随着现代工业的迅速发展,大量的挥发性有机化合物(VOCs)被排放到大气中。VOCs以其来源广、危害大的特点而成为仅次于颗粒污染物的第二大大气污染物。大气中逐渐增加的VOCs已经成为当今关注的重要环境问题之一。传统处理VOCs废气方法主要有燃烧、冷凝、吸附、吸收等。生物过滤法是一个相对较新的处理大气量、可生化VOCs的废气处理技术。凭简单高效、费用低、无二次污染等特点,生物过滤法成为一简单、高效及具有前景的VOCs废气处理技术。本文对传统方法与生物过滤法进行了比较,并在综述生物过滤法处理VOCs废气的研究进展和目前存在的主要问题基础上,分别对影响生物过滤法处理VOCs废气的主要影响因素,包括底物VOCs性质、填料选择、填料湿度、pH值、营养、温度、微生物等进行总结和评述,对今后生物过滤法处理VOCs的发展趋势进行展望并提出建议。
With the rapid industrial development, a large quantity of Volatile Organic Compounds(VOCs) is released from various plants and industrial processes.VOCs have become the second most serious pollutants due to their serious harm and extensive source.The increasing presence of VOCs in the atmosphere has been one of today's considerable environmental problems.Conventional VOCs control technologies include incineration, condensation, adsorption, absorption technologies.Biofiltration of off-gases is a relatively new application of biological process in the waste management.Biofiltration used to be used to remove air streams contaminated with low concentrations of biologically degradable VOCs and is recognized as a cost-effective and promising technology with advantages of high efficiency, low cost and limited negative environmental effects.In this paper, a comparison between conventional technologies and biofiltration is made and the development of biofiltration of VOCs and main problems in removal of VOCs by biofilters are discussed.The main influencing factors, such as VOCs characteristics, packing media, water content, pH value, nutrients, bed temperature and microorganisms, are analyzed.Some suggestions on the prospect of biological removal of VOCs are made.