. ONTARIO SESSIONAL PAPERS, 1914, lly all suspended matter; in twenty minutes the settlement of all the grossermatter had taken place, only very finely divided matter remaining in would be readily retained in an Imhoff tank. The sludge collected in the sedimentation tanks, used in connection withthe sprinkling filter effluent has some very objectionable features. It does notdry readily and has a most unpleasant odor, due probably to the large numberof dead worms in it. On storage, under the conditions obtaining in the storagechamber of an Imhoff tank, it would become
. ONTARIO SESSIONAL PAPERS, 1914, lly all suspended matter; in twenty minutes the settlement of all the grossermatter had taken place, only very finely divided matter remaining in would be readily retained in an Imhoff tank. The sludge collected in the sedimentation tanks, used in connection withthe sprinkling filter effluent has some very objectionable features. It does notdry readily and has a most unpleasant odor, due probably to the large numberof dead worms in it. On storage, under the conditions obtaining in the storagechamber of an Imhoff tank, it would become very similar to an ordinary Imhoffsludge, non-odorous and readily drying. Therefore, the best type of sedimentationtank would be the double chamber type, giving a length of storage of at leasttwenty minutes in the upper chamber and from one to three months in the lower chamber. .Anav-;es of Sludtre in Ktliijeiit of IJaclerial BedsFertilizer Coustitueiils. Total Nitrogen % Total Phosphoric Acid % Potash Grease % Ash %. This incubator is large enough to tuutaiu 105, daily routine, samples of wateror sewage. Experimental Station, 1913.
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