Identification of odorous compounds in reclaimed water using FPA combined with sensory GC-MS
Zhiming Yan
,
Yu Zhang
,
Jianwei Yu
,
Hongying Yuan
,
Min Yang
DOI:10.1016/S1001-0742(10)60629-8
Received October 31, 2010,Revised March 22, 2011, Accepted , Available online
Volume 23,2011,Pages 1600-1604
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.
