ZHAI Jun,ZHAI Hao-chong,MA Hong-pu,et al.Mechanism of Phosphorus Removal from Domestic Sewage by Multi-stage Constructed Wetland[J].China Water & Wastewater,2020,36(21 21):75-79.
Mechanism of Phosphorus Removal from Domestic Sewage by Multi-stage Constructed Wetland
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
21 21
Page:
75-79
Column:
Date of publication:
2020-11-01
- Abstract:
- The removal of total phosphorus, particulate phosphorus, soluble inorganic phosphorus and soluble organic phosphorus from domestic sewage in a multi-stage constructed wetland was explored. The removal efficiency of total phosphorus per unit area of the wetland could stably reach 0.83-0.93 g/(m2·d), and the total phosphorus removal efficiency per unit area was significantly positively correlated with the total phosphorus concentration in the sewage. In the first stage wetland, 57% of total phosphorus was removed. By analyzing different forms of phosphorus in the influent and effluent of the wetland, it was found that better removal efficiency of particulate phosphorus and soluble inorganic phosphorus was achieved in the wetland. Particulate phosphorus and soluble organic phosphorus in sewage were mainly removed in the first stage wetland, while soluble inorganic phosphorus was removed in the second and third stage wetland. Therefore, cheap gravel could be selected as matrix in the first stage wetland, and matrix with better removal efficiency of inorganic phosphorus could be applied in the second and third stage wetland.
Last Update:
2020-11-01