Abstract
The beneficial effect of high wastewater temperature on treatment plant performance and effluent quality is shown, on the basis of full scale activated sludge plant data. The wastewater temperature may be regulated by cooling water reuse. The required cooling water flowrate is analytically and graphically determined. The disposal of the reused warm water into rivers and canals may cause density stratification. From the study of the stratified stream, analytical expressions and graphic presentations of the arrested thermal wedge dimensionless length and shape are given. The graphs are presented in appropriate form for practical applications.
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