英语翻译
Arecentglobalwatersupplyandsanitationassessmentreportsthatthepercentageofpeopleservedwithsomeformofimprovedwatersupplyrosefrom79%(4.1billion)in1990to82%(4.9billion)in2000.Forsanitationpurposesanincreasefrom55%(2.9billionpeopleserved)to60%(3.6billion)wasregisteredduringthesameperiod.Atthebeginningof2000one-sixth(1.1billionpeople)oftheworld'spopulationwaswithoutaccesstoimprovedwatersupplyandtwo-fifths(2.4billionpeople)lackedaccesstoimprovedsanitation[1].AttheSecondWorldWaterForum,TheHague,17~22March2000,targetswerepresentedinthereportVISION21wheretheaimwasby2015toreducebyhalftheproportionofpeoplewithoutaccesstosanitationandaccesstoadequatequantitiesofaffordableandsafewater,andby2025toprovidewater,sanitation,andhygieneforall[1].Toachievechesetargetsthismeansprovidingwatersupplyservicesto280,000peopleandsanitationfacilitiesto384,000peopleeverydayforthenext15years.Toreachuniversalcoveragebytheyear2025,almost3billionpeoplewillneedtobeservedwithwatersupplyandmorethan4billionwithsanitation.Thewatersupplyandsanitationsectorwillfaceenormouschallengesoverthecomingdecadeswherethewaterindustrywillneedtomeetthefastgrowingneedsinaglobalperspective.Withthisperspective,theglobalwatermarkedhasbeenestimatedatatotalvalueofaround224billionwithananticipatedannualgrowthofaround16%~20%dependingonthemarketsegment.Drinkingwaterproductionisstipulatedtohavethelargestgrowthwithadoublingofthemarketvalueintheperiod2000~2015.Themarketforwastewatertreatmentisthelargestsectorwithananticipatedgrowthofaround43%forthesameperiod.
Membraneseparationtechnologieshavebeenidentifiedasoneofthepossiblesolutionstomeetthefuturedemandswithregardtowatersupplyandsanitation.Recentstudieshavestipulatedayearlyincreaseof7.8%inthedemandformembranematerialswithatotalvalueofmembranesystems(includingequipmentsuchaspumpsandpiping)reachingUSD4.8billionin2004.Waterandwastewatertreatmenthasbeenidentifiedasthelargestenduseformembranematerials,wheretheywillcontinuetodominate.Implementationandexpansion