Dissertation
Dissertation > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization

The Study of Distribution Regularities of Pullutants in Sediments from Downstream Area of a WWTP in Three Gorges Reservoir Area

Author HeYing
Tutor ZuBo
School Chongqing Jiaotong University
Course Architecture and Civil Engineering
Keywords Three Gorges Reservoir Region sediment heavy metal TotalNitrogen Total Phosphorus Ammonia Nitrogen
CLC X703
Type Master's thesis
Year 2013
Downloads 12
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The form of the TGR would change the flowing rule of current and the flowing rule of sand, which would change the existing form and the space-time distributing rule of contamination in TGR. Accordingly, the viewpoint that sand exert effect on the environment of water body has been considered in this study. In this study, The external environment factors such as pH, temperature, dissolved oxygenare areconsidered to discuss the potential of eutrophication in Chongqing region of TGR. Discuss the three gorges reservoir area in chongqing section of the Ji Guan Shi sewage treatment plant downstream of pollutants in sediment distribution. There are several important aspects in the main study outcome:①Based on the abroad collected data and study of water sampling, Research of environmental factors such as pH、temperature、Dissolved Oxygen influence the distribution of heavy metals such as Copper、Zinc and inorganic pollutant such as Total Nitrogen、Total PhosphorusAmmonia Nitrogen in the downstream sediment of the Ji Guan Shi sewage treatment plant. The results show that, With increasing distance from the outfall, Copper and Zinc content in the sediment is given priority to with constantly decreasing。This is mainly caused by water flow and the interference of surface, it makes the surface sediment suspension into the overlying water; Total Nitrogen Total Phosphorus and Ammonia Nitrogen content in the sediment is given priority to with constantly increasing。This is mainly due to the concentration difference between overlying water and sediment concentration。②Through indoor experiment, study at the same speed with the passage of time, Sewage treatment plant downstream section of suspended sediment influence the Adsorption-desorption of heavy metals such as Copper、Zinc and inorganic pollutant such as Total Nitrogen、Total Phosphorus、Ammonia Nitrogen。The results show that, at the speed of150r/min, with the passage of time the release of Copper、Zinc quantity are small, the release of Total Nitrogen、Total Phosphorus、Ammonia Nitrogen quantity are large。at the speed of200r/min, with the passage of time the release of Copper Zinc and Total Nitrogen、Total Phosphorus、Ammonia Nitrogen quantity are large。The release rate showed a trend of first up then down。 ③Through indoor experiment, study at the different speed, Sewage treatment plant downstream section of suspended sediment influence the Adsorption-desorption of heavy metals such as Copper、Zinc and inorganic pollutant such as Total Nitrogen、 Total Phosphorus、Ammonia Nitrogen。The results show that, with the increase of rotational speed, the release of all pollutants quantity are to present the change trend of increase Speed increase from50r/min to350r/min, the release rate of pollutants are present process from small to big and smaller。④In existing one-dimensional carrying water quality mathematical model as the prototype。With proper correction and improvement, get in line with the mathematical model of the test conditions。Matching test were conducted on Model calculation values and The measured average value, According to the results, the model calculated values and the measured average had no significant difference, have higher fitting degree and good matching。

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