污泥堆肥过程中VOCs浓度水平和反应活性研究

发布时间：2018-12-20 13:37

【摘要】：采用气质联用(GC/MS)方法研究了污泥堆肥过程中挥发性有机物(VOCs)的浓度水平和反应活性。结果表明,污泥堆肥过程中产生和排放的VOCs主要包括烷烃、烯烃、芳香烃、含氧有机化合物,VOCs产生量和排放量分别为34 052.0、710.8μg/m3,排放量仅为产生量的2.1%。产生的VOCs主要组分浓度从高到低依次为1-丁烯、丙酮和乙醇,其中烯烃类产生量最大,占比为76.43%;排放的VOCs主要组分浓度从高到低依次为2-丁酮、乙醇和丙酮,其中以含氧有机物类浓度最大。VOCs组分的反应活性从高到低依次为烯烃类、含氧有机物类、芳香烃类和烷烃类,产生和排放的VOCs最大臭氧生成潜势分别为264 164.8、2 038.3μg/m3,从产生到排放VOCs最大臭氧生成潜势降低了99.2%。考虑到含氧有机物类VOCs光解反应对O3生成的贡献,用增量反应活性法评价污泥好氧发酵过程产生和排放的VOCs对近地层大气圈的危害更为适宜。
[Abstract]:The concentration and reactive activity of volatile organic compounds (VOCs) in sludge composting were studied by GC/MS. The results showed that the VOCs produced and discharged during sludge composting mainly included alkanes, olefins, aromatic hydrocarbons, oxygen-containing organic compounds, VOCs production and emissions were 34,052.0710.8 渭 g / m ~ (3) respectively. The main components of VOCs produced were 1-butene, acetone and ethanol from high to low, among which alkenes produced the largest amount (76.43%). The main components of VOCs emitted from high to low are 2-butanone, ethanol and acetone, in which the concentration of oxygen-containing organic compounds is the largest. The reactivity of VOCs components from high to low are olefins, oxygen-containing organic compounds, aromatic hydrocarbons and alkanes. The maximum ozonation potential of VOCs is 264,164.8 渭 g / m ~ (3), which decreases 99.2 渭 g / m ~ (3) from generation to emission of VOCs. Considering the contribution of VOCs photolysis reaction of organic compounds containing oxygen to the formation of O 3, it is more appropriate to evaluate the harm of VOCs produced and discharged from aerobic sludge fermentation process to the near atmosphere by means of incremental reaction activity method.
【作者单位】：郑州轻工业学院环境污染治理与生态修复河南省协同创新中心;郑州市污水净化有限公司;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07204-001) 河南省科技攻关项目(142102310063) 郑州轻工业学院博士科研基金资助项目(2013BSJJ022)
【分类号】：X703;S141.4

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