二沉池污泥上浮的控制策略侯巧玲

侯巧玲　关云峰　尉国红　罗国强(　100022)　　　　,。、。、、,,。　　　　　ControlofSludgeFloatingintheSecondarySettlingTankHOUQiaoling　GUANYunfeng　WEIGuohong　LUOGuoqiang(BeijingUrbanConstructionEnviromentalProtectionInvestment&DevelopmentCo.,Ltd.　Beijing100022)Abstract　TheoxidationditchsludgetreatmentprocessisusedinDachengSewageTreatmentPlant.Thecausesoffloatingupwardofsludgeinsecondarysettlingtankisdiscussed.Themaincausesoffloatingupwardofsludgeisthehighdegreeofnitrificationandtoolongsludgere-tentioninthesecondarysettlingtank.Somemeasuresareadoptedtocontrolthesludgefloatingandmketheproductionnormal,suchasre-ducingthedissolvedoxygenintheoxidationditchtolowerthedegreeofnitrification,reasonablymodulatingtheoperationofthesecondarysettlingtankandincreasingsludgerefluxandremainedsludgerelease.KeyWords　oxidationditch　floatingupwardofsludge　denitrification0　。。,,,[1]。1　。、3,,《》(GB18918—2002)A。1。1　2　1.5×104m3/d,10,10.8km2;4.0×104m3/d,16.6,16.7km2,。1,HRT1.5h,1,:17～20d,(BOD/MLSS)0.09kg/(kg·d),MLSS3.5g/L,HRT12h,100%。13,6(42),1。2(11)。、1。　　　　　　1　、mg/L(pH)BODCODSSTNNH3-NTPpH19037019045403.06～9≤10≤50≤10≤15≤5(8)≤0.56～9　　2。　　　　　2　mg/L(pH)BODCODSSTNNH3-NTPpH8621014052453.26～9　　2,,,。3　3.1　,,·52·　　　　　　　　　IndustrialSafetyandEnvironmentalProtection　　　　　　　　20113711November2011。200910,,,,。,,SS。,,,。,、,,。3.2　(1)。SVI170mL/g,,,12℃,,,,[2]。,SVI120mL/g,,。(2)。,、,1m3/d22500m3/d,,。2。2　2,97%,46.34mg/L,0.99mg/L,,6h,N2,,,。,,。,。(3)。,,,,,,。。4　(1),。,,DO2mg/L,,,,,DO1.2mg/L,3。3　DO3,DO,45.6mg/L,3.52mg/L,89%。(2)。0.8m3/(m2·h),2.5h,,0.4m3/(m2·h),。。(3),。80%120%,,,,,,,[3],。,5500mg/L3200mg/L,,。5　,,、、、,,。[1],,.AAC[J].,2006,26(4):78-79.[2],,,.A2/O[J].,2010,26(13):44-45.[3],,,.[J].,2000,18(6):25-27.　侯巧玲,女,1978年生,四川阆中人,硕士研究生,助理工程师,研究方向为水污染控制。(:2010-08-20)·53·