A novel subsurface flow constructed wetland system used in anvanced wastewater treatment for nutrient removal in a cold area

作者：Pang, Changlong; Li, Ang^*; Qiu, Shan; Wang, Li; Yang, Jixian; Ma, Fang^*; Ren, Nanqi

来源：Bulgarian Chemical Communications, 2015, 47: 173-178.

• Constructed wetland
• Horizontal subsurface flow
• Nutrient Removal
• Cold areas

Due to the limitations of a cold climate to a conventionally constructed wetland system(CWS) during anual operation, a new type of compound double-layer subsurface flow wetland system was developed. A full-scale test trial of this system has been operated in the Northeast of China, which was used for advanced sewage treatment. By increasing the depth of the wetland structure, setting down insulating material layers, filling with a high-efficiency compound substrate and using the bioaugmentation technology. The purification efficiency and the operational stability of this CWS has been effectively improved. The new type of double-layer subsurface flow of the CWS still showed a high purification capacity for organic matter in the winter. It was hard to obtain a high purification effect for the ammonia with the wetland system in winter because of the limitation of nitrification at low temperatures, but the system had a significant effect in denitrification and nitrate-nitrogen removal. The compound substrates provide a high performance of the system in Total Phosphorus (TP) removal.

• 出版日期2015
• 单位哈尔滨工业大学; 城市水资源与水环境国家重点实验室