Keywords Secondary effluent;Nitrogen;Phosphorus;Steel slag through magnetic separation;Peat;Sedum alfredii Hance;Beta vulgaris var cicla;Azolla filiculoides lanm.;Combined ecological system;

• 二级出水;氮;磷;沸石;脱磁钢渣;泥炭;东南景天;红叶甜菜;满江红;组合式人工生态系统;