Lec1 3 Shebin EnG.com by Ahmed Nasser
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م س ق ة ي ح ص ل ا ة س د ن ه ل اSANITARY ENGINEERING DEPARTMENT دسة ن ه ل م ا س ق ة ي ن مد ل اCIVIL ENGINEERING اول ء ال ز ج ل ا اه ن م ل ا اد ب مد( لا ا دسة ن هWATER SUPPLY ENGINEERING ف ي س ز ي ز لع د ا ن ع مدى ح5/ .د8 ا
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Transcript of Lec1 3 Shebin EnG.com by Ahmed Nasser
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SANITARY ENGINEERING DEPARTMENT CIVIL ENGINEERING
WATER SUPPLY ENGINEERING./
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Surface Water Works ( ) ( 3-1) (3-2)............................................................. Intake ................................. Low Lift Pumps ................................... Raw water Sump .................................................Flash Mixing ................................................Gentle Mixing Sedimentation With Coagulants ............................................. Water Filtration..................................... Disinfection of water ( )..............Clear water Tank
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.............................Low Lift Pumps Raw water Sump . :- . . ( 6 ).
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() .......Sedimentation. : . . . ( 7 ). ( 8 ).. (settleable solids) ( suspended solids) :-
. . .
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Over Flow Rate=OFR= Q/A
........Detention Time (DT) : = ( ) Vol.) ( DT=HRT=T =Q = / Vol. = Q/T =.m3
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....( Sedimentation with Coagulants ) . ((Coagulants : :-Aluminum sulphate (alum), Al2(So4)3,18H2O.Coagulant + water = flocculation= flocsFlocs + suspended solids= fast sedimentation
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..............Flash Mixing 20 60 .DT=20-60 sec . ..............Gentle Mixing . 20 40 DT=20-40min..., .
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..Design Criteria of Sedimentation Tanks (Over Flow Rate=OFR) 20-40 / / . OFR Area=Q = 2- 4 .(DT) Detention timeVolume= Q (DT) =3- 6. 30 / . 40 , 30 . 4:1. 40 . 4503 / / .
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(1) :- 120.000 : . . ( ) . 30/ 250 . . 4 60 /. :- : 40 . = . = 120.000 40 ( 60 60 24 ). = 55.5 . : (d2/4)d = 0.25d3 d=4.2 m
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( ): : = 30 3 / 2 /. = 120000 30 = 4000 2 32 8 . = 15.6 16 = 250 2. 31.25 8 . 3 . = 120000 3 24 = 15000 3 . = = 15000 4000 = 3.75 . : = 16 30 = 120000 30 60 24 = 2500 3 . = 2500 16 = 156.25 3 . 8 3 7.75 .
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( ) : : ( ) = 4000 2 ( ) = 2500 3 3.75 . =3.75-05= 3.25 . = 769 . ( +) = 4769 = 6 =4769 6= 794/ D = 32 = 769 6 = 128 2 . ( ) = 12.8 .
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: = 30 / ( / 3 ). = 120000 30 = 3.600.000 /. = 3600 / = 3.6 /. = 3.6 365 = 1314 . = 1314 250 = 328500 : =60 / 90 % . = 120.000 60 0.90= 6480 / = 6.48 /. 98% 2% = 324 /. = = 1 . = 3243 .
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(16 ). = 20.25 3 /. 4 10.256 = 3.375 3 2 0.5 0.5 .
(6 ) = 453 /. 4 6 = 54 6 = 9 3 . 0.50 .
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