Application of using surface constructed wetland for removal of chemical oxygen demand and ammonium in polluted river water

作者：Wu Haiming; Li Weijiang; Zhang Jian; Li Cong; Zhang Jinyong; Xie Huijun

来源：Desalination and Water Treatment, 2012, 44(1-3): 142-150.

DOI：10.5004/dwt.2012.2974

• Constructed wetland
• Polluted river treatment
• COD
• Ammonium
• First-order removal
• Vegetation

River water was mostly polluted in northern China in the past decades and the major contaminants were organic matter and ammonia. In this study the performance of the pilot-scale and full-scale surface constructed wetlands for removing COD (chemical oxygen demand) and ammonium from polluted river water was evaluated. Results showed that the effluent COD and NH4+-N concentrations in the pilot scale wetland systems were 10.72 similar to 19.34 mg l(-1) and 0.18 similar to 0.90 mg l(-1), respectively, which met Grade-III (COD 20 mg l(-1), NH4+-N 1 mg l(-1)) of national surface water standards in China. The maximal COD and NH4+-N removal efficiency was 96.18% and 99.78%. COD and NH4+-N removal in spring and summer were better than that in fall and winter based on the k-C* model. Combined with research results of the two-year full-scale study, it indicated that the surface wetland system was a promising technology for treating polluted river water to meet the requirement of Grade-III water quality in northern China.

• 出版日期2012-6
• 单位山东大学; 青岛理工大学