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Gewählte Publikation:

Rieger, L; Langergraber, G; Thomann, M; Fleischmann, N; Siegrist, H.
(2004): Spectral in-situ analysis of NO2, NO3, COD, DOC and TSS in the effluent of a WWTP.
Water Sci Technol. 2004; 50(11):143-152

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.
Autor*innen der BOKU Wien:
Langergraber Günter
Find related publications in this database (using NML MeSH Indexing)
Algorithms -
Calibration -
Carbon - analysis
Environmental Monitoring - methods
Nitrates - analysis
Nitric Oxide - analysis
Nitrites - analysis
Nitrogen - chemistry
Signal Processing, Computer-Assisted - chemistry
Spectrophotometry - chemistry
Waste Disposal, Fluid - instrumentation
Water - instrumentation
Water Pollutants - analysis
Water Pollutants, Chemical - analysis
Water Pollution - analysis
Water Purification - analysis

Find related publications in this database (Keywords)
in-situ sensor

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