Aeration is the process of bringing water and air into close contact in order to increase dissolved oxygen concentration. The concentration of dissolved oxygen is an important indicator of water quality because aquatic life lives on the dissolved oxygen in the water. The hydraulic structures can be accepted as the key components in increasing dissolved oxygen concentration because of the strong turbulent mixing associated with substantial air bubble entrainment at these structures. Closed conduit is a classic example of a hydraulic structure where aeration occurs. This work focused on determining the effect of conduit length on air-demand ratio and aeration efficiency in free-surface gated circular conduits. Experimental results showed that the Froude number had an important effect on the air-demand ratio and the aeration efficiency. The effect of the conduit length on the air-demand ratio and the aeration efficiency changed depending on the Froude number. It was demonstrated from the results that a free-surface gated circular conduit flow system had high efficiency in transferring oxygen from air bubbles to water. Moreover, a formula for the aeration efficiency was presented relating the aeration efficiency to the conduit length and the Froude number.
- IWA Publishing
- The effect of length of free-surface gated circular conduit on ...
Achieve Performance Requirements by Combining Surface Aeration with Diffused Aeration Systems
Aeration Industries International’s Aire-O2 Triton® can bring a struggling diffused air basin back up to speed quickly by adding oxygen capacity. Benefits of combining Aire-O2 Triton Aerators and Diffused Air Systems: Instant capacity (SOTR) increase without the need to interrupt production or drain the basin Increase aeration efficiency (SAE) with consistent aeration Keep solids in suspension with mixing-only option; when oxygen demand is low, Aire-O2 Triton blowers can be turned off to save...
The climb to the top
Back in the late 1980’s when market drivers created the cost-effective option of using above-ground circular tanks for industrial activated sludge processes, there were some early valuable lessons for both aeration equipment manufacturers and plant operators.As production plants got away from in-ground basins, one of the more simple innate operational checks became more challenging; that being the view of the aeration basin water surface. For years, a plant operator could simply look at the basin from...
Combining surface aeration and diffused aeration improves chemical effluent quality
“The greatest advantage we see with the Aire-O2 Tritons, is the aeration tank does not need to be emptied in order to maintain the equipment; saving us both time and resources and with no interruption to production.”Overview Daurala Organics Limited, a chemical producer in Daurala, India, manages 1600 m3/d flow in their activated sludge process plant. Daurala has two aeration tanks that treat flows of 1800 m3/d and 980 m3/d from the manufacturing of chemicals like Benzaldehyde and Sodium Sulfate.Challe...
Combining Surface Aeration and Diffused Aeration Improves Chemical Effluent Quality
“The greatest advantage we see with the Aire-O2 Tritons, is the aeration tank does not need to be emptiedin order to maintain the equipment;savingus both time and resources and with no interruption to production.” Overview Daurala Organics Limited, a chemical producer in Daurala, India, manages 1600 m3/dflow in their activated sludge process plant. Daurala has two aeration tanks that treat flows of 1800 m3/dand 980 m3/dfrom the manufacturing of chemicals like Benzaldehyde and Sodium Sulfate. Challeng...
Sugar Beet Harvest Simplified with Aire-O2 Tritons - Case Study
Overview: Sucrafor, a COSUMAR Groupe sugar beet processing plant in north east (Oriental) ofMorocco, designed a wastewater treatment plant to maintain high organic loads through anaerobic, anoxic, and aerated lagoons; as they crush more than 5,000 tons of sugar beets daily. Due to the high organic loads and tightening BOD/COD standards, Aeration Industries International’s Aire-O2 Tritons® were installed in 2013. Challenge: The plant operates for 90 days during beet processing and the aeration equipment...