STUDIES ON OPTIMISING THE BACKWASH 'REQUIREMENTS FOR FILTERS

Abstract

The pereent dissertation work, de is with the stu1y of opt i.mie1ng the bsokwfob requirementsfor filte'a to reduce the ba c ,aping cost. The bsckwn b vellocit'et required skt5 aarres pout i.ng hem. 1osees have been determi n for Rift#teat 8170a of ! a ant'br*cite' . The optimum exp a i nr of the bed, wh i oh gives Minimum bn,okwaeb requirement , h,e beon f ouM sis 30% for both Pond, s, a'uthrotoite. 't ba bent !ho by rt1ona1 m ,themat cal *p oaova that optimum exp tn1un rhruld lie between 2O to 3C • At bnakwnrh at 3O exp ion 5O to . 9Qt etratif i.cation wqe observed. In teaift; uw#d for convention rapid ea,f filter, A6 the head lose ie Is !t ape?t1nt of the in $ i , d Ifferent oolumrn of the hs r i oonE d f 41.t.tr having different elves of media act be beckweob imultn a us1y