Electronic tongue and nose sensor coupled with fluorescence spectroscopy to analyze aesthetic water quality parameters in drinking water distribution system

Abstract

In this study, a new method is proposed for the evaluation of taste and odor of drinking water quality in water distribution systems by means of objective and quantitative indices derived from electronic sensors and fluorescence spectroscopy analysis. This method can be analyzed easily, quickly, and instead of subjective sensory analysis. Taste index (T.I.) and odor index (O.I.) were derived using an electronic tongue and nose. This method is simpler, faster, and less expensive than human panel methods. The tryptophan-like fluorescence index (TLF-I) and pipe deterioration index (PDI) of the water distribution system, derived from fluorescence spectroscopy, were also calculated to determine if the T.I. and O.I. were high or what was causing the difference. The target of comparison was the final water (point 1) that supplies water, and T.I., O.I., TLF-I, and PDI were calculated for the seven sampled points. Points 5 (3.91), 3 (3.82), and 6 (3.66) observed high T.I. O.I. was highest in the order of points 6 (3.65), 3 (3.16), and 5 (2.51). High TLF-I was observed at points 5 (160), 3 (111), and 6 (89), indexing a solid correlation. Other influencing factors at points 5, 3, and 6 included the PDI and water supply of the reservoir type. Point 5 had the highest PDI of 0.47. These results suggest that TLF-I and PDI can serve as indicators for interpreting the causes of changes in T.I. and O.I., which are indicators of aesthetic water quality. This method can assist in managing taste and odor quality data in drinking water distribution networks.