二沉池污泥上浮的控制策略

二沉池污泥上浮的控制策略二沉池污泥上浮的控制策略侯巧玲�关云峰�尉国红�罗国强(北京城建环保投资发展股份有限公司�北京100022)��摘�要�河北大城县污水处理厂采用以氧化沟为主体的污水处理工艺,分析了二沉池污泥上浮产生的原因。认为硝化程度高、污泥在二沉池中停留时间过长是引起污泥上浮的主要原因。采取了减小氧化沟中的溶解氧以降低硝化反应的程度、合理调控二沉池的运行、加大污泥回流量和剩余污泥的排放量等措施后,污泥上浮现象得到有效控制,水厂运行逐渐恢复正常。��关键词�氧化沟�污泥上浮�反硝化ControlofSludgeFloatingintheSecondarySettlingTankHOUQiaoling�GUANYunfeng�WEIGuohong�LUOGuoqiang(BeijingUrbanConstructionEnviromentalProtectionInvestment&DevelopmentCo.,Ltd.�Beijing100022)Abstract�TheoxidationditchsludgetreatmentprocessisusedinDachengSewageTreatmentPlant.Thecausesoffloatingupwardofsludgeinsecondarysettlingtankisdiscussed.Themaincausesoffloatingupwardofsludgeisthehighdegreeofnitrificationandtoolongsludgere-tentioninthesecondarysettlingtank.Somemeasuresareadoptedtocontrolthesludgefloatingandmketheproductionnormal,suchasre-ducingthedissolvedoxygenintheoxidationditchtolowerthedegreeofnitrification,reasonablymodulatingtheoperationofthesecondarysettlingtankandincreasingsludgerefluxandremainedsludgerelease.KeyWords�oxidationditch�floa