. Composition and treatment of Lake Michigan water . ft-ri-nft 0rH CO H «* CM C?> t> CO CO H CM CM CM H H rH H rH H H H H rH H H H rH rH rH H rH CO O CM O to a c5 P rfl •H -P p. HOPCD rH PP O 03• -P ■» P rH S3 1 CDH P «H aJ «H P4^ CQrH a ft rH I CD HPh-h s rH 1 CD rHftH o•IJ. Pio •H o o o O O O O O O o O 00 CM H to H <o rH tX)H COH H C\2 H CM H CM to CM SI1 o o o O O o O O O o O CO H <o rH tOH oH COrH o CM o CM O Q-iCM o o o CM H P o p CQ0 09o CDO 03CO d P O CD rH CQ •H H 03P•HCJrH So Or W ft aJ O la; 03 P rH • •H CD rH O crJ ft aJ co rH CD o cr. CJ in CO O to to CM H o o CO rH o C
. Composition and treatment of Lake Michigan water . ft-ri-nft 0rH CO H «* CM C?> t> CO CO H CM CM CM H H rH H rH H H H H rH H H H rH rH rH H rH CO O CM O to a c5 P rfl •H -P p. HOPCD rH PP O 03• -P ■» P rH S3 1 CDH P «H aJ «H P4^ CQrH a ft rH I CD HPh-h s rH 1 CD rHftH o•IJ. Pio •H o o o O O O O O O o O 00 CM H to H <o rH tX)H COH H C\2 H CM H CM to CM SI1 o o o O O o O O O o O CO H <o rH tOH oH COrH o CM o CM O Q-iCM o o o CM H P o p CQ0 09o CDO 03CO d P O CD rH CQ •H H 03P•HCJrH So Or W ft aJ O la; 03 P rH • •H CD rH O crJ ft aJ co rH CD o cr. CJ in CO O to to CM H o o CO rH o CO tO • • • • • • • • • rH rH rH CM CM CM CM o O LO O in O m O rH H CM CM to to m CM tO o CO a* o H I I rH CJ 03 CD rH rP O PH O 1 O J O I P I I I I I I II I. -55- The results of treatment with iron sulphate and sodiumcarbonate are shown in Table XX. The floe produced is gelatinousand similar to that produced by sodium hydroxide. The greaterlength of time required for the reaction makes the sodium carbonateless desirable than the sodium hydroxide. Because of its greatercost this treatment is net so practical as the treatment with limeand iron. CCrGLUSIClI. A careful consideration of the preceeding data shows that, 1. Lake Michigan water is seriously polluted and shouldbe purified before it is used for drinking. 2. Llechanical filtration is a most satisfactory andeconomical method of purifying the lake water. 3. Treatment of the lake water with lime alone softensthe water but does net yield a satisfactory floe for purification. 4. Treatment with alum alone recpuires 2 l/2 grains pergallon of alum in order that a good floe may be formed in less thanone hour. 5. Vfhen alum and lime are used for treatment a good floeis obtained in one-half hour
Size: 1289px × 1938px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1909
