Public works . To/>fiia/f /f/fo As)/mo/r O/P^a/tr cfln o;::-^ /?^m//^ Thn/e PLAN AND SECTIONS OP ACTIAATED PLANT Marcu 4, 1922 !? U B L 1 C W O R K S 155 samples and drawing out sufficient sludge into theconcentration manhole tu keep the proper ratio inthe aeratuig tank and at the same dme obtain aclear etfiuent. When this plan is properly car-ried out, no trouble has been experienced by thesludge turning septic. llie Sludge that has been diverted into the con-centration manhole (which is 8 feet in diameter and14 feet deep) is here dewatered by forcing sulphurdioxide fumes throug
Public works . To/>fiia/f /f/fo As)/mo/r O/P^a/tr cfln o;::-^ /?^m//^ Thn/e PLAN AND SECTIONS OP ACTIAATED PLANT Marcu 4, 1922 !? U B L 1 C W O R K S 155 samples and drawing out sufficient sludge into theconcentration manhole tu keep the proper ratio inthe aeratuig tank and at the same dme obtain aclear etfiuent. When this plan is properly car-ried out, no trouble has been experienced by thesludge turning septic. llie Sludge that has been diverted into the con-centration manhole (which is 8 feet in diameter and14 feet deep) is here dewatered by forcing sulphurdioxide fumes through it by means of a Conners-ville blower from a sulphur burner, and after a fewminutes sedimentation additional sludge is admittedto the tank, forcing the supernatant clear liquid tooverflow. The new mixture is again gased and theoperation repeated until the tank is practically filledwith thick sludge. The process as abo\e outlined is a modification ofthe MacLachlan process, which uses sulphur dioxidewith steam, and was developed by the engineers withthe co-oper
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
