Public works . roblems to handle. Hencethe separate sludge digestion chamber. This struc- 242 PUBLIC WORKS Vol. 52, No. 14 ture is eight feet by six feet by eight feet deep andis built adjacent to the separation tank. It is pro-vided with an eight-inch sludge pipe and valvethrough which the digested bottom sludge may bewithdrawn from the separation tank, and also a10-inch sluice gate located 1 ft. below the flow is planned to dose the effluent from this fankover a broken-stone sprinkling bed at the standardrate for installations of this nature. The advantages of this arrangement are—1.
Public works . roblems to handle. Hencethe separate sludge digestion chamber. This struc- 242 PUBLIC WORKS Vol. 52, No. 14 ture is eight feet by six feet by eight feet deep andis built adjacent to the separation tank. It is pro-vided with an eight-inch sludge pipe and valvethrough which the digested bottom sludge may bewithdrawn from the separation tank, and also a10-inch sluice gate located 1 ft. below the flow is planned to dose the effluent from this fankover a broken-stone sprinkling bed at the standardrate for installations of this nature. The advantages of this arrangement are—1. Bywithdrawing bottom sludge, the floating mat islowered and mixed with the incoming fresh sewage,causing a breaking up of the mat and stimulatingdigestion of the floating particles. 2. The mat maybe withdrawn into the digestion tank, mixing di-rectly with the bottom sludge, and may be leftstanding for such time as may be required forcomplete digestion of the entire mass. 3. The mat S/„* 3-.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
