Zheng Xiangyu, Liu Yanqing, Kong Boning, Bultinck Trevor, Lu Wenjing
School of Environment, Tsinghua University, Beijing 100084, China.
School of Environment, Tsinghua University, Beijing 100084, China.
J Hazard Mater. 2024 Mar 15;466:133479. doi: 10.1016/j.jhazmat.2024.133479. Epub 2024 Jan 15.
In order to clarify the emission characteristics of VOCs during the initial degradation of kitchen waste, a year-long sampling campaign of kitchen waste in residential household municipal solid waste (HMSW) bins was conducted. A total of 93 VOCs with an average annual concentration of 2271 μg/m were detected. Alkanes and oxygenated compounds were the dominant released from the initial degradation of kitchen waste. Seasonal and daily variations were observed, with VOC concentrations generally higher in spring (1413 μg/m) and summer (5882 μg/m) and lower in autumn (505 μg/m) and winter (1258 μg/m). In addition, peak releases occurred earlier in the spring and summer (at 6 h) than in autumn and winter (at 24 h). Correlation analysis showed that ambient temperature correlated significantly with alkanes and oxygenated compounds (P < 0.01). 67 substances have been found to cause odor pollution. Based on the odor index, oxygenated compounds were the most significant odor pollutants. Acetaldehyde and 2-ketone required particular concern because of its high concentration and high odor index. This study not only enriched the understanding of emissions of VOCs from MSW front-end facilities but will also provide a scientific and theoretical basis for holistic management and odor control of MSW.
为了阐明厨余垃圾初始降解过程中挥发性有机物（VOCs）的排放特征，对居民家庭生活垃圾（HMSW）垃圾桶中的厨余垃圾进行了为期一年的采样。共检测到93种VOCs，年均浓度为2271μg/m。烷烃和含氧化合物是厨余垃圾初始降解过程中释放的主要成分。观察到季节性和日变化，VOC浓度在春季（1413μg/m）和夏季（5882μg/m）通常较高，而在秋季（505μg/m）和冬季（1258μg/m）较低。此外，春季和夏季的峰值释放时间（6时）早于秋季和冬季（24时）。相关性分析表明，环境温度与烷烃和含氧化合物显著相关（P<0.01）。已发现67种物质会造成气味污染。基于气味指数，含氧化合物是最主要的气味污染物。乙醛和2-酮因其高浓度和高气味指数而需要特别关注。本研究不仅丰富了对生活垃圾前端设施VOCs排放的认识，也将为生活垃圾的整体管理和气味控制提供科学理论依据。
