OGO工艺处理城市污水的脱氮除磷效能与水力特性的试验研究_许晓毅(1)

第26卷第8期2006年8月环境科学学报ActaScientiaeCircumstantiaeVo.l26,No.8Aug.,2006基金项目:国家自然科学基金(No.50378095)SupportedbytheNationalNaturalScienceFoundationofChina(No.50378095)作者简介:许晓毅(1974—),女,博士研究生;*通讯作者(责任作者),E-mail:gyluo@cqu.edu.cnBiography:XUXiaoyi(1974—),female,Ph.D.Candidate;*Correspondingauthor,E-mail:gyluo@cqu.edu.cn许晓毅,罗固源,唐刚,等.2006.OGO工艺处理城市污水的脱氮除磷效能与水力特性的试验研究[J].环境科学学报,26(8):1295-1301XuXY,LuoGY,TangG,etal.2006.ExperimentalstudyonnitrogenandphosphorusremovalofmunicipalwastewaterandhydrauliccharacteristicsinOGO[J].ActaScientiaeCircumstantiae,26(8):1295-1301OGO工艺处理城市污水的脱氮除磷效能与水力特性的试验研究许晓毅,罗固源*,唐刚,季铁军重庆大学三峡库区生态环境教育部重点试验室,重庆400045收稿日期:2005-11-09修回日期:2006-05-15录用日期:2006-06-14摘要:在OCO反应器的基础上改进得到了OGO反应器.在反应器改进前后脱氮除磷效能对比试验的基础上,进行了反应器水力特性的试验研究.城市污水对比试验研究结果表明,OGO工艺较改进前具有更为稳定、良好的生物同时脱氮除磷效果,工艺出水的平均值COD为22mgL-1、NH+4-N为4.8mgL-1、TN为11.2mgL-1、TP为0.80mgL-1.反应器流态特征的试验结果表明,改进后形成的OGO反应器内,缺氧环区形成了良好的DO浓度梯度分布,且OGO反应器内推流流态所占比例从改进前的5.9%提高到改进后的12.9%,有效提高了反应器内推流流态的容积利用率和反应器效率.同时,反应器改进后能明显改善混合区水力条件,并有效避免了混合区内侧液流涡旋停滞造成的污泥沉积问题.关键词:OGO;生物脱氮除磷;水力特性;推流流态文章编号:0253-2468(2006)08-1295-07中图分类号:X703文献标识码:AExpermientalstudyonnitrogenandphosphorusremovalofmunicipalwastewaterandhydrauliccharacteristicsinOGOXUXiaoyi,LUOGuyuan*,TANGGang,JITiejunKeyLaboratoryoftheThreeGorgesReservoirRegion’sEco-Environment,MinistryofEducation,ChongqingUniversity,Chongqing400045Abstract:Therewasacloserelationshipbetweenbio-chemicalprocesscharacteristics,removalefficiencyofpollutantsandhydrauliccharacteristicsofmixingliquidforabiologicalreactor.OGOprocesswasarenovationreactorwhichdevelopedfromOCO.BasedonthecomparativetestsofnitrogenandphosphorusremovalinOCOandOGO,experimentsofhydrauliccharacteristicswerecarriedon.ResultsofcomparisonexperimentsformunicipalwastewatershowedthatthesimultaneousremovalefficiencyofnitrogenandphosphorusandstabilityinOGOwerebetterthaninOCOunderthesameoperationconditions.TheaverageeffluentconcentrationofCOD,NH+4-N,TNandTPwere22mgL-1,4.8mgL-1,11.2mgL-1,0.80mgL-1respectively.Studyresultsofflowpatterncharacteristic