Sewage disposal . ig. 13. Sewage Screen Cleaned by Mechanical Raikes (copiedby permission from Raikes, 1908). of Haslingden, which is provided with special appliances forcleaning the rakes (Fig. 13). There is a famous installation of bar screens cleaned by power-driven rakes at the Clichy pumping station of the Paris sewer-age system. A peculiarity of this installation lies in the factthat the bars are inclined upstream. The most important planton this continent employing the principle of mechanical cleaningof fixed screens is in operation at Toronto, Can. MECHANICALLY OPERATED FINE-MESH SCREE
Sewage disposal . ig. 13. Sewage Screen Cleaned by Mechanical Raikes (copiedby permission from Raikes, 1908). of Haslingden, which is provided with special appliances forcleaning the rakes (Fig. 13). There is a famous installation of bar screens cleaned by power-driven rakes at the Clichy pumping station of the Paris sewer-age system. A peculiarity of this installation lies in the factthat the bars are inclined upstream. The most important planton this continent employing the principle of mechanical cleaningof fixed screens is in operation at Toronto, Can. MECHANICALLY OPERATED FINE-MESH SCREENS 71 Mechanically Operated Fine-mesh Screens. With an in-creasing recognition of the importance of screening out the finersuspended solids from sewage, much thought has been given,particularly in Germany, to the design of fine-mesh screenswhich would produce a high degree of clarification. Since itwould be obviously uneconomical to attempt to clean suchscreens by hand they are invariably arranged for some form of. ;BAND SCREEN . Z-WING SCREEN
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