Dorado Antonio D, Husni Shafik, Pascual Guillem, Puigdellivol Carles, Gabriel David
Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya, Bases de Manresa 61-73, 08240 Manresa, Spain.
Department of Chemical Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain.
Waste Manag. 2014 Feb;34(2):344-51. doi: 10.1016/j.wasman.2013.10.044. Epub 2013 Dec 8.
Emissions of volatile organic compounds (VOCs) from the compost maturation building in a municipal solid waste treatment facility were inventoried by solid phase microextraction and gas chromatography-mass spectrometry. A large diversity of chemical classes and compounds were found. The highest concentrations were found for n-butanol, methyl ethyl ketone and limonene (ppmv level). Also, a range of compounds exceeded their odor threshold evidencing that treatment was needed. Performance of a chemical scrubber followed by two parallel biofilters packed with an advanced packing material and treating an average airflow of 99,300 m(3) h(-1) was assessed in the treatment of the VOCs inventoried. Performance of the odor abatement system was evaluated in terms of removal efficiency by comparing inlet and outlet abundances. Outlet concentrations of selected VOCs permitted to identify critical odorants emitted to the atmosphere. In particular, limonene was found as the most critical VOC in the present study. Only six compounds from the odorant group were removed with efficiencies higher than 90%. Low removal efficiencies were found for most of the compounds present in the emission showing a significant relation with their chemical properties (functionality and solubility) and operational parameters (temperature, pH and inlet concentration). Interestingly, benzaldehyde and benzyl alcohol were found to be produced in the treatment system.
采用固相微萃取和气相色谱 - 质谱联用技术，对城市固体废物处理设施中堆肥熟化车间的挥发性有机化合物（VOCs）排放进行了清单分析。发现了种类繁多的化学类别和化合物。正丁醇、甲乙酮和柠檬烯的浓度最高（达到百万分比体积水平）。此外，一系列化合物超过了其气味阈值，表明需要进行处理。评估了一个化学洗涤器，其后是两个填充有先进填料且处理平均气流为99300立方米/小时的并联生物滤池，用于处理已清查的VOCs的性能。通过比较进出口含量，根据去除效率评估了气味消除系统的性能。选定VOCs的出口浓度有助于识别排放到大气中的关键气味物质。特别是，在本研究中发现柠檬烯是最关键的VOC。在气味物质组中，只有六种化合物的去除效率高于90%。对于排放中存在的大多数化合物，去除效率较低，这与它们的化学性质（官能团和溶解度）和运行参数（温度、pH值和进口浓度）有显著关系。有趣的是，在处理系统中发现了苯甲醛和苯甲醇的生成。
