Removal of o-xylene from off-gas by a combination of bioreactor and adsorption

Removal of o-xylene from off-gas by a combination of bioreactor and adsorption
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生物反应器与吸附相结合去除废气中的邻二甲苯

DOI:
10.1002/apj.172
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发表时间:
2008-09
影响因子:
1.8
通讯作者:
Feng, Q.C.
Feng, Q.C.
中科院分区:
工程技术4区
文献类型:
--
作者:
Wang, S.B.;Li, L.;Liu, J.X.;Feng, Q.C.

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生物过滤是一种有效的废气处理技术。然而,生物过滤系统需要大体积的生物反应器,并且适应废气中波动的浓度是缓慢的。为了克服这些缺点,本研究研究了一种集成生物过滤器和吸附单元的实验室规模系统,用于处理含有邻二甲苯的气体。吸附单元采用颗粒活性炭(GAC)填充。结果表明,当邻二甲苯进水浓度小于900 mg/m3时,生物过滤塔对邻二甲苯的去除率可达90%以上,当邻二甲苯负荷小于100 g/m3 h时,生物过滤塔的最大去除能力为80 g/m3 h。进气中邻二甲苯浓度过高会导致生物过滤器过载。采用该吸附装置,邻二甲苯的出口浓度可显著降低。考察了活性炭的表面性质及影响吸附性能的因素,并对活性炭的再生方法进行了评价。吸附-微生物联合工艺不仅具有较高的邻二甲苯去除率,而且提高了系统的抗冲击负荷能力。2008年科廷科技大学和约翰威利父子有限公司
Biofiltration is an effective technology for the treatment of gaseous waste. However, a biofiltration system needs a bioreactor of large volume and it is slow to adapt to fluctuating concentrations in waste gas. To overcome these disadvantages, a bench-scale system integrating a biofilter and an adsorption unit for the treatment of gases containing o-xylene was investigated in this study. The adsorption unit was packed with granule active carbon (GAC). The results showed that 90% of o-xylene could be removed in the biofilter at an inlet concentration below 900 mg/m 3 .T he maximum elimination capacity was 80 g/m 3 h when the o-xylene loading rate was less than 100 g/m 3 h. High o-xylene concentration in inlet gas resulted in an overload of the biofilter. Using the adsorption unit, the outlet concentration of o-xylene could be reduced significantly. The surface properties of GAC and the factors affecting the adsorption performance were investigated, and GAC regeneration method was also evaluated. The combination of adsorption and microbial processes not only led to a high and stable efficiency of o-xylene removal, but also improved the capacity of resisting the shock loads.  2008 Curtin University of Technology and John Wiley & Sons, Ltd.
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影响因子: 2
作者:
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