Oxygen uptake rate in a free surface flow

Author : Elena Maria Iatan

Abstract :The occurrence of anaerobic conditions is inevitable in sewers, these conditions lead to hydrogen sulfide formation which is directly linked to the corrosion of the collector concrete. Sewer pipes subject to corrosion require rehabilitation and permanent assessment of risk areas. Oxygen is considered an ideal presence to keep the occurrence of hydrogen sulfide under control. The introduction of air prevents the formation of an anaerobic environment and certain procedures have been used to control the production of sulfides in sewer networks. Surface aeration can introduce a significant amount of oxygen into the sewer in pipes with steep slopes but main collectors usually, do not have significant slopes. To estimate the re-aeration coefficient, empirical relationships were used based on easily measurable flow quantities, with very different results.

Keywords :Oxygenation Strategies to Limit Hydrogen Sulfide in Sewer Networks

Conference Name :International Conference on Environment Science and Engineering (ICESE-25)

Conference Place Florence, Italy

Conference Date 10th Nov 2025