A procedure for the on-line measurement of concentrations of toxins in wastewater using spectrophotometric data is proposed. The complete absorbance spectrum of a wastewater sample is used to predict the concentrations of all possible substances within. Two techniques are examined. In nonlinear spectral deconvolution, the spectrum is decomposed as a linear combination of base spectra and the coefficients of this deconvolution are used to nonlinearly estimate the concentrations. Under partial least squares analysis, the concentrations are directly estimated as a linear combination of the measured spectrum data. Both techniques show good results for estimating the kinetics of samples taken during the reaction phase in a laboratory anaerobic/aerobic SBR used for p-nitrophenol biodegradation.
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Research Article|
February 01 2006
On-line concentration measurements in wastewater using nonlinear deconvolution and partial least squares of spectrophotometric data
A. Vargas;
1Environmental Bioprocesses Dept, Institute of Engineering, UNAM, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán D.F., 04510 Mexico
E-mail: avargasc@iingen.unam.mx
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G. Buitrón
G. Buitrón
1Environmental Bioprocesses Dept, Institute of Engineering, UNAM, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán D.F., 04510 Mexico
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Water Sci Technol (2006) 53 (4-5): 457–463.
Citation
A. Vargas, G. Buitrón; On-line concentration measurements in wastewater using nonlinear deconvolution and partial least squares of spectrophotometric data. Water Sci Technol 1 February 2006; 53 (4-5): 457–463. doi: https://doi.org/10.2166/wst.2006.150
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