|Abstract: ||應用研究, 研究期間 9509-9512, 研究經費 450仟元|
In order to upgrade the water quality of public water supply and safe guide public health, the regulation on finished water turbidity will become more stringent in the future. For water treatment plant with conventional coagulation, sedimentation, and filtration processes, the filtrate turbidity is strongly depended on the pretreatment of coagulation and sedimentation. In this project, the Wu-San-Toe Water Treatment Plant is the target of study. The effect of raw water quality and the operational parameters of coagulation on (1) floc characteristics such as size distribution and zeta potential, (2)the removal mechanism on high rate settler and rapid sand filter, (3)the filtrate quality and head loss accumulation, will all be investigated. First, the relevant literature will be searched. The previous raw and finished waters quality and operational parameters of the Wu-San-Toe Water Treatment Plant will be collected and analyzed. Then in various stages, the raw water will be collected, and jar tests conducted in the lab. In the field, the water samples from raw water inlet, the outlets of rapid mixing, flocculation, sedimentation, and rapid sand filtration basins will be collected. The turbidity and floc characteristics of samples, such as size distribution, zeta potential, and shape, will be analyzed. Identification and enumeration of algal cells on some of samples will be conducted. The head loss accumulation of the rapid sand filter under various conditions will also be recorded. All the data collected will be analyzed and evaluated. Then the optimum operational strategy will be proposed for generating stable and good quality finished water.