Mitigation of High BOD Levels in Sewage Treatment Plants Using Outfall Storage Solutions

Abstract

This report deals with a situation when the control system at a sewage treatment plant results in plant to be partially bypassed. This results in sewage with high BOD level which varies with time. BOD levels are calculated at several stages throughout the flow system using Microsoft Excel. It is found out that BOD level is above the standard when the water flows into Worm Ville. Therefore, an outfall storage tank is added at the outflow of sewage outfall to control the BOD level at Worm Ville. After successful similar calculations, it was found out that adding a outfall storage was successful in reducing BOD levels and met the standards.