Demonstration Engineering Research on Constructed Wetland for Purifying Urban Wastewater

Under the conditions that HRT is 4d without any measures to strengthen the system, after adding enhanced phosphorus removal materials,the system effluent TP removal efficiency increased by an average of about 8.36%; he system total nitrogen concentration with the flow direction of the wetlands has shown a downward trend, the concentration of ammonia nitrogen in the system in addition to hydrolysis at the second point is the point to increase the pool of water , the rest remain the same as the concentration of TN system flow direction showing a downward trend; the concentration of organic matter in sewage along the flow direction showing adecreasing trend, the first and the second paragraph of wetlands plays a major role to removal the concentration of organic matter, in addition to amount of 72.78% removal of total organic matter concentration.