单多晶硅生产废水处理工程实例郑静

　20120113()JournalofHuaihaiInstituteofTechnology(NaturalScienceEdition)Vol.20　No.1Mar.2011　　DOI:10.3969/j.issn.1672-6685.2011.01.017、＊郑　静1,陈　敏2,钱　飞3(1.,　210044;2.,　214021;3.,　210048)　:针对江苏省某硅科技有限公司企业排放的单、多晶硅生产废水的特点,采用分质排放,单独预处理,其中含氟废水采用调节pH、化学反应沉淀后再混凝反应沉淀,清洗包装、压滤废水采用混凝反应预处理后两股废水混合,再采用UASB—生物接触氧化工艺进行处理。工程实践表明,出水达到《综合污水排放标准》(GB8978-1996)中的指标。该工艺处理效果优良,系统运行稳定,耐冲击负荷,运行费用较低。:混凝反应;沉淀;UASB;生物接触氧化:X703　　　:A　　　:1672-6685(2011)01-0062-04EngineeringDesignandDisposalofWasteWaterCausedbySingleandPolycrystallineSiliconProductionZHENGJing1,CHENMin2,QIANFei3(1.BinjiangCollege,NanjingUniversityofInformationScience&Technology,Nanjing210044,China;2.WuxiNewHopeEnvironmentalScienceandTechnologyCo.,Ltd.,Wuxi214021,China;3.WuxiMurataElectronicsCo.,Ltd.,Wuxi210048,China)Abstract:ThisengineeringdesignaimedtodisposeofthewastewaterdischargedbyasilicontechnologycompanyinWuxi.Itemployedthecraftofwastewaterdisposalbydifferentsubstanceandindividualpre-disposingsewage.Thefluoride-containingwastewater,whosepHvaluehadbeenadjusted,wasprecipitatedbycoagulationreactionafterchemicalprecipitation,andwasmixedwithanotherbranchofwaterproducedbypackageclearingandpre-disposingofcoagula-tionduringfilterpressing.WedisposedofthismixturebyUASB-BiologicalContactOxidation.ExperimentsofthisdesignsuggestedthatthequalityofthefinallydisposedwastewatermetthestandardintheSyntheticStandardofDischargedWasteWater(GB8978-1996).Thisengineer-ingdesignworksefficientlyandisshock-loadproofwithalowcost.Keywords:coagulationreaction;sedimentation;up-flowanaerobicsludgebed(UASB);biologi-calcontactoxidation　　、,、,,(、)。3,/、,/,＊:2010-11-17;:2011-01-20:(1983-),,,,,,(E-mail)[e-mail]。。/、,、、(PEG400)、,HF、HNO3NaOH。、、,[1-2]、[3]、Fenton[4-7],Fenton,。,,pH、,、,UASB—。1　Q=200m3/d,10m3/h。、Q=2800m3/d,120m3/h。,1,《》(GB8978-1996)、。1　Table1　Qualityindicatorsofin-and-outflowwaterpHρ(F-)/(mg/L)ρ(NH3-N)/(mg/L)CODCr/(mg/L)BOD5/(mg/L)SS/(mg/L)1.68128151(NO3-N)——≤10、5～6——5000200010006～9≤10≤15≤100≤30≤702　pH7～8,,。CaCl2CaF2,,FeSO4PAC。/,。pH6.5～8.5,PAC,PAM,,。,,(UASB)。,,,。,。1。(1)。,、,、。、,,。(2)。,,,,。,pH,,。(3)。,。(4)UASB()。UASB,,。(5)。,,、。(6)。。,。(7)。63　1　:、,,,,。。1　Fig.1　Schematicdiagramofwastewatertreatmentprocess3　(1)。(L×B×H)14m×4m×4m;3.7m;160m3;HRT16h;2,1,1。(2)、。(L×B×H)3m×1m×3.5m,3;(L×B×H)3m×3m×4m;41min;13.5min;1.27m3/(m2·h);,3,pH1,4。(3)、。(L×B×H)3m×1m×3.5m,3;(L×B×H)3m×3m×4m;41min;13.5min;1.27m3/(m2·h);3,3。(4)。(L×B×H)15m×14m×4m;3.7m;755m3;HRT6.2h;2,1,1。(5)。(L×B×H)7.5m×2.5m×3.5m;26min;3,3。(6)。(D×H)14m×4m;0.81m3/(m2·h);2h;1。(7)。(L×B×H)11.5m×7.5m×4m;2,1,1;(8)UASB。4;(L×B×H)19m×18.4m×7.2m;COD=4500mg/L,CODE=50%;16h;3.8kg/(m3·d);0.5kg/(kg·d);4,4。(9)。,;COD,E80%,80%;BOD,E90%,90%;HRT19h;(L×B×H)20.9m×18.4m×7m;0.69kg/(kg·d);0.1kg/(kg·d);11000mg/L;50%;5m,2;4(31)。(10)。(D×H)16m×4m;64()201130.67m3/(m2·h);2h;1,2。。4　,,。,、。,。,,。,,(、、pH)。,。,,,,,。,,。5　20086,20098,3,1,,2。。2　Table2　TreatingeffectofeachunitCODCr/(mg/L)BOD5/(mg/L)ρ(NH3-N)/(mg/L)SS/(mg/L)ρ(F-)/(mg/L)pH——151(NO3-N)50107.545001900—60—7UASB22501200—3601790121542017　　2,—UASB—,CODCr,BOD5,F-98.2%,99%,99%。。3000t/d,556.6,120,360.8,75.8。1.66/m3()。6　(1)、,,,,。(2),,,、,,,。(3),UASB,。(4),,。,。:[1]　.[J].,2005,15(2):19-20.[2]　.[J].,2010,26(4):23-27.[3]　,,,.[J].,2009,35(4):116-119.[4]　,,.——[J].,2006,26(1):41-44.[5]　,,,.Fenton[J].,2010,4(4):776-780.[6]　,,,.Fenton[J].,2009(6):21-23.[7]　.Fenton[J].,2010,19(3):76-78.(责任编辑:褚金红)65　1　:、