oa Civil Engineering = Siviele Ingenieurswese - The removal of solids in the purification of sewage
Mechanical means of screening and degrittor tanks are advocated for the preliminary processes of solids removal. These views are strongly endorsed, especially in the case of larger works. Insofar as settling tank design is concerned it is felt that, to ensure efficient operation, tanks should be designed to satisfy both criteria, viz. detention period and overflow rate. Research is required on plant scale tanks to determine the importance of each design criterion and possibly suggest more rational methods of design. The findings would certainly be most useful.
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