两级逆向垂直潜流人工湿地去除营养物的性能研究_崔玉波

两级逆向垂直潜流人工湿地去除营养物的性能研究崔玉波1,余丹2,朱宝英2(1.大连民族学院环境工程系,辽宁大连116600;2.吉林建筑工程学院环境工程系,吉林长春130021)摘要:针对人工湿地同步脱氮除磷效果不佳及易滋生蚊蝇的问题,提出了两级逆向垂直潜流这一新的运行模式。合成污水经酸化预处理后依次流经两级湿地,当一级湿地的水力负荷为4.8～9.5cm/d、有机负荷为10～27gCOD/(m2d)时,其对COD的平均去除率约为70%;两级湿地对COD的总去除率>90%。NH+4-N主要是由二级湿地去除的,当氨氮负荷为1.32～2.32g/(m2d)时,一级湿地对NH+4-N的去除率甚至出现了负值,为-5.6%～9.7%;而在0.93～1.6g/(m2d)的负荷下,二级湿地获得了较高的NH+4-N去除率,为94%～100%。二级湿地内发生了明显的硝化/反硝化反应,硝化率和反硝化率分别为0.93～1.53gNH+4-N/(m2d)和0.47～0.79gNO-3-N/(m2d)。两级湿地对TN的去除率为38.2%～57%;在一、二级湿地的总磷负荷分别为(0.07～0.16)、(0.07～0.11)g/(m2d)的条件下,对TP的总去除率达到了97%以上。基金项目:建设部研究开发项目(04-2-067)关键词:人工湿地;污水处理;营养物去除;硝化;反硝化中图分类号:X703.1文献标识码:A文章编号:1000-4602(2007)15-0008-05StudyonPerformanceofTwo-stageInverseVerticalSubsurface-flowConstructedWetlandforRemovalofNutrientsCUIYu-bo1,YUDan2,ZHUBao-ying2(1.DepartmentofEnvironmentalEngineering,DalianNationalitiesUniversity,Dalian116600,China;2.DepartmentofEnvironmentalEngineering,JilinArchitecturalandCivilEngineeringInstitute,Changchun130021,China)Abstract:Aimedattheproblemsofthepoorefficiencyofsimultaneousphosphorusandnitrogenremovalandthebreedingoffliesandmosquitoesinconstructedwetlands,anewoperationmodeoftwo-stageinverseverticalsubsurface-flowwasputforward.Thesyntheticdomesticwastewaterwaspretreatedinanacidificationreactor.Inthefirst-stagewetland,whenHLRis4.8to9.5cm/dandOLRis10to27gCOD/(m2d),theaverageCODremovalrateisabout70%.ThetotalCODremovalrateinthetwo-stagewetlandisgreaterthan90%.NH+4-Nismainlyremovedinthesecond-stagewetland.Undertheconditionof1.32to2.32gNH+4-N/(m2d),theremovalrateofNH+4-Nis-5.6%to9.7%inthefirst-stagewetland.Whileundertheconditionof0.93to1.6gNH+4-N/(m2d),theremovalrateofNH+4-Nis94%to100%inthesecond-stagewetland.Theobviousnitrificationanddenitrification8第23卷第15期2007年8月中国给水排水CHINAWATER＆WASTEWATERVo.l23No.15Aug.2007takeplaceinthesecond-stagewetland.Thenitrificationanddenitrificationratesare0.93to1.53gNH+4-N/(m2d)and0.47to0.79gNO-3-N/(m2d),respectively.TheTNremovalrateis38.2%to57%inthetwo-stagewetland.TheTPremovalratereachesabove97%undertheTPloadingof0