1、Designation:D615797(Reapproved 2017)1Standard Practice forDetermining the Performance of Oil/Water SeparatorsSubjected to a Sudden Release1This standard is issued under the fixed designation D6157;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、of revision,the year 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.1NOTEThe Keywords Section was added editorially in December 2017.1.Scope1.1 This practice describes the testin
3、g procedure,any nec-essary related apparatus,and the sampling technique to be usedin determining the performance characteristics of an oil/waterseparator subjected to the sudden release of a relatively largequantity of hydrocarbons that may appear in its influent in pureform or at high concentration
4、.1.2 This practice does not address the determination of theperformance characteristics of an oil/water separator subjectedto surface run-off resulting from rain water draining fromimproved or unimproved land.In this case,refer to PracticeD6104.1.3 This practice does not address the determination of
5、 theperformance characteristics of an oil/water separator subjectedto a mechanically emulsified influent such as provided by apump.1.4 This practice does not investigate the ability of theseparator to handle debris or suspended solids,that is,grit ortree leaves.1.5 While the effluent may meet code r
6、equirements for totaloil and grease content,this practice does not address thepresence of soluble organics,that is,benzene,toluene,ethyl-benzene,and xylene(BTEXs)that may be detected in theeffluent.It also does not make any provisions for the effects ofdetergents,surfactants,soaps or any water solub
7、le matter(thatis,salts)or any portion of an essentially insoluble matter thatmay be found in solution on separation.(Effects of certainwater soluble chemicals or solids may be investigated byadding them to the water at predetermined constant concentra-tions.)1.6 In order to estimate the effect of wa
8、ter temperature onthe performance of the separator,the tests described in thispractice must be performed at two water temperatures.Theselected temperatures must be at least 10C(18F)apart,withthe temperature ranging from a minimum of 0C(32F)to amaximum of 50C(122F).1.7 This practice does not make any
9、 provisions for thevariation of pH or temperature during a test run.Refer toAppendix X1 for further detail.1.8 This practice can be used with a variety of hydrocar-bons.It adopts No.2 fuel oil with a density2of 845 kg/m3(52.73 lbm/ft3)and a viscosity2of 1.9 to 4.1 centistokes at40C(104F)and SAE 90 l
10、ubricating oil with a density(SeeSAE J313)of 930 kg/m3(58 lbm/ft3)at 15.5C(60F)and aviscosity(see SAE J306)of 13.5 to 24 centistokes at 100C(212F)as the comparative testing media.It is understood thatthe results obtained from this practice are only directlyapplicable to No.2 fuel oil and SAE 90 lubr
11、icating oil for thetested concentrations and only careful interpolation orextrapolation,or both,is allowed to other hydrocarbons.Lowviscosity or high density hydrocarbons or hydrocarbons thatcontain a larger fraction of highly soluble compounds mayneed to be tested separately.NOTE1No extrapolation o
12、utside the range of the tested influent oreffluent oil concentrations is allowed as performance may not be linear.Hence,to establish performance at a higher or lower concentration,theseparator shall be tested for that specific condition.In addition,linearitymust be established prior to using linear
13、interpolation.1.9 Since regulations are based on effluent total hydrocar-bon content,this practice does not set forth any lower limits onoil particle size for the evaluation of separator efficiency.However,a standardized means for mixing oil and water shallbe specified to ensure repeatability.It mus
14、t be noted howeverthat smaller particles,having a greater surface area to volumeratio,rise at a slower rate than their larger counterparts.(GuideF933 requires that 20%of all oil particles be smaller than orequal to 50 m and IMO MEPC 60(30)does not mention anyparticle size requirements but asks the u
15、ser to avoid emulsioncausing chemicals.)1This practice is under the jurisdiction of ASTM Committee D19 on Water andis the direct responsibility of Subcommittee D19.06 on Methods for Analysis forOrganic Substances in Water.Current edition approved Dec.15,2017.Published January 2018.Originallyapproved
16、 in 1997.Last previous edition approved in 2011 as D6157 97(2011).DOI:10.1520/D6157-97R17E01.2Bolz,R.E.,and Tuve,G.L.,CRC Handbook of Tables for Applied EngineeringScience,2nd Edition,CRC Press,1991.Copyright 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 Internation
