title: Online monitoring of volatile organic compound production and emission during sewage sludge composting.
abstract: The production and emission of volatile organic compounds (VOCs) were studied using an online monitoring method in a well-operated sludge composting plant. Results indicated that VOC production within the pile was different from emission at the pile surface. The total mass of VOC production was 1.09gCkgDM(-1), which was 2.3 times as high as the total mass of emission. The maximum production and emission masses occurred in the mesophilic phase of composting and were 444 and 202mgkgDM(-1)d(-1), respectively. VOC production and emission rates also varied rapidly at different times. The relationship of VOC production rates and time in an on/off aeration cycle at different periods could be expressed as a quadratic equation, while the emission rate could be expressed as a linear equation.
authors.affiliation: Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China. shenyj.09b@igsnrr.ac.cn
authors.forename: Yujun
authors.initials: Y
authors.lastname: Shen
authors.forename: Tong-Bin
authors.initials: TB
authors.lastname: Chen
authors.forename: Ding
authors.initials: D
authors.lastname: Gao
authors.forename: Guodi
authors.initials: G
authors.lastname: Zheng
authors.forename: Hongtao
authors.initials: H
authors.lastname: Liu
authors.forename: Qiwei
authors.initials: Q
authors.lastname: Yang
mesh_terms: D004058:Diffusion; D009862:Online Systems; D012722:Sewage / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D013997:Time Factors; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D012722:Sewage; D012987:Soil; D055549:Volatile Organic Compounds