| Analyzed the preliminary about wastewater reuse by constructed wetland ecology system, Studied the removal efficiency of six constructed wetland units with Acorus gramineus Soland, Canna chineresisw, Calla palustris, Rhododendron simsii, Aspidistra elatior and C h a m a e d o re a e l e g a n s to NH3-N and TP, the units inflow was from secondary effluent and the hydraulic residence times were from 1 to 7 days. The experiment results indicate that the removal rate is different for the six kinds of plants wetland system, but the collectivity variety trend in every system is similar with the lengthening of waterpower detention time. As there was no apparent difference between any of the species on NH3-N and TP removal, so plants could be chosen on their aesthetic merits in the process of wastewater reuse design.Then, studied the removal efficiency of vertical-flow and surface-flow constructed wetland to TN, TP and fecal coliform in different seasons, the constructed wetlands inflow was from secondary effluent and the hydraulic residence times were 2 days. The experiment results show that it is feasible to constructed wetland using in advanced treatment for secondary effluent, it can satisfy water quality standard for aesthetic environment use, especially for aesthetic watercourse and impoundment.At the base, researched the constructed wetland's aesthetic effect, based on the landscape actuality of SWUST, designed the constructed wetland wastewater reuse technology for the secondary effluent reusing in landscape water. The conclusion can be gotten through analysis that there are more advantages to building the constructed wetland system in current landscape, such as advanced treatment for secondary effluent, satisfaction water quality standard for aesthetic environment use, constructing college landscape, saving the field and investment to building general advanced treatment equipment, and so on.
|
PDF Full Text Request