| Summary: | 碩士 === 淡江大學 === 水資源及環境工程學系 === 88 === The object of this study is to review the master plan of Taipei county municipal sewage system from water quality and implementation revenue aspects. The WASP model is used as water quality model while LINDO is used as linear programming tool for this study. The review process is to propose alternatives with different sewage capacity and allocation other than original planning by CTCI. The alternatives then were checked by WASP model to verify their contribution to water quality of the Tam-Shui river basin and the corresponding construction and operation cost. After the analysis, a new optimal alternative was proposed.
There are three proposed alternatives in this study.
Alternative 1: The secondary treatment capability of Shu-Lin sewage treatment plant is considered to be upgraded to advanced treatment capability to improve the water quality of the worst section of the basin.
Alternative 2: Cancel the Pau-Shen sewage plant because of its small capacity and potential resistance to obtain the plant site. Its sewage was considered to combined with Pan-Chou sewage plant.
Alternative 3: Cancel the sewage treatment plants which are located along with the existing main sewage pipe such as Pan-Shin and Shan-Sha sewage plants. Their original capacity then were considered to transport to a further down stream location through the existing main pipe.
After the analysis of the above alternatives through the water quality concern and cost for construction and operation, a combination alternative was proposed and reviewed.
This study concluded the following results：
1. The upgrade of secondary treatment sewage plant to more advanced treatment capability is not a economical solution to improve local water quality. Since the cost to upgrade existing sewage plants is enormous and the corresponding water quality improvement is very limited.
2. The cancellation of Pau-Shen sewage plant does not affect the water quality too much when compared with original alternative proposed by CTCI. When the potential resistance do occurred, the alternative 2 may be considered.
3. The improvement of water quality for alternative 3 is similar to the original alternative but requiring much less cost. However, there is a piping embed engineering problem needs to be conquered.
4. The proposal that combines the advantages of the above three proposals was reviewed and do provide better water quality and less construction and operation cost.
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