Sewage disposal . obe J3COT3 O IH THE CONSTRUCTION OF AN ACTIVATED SLUDGE PLANT 399 which delivered it to a separator and then to a pulsation-and-moisture-reducing steel tank 3 feet in diameter and 6 feet compressor operated at a pressure of 9 pounds per squareinch with feet of sewage above the plates and compressed. Fig. 122. General View of Activated Sludge Plant at Cleveland. about 450 cubic feet of free air per minute. The filtros plateswere set with sulphur joints in a steel box. Activated sludge plants at Houston, Texas, with a total ca-pacity of 19 million gallons per day,
Sewage disposal . obe J3COT3 O IH THE CONSTRUCTION OF AN ACTIVATED SLUDGE PLANT 399 which delivered it to a separator and then to a pulsation-and-moisture-reducing steel tank 3 feet in diameter and 6 feet compressor operated at a pressure of 9 pounds per squareinch with feet of sewage above the plates and compressed. Fig. 122. General View of Activated Sludge Plant at Cleveland. about 450 cubic feet of free air per minute. The filtros plateswere set with sulphur joints in a steel box. Activated sludge plants at Houston, Texas, with a total ca-pacity of 19 million gallons per day, were designed along verysimilar plans (Williford, 1917), The plants are built up of 6units, each having a capacity of 3,150,000 gallons per day. Eachunit includes a rectangular continuous flow aeration tank (18feet wide and 280 feet long with an effective depth of 9 feet 9inches), a battery of 10 vertical flow sedimentation tanks and 1sludge re-aeration tank. The ratio of aerator surface to tanksurface is 1 to 7| and air is supplied under a pressure of 5jpounds per square inch at a rate of cubic foot of free airjperminute per square foot of tank surface. The aeration tankswere designed for an average detention period of 1 hour 50 min- 400 TREATMENT BY THE ACTIVATED SLUDGE PROCESS utes. The sludge is to be re-aerated
Size: 1772px × 1410px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1919
