摘要(英) |
The components in the wastewater contain dissolved substances and non-soluble substances. These kinds of substances is the main item used to judge the water quality. The current water quality testing methods are mostly based on traditional manual testing methods, but the sampling and testing analysis procedures are time-consuming and the water concentration cannot be obtained in time. In order to provide timely and effective information on water treatment system control, establishment of instant wastewater quality monitoring method with optical spectrum has the advantages of rapid measurement and no need for additional chemicals, which can effectively solve the traditional measurement problems. This study is focused on the concentration of the total suspended solids, total dissolve solids, chemical oxygen demand and nitrate. Used PCA with multiple regression and ANN to estimating the concentration of substances in wastewater. Estimating the concentration of TSS, TDS, TCOD and dissolved COD by multiple regression results are as follows:the average relative difference of TSS is 8.38 %, TDS is 15.53%, TCOD is 16.29% and the absolute difference in dissolved COD is 1.57, total nitrate is 0.76, dissolved nitrate is 0.49. As for the concentration estimation model established by the ANN is slightly worse than the concentration estimation formula of multiple regression analysis, but the estimated result is still within the acceptable range. And its advantage is that can be obtained TSS, TDS, TCOD, dissolved COD, total nitrate and dissolved nitrate at the same time to achieve rapid measurement concentration in wastewater. |
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