surface aerator Articles

  • Vortex in baffled surface aerator

    Baffled surface aerator and mixing tanks are different on the basis of the rotor placement. In mixing tanks, rotors are placed very deep in the tank, thus vortex creation can be prevented by placing the baffles. By definition, rotors are placed at or near the surface of water in surface aeration systems; complete prevention of vortex creation cannot be achieved by installing the baffles. Vortex ...


    By Inderscience Publishers

  • 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 ...

  • 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 ...

  • Turbulence in continuous flow surface aeration systems

    Turbulence characteristics in an optimal continuous surface aeration system were investigated in this study. The experimental system consists of a rectangular tank, where flow is driven by equally spaced aerators placed on the liquid surface. The mass-transfer coefficient and turbulent parameters at the tank's inlet and outlet were measured to enable analysis of their interdependent ...


    By IWA Publishing

  • 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 ...

  • Rectangular tank surface aerators: scale up criteria and energy conservation

    Surface aeration experiments were conducted in two types of rectangular tanks of aspect ratios i.e., length to width ratio (L/W) of 1.5 and 2 and developed simulation equations to correlate the oxygen transfer coefficient, k and power number, P0 with a parameter governing theoretical power per unit volume X. The parameter X is defined as equal to F4/3R1/3, where F and R are impellers’ Froude and ...

  • Influence of aeration and permeate flux on deposition of particulates on membrane surface

    In microfiltration, a deposit of foulant tends to form on the membrane surface and this usually controls the performance of the filtration process. This paper discusses the influence of physical parameters such as aeration and permeates flux on migration and deposition of above micron particles on the membrane surface. Kaolin clay suspension of particle 3.7–8▒μm with mean particle diameter 4.1▒μm ...


    By IWA Publishing

  • The principles of aeration and mixing utilizing process aerator technology

    Aeration and mixing are necessary elements for aerobic biological wastewater treatment processes to maintain a healthy, stabilized biological population and thus, insure optimal treatment of the wastewater assuming there is adequate contact time and substrate available. In the design of wastewater treatment plants, aeration typically involves supply of both oxygen and mixing. Aeration is a large ...

  • The role of aeration in water features

    In warm weather, the surface of your lovely water feature sucdenly develops a green, slimy mass which looks as if it may begin to pulsate, eave the water, and threaten the surrounding countryside, like the monstrous entity in some early Steve McQueen B movie Your instinct may be to use extreme measures - the chemical equivalent of calling in the National Guard for a tactical nuclear strike. ...


    By EP Aeration

  • Choosing Aeration Blowers

    Introduction Infrastructure spending in the United States has not kept pace with the population growth and many wastewater treatment plants are at peak capacity. The nation's wastewater systems and their ratepayers face a major challenge in funding the expansion, replacement, and maintenance of aging infrastructure over the next several decades. For this reason, plant engineers and ...


    By Kaeser Kompressoren GmbH

  • The effect of length of free-surface gated circular conduit on air-demand ratio and aeration efficiency

    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 ...


    By IWA Publishing

  • Optimization of submerged depth of surface aerators for a carrousel oxidation ditch based on large eddy simulation with Smagorinsky model

    This paper is concerned with the simulation and experimental study of hydraulic characteristics in a pilot Carrousel oxidation ditch for the optimization of submerged depth ratio of surface aerators. The simulation was based on the large eddy simulation with the Smagorinsky model, and the velocity was monitored in the ditches with an acoustic Doppler velocimeter method. Comparisons of the ...


    By IWA Publishing

  • Lagoon Aeration - Sleep Eye, MN

    Mazzei Aeration System Solves Lagoon Odors and High Maintenance Problems Sleepy Eye, MN The Problem: A large vegetable processing facility in central Minnesota was experiencing problems with its lagoon surface aerators. The company’s treatment process includes a collection and screening assembly, two anaerobic stabilization ponds and a 40 million gallon aerated lagoon. The aeration lagoon ...


    By Mazzei Injector Company, LLC

  • Wastewater lagoons – a new aeration concept

    The use of wastewater treatment lagoons, or stabilization ponds, is a common practice for rural municipalities and industrial facilities. Through the years there have been numerous designs for these ‘sludge settling basins,’ ranging from facultative, partial aerated, and fully aerated systems. But the primary reason for these systems is to utilize relatively shallow earthen ponds, or ...


    By Reliant Water Technologies

  • Aerators Enhance Aerobic Digestion Process

    The city of Eden,N.C.,operates an extended aeration process designed for an average flow rate of 13.5 mgd with a mixed liquor suspended solids concentration that typically checks in about 6,000 mg/l. This high biomass concentration is necessary to provide a well-settling sludge and good effluent quality. Further, the plant influent is approximately 40% domestic wastewater and 60% industrial ...


    By S & N Airoflo, Inc.

  • Case study - Aeration ditch upgrade exceeds expectations

    Triton Process Aerators Meets Future Nitrogen Permit Regulations When the a Pennsylvania Sewer Authority was researching methods to improve the dissolved oxygen levels in its wastewater treatment plant’s oxidation ditches in 2001, they decided to totally replace its aging brush rotor system. They replaced the rotors with the  ...

  • Efficient aeration system boosts energy savings

    A new efficient aeration system saves the Ontario, Ore., wastewater treatment facility $47,000 annually in energy costs. Besides giving this community a financial boost, the new system netted additional equipment cost savings by cutting aeration horsepower by more than half at the plant. The environmentally conscious city, located in the Oregon/Idaho border area, is meeting all of its effluent ...

  • Real-Time Control Optimizes Extended Aeration Processes

    The population of Hillsborough County, Florida has doubled since the Valrico advanced wastewater treatment plant (AWTP) was built in 1990 to treat the sewage of several small communities west of the City of Tampa. When it began operation, the Valrico AWTP capacity was only 4 MGD; small when compared to Tampa's 96 MGD Howard F. Curren AWTP located not far to the east. But Valrico serves as a very ...

  • Slowhill Copse UK Aerators - Case Study

    Slowhill Copse Marchwood WTW (Southampton, Hampshire) was originally constructed in the 1960's. The latest upgrade includes an improvement of the existing treatment process to meet the newest requirements. Landustrie supplied sixteen (4 per aeration lane) low speed surface aerators, type Landy-7 complete with drive units, bottom baffles and foundation plates. The Landy aerators dimension ...


    By Landustrie Sneek BV

  • Alpha Factors in Full-Scale Wastewater Aeration Systems

    ABSTRACTSurface active agents depress gas transfer at gas-liquid interfaces. They are present as measurable trace contaminants at all environmental and at most industrial gas-liquid interfaces. This paper presents the results of several studies, including lab and full scale studies that show the depression of gas transfer, usually quantified by the alpha factor, can be related to the Reynolds ...

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