Wastewater Treatment Lab Test Jul-2014

ImaginationImaginationatatwork.work.MeiZhangJul.2014WastewaterTreatmentLabTestIndex•Floculant/Coagulant•JarTest•DAF•Dewatering•BuchnerFunnelTest•CylinderTest•ShearResistantPolymerTest•Antifoam•MetalRemove4/1/20152JarTestApparatus:Apparatus:-Jartester-glassbeakers(600ml,accuratelymarkedat500ml)-plasticsyringes(1ml,3ml,5ml,10ml)-30mlplasticsyringefittedwith3”pieceoftubing-stopwatch-turbidimeter-HachDR-2010SpectrophotometerReagents:Reagents:-coagulantsdilutedtoappropriatedosingconcentration4/1/20153JarTestProcedure:Procedure:1.Filleachbeakerwith500mloftestsubstrate.2.PositionfilledbeakersonJartesterbase,onebeakerbeloweachpaddle.3.Insertpaddles.Startmixing@100rpm.4.Adddesireddosageofpolymersolutiontoeachbeaker.5.Mix2minutes@100rpm.6.Reducemixingspeedto35rpm.7.Mix5minutes@35rpm.8.Stopmixing,removepaddlesfrombeakers.9.Allowsolidstosettlefor5minutes.10.Extract~30mlofsupernatantwaterusing30mlsyringew/tubing.11.Measureturbidityofsupernatantsampleusingturbidimeter.4/1/20154JarTest—Cu/CODremovalBackground:•Process•WaterChemistry•CTQ-ResidualCu<0.5ppm-ReduceCODcontent•AdjustpH/SelectFlocculent,Coagulant-IC1172/CE2666•SetupJarTest4/1/20155pH8.00COD,ppm28000Turbidity,NTU>99999Cu,ppm265Zinc,ppm280JarTest—Cu/CODremovalReduceCOD4/1/20156Procedures1)Filleachbeakerwith500mlofwastewaterandadjustpHto6.5with25%HClsolution2)PositionfilledbeakersonJartesterbase,onebeakerbeloweachpaddle.3)Insertpaddles.Startmix@200rpm.4)AdddesireddosageofIC1172toeachbeakerandmixfor2min.5)Reducemixingspeedto50rpm6)AdddesireddosageofCE2666(0.5%stock)toeachbeakerandmixfor10min.7)Stopmixandremovepaddlesfrombeakers.8)Allowthesampletosettlefor10min.9)Measurethewaterqualityofsupernatant.JarTest—Cu/CODremoval•TheprogramIC1172+CE2666couldremoveCODandreducethecontentofCuandZnintheWWatpH6.5.•WhenthedosageofCE2666isupto700ppm,itdidnotremovemoreCOD,CuandZn.It’soverdosed.4/1/20157