PSAF混凝剂预处理阿维菌素废水试验研究李再兴

294Vol.29,No.4200812JournalofHebeiUniversityofScienceandTechnologyDec.2008　　:1008-1542(2008)04-0332-04PSAF李再兴1,黄云龙2,杨景亮1,郭建博1,刘　春1,廉　静1,邢丽楠1(1.河北科技大学环境科学与工程学院,河北石家庄　050018;2.河北省环境保护开发服务中心,河北石家庄　050051)　:通过以粉煤灰和硫铁矿烧渣为原料制备的复合高效混凝剂聚硅酸铝铁(PSAF)预处理阿维菌素废水,取得了较好的混凝效果。其最佳工艺条件:pH值为6.5～7.5,PSAF投加的质量浓度为80mg/L,废水中COD,SS和AVM的去除率可分别达到18.9%,34.6%和20.5%;处理后废水ρ(BOD5)/ρ(COD)由0.31提高到0.42,废水的可生化性得到一定的提高,为废水的后续生化处理打下了良好的基础。:粉煤灰;硫铁矿渣;PSAF;混凝;阿维菌素废水;预处理:X703　　　:AStudyonpre-treatmentofavermectinwastewaterwithPSAFcoagulantLIZai-xing1,HUANGYun-long2,YANGJing-liang1,GUOJian-bo1,LIUChun1,LIANJing1,XINGLi-nan1(1.CollegeofEnvironmentalScienceandEngineering,HebeiUniversityofScienceandTechnology,ShijiazhuangHebei050018,China;2.EnvironmentalProtectionServicesCentreofHebeiProvince,ShijiazhuangHebei050051,China)Abstract:Anewtypeofhigheffectivecomplexcoagulantpolysilicatealuminumferric(PSAF)waspreparedfromflyashandpyriteslag.TheresultsshowedthatPSAFhadagoodcoagulationeffectinthepre-treatmentofabermectinwastewater.TheoptimumconditionswerethatthepHvalueofinfluentwas6.5～7.5,thedosageofPSAFwas80mg/L,theconcentrationofCOD,SSandρ(AVM)'sremovalratereached18.9%,34.6%and20.5%,respectively.TheeffluentBOD5/CODofabermectinwastewaterwasincreasedfrom0.31to0.42,andthebiodegradabilitywasimprovedalot.Keywords:flyash;pyriteslag;PSAF;coagulation;avermectinwastewater;pre-treatment　　:2008-07-04;::(06276705):(1973-),,,,,。　　,、、、、,[1]。[2](avermectin,AVM),、、、,、、,[3]。,,,[4,5],,。[6,7],。(PSAF)、,[8],[9,10]。、PSAF,PSAF,,、。1　1.1　PSAF,1。表1　粉煤灰和硫铁矿烧渣的化学组成Tab.1　Compositionsoftheflyashandpyriteslag%w(SiO2)w(Al2O3)w(Fe2O3)w(CaO)w(MgO)53.8527.874.181.112.2618.137.2765.252.431.251.2　、、、、、、、、COD。1.3　pH:pHS-3[11];ρ(COD):[11];ρ(SS):[11];AVM:[12]。1.4　AVM,、、(VFA)、AVM,:pH3.5～4.5,ρ(COD)=27000～32000mg/L,ρ(SS)=1500～1800mg/L,AVM195～215μg/L。1.5　,300mL500mL,pH,,2min,10min,30min,2～3cmpH,ρ(COD),ρ(SS)AVM。2　PSAF2.1　1,SiO2Al2O3,Al(3Al2O3·2SiO2),。,,,SiAl。,、,Si—Al,Si,Na2SiO3;150℃,0.4MPa,NaOH,3h。(pH3.5)。2.2　Si,,(30%HCl,30%H2SO4)80℃,NaCl,Al2O3。Fe2O3,。Al3+,Fe3+,24h。PSAF,8%,pH2.0,0.5～0.8,1.08～1.12kg/cm3,4×105。3　333　4　　　　　　　　　　　　　PSAF3.1　pHPSAF80mg/L(,),HClNaOHpH,pH,1。图1　原水pH值对混凝效果的影响Fig.1　InfluenceofpHvalueoncoagulationperformanceofcoagulants1,pH6.5～7.5PSAF。pH6.5,COD,SSAVM18.1%,33.6%20.3%。PSAFAVMpH6.5～7.5。3.2　PSAFpH7.0,PSAF,PSAF2。图2　PSAF投加量对混凝效果的影响Fig.2　DosageofPSAFoncoagulationperformanceofcoagulants2,PSAF,COD,SSAVM,PSAF80mg/L,,COD,SSAVM18.9%,34.6%20.5%。PSAF,。PSAF80mg/L。3.3　,,,“”,;“”,,,。,200r/min,2min;80r/min,10min。3.4　AVM,25,50,100μg/L,、、[4]。PSAF,CODAVM18%20%,。ρ(BOD5)/ρ(COD)=0.31,ρ(BOD5)/ρ(COD)=0.42。AVM,,。334　　　　　　　　　　　　　　　　2008　3.5　图3　不同混凝剂对AVM废水的净化效果Fig.3　RemovalefficiencyofAVMwastewaterbydifferentcoagulants,、、、,。,。PSAF(PAC)、(PFS)AVM。,PSAF,PACPFS80,150120mg/L,3。,PSAFPFSPAC、、;PAC,,。PSAF;PAC,、;PFS。pH,PFSpH,PAC,PSAF。3,,PSAF,PFS,PAC。,PFSPSAF,PSAF1.5。,PSAF,,PSAF、,,,。,PSAF、、、,。4　　1)PSAF,:pH6.5～7.5,PSAF80mg/L,COD,SSAVM18.9%,34.6%20.5%,ρ(BOD5)/ρ(COD)0.310.42,,。2)PSAF、,,PACPFS。3)、PSAF,、,、。:[1]　　,,.[J].,2002,35(2):44-48.[2]　YOONYJ,KIMES,HWANGYS,etal.Avermectin:Biochemicalandmolecularbasisofitsbiosynthesisandregulation[J].AppliedMicrobiologyandBiotechnology,2004,(63):626-634.[3]　,,.[J].,2004,26(2):5-10.[4]　,,,.[J].,2001,19(1):13-15.[5]　,,,.[J].,2002,22(6):347-349.[6]　　,.[J].,2005,(3):56-57.[7]　,,.[J].,2002,28(6):340-342.[8]　　,.[J].,2005,(2):23-25.[9]　.[J].,1999,15(2):1-4.[10]　,　,.[J].,2006,32(2):67-69.[11]　《》.[M].4.:,2002.[12]　,,,.[J].,2007,23(3):7-9.335　4　　　　　　　　　　　　　PSAF