HW 6 Solutions

# HW 6 Solutions - 6.4 gravityof 1'4 anda diameter(a what is...

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6.4 (a) what is the terminal settling velocity of a particle with a specific gravity of 1'4 and a diameter of 0.010 mm in 20o C water? (b) Would particles of the size in part (a) be completely removed in a settling basing with a width of 10.0 m, a depth of 3.0 m, and length of 30.0 m and a flow rate of 7,500 m3/d? (c) what is the smallest diameter particle of specific gravity l '4 that would be removed in the sedimentation basin described in part (b)? (At fXn(b'r\ V: ' 6l!:" U*' \f*u d( , a"ol ut-' = l X/o- 5- ,rt^. 'J : q'8 -ls' (= lrora:'i7'{.7 Ytf,^^3 g}ct' !4 l,'t ( lrlroJ l*t 'uL h)*l ,/Lt-- lxts's 4 )u,n'\ v:' (4.n,""1s )LrYt,-tr -4t*{ iH"2(iryf t'6 (/xro-} L'r/^.s) 7.1+ x,o't t\9) 17,^(b.t) Ur- Ao '- (lo*)( |o'-\ ; Jsu, *'/rl 'loo,u.L b, A, :Zs ^2- 5W,ry' td l\^tt lnn.^ I --r- 'L4V (ro,o* (P Sz ; 2 S4 \to-"t il^) I {o ) V'>S cc\ fb.[6,v ) td )\^ -? .41 7.4V {9ovun grtd,rn1 dg" (F<t" 8 {os Y.to''n*?lS k'df ' k (,*\.,*, ;gcrit o. .,,F 2 ,'" 91L, frhLs: r,-lldLi--*nU u-lk*o^ A. r 3Qe-{Jdr' h > 1suo91 tn\ tYSw- ^ 3t (r t )'\ L6 L8'usx 6"*tl\LLyrf,r ho1^ ,\ ?,v!ls,J [r3']"rr- "n6/ Pd*r)Lao,*' \ rAg '

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6.5 you are trying to remove 10.0 um diameter particles in a water treatment plant- The water is at2}"c,and the particle density is 1.2 g/ml. The plant treats 0.100 m3/s of water. It is proposed to use a 3.5 m deep, rectangular sedimentation tank with a length to width ratio of 5:1' What is the minimum required width of the basin? /\^ L,'r A, - ["6 Q'. --'- 0, I ^3lt y,,c^'vV',t l*,s e. zc:'q tl, ts ^ls z = l.t'fn 71tr, ,2 Vrl*J & zo'c Q, /\1 t= t) t/ \( ( lQe-lVr- Au '' lr (o,t *?>) ( iYb'5kzf^':\ '1T ^ts'T tzou-'rq\, z FoJ^)\ L /*'o rw') h, i 7otl5 u'\t- b ^2 fla\$)t-
6.17 The water with the composition shown in the following table is to be softened' Component Concentration (mg/L) COztuq) 14.5 Ca 110.0 Mg'* 50.7 Na* 75 HCO3' 350 SO+" 85.5 CI 16.2 pH 8.2 (a) What is the concentration (in meq/L) of

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HW 6 Solutions - 6.4 gravityof 1'4 anda diameter(a what is...

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