碩士 / 國立中興大學 / 環境工程學系所 / 101 / For decades in Taiwan, economics and population of metropolitan areas have grown rapidly. It brought not only economic benefits but also many environmental problems. However, water pollution prevention and management are not effective, because there are many small and medium sized enterprises (SMEs) small factories in remote areas in Taiwan. In order to reduce costs of clearance and disposal of wastes and wastewaters, some unscrupulous manufacturers then illegally discharged wastewater, which resulted in environmental deterioration and impact, and unestimated costs for subsequent treatment.
According to the statistics calculated by the end of year 2012 from Construction and Planning Agency Ministry of the Interior (CPAMI), the served rate of public sanitary sewers reaches 32 % ; the served rate of specialized sanitary sewers reaches 15 %; the installation rate of building''s sewage facilities reaches 16 %, and the total sewage treatment rate is 63 %. It’s obvious that most domestic wastewater discharged directly into water bodies without any treatment.
Because the construction of public sanitary sewers and household connection-pipes takes long time, we also use On-site Treatment for wastewater purification, which can temporarily reduces demands on wastewater collection and treatment systems.
This study, taking Tamsui river for instance, aims to explore the relationship between river water quality and public sewer popularization, and to compare artificial wetlands with public sewers. Tamsui river basin contains four watershed tributaries, including Keelung River, Xindian River, Han River, and Tamsui River. Up to the end of year 2012, the popularization rate of public sewers in Taipei City has reached 100 % as 50 % in New Taipei City. With the rising rate of household pipe-connection, the river sewage pollution would effectively decrease while dissolved oxygen increase and river water quality can be improved.
Artificial wetland, which is an ecological engineering method with advantages of energy-saving, low cost, simple operation, and easy maintenance, can be developed and applied in wastewater treatment with limited energy consumption. The sites for artificial wetlands are mostly located in remote area with limited public sewers, whose benefits are on-site treatment for sewage, effective imitation of natural water purification, and inexpensive costs while the disadvantages are time-consuming sewage biolysis and needs for vaster lands so that it’s hard to be applied in densely populated urban area. If we can plan some suitable places for artificial wetlands in countryside, such as park reserved lands and lower-rent fallow lands, we will cut down construction costs and reserve water resources; also, wetlands can offer multiple purposes, like landscape, resting, ecological education, etc.
| Identifer | oai:union.ndltd.org:TW/101NCHU5087045 |
| Date | January 2013 |
| Creators | Hsing-Yi Lin, 林欣怡 |
| Contributors | 盧至人 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 104 |
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