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Water Res

Title:		The electronic nose as a rapid sensor for volatile compounds in treated domestic wastewater
Author(s):		Dewettinck T; Van Hege K; Verstraete W;
Address:		"Laboratory for Microbial Ecology and Technology, Ghent University, Belgium"
Journal Title:		Water Res
Year:		2001
Volume:		35
Issue:		10
Page Number:		2475 - 2483
DOI:		10.1016/s0043-1354(00)00530-3
ISSN/ISBN:		0043-1354 (Print) 0043-1354 (Linking)
Abstract:		"An electronic nose consisting of 12 metal oxide sensors was used to monitor volatile compounds in effluent of a domestic wastewater treatment plant. Effluent and reference (deionized water) samples were heated to 60 and 90 degrees C to promote the volatilization and to increase the sensitivity. An effluent measuring campaign of 12 weeks was conducted and the repeatability and reproducibility of the procedure and the apparatus were determined. Processing the obtained fingerprints with principal component analysis (PCA) allowed interpretation and differentiation of the samples in terms of origin and quality, relative to the reference. To minimize the variance due to sensitivity fluctuations of the apparatus and to detect effluents with deviating qualities, two new concepts were defined, i.e. the relative sensorial odour perception (in short: rSOP) and the relative fingerprint. Correlations between the relative overall electronic nose output, expressed as rSOP, and selected routine parameters were weak except for the parameter 'volatile suspended solids' (VSS), indicating adsorption of volatile organic compounds (VOCs) onto the organic particles. The results clearly demonstrate the possibility to use the electronic nose as a rapid alarm generator towards volatile compounds, e.g. in specific advanced treatment processes to produce reclaimed water from effluent of the domestic wastewater treatment plant under scrutiny"
Keywords:		"Adsorption Belgium *Biosensing Techniques Electronics Hot Temperature Metals/analysis Models, Chemical Models, Statistical Odorants/analysis Organic Chemicals/*analysis Oxides/analysis Reference Standards Reproducibility of Results Volatilization Waste Di;"
Notes:		"MedlineDewettinck, T Van Hege, K Verstraete, W eng Research Support, Non-U.S. Gov't England 2001/06/08 Water Res. 2001 Jul; 35(10):2475-83. doi: 10.1016/s0043-1354(00)00530-3"