. Composition and treatment of Lake Michigan water . O 03 PhH iH O > Ph CH 1 CD CO •rH P P fn I PJ•H 03 fn fH-d0 *H CD PJ + o o fn rH CO •a!) CO o3 b rH <U sh pi fn Ph o3 PhO 60 60 o CO CQ CO fH ^3CQ CO fH CQ CO fH CQ CO fH cq PJ o co CD fnP ^J•H CD-P P H O O PhCQPJ Ho pJ CO «H O o3 CDfH HrH CO fH CQ to CQH CQ HH HH COfn rCj CQ COfn rCj CD O rH H CO CQ CO CO CO CO fH fH fn fn fH fH CQ CQ CQ CQ H H H H cc CQ CQ rH H rH 1 CO I ! 1 1 J 1 | CQ 1 J ! to 1 1 1 I H 1 1 1 H 1 I |1 lO 1 I 1 CO 1 1 CQ ) 1 i CQ 1! il 1 rH 1 ] J rH 0> CQ CO rH to H CQ CQ CQ CQ to to to H H rH H rH H rH H 0
. Composition and treatment of Lake Michigan water . O 03 PhH iH O > Ph CH 1 CD CO •rH P P fn I PJ•H 03 fn fH-d0 *H CD PJ + o o fn rH CO •a!) CO o3 b rH <U sh pi fn Ph o3 PhO 60 60 o CO CQ CO fH ^3CQ CO fH CQ CO fH CQ CO fH cq PJ o co CD fnP ^J•H CD-P P H O O PhCQPJ Ho pJ CO «H O o3 CDfH HrH CO fH CQ to CQH CQ HH HH COfn rCj CQ COfn rCj CD O rH H CO CQ CO CO CO CO fH fH fn fn fH fH CQ CQ CQ CQ H H H H cc CQ CQ rH H rH 1 CO I ! 1 1 J 1 | CQ 1 J ! to 1 1 1 I H 1 1 1 H 1 I |1 lO 1 I 1 CO 1 1 CQ ) 1 i CQ 1! il 1 rH 1 ] J rH 0> CQ CO rH to H CQ CQ CQ CQ to to to H H rH H rH H rH H 00 O H CQ ^ t-O CO CT> H CQ CQ CQ CQ CQ CQ CQ H H rH H H H H rH O O O o O O O o o o O O O o o O o o o o o> H CO to O lO to cn CQH H to o iTi *o COCO • H H rH H H O lO o LTi O lO O LO O • rH H CQ CQ to to LO H CQ to CO o rH o o rH CO -*s SH<D ^3Po fn fHO OrH rH o oo o 1. -58- any practical advantage over the treatment with lime and alum. 7. 7/hen iron sulphate and lime are used for treatment asatisfactory floe is formed in one hour with grains per gallonof iron sulphate and grains per gallon of lime at a cost of§ per million gallons of water treated. 8. Sodium hydroxide with iron sulphate yields a moregelatinous floe than does the lime,but the cost of treatment ismuch greater. 9. Sodium carbonate with iron sulphate forms a gelati-ous floe,but the reaction is much slower than when sodium hydroxideis used. The cost of treatment is also much greater than the treat-ment with lime and iron. 10. T/hen iron sulphate is used as the coagulant, there isdanger of the iron appearing in the filtered water unless the completed before the water goes on the filter. The use of aslight excess of lime hastens the reaction and decreases the danger of iron appearing in the filtered water. 11. A comparison of the lime and alum with the lime andiron
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1909
