ABSTRACT
T.H.Y.TEBBUTT,B.Sc.,S.M.,Ph.D.,M.I.C.E.,M.I.W.E.S. SeniorLecturer,DepartmentofCivilEngineering,TheUniversityof
Birmingham,Birmingham,UK
SUMMARY
Developmentsinwaterfiltrationhaveenabledamoreefficientuseofthe processandhaveprovidedabetterunderstandingofthemechanisms involved.Goodfiltratequalitycanbeachievedathigherloadingsthanwould havebeenconsideredpossiblesomeyearsagoandtheadventofdualand multimediabedshasbroughteconomicbenefits.Aconsequenceofmore effectiveuseofbedcapacityisthattheprocessismorelikelytobeinfluenced bythenatureofthesuspendedsolidsinthefeed.Aconsequenceofobtaining deeperpenetrationofsuspendedmatterintoafilterbedistheneedtoensure adequatecleaningarrangements.Thecomplexityofthefiltrationprocessis suchthatmathematicalmodelscannotasyetprovideauniversalsolutionfor anysituationbuttheirexistenceisofvalueinhelpingtodevelopmore efficientfiltrationplants.
