An in-situ UV spectrometer was applied to the effluent of a WWTP in Switzerland and calibrated using a multivariate calibration algorithm based on PLS regression. Except for nitrite, the calibration was based on comparative measurements of the effluent in the plant laboratory. Samples made of stock solution added to three different matrices prepared in the EAWAG laboratory were used for the nitrite calibration because the effluent concentrations were always in the range of 0.06–0.26 mg/l. The results show very good precision for nitrite and nitrate. The measuring range for COD and DOC was not completely covered by the measurements, so the meaningfulness of the results is limited. Nevertheless the precision obtained for soluble COD is high enough for most applications at WWTPs. The accuracy of the TSS measurement is unsatisfactory as regards effluent limits since the spectrometer used does not cover the wavelength region up to 700 nm, which gives better signals for TSS calibration due to its strong correlation with turbidity.
Skip Nav Destination
Article navigation
Research Article|
December 01 2004
Spectral in-situ analysis of NO2, NO3, COD, DOC and TSS in the effluent of a WWTP Available to Purchase
L. Rieger;
1EAWAG, Swiss Federal Institute for Environmental Science and Technology Ueberlandstr. 133, PO Box 611, CH-8600 Duebendorf, Switzerland (E-mail: [email protected])
E-mail: [email protected]
Search for other works by this author on:
G. Langergraber;
G. Langergraber
2Institute of Sanitary Engineering and Water Pollution Control, BOKU – Univ. of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, A-1190 Vienna, Austria (E-mail: [email protected])
Search for other works by this author on:
M. Thomann;
M. Thomann
3BMG Engineering AG, Grammetstrasse 14, CH-4410 Liestal, Switzerland (E-mail: [email protected])
Search for other works by this author on:
N. Fleischmann;
N. Fleischmann
4hydrophil, Lerchenfeldergürtel 43, Top 6/3, A-1160 Vienna, Austria (E-mail: [email protected])
Search for other works by this author on:
H. Siegrist
H. Siegrist
1EAWAG, Swiss Federal Institute for Environmental Science and Technology Ueberlandstr. 133, PO Box 611, CH-8600 Duebendorf, Switzerland (E-mail: [email protected])
Search for other works by this author on:
Water Sci Technol (2004) 50 (11): 143–152.
Citation
L. Rieger, G. Langergraber, M. Thomann, N. Fleischmann, H. Siegrist; Spectral in-situ analysis of NO2, NO3, COD, DOC and TSS in the effluent of a WWTP. Water Sci Technol 1 December 2004; 50 (11): 143–152. doi: https://doi.org/10.2166/wst.2004.0682
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00