Public works . he 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-operation of the AlacLachlan ReductionProcess Company, which furnished the equipment. The sludge, after this treatment, is lifted fromthe tank by a Goulds 7x10 triplex plunger pumpunder pressure into a 40-pIate 40-inch filter pressof the old G. H. Bushnell
Public works . he 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-operation of the AlacLachlan ReductionProcess Company, which furnished the equipment. The sludge, after this treatment, is lifted fromthe tank by a Goulds 7x10 triplex plunger pumpunder pressure into a 40-pIate 40-inch filter pressof the old G. H. Bushnell type. A good cake isnow being obtained, and tests will be made at onceto develop a satisfactory control. After a pressinghas been made, the plates are opened up and thesludge cake falls into a concrete trough beneath thepress. In this trough there is a helical conveyor,operated by a motor connected to the shaft by asilent chain drive. This conveyor revolves at aspeed of 48 revolutions per minute and carries the. cake through the walls of the building into cartsoutside and thence it is hauled away to other partsof the properly and piled up. The conveying ap-paratus was furnished by the Carbondale Machin-ery Company of Carbondale, Pa. 1 he plant at the present time is handling aboutone million gallons of sewage daily and about 13,000gals, of .--ludge is being drawn out for pressingdaily, but the press is operated only on alternatedays for a period of four hours for a completeoperation. The machinery is housed in a brick power houseadjacent to the plant which is 27 feet by 37 feetinside. All machinery is motor driven and con-sists of the following: Two Nash air compressors direct connected to a60 h. p. motor of the slip ring, variable speed typethrough a Turbo Gear of ratio to 1 made bjthe Poole Engineering and Machinery Company. One Goulds 7x10 triplex plunger pump directconnected to a 20 h. p. slip ring, variable speedmotor. One sulphur burner revolved by a 1-4 h. p. motolth
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
