Removal of xylene from off-gas using a bioreactor containing bacteria and fungi
Removal of xylene from off-gas using a bioreactor containing bacteria and fungi
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DOI：
10.1016/j.ibiod.2006.07.002
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发表时间：
2006-09-01
影响因子：
4.8
通讯作者：
Liu, J. X.
中科院分区：
文献类型：
--
作者：
Li, L.;Liu, J. X.
挥发性有机化合物（VOCs），如苯、甲苯和二甲苯，是石油和精细化工的主要成分，是可能致癌的物质，会产生难闻的气味，因此必须严格控制其释放到环境中。实验室规模的组合式生物反应器由两个区域组成，一个区域含有细菌悬浮液，另一个区域填充有用于真菌附着生长的材料，用于处理不同水溶性的VOCs。二甲苯及其三种异构体在稳态下的平均消除能力为62 g m（-3）h（-1）。第一区总去除率> 90%~ 24.0%，第二区总去除率为67.6%。液气流量比Q（1）/Q（g）影响两区中邻、间、对二甲苯异构体的脱除效率。增加Q（1）/Q（g）比导致第一区中邻二甲苯和间/对二甲苯的去除增加，而第二区中的去除减少。当Q（1）/Q（g）比> 0.15时，在第一区中比在第二区中去除更多的邻二甲苯。反应器内两个区域的微生物种群数量不同，因此，在这两个区域中，二甲苯被不同种类的微生物降解。(c)2006爱思唯尔有限公司保留所有权利。
Volatile organic compounds (VOCs) such as benzene, toluene and xylene, which are major constituents of petroleum and fine chemical industries, are possible carcinogens and can cause offensive odors, so that their release into the environment must be strictly controlled. A bench-scale combined-bioreactor consisting of two zones, one containing a bacterial suspension and the other packed with material for the attached growth of fungi, was used to treat VOCs of different water solubilities. The average elimination capacity for xylene, with its three isomers, in steady state was 62 g m(-3) h(-1). The total removal rate was > 90%-24.0% in the first zone and 67.6% in the second. The ratio of the liquid and gas flows (Q(1)/Q(g)) influenced the removal efficiencies of the isomers o-, in- and p-xylene in the two zones. Increasing the Q(1)/Q(g) ratio led to increased removal of both o-xylene and in-/p-xylene in the first zone and decreased removal in the second. When the Q(1)/Q(g) ratio was > 0.15, more o-xylene was removed in the first zone than in the second. The microbial populations were found in the two zones of the reactor differed, so that the xylene was degraded by different kinds of microorganisms in these zones. (c) 2006 Elsevier Ltd. All rights reserved.