EXPERIMENTAL RESEARCHES ON AERATION EQUIPMENT USED IN BIOLOGICAL WASTEWATER TREATMENT

Biological treatment is one of the most efficient process to remove biodegradable pollutants from wastewater. In practice, this process use air and activated sludge for well over a century. It is largely influenced by aeration equipment, which in addition to introducing oxygen into wastewater for ox...

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Bibliographic Details
Published inInternational Multidisciplinary Scientific GeoConference : SGEM Vol. 17; pp. 359 - 365
Main Authors Corina, Boncescu, Diana, Robescu Lacramioara
Format Conference Proceeding
LanguageEnglish
Published Sofia Surveying Geology & Mining Ecology Management (SGEM) 01.01.2017
Subjects
Activated sludge
Aeration
Aerators
Air
Biodegradability
Biodegradation
Biological treatment
Biological wastewater treatment
Chemical engineering
Efficiency
Energy consumption
Hydrodynamics
Microorganisms
Oxidation
Oxygen
Oxygen consumption
Oxygen transfer
Pollutant removal
Pollutants
Power consumption
Power efficiency
Sedimentation
Sludge
Velocity
Wastewater
Wastewater oxidation
Wastewater pollution
Wastewater treatment
Wastewater treatment plants
Water treatment
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Summary:Biological treatment is one of the most efficient process to remove biodegradable pollutants from wastewater. In practice, this process use air and activated sludge for well over a century. It is largely influenced by aeration equipment, which in addition to introducing oxygen into wastewater for oxidation of organic pollutants, they have to create hydrodynamic conditions to mix wastewater with microorganisms and with air, avoiding dead zones and microorganisms sedimentation. This stage of wastewater treatment is energy intensive and represents approximately 60% of total power consumption of the wastewater treatment plant. The paper presents experimental researches on various aeration systems regarding velocities induced by equipment into wastewater, power consumption and oxygen transfer efficiency. It was tested equipment for diffused-air aeration and mechanical aerators (surface aerators or immersed aerators) with different power consumption. Based on the results it is proposed a method to compare the aeration systems.
ISSN:1314-2704
DOI:10.5593/sgem2017/52