寒冷天气下新型复合式生物生态系统_省略_艺处理生活污水的协同作用_英文_张鹏

ChineseJournalofChemicalEngineering,19(5)881—890(2011)SynergismofNovelSequenceBio-ecologicalProcessandBiologicalAeratedFilterforSewageTreatmentinColdClimate*ZHANGPeng(张鹏),HAIReti(海热提)**,ZHOUDongkai(周东凯),HEYiqun(何一群)andBAIZhiyuan(白志远)DepartmentofEnvironmentalScienceandTechnology,CollegeofChemicalEngineering,BeijingUniversityofChemicalTechnology,Beijing100029,ChinaAbstractAlab-scaleintegratedtreatmentsystemincludingthenovelsequencebio-ecologicalprocess(SBEP)andbiologicalaeratedfilter(BAF)forasewagemixture(chemistrylaboratorywastewateranddomesticsewage)waspresentedinthispaper.Themainobjectiveofthestudywastotestthecontributionofartificialaeration,recir-culationratioandmassconcentrationofsteelslagonpollutantremovalinwinterwhentheplantsaredormant.IthadbeenshownthatSBEPandBAFplaydifferentrolesinremovingcontaminantsfromwastewater.Duringtheairflowexperiment,theremovalefficiencyofCODandTPinSBEPwashigherthanthatinBAF,whereasBAFcancompensateforthedeficiencyofSBEPwherenosignificantimprovementonammoniumnitrogenremovalisob-served.Yet,theremovalefficienciesofCOD,TPand4NH+-NinSBEPcouldbeimprovedapparentlywhendiffer-entrecirculationratioorvariousmassconcentrationofsteelwereapplied.Especially,whentheairflowof0.06L·h−1,therecirculationratiorateof80%andthemassconcentrationofsteelof2.2-2.4g·L−1wereapplied,thehighestefficiencyof94.6%,77.9%and80.7%forCOD,TPand4NH+-Nwereachieved,respectively.Theinte-gratedtreatmentsystemofSBEPandBAFwasprovedtobeaneffectivewastewatertreatmenttechniqueandabet-teralternativetotreatdomesticsewage.Keywordsverticalsubsurfaceconstructedwetlands,biologicalaeratedfilter,bio-contactoxidationprocesscar-bonfiber,aeration,recirculationratio1INTRODUCTIONConstructedwetlands(CWs)areanecologicallyengineeredsystemandakintonaturalwetlands(NWs),andhasbeenrecognizedasacost-effectiveapproachtoremovethebiologicaloxygendemand(BOD),totalsuspendedsolids(TSS),bacteria(Escherichiacoli,totalcoliforms),nitrogen(N)andmetalsfromdiffer-entkindsofwastewaters[1-7].Incurrentresearches,althoug