碩士 / 中華大學 / 土木工程學系碩士班 / 103 / The purpose of sewage treatment is to reduce the concentration of pollutants in sewage to make its effluents to comply with National Discharge Standards, Taiwan Environmental Protection Agency and not to cause secondary pollution. The quality in design of sewage treatment plant has strong impact on treatment efficiency and stabilization, and the costs of plant set-up and operating. However, domestic wastewater treatment plant design practice is often not based on the functional design, mainly because of the lack of experimental data as a basis for the design parameters during the various stages of the plant development. In tertiary treatment processes, wastewater containing nutrients: nitrogen, phosphorus and trace elements, which are required for algae to growth. Many research found algae could be used in production of bio-fuels, fertilizers, nutrition products, fish and animal feed, and cosmetics as well as the wastewater treatment as Taiwan green industries was prosperously developed in recent years. Therefore, this study will establish the criteria for sewage plant functional design, and discuss the design and operation in the application of the proposed algae to the tertiary treatment.
This study clearly illustrates the theoretical basis of the functional design in each treatment unit and recommend the proper mode of operation. Also with the settling tests and dynamic simulation for equalization tank, the case study was used for illustration of sewage whole plant design and for the required size of the reactor / equipment. The results show that under national discharge standard and the three principles of energy conservation, reduction of resources, saving space, the maximum efficiency of treatment equipment can be achieved.
In application of algae in design of tertiary treatment, the wastewater from a pig farm was treated under the conditions of 5000-lux light intensity and continuous aeration rate of 1200 mL/min. The results show that the removal efficiency of nutrient sources such as NO3-N, NO2-N, NH4+-N, and PO4-P in a batch test in five days of incubation time were 29.4%, 97%, 98.3%, 73%, respectively, indicating it can effectively remove the nutrients in tertiary treatment without the traditional design problem in poor removal efficiency for adding chemicals to removal of the nitrogen and phosphorus.
| Identifer | oai:union.ndltd.org:TW/103CHPI5015058 |
| Date | January 2015 |
| Creators | CHENG,YU-CHUNG, 鄭有中 |
| Contributors | Sz-Chwun Hwang, 黃思蓴 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 77 |
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