Designation:D4188−13StandardPracticeforPerformingPressureIn-LineCoagulation-Flocculation-FiltrationTestinWater1ThisstandardisissuedunderthefixeddesignationD4188;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticecoverstheprocedureusedtoperformpressurein-linecoagulation-flocculation-filtrationofwaterandwastewater.Itisapplicabletowaterandwastewaterwithrelativelylowsuspendedsolids(<30mg/L).Thepracticeisapplicableforanysizefiltergreaterthan100mm(4in.)indiameter.1.2Thispracticecanbeusedtodeterminetheeffectivenessofflocculantsorcoagulants,orboth,andfiltermedium(a)inremovingsuspendedandcolloidalmaterialfromwaterandwastewater.1.3Intervalbetweenfilterbackwashing,backwashrequirements,rinserequirements,andeffectoffiltrationrateoneffluentqualitycanalsobeobtainedwiththispractice.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevalueslistedinparenthesisareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD2035PracticeforCoagulation-FlocculationJarTestofWaterD3370PracticesforSamplingWaterfromClosedConduitsD4189TestMethodforSiltDensityIndex(SDI)ofWaterD6698TestMethodforOn-LineMeasurementofTurbidityBelow5NTUinWaterD6855TestMethodforDeterminationofTurbidityBelow5NTUinStaticModeD7315TestMethodforDeterminationofTurbidityAbove1TurbidityUnit(TU)inStaticMode3.Terminology3.1Definitions:Fordefinitionsoftermsusedinthispractice,refertoDefinitionsD1129.4.SummaryofPractice4.1Aflocculantorcoagulant,orboth,isaddedtoapressurizedflowingwaterorwastewaterstream,andtheflocthatformsisremoved...
