Municipal wastewater treatment with pond-constructed wetland system: a case study. |
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| Authors: | X Wang X Bai J Qiu B Wang |
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| Affiliation: | School of Environmental Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Rd, Shanghai, 200240, China. xinzewang@sjtu.edu.cn |
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| Abstract: | The performance of a pond-constructed wetland system in the treatment of municipal wastewater in Kiaochow city was studied; and comparison with oxidation ponds system was conducted. In the post-constructed wetland, the removal of COD, TN and TP is 24%, 58.5% and 24.8% respectively. The treated effluent from the constructed wetland can meet the Chinese National Agricultural and Irrigation Standard. The comparison between pond-constructed wetland system and oxidation pond system shows that total nitrogen removal in a constructed wetland is better than that in an oxidation pond and the TP removal is inferior. A possible reason is the low dissolved oxygen concentration in the wetland. Constructed wetlands can restrain the growth of algae effectively, and can produce obvious ecological and economical benefits. |
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