生物_生态协同工艺深度处理城市污水_陈秀荣

第40卷第4期2008年4月哈尔滨工业大学学报JOURNALOFHARBININSTITUTEOFTECHNOLOGYVol.40No.4Apr.2008生物-生态协同工艺深度处理城市污水陈秀荣1,周琪2,张杰3(1.华东理工大学资源与环境工程学院,上海200237,E-mial:irene-chen@126.com;2.同济大学环境科学与工程学院,上海200092;3.哈尔滨工业大学市政环境工程学院,哈尔滨150090)摘要:为实现碳源含量低、营养盐含量高的城镇污水高效、低耗地脱氮除磷,提出以生物、生态协同组合模式脱氮除磷.试验规模为100m3/d,其中生物段为悬浮式活性污泥系统,生态段为人工湿地和稳定塘的串联系统.根据进水特征和单元工艺的特性调节单元工况类型和运行参数,合理分配两段污染物负荷,协同组合两段工艺,达到生物段灵活、高效性和生态段低耗、稳定性的最佳结合.研究表明,生物段HRT6～8h、人工湿地水力负荷0.34～0.54m3/(m2·d)时,组合工艺COD去除率为90%、TN去除率为60%～80%、TP去除率为99%,出水可作为湖泊的补充水源利用,达到保护湖泊生态的目的.关键词:城市污水;脱氮除磷;改良A2/O;短程硝化/反硝化;人工湿地中图分类号:X703.1文献标识码:A文章编号:0367-6234(2008)04-0650-06CollaborativetechnologyofbiologicalandecologicaltreatmentofmunicipalwastewaterCHENXiu-rong1,ZHOUQi2,ZHANGJie3(1.ResourceandEnvironmentalEngineeringCollege,EastChinaUniversityofScienceandTechnology,Shanghai200237,China,E-mail:irene-chen@126.com;2.EnvironmentalScienceandTechnologyCollege,TongjiUniversity,Shanghai200092,China;3.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)Abstract:InordertoreachthereasonableremovalofN/Pinthemunicipalwastewaterwiththefeaturesoflowconcentrationoforganicsubstrate,highconcentrationofnutritioussaltsanddiversequalities,anoptimalcom-binativetechnologyofbiologicalandecologicaltreatmentwasputforward.Thedesigncapacitytotreatwithwastewaterwas100m3/d.Thebiologicalunitwasactivesludgeprocess,theecologicalunitwascombinationofconstructedwetlandandplantstabilizationpond.Inthepilotscalestudy,variouskindsofsubstrateloadsweredistributedbetweenthetwotreatmentstagessothattheadvantagesofflexibilityandhighefficiencyofthebiologicaltreatmentwereoptimallycombinedwiththoseoflowcostconsumptionandstabilityoftheecologicaltreatment.TheresultsofthisstudyindicatethattheremovalofCOD,TN,TPisrespectively90%,60%-80%and90%whentheHRTofbiologicalunitis6-8handthehydraulicloadofconstructedwetlandis0.34-0.54m3/(m2·d).Theeffluentcanbeusedtorestorehealthyecologicalenvironmentoftheconfinepollutedwaterbodies.Keywords:municipalwastewater;removalofnitrogenandphosphoru