surface water aeration 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

  • 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

  • AVEDØRE (Denmark) Municipal WWTP - Case Study

    Number of Tanks: 4 Total Volume: 80,000 m³ Water Depth: 3.5 m SOTR Standard Oxygen Transfer Rate: 4,270 kgO2/h Total Airflow: 58,720 Nm3/h No. of AEROSTRIP® Diffusers: 1,600 Avedøre is part of the suburbs in the south-west of Denmark’s capital ...


    By Aquaconsult Anlagenbau GmbH

  • 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 ...

  • Data Requirements for Ground Water, Surface Water, and Leachate

    It is common for ground water to be contaminated with the water soluble substances found in overlying soils. Many of the required data elements are similar, e.g., pH, TOC, BOD, COD, oil and grease, contaminant identification and quantification, and soil and aquifer characterization. Additional water quality monitoring data elements include hardness, ammonia, total dissolved solids, and metals ...

  • 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 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

  • Common Treatment Technologies for Nonhalogenated VOCs in Ground Water, Surface Water and Leachate

    It may be necessary to know other subsurface information to provide remediation of VOCs in the ground water. Treatability studies to characterize the biodegradability may be needed for any biodegradation technology. Treatability studies are usually necessary to ensure that the contaminated ground water can be treated effectively at the design flow. A subsurface geologic characterization would be ...

  • 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

  • Common Treatment Technologies for Fuels in Ground Water, Surface Water, and Leachate

    It may be necessary to know other subsurface information to remediate fuels in ground water. Treatability testing to characterize contaminant biodegradability and nutrient content may be needed for any biodegradation technology. A subsurface geologic characterization would be particularly important to characterize the migration of NAPLs. Recovery tests are usually necessary to design a ...

  • Common Treatment Technologies for Halogenated VOCs in Ground Water, Surface Water and Leachate

    It may be necessary to know other subsurface information to provide remediation of VOCs in the ground water. Treatability studies to characterize the biodegradability may be needed for any biodegradation technologies. Treatability studies are usually necessary to ensure that the contaminated ground water can be treated effectively at the design flow. A subsurface geologic characterization would ...

  • 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.

  • Monitoring of typical pumps and aerator in a water treatment plant - Case Study

    Equipment, Context: Surface aerator:Vertical equipment, gearbox associated very high cost for wired solution, aggressive environment, very few visual and periodical inspections. Centrifugal pump: Located underground in concrete basement, busy area, pipes and metal structure all around. Effluent pump: Vertical equipment, ...


    By Wi-Care

  • Supporting constructed wetlands in P removal efficiency from surface water

    The research investigated the implementation of suspended reactive filters to support the phosphorus (P) removal efficiency of constructed wetlands (CWs). The reactive material (RM) used in this study was autoclaved aerated concrete (AAC). The laboratory experiment consists of four plastic boxes filled with the volume of 10 L of artificial P solution with three variants of RM mass to volume ...


    By IWA Publishing

  • 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 ...

  • 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 ...

  • Solar grease trap aerator works day and night

    Solar Grease Trap Aeration Systems were developed to solve Odor and Water Quality Problems. Solar Grease Trap Aeration Systems will remove and avoid odor problems while also improving overall water quality without the need for Chemicals, Bacterias, and /or Ozone. This allows the restaurant owner to become more effective and efficient immediately. They can pay off the investment within 1-6 ...


  • Research on applying a water-lifting aerator to inhibit the growth of algae in a source-water reservoir

    A new hydraulic, water-lifting aerator was developed for ameliorating water quality. It aims at mixing lower and upper water bodies, controlling algae growth, increasing dissolved oxygen concentration in water and inhibiting the release of pollutants from sediments. This new device was applied to control the algae growth in surface water of the water source of Tianjin. It was found that the ...


    By Inderscience Publishers

  • 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  ...

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