The Dapeng Bay National Scenic Area will be planned as an interna-tional level tourism site. In order to improve the water quality in bay area, the administration authority has removed oyster farm. However, sewage and aquaculture wastewater from the communities and fish ponds around the bay area were still discharged continuously. After careful assessment, The Dapeng Bay National Scenic Area Administration authority decided to use constructed wetlands to treat such kinds of wastewater.
In this study, the treatment efficiencies of Datan Constructed Wetland Park were investigated. According to the experimental results, we found that the remove efficiencies of SS, Chl-a, and TOC were not good enough, while the other parameters, such as OP, TP, NO2-, and NO3- their all re-moval efficiencies were all above 40¢H.The removal efficiencies of NH3, TKN and TN were all above 60%. However, the removal efficiencies of turbidity and BOD were found equal to 30%. Generally, TN was removed by the process as of nitrification and denitrification, but the nitrification of the subsurface flow¡]SSF¡^part of wetland was perforated worse, which caused the org-N and NH4+-N was not availably to become the NH3, NO2- and NO3-. Because of this reason, the removal effect of Org-N was not very significant.
The parameter of TOC was affected by the fixation of CO2 through photosynthesis of autotrophs, and the respiration and denitrification of heterotrophs. The sediment also could provide organic carbon source for denitrification. Photosynthesis and carbon source would cause the re-moval efficiency of TOC become worse than synthesis. In the wetland, the decrease rate of salinity was found above 20¢H.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0610108-165821 |
| Date | 10 June 2008 |
| Creators | Wu, Cheng-Ying |
| Contributors | Wen-Chien Kuo, Lei yang, C. M. Kao |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0610108-165821 |
| Rights | restricted, Copyright information available at source archive |
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