title: Measurements of wastewater true color by 4/6 wavelength methods and artificial neural network.
abstract: The ADMI (American Dye Manufactures' Institute) 3 and 31 wavelength (WL) methods are the most popular measurements of the wastewater true color. However, significantly different measured results were found between the ADMI 3 and 31 WL methods for the same sample. This finding indicates that the ADMI 3 and 31 WL values should not be directly substituted for each other, resulting in the incomparability of these two color values. An innovative calculation using the Back-Propagation Neural Network (BPN) was therefore proposed to replace the original calculation method proposed in Standard Method. The BPN-calculated ADMI 3 WL values were found to be very close to the corresponding measured ADMI 31 WL values. Additionally, for more accurate measurement of the true color, new measurement methods containing 4 and 6 wavelengths were proposed and cooperated with the BPN calculation model. The new approaches performed very accuracy measured results of the wastewater true color. Finally, the trained BPN calculation models were built to be applied to measure the true color of real textile samples and also performed very good measured results.
authors.affiliation: Department of Safety, Health and Environmental Engineering, National United University, Miao-Li, 360, Taiwan, ROC. rfyu@nuu.edu.tw
authors.forename: Ruey-Fang
authors.initials: RF
authors.lastname: Yu
authors.forename: Ho-Wen
authors.initials: HW
authors.lastname: Chen
authors.forename: Wen-Po
authors.initials: WP
authors.lastname: Cheng
authors.forename: Mei-Ling
authors.initials: ML
authors.lastname: Chu
mesh_terms: D003116:Color; D004396:Coloring Agents / Q000032:analysis; D016571:Neural Networks, Computer; D013053:Spectrophotometry; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical