Treatment of campus wastewater by a novel construction solid waste (CSW) Based on Constructed Wetland System

摘要

In this article, a laboratory scale multi-stage constructed wetland system was studied for assessing the feasibility of using construction solid waste(CSW) as main substrate of reed bed systems. As a novel material, CSW demonstrated an excellent P removal performance with the P removal efficiency ranging from 96.2 to 99.9%. A tidal-flow operation strategy was also employed to enhance the wetland aeration, which would benefit both the organic pollutants decomposition and nitrification process. The average NH⁺4-N concentration was reduced from 33.20mg/L to 5.33mg/L. Organic matter removal also proved to be good, which reached the average 68.66%. The result showed the system had considerable capacity for both organic matter and nutrients. CSW as a low-cost media was demonstrated to be a promising substrate in constructed wetland system. More importantly, it indicated a novel reuse of CSW as medium of constructed wetland system, which provided a win-win approach to both CSW disposal and wastewater control.