophilic membrane bioreactor with an elimination capacity of 54 g m−3 h−1 (0.108 g m−2 h−1) at a gas residence time of 24 s. Copyright © 2008 Society of Chemical Industry