Current designs of sanitary collection systems normally only consider the transport of
wastewater without attention on the air movement in the sewer airspaces. Under anaerobic …

A physical model study was conducted to investigate the mechanisms of air entrainment in a
tall plunging dropshaft of 7.7 m in height. The water flow in the dropshaft was observed to …

With the development of urban areas, many municipalities are facing issues where the flow
velocity in their sewer systems is relatively high at various locations. This is because of …

Understanding hydrogen sulfide (H 2 S) emission into sewer air space and the rate of
ventilation to the atmosphere is important in preventing/mitigating odor and corrosion …

Modeling air movement in sewer systems is important because of its importance in
addressing sewer odor issues and pipe corrosion. In this study, a steady-state model was …

In urban drainage systems, falling sewage in drop structures expedites the mass transfer of
hydrogen sulfide (H 2 S) and oxygen (O 2). This process is important for sewer odor and …

The deep tunnel stormwater system, consisting of dropshafts and underground tunnels, is
used to alleviate or prevent urban water problems associated with extreme rainfall events …

Hydrogen sulfide (H 2 S) is a primary cause of odor and corrosion in sewer systems. In drop
structures, falling wastewater im**es the surface of bottom water pool as a jet or numerous …

This paper designs and builds a stormwater pipe-river/channel experimental system at the
first attempt to observe hydraulic dynamics between pipe flow and downstream water levels …

This paper presents experimental and numerical results of air movement in sewer pipes.
Both the airflow in a straight pipe and pipes with changing slopes were studied. The result …