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1、TechnicalInnovationofLandTreatmentSystemsforMunicipalWastewaterinNortheastChinaPedospherel6(3):297-303,2006ISSN1002..0160/CN32—.1315/P@2006SoilScienceSocietyofChinaPublishedbyElsevierLimitedandSciencePressTechnicalInnovationofLandTreatmentSystemsforMunicipalWastewaterinNortheastChinaZHOU
2、Qi—Xing,一.ZHANGQian.Ru.,andSUNTie—Heng,.ShenyangKeyLaboratoryofEnvironmentalEngineering,ShenyangUniversity,Shenyang110010(China).E-mail:Zhouqixing2OO3@yahoo.comCollegeofEnvironmentalScienceandEngineering,NankaiUniversity,Tianjin300071(China)KeyLaboratoryojTerrestrialEcologicalProcesslIns
3、tituteofAppliedEcology,ChineseAcademyofScienceslShenyang110016(China)GraduateSchooloftheChineseAcademyofSciences,Beijing100039(China)(ReceivedOctober3,2005;revisedJanuary16,2006)ABSTRACTOnthebasisofecologicalprinciplesincludingholisticoptimization,cyclingandregeneration,andregionaldiffer
4、en-tiation,landtreatmentsystems(LSs)formunicipalwastewaterwerecontinuouslyexploredandupdatedinthewesternShenyangareaandtheHuolinhearea,China.Intensifiedpretreatment,additionofaman-madesoilfiltrationlayer,anduseofanecologicallydiversifiedsecondaryplantcoverwereprovedtobetechnicallyfeasibl
5、e.Hydraulicloadingvca8de_terminedaccordingtotheassimilationcapacityofsoilecosystems,thusensuringsafeoperationofwastewatertreatment.Thismodernizedandalternativeapproachtowastewatertreatmenthadbeenwidelyappliedinmiddle-sizedandsmallcitiesandtownsofNortheastChina,andtheseinnovativesystemsin
6、someareashadindicatedfavorableecologica1.social,andeconomicbenefits.KeyWords:landtreatmentsystem,municipalwastewater,soilecosystem,soilpurificationINTRODUCTIONWiththedevelopmentofruralurbanizationandindustrializationalongwiththeimprovementofpeople'slivingstandardinChina,theoutputofwastew
7、aterhascontinuouslyincreased(Wangeta1.,2000;Zhangeta1.,2003;Jiaeta1.,2005).F0rexample,municipalwastewaterinChinaexceeded3.5×100m0in1997(Suneta1.,1997)andisestimatedtobecome6.5×100m3in2010.InLiaoningProvinceofNortheastChina,theannualdischargeofwastewaterin2004wasashighas2.
