The phosphorus removal efficiencies of two different subsurface flow constructed wetland systems in treatment of swine wastewater were compared.The results showed that when the influent loading rate was 0.02 m3/(m2 · d),the horizontal subsurface flow constructed wetland (HSSF) and vertical subsurface flow constructed wetland (VSSF) both showed high and stable phosphorus removal ability,and the average removal rates of TP were 88.41％ and 95.71％,respectively.The adsorption and sedimentation of substrates including red soil,oyster shell and broken bricks played a major role in phosphorus removal during the experimental period,whereas plants and microorganisms could influence phosphorus removal rates indirectly by influencing other conditions of CWs.The phosphorus intercepted in the two CWs had different spatial distribution characteristics.The high content of inorganic phosphorus in total phosphorus also showed that adsorption and sedimentation of substrates played a major role in phosphorus removal.Compared with HSSF,VSSF was more effective in removing phosphorus from swine wastewater due to its better design of structure.
NETL
NSTL
维普
万方数据
