Development of a computer programme for the design of municipal wastewater treatment facilities Part 5: secondary clarifier

Abstract

A computer programme was developed using Fortran programming language utilizing IBM-PC compatible microcomputers to design a secondary clarifier in a centralised municipal wastewater treatment plant. The programme is used to design the dimension and capacity of four circular secondary clarifiers including the influent and effluent structure to satisfy the specified design criteria such as the detention time, the overflow rate, solid-loading rates and weir loading. The programme was written in a subroutine called from the main programme which also be able to call other subroutines for designing other facilities in the treatment plant. The programme runs successfully given the right input data. The results are easy to interpret and automatically appear either on the computer screen or in an output file