间歇曝气氧化沟工艺处理城市污水实验

间歇曝气氧化沟工艺处理城市污水实验间歇曝气氧化沟工艺处理城市污水实验3韦彦斐梅荣武周刚杨继飞(浙江省环境保护科学设计研究院,杭州310007)摘要:为了提高氧化沟工艺对城市污水的脱氮能力,对设置缺氧池和厌氧池的氧化沟工艺采用了鼓风曝气和水下搅拌的曝气方式和连续流间歇曝气的运行方式。研究结果表明:间歇鼓风曝气的运行方式能够提高氧化沟系统的脱氮率,可达43129%～62135%;同时提高了系统的脱磷效率,脱磷率达40123%～76167%;而曝气能耗比同等条件转刷曝气的能耗降低42186%～57114%。关键词:间歇曝气;氧化沟;脱氮除磷;城市污水EXPERIMENTONTREATMENTOFURBANSEWAGEBYOXIDATIONDITCHWITHINTERMITTENTAERATIONWeiYanfeiMeiRongwuZhouGangYangJifei(EnvironmentalScienceResearch&DesignInstituteofZhejiangProvince,Hangzhou310007,China)Abstract:Inordertoimprovethenitrogenremovalefficiencyofurbansewage,anoxidationditchwithselectorandanaerobictankisstudied.Duringthestudy,theaerationandagitationareseparated,andcontinuousflowandintermittentaerationarecarriedout.Intheexperiment,thenitrogenandphosphorusremovalefficiencyofoxidationditchwasimprovedbyintermittentaeration.Thenitrogenandphosphorusremovalefficiencywas43129%～62135%and40123%～76167%inthedifferentintermittentaerationmode.Comparingwiththeexterioraerationsystem,the42186%～57114%energywassavedintheventilatorae