1、Designation:D418817Standard Practice forPerforming Pressure In-Line Coagulation-Flocculation-Filtration Test in Water1This standard is issued under the fixed designation D4188;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the procedure used to performpressure in-line coagulation-flocculation-filtration of water andwaste
3、 water.It is applicable to water and waste water withrelatively low suspended solids(30 mg/L).The practice isapplicable for any size filter greater than 100 mm(4 in.)indiameter.1.2 Thispracticeforperformingpressurein-linecoagulation-flocculation-filtration tests in water relies on tur-bidity measure
4、ment to assess the water quality,referring to TestMethods D7315,D6698,or D6855 to perform the turbiditymeasurement.1.3 This practice can be used to determine the effectivenessof flocculants or coagulants,or both,and filter medium(a)inremoving suspended and colloidal material from water andwaste wate
5、r.1.4 Intervalbetweenfilterbackwashing,backwashrequirements,rinse requirements,and effect of filtration rate oneffluent quality can also be obtained with this practice.1.5 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-
6、pound units that are provided for informa-tion only and are not considered standard.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental pr
7、actices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides a
8、nd Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD2035 Practice for Coagulation-Flocculation Jar Test ofWaterD3370 Practices for Sampling Water from Closed ConduitsD4189 Te
9、st Method for Silt Density Index(SDI)of WaterD6698 Test Method for On-Line Measurement of TurbidityBelow 5 NTU in WaterD6855 Test Method for Determination of Turbidity Below 5NTU in Static ModeD7315 Test Method for Determination of Turbidity Above 1Turbidity Unit(TU)in Static Mode3.Terminology3.1 De
10、finitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.4.Summary of Practice4.1 A flocculant or coagulant,or both,is added to apressurized flowing water or waste water stream,and the flocthat forms is removed,using a filter medium(a).4.2 The effectiveness of the sys
11、tem in removing suspendedand colloidal matter is determined by monitoring the quality ofthe filter effluent.4.3 A holding tank for floc formation or floc growth isoptional.4.4 The practice also provides information on intervalbetween filter backwashing,backwash requirements,rinserequirements,and eff
12、ect of filtration rate on effluent quality.5.Significance and Use5.1 Pressure in-line coagulation-flocculation followed byfiltration is an effective process to remove suspended andcolloidal matter from water and waste water.1This practice is under the jurisdiction of ASTM Committee D19 on Water andi
13、s the direct responsibility of Subcommittee D19.03 on Sampling Water andWater-Formed Deposits,Analysis of Water for Power Generation and Process Use,On-Line Water Analysis,and Surveillance of Water.Current edition approved Dec.15,2017.Published January 2018.Originallyapproved in 1982.Last previous e
14、dition approved in 2013 as D4188 13.DOI:10.1520/D4188-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright
15、 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Stand
16、ards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.2 The effectiveness of this process is dependent on thetype and concentration of the flocculant or coagulant,or both,the pH,the temperature,the filtration medium(a),and thefiltration rate.This practice permits the evaluation of thesevarious parameters.5.3 This practice can also be used to determine filterbackwash and rinse requirements.5.4 The results obtained from this practice c