Fuel park wastewater monitoring with UV-Vis spectra and partial least squares models

Abstract

In the context of the high application potentials for on-line and in-line measurements in wastewater quality monitoring, UV-Vis spectrophotometry has received recent attention. In the present work the development of Partial Least Squares (PLS) calibration models for the fast determination of parameters legally required at the discharge of a fuel park wastewater treatment plant was attempted using UV-Vis spectra and the corresponding standard analytical values. A PLS model was developed and validated for Chemical Oxygen Demand (COD) determination with 3.8 mg O2/l RMSEP (root mean squared error of prediction). The models developed for 5-day Biochemical Oxygen Demand (BOD5) and Total Suspended Solids (TSS) were validated (3.5 mg O2/l and 2.9 mg/l RMSEP, respectively), but presented some predictive limitations mainly attributed to the narrow interval of concentration values present in the original dataset.

Keywords

• uv-vis spectrophotometry
• wastewater monitoring
• partial least squares (pls)
• fuel park wastewater