title: Identification of odorous compounds in reclaimed water using FPA combined with sensory GC-MS.
abstract: Odorous compounds in the influent of a reclaimed water treatment plant (RWTP), consisting of coagulation, sedimentation, continuous micro-filtration (CMF), and chlorination in succession, in a north China city, were identified by combining flavor profile analysis (FPA) with sensory gas chromatograph-mass spectrometry (GC-MS). The sewery/swampy/septic odor with an odor intensity of 6.4 was found to be the major odor group in the RWTP influent, and the existence of well-known odorant including dimethyl disulfide, dimethyl trisulfide, indole and skatole were confirmed using GC-MS. The result of a spiking test showed that the intensity (3.6) of the sewery/swampy/septic odor caused by these four chemicals contributed to over 50% of the odor intensity of the influent. The FPA intensity for sewery/swampy/septic odor in the RWTP effluent was 3.8, showing that the treatment process was not efficient for the removal of odorants, particularly indole and skatole.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Yanzhiming.77@163.com
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Yan
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jianwei
authors.initials: J
authors.lastname: Yu
authors.forename: Hongying
authors.initials: H
authors.lastname: Yuan
authors.forename: Min
authors.initials: M
authors.lastname: Yang
mesh_terms: D002681:China; D004220:Disulfides / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D007211:Indoles / Q000032:analysis; D009812:Odorants / Q000032:analysis*; D012621:Seasons; D012862:Skatole / Q000032:analysis; D052617:Solid Phase Microextraction / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D004220:Disulfides; D007211:Indoles; D014874:Water Pollutants, Chemical; C021181:dimethyl disulfide; D012862:Skatole