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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Characterization of an organic filter medium for the bilofiltration treatment of air contaminated with 1,2-dichlorobenzene
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Characterization of an organic filter medium for the bilofiltration treatment of air contaminated with 1,2-dichlorobenzene

机译：有机过滤介质的特征，用于对被1,2-二氯苯污染的空气进行双滤处理

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Laboratory experiments were conducted to determine the potential for removing 1,2-dichlorobenzene (1,2-DCB) in gaseous phase by biofiltration. Experiments were carried out over 8 months in a steel tank (0.45 m(3)) using an organic filter medium composed of peat, maple wood chips, chicken manure and 1,2-DCB-contaminated soil. During the first 6 months, the biofilter was operated without injecting 1,2-DCB in order to characterize the physicochemical, mechanical and microbiological properties of the filter bed. The results revealed that it is an excellent medium for both microbial development (up to 10(9) cells g(dry soil)(-1) for heterotrophic bacteria) and long-term stability with a limited drop dry of pressure (30 cm of water) and no clogging. Over the final 2 months, the biofifter treated air laden with 1,2-DCB (0.30 and 0.75 g m(-3)) and the maximum elimination capacity reached was 9 g m(-3) h(-1) (inlet load of 13 g m(-3) h(-1)), which represented 69% efficiency. Elimination performance was strongly dependent upon inlet concentration, sorption/desorption and biodegradation phenomena occurring in the filter medium. Sorption/desorption and biodegradation mechanisms during the start-up period were characterized using the elimination efficiency (%). At the beginning of the 1,2-DCB injection, the microorganisms were strongly impacted and sorption/desorption phenomena prevailed. With the decrease of the inlet concentration, biodegradation progressively increased to become the most important mechanism. It was concluded that biofiltration possesses an excellent potential for treating volatile chlorinated benzene, known to be recalcitrant to biodegradation. (C) 2003 Society of Chemical Industry.
机译：进行实验室实验以确定通过生物过滤去除气相中的1,2-二氯苯（1,2-DCB）的潜力。实验是在一个钢制储罐（0.45 m（3））中使用由泥炭，枫木碎屑，鸡粪和1,2-DCB污染的土壤组成的有机过滤介质，在8个月内进行的。在最初的6个月中，生物滤池在不注入1,2-DCB的情况下运行，以表征滤床的物理化学，机械和微生物特性。结果表明，它是微生物发育（异养细菌最多10（9）个细胞g（干燥土壤）（-1））和长期稳定性的极佳培养基，且压力下降幅度很小（30 cm。水），并且不会堵塞。在最后两个月中，用生物滤池处理过的空气中装有1,2-DCB（0.30和0.75 gm（-3）），达到的最大消除能力为9 gm（-3）h（-1）（进样口13 gm（-3）h（-1）），代表效率为69％。消除性能在很大程度上取决于过滤介质中的入口浓度，吸附/解吸和生物降解现象。使用消除效率（％）对启动期间的吸附/解吸和生物降解机理进行了表征。在1,2-DCB注射开始时，微生物受到了强烈影响，并且吸附/解吸现象盛行。随着入口浓度的降低，生物降解逐渐增加成为最重要的机理。结论是，生物滤具有处理挥发性氯苯的极好的潜力，已知该氯苯对生物降解具有顽固性。 （C）2003年化学工业协会。

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