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Widely application of CWs (Constructed Wetlands) in domestic wastewater treatment of China is developing wetlands into a multi-function wetland system. Wetland center in CAMIP (Changshu Advanced Materials Industrial Park) (Suzhou, Jiangsu Province, China) successfully improved tail water quality to level IV of Environment Quality Standards for Surface Water (GB3838-2002) by the combination of different CW steps and achieved water reuse in CAMIP for industrial purpose. Different from traditional tail water advanced treatment, wetland center is designed under the principle of combining landscape and ecological treatment technology. Since this center started running, the removal rate of TN (Total Nitrogen), NH3-N, TP (Total Phosphorus) and COD (Chemical Oxygen Demand) reaches 87%, 91%, 44% and 60% respectively. Also, 2,038,000 m industrial water reuse in 2015 and 2016 was achieved; emission reduction on COD, NH3-N and TN reached 100 t, 7.2 t and 15.2 t; an ecological garden that combines ecological wastewater treatment, wetland landscape, habitat renovation and educational functions was created.

Multi-function Research on Wetland Center for Chemical Industrial Park Water Reuse