Uncertainties of spectral in situ measurements in wastewater using different calibration approaches

被引:42
|
作者
Rieger, L.
Langergraber, G.
Siegrist, H.
机构
[1] Ecole Polytech, Dept CGM, Montreal, PQ H1V 1B3, Canada
[2] Univ Nat Resources & Appl Life Sci, Inst Sanitary Engn & Water Pollut Control, BOKU, A-1190 Vienna, Austria
[3] Swiss Fed Inst Environm Sci & Technol, EAWAG, CH-8600 Dubendorf, Switzerland
关键词
calibration; in situ sensor; uncertainty; UV/VIS spectroscopy;
D O I
10.2166/wst.2006.421
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Three calibration methods were applied to UV/VIS spectra recorded in the influent of six wastewater treatment plants (WWTPs) to measure total COD (CODtot), filtered COD (CODfil), nitrate and nitrite nitrogen (NOx-N) and total suspended solids (TSS). It could be shown that a calibration of the sensor using data sets from four Swiss WWTPs leads to an improvement of the precision in comparison to the global calibration provided by the manufacturer. A calibration to the specific wastewater matrix always improves the results and gives the highest accuracy. For CODtot a mean coefficient of variation CVx of 12.5% could be reached, whereas for NOx-N only weak results were achieved (average CVx = 36%).
引用
收藏
页码:187 / 197
页数:11
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