Based On The3D Fluorescence Spectra Of Sewage Treatment Plant Water Quality Quick Analysis

With the rapid development of national economy and the urban population, a large amount of expanding urban sewage directly into urban wastewater treatment plant. Wastewater treatment conditions influence the monitoring level. The traditional inlet water and outlet water wastewater analysis needed to using standard chemical method of completion, it is time-consuming, arduous, monitoring low frequency. Fluorescence method has good selectivity, high sensitivity, the detection speed, no chemical reagent. Carry out water pollution fluorescence detection technology research, development quick high sensitive for the water pollution on-line monitoring equipment lay the foundation.This paper base on the three-dimensional fluorescence spectral characteristics based on the study of three-dimensional fluorescence characteristics of the in and out water of the urban sewage treatment plants, and different environmental factors on the characteristics of three-dimensional fluorescence, And this study based on fluorescence intensity, spectral composition and chemical indicators of the scores of the linear relationship. Hope that through this study, for the further use of3DEEM line monitoring technology out of the water quality of sewage treatment plants to provide theoretical basis. The main results are as follows:(1) The results indicate that urban sewage has four fluorescence area,1and2fluorescent center of the import sewage water is obvious,3and4Fluorescence center is not obvious, four fluorescence district of the export water was quite obvious. Combining PARAFAC, the soluble organic of the import sewage water that contains three sure fluorescence composition, the export sewage water contains three main fluorescence components.(2) Solution as the acidic conditions, the fluorescence peak intensity as the pH value of the larger increases. Continue to increase the pH value, the solution of the fluorescence intensity.Humic fluorescence peak and protein fluorescence peak showing in different concentrations with the increase of pH, have shown "red shift" of the trend. Protein water changing trends in the fluorescence intensity is the intensity with enhancement of ionic strength.(3) The fluorescence intensity of water has a good linear relationship between the ammonium nitrogen, nitrate, total nitrogen, COD and BOD5, which is significantly associated with ammonium and I225/340, I230/430, r values Were0.585,0.498; TN with1225/340,1230/430the correlation coefficients are0.533,0.770. Ammonium respectively and I225/340, I230/430, TN have been fitted for multiple significant correlation, linear coefficients were0.450,0.596.(4) And the fluorescence intensity of the water a good linear relationship between the ammonium nitrogen, total nitrogen, COD, nitrate and TOC. Which are associated with the dominant ammonium and I225/3400(r=0.771), total nitrogen and I230/430(r=0.503), ammonium nitrogen and total nitrogen were carried out on the multi-fitting results for the linear Correlation, R2, respectively0.6,0.432.(5) Center out of the water of the three-dimensional fluorescence intensity I225/340and I230/430municipal sewage can be used to ammonium nitrogen and total nitrogen analysis and real-time online monitoring, so as to achieve rapid monitoring and time-saving purposes.(6) Scores of the spectral components of water and water of the total nitrogen, ammonium and nitrate to good linear correlation, influent total nitrogen and water of the humic tryptophan and the scores of the R2reached0.72, the influent ammonium and tryptophan, tyrosine and humic type fitted with a significant correlation, R2is0.32. However, there is no water and the fluorescent component in addition to BOD5good linear correlation of chemical indicators.