Laboratory of Environmental Biology and Life Support Technology, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
Bioresour Technol. 2011 Jan;102(2):576-84. doi: 10.1016/j.biortech.2010.07.119. Epub 2010 Aug 4.
To establish an economical and environmentally friendly technology for ethylene removal from horticultural facilities and industrial point sources, a bench-scale natural zeolite biofiltration system was developed in this study. The system was evaluated for its performance in removing ethylene from an artificially contaminated air stream and characterized for its bacterial diversity under varied ethylene concentrations, and in different spatial stages of the filter. The biofilter enabled to approximately 100% remove ethylene at loading rates of 0.26-3.76 g m(-3) h(-1) when operated with inoculum containing enriched ethylene-degrading bacteria. The bacterial diversity and abundance varied with the height of the biofilter. Moreover, the occurrence and predominance of specific bacterial species varied with the concentrations of ethylene introduced into the biofilter, as observed by PCR-DGGE methods. Phylogenetic analysis indicated that the biofilter system supported a diverse community of ethylene-degrading bacteria, with high similarity to species in the classes Betaproteobacteria, Gammaproteobacteria, Bacilli, and Actinobacteria.
为了建立一种经济环保的园艺设施和工业点源去除乙烯的技术，本研究开发了一种台架规模的天然沸石生物过滤系统。该系统评价了其从人工污染气流中去除乙烯的性能，并在不同的乙烯浓度和过滤不同空间阶段下对其细菌多样性进行了特征描述。在接种含有富集乙烯降解菌的情况下，当操作负荷率为 0.26-3.76 g m(-3) h(-1) 时，生物滤器可实现对乙烯的近 100%去除。细菌多样性和丰度随生物滤器的高度而变化。此外，通过 PCR-DGGE 方法观察到，随着生物滤器中引入的乙烯浓度的变化，特定细菌种类的出现和优势也发生了变化。系统发育分析表明，生物过滤系统支持了一个多样化的乙烯降解细菌群落，与β变形菌纲、γ变形菌纲、芽孢杆菌纲和放线菌纲的物种高度相似。
