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Sci Total Environ

Title:		Emission characteristics of VOCs and potential ozone formation from a full-scale sewage sludge composting plant
Author(s):		Nie E; Zheng G; Gao D; Chen T; Yang J; Wang Y; Wang X;
Address:		"Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: zhenggd@igsnrr.ac.cn. Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China"
Journal Title:		Sci Total Environ
Year:		2019
Volume:		20181227
Issue:
Page Number:		664 - 672
DOI:		10.1016/j.scitotenv.2018.12.404
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Volatile organic compounds (VOCs) are the major components of the odor emitted from sewage sludge composting plants and are generally associated with odorous nuisances and health risks. However, few studies have considered the potential ozone generation caused by VOCs emitted from sewage sludge composting plants. This study investigated the VOC emissions from a full-scale composting plant. Five major treatment units of the composting plant were chosen as the monitoring locations, including the dewatered room, dewatered sludge, blender room, fermentation workshop, and product units. The fermentation workshop units displayed the highest concentration of VOC emissions at 2595.7?ª++/-?ª+1367.3?ª+mug.m(-3), followed by the blender room, product, dewatered sludge, and dewatered room units, whose emissions ranged from 142.2?ª++/-?ª+86.8?ª+mug.m(-3) to 2107.6?ª++/-?ª+1045.6?ª+mug.m(-3). The detected VOC families included oxygenated compounds, alkanes, alkenes, sulfide compounds, halogenated compounds, and aromatic compounds. Oxygenated compounds, particularly acetone, were the most abundant compounds in all samples. Principal component analysis revealed that the dewatered room and dewatered sludge units clustered closely, as indicated by their similar component emissions. The product units differed from the other sampling units, as their typical compounds were methanethiol, styrene, carbon disulfide, and hexane, all of which were the products of the latter stages of composting. Among the treatment units, the fermentation workshop units had the highest propylene equivalent (propy-equiv) concentration. Dimethyl disulfide and limonene were the major contributors. Limonene had the highest propy-equiv concentration, which contributed to the increased atmospheric reactivity and ozone formation potential in the surrounding air. To control the secondary environmental pollution caused by the VOC emissions during sewage sludge composting, the emission of limonene and dimethyl disulfide must be controlled from the blender room and fermentation workshop units"
Keywords:		Air Pollutants/*analysis China Composting *Environmental Monitoring Ozone/*analysis Sewage/*chemistry Volatile Organic Compounds/*analysis Potential ozone formation Sewage sludge Volatile organic compounds;
Notes:		"MedlineNie, Erqi Zheng, Guodi Gao, Ding Chen, Tongbin Yang, Junxing Wang, Yuewei Wang, Xiankai eng Netherlands 2019/05/18 Sci Total Environ. 2019 Apr 1; 659:664-672. doi: 10.1016/j.scitotenv.2018.12.404. Epub 2018 Dec 27"