bottom air diffuser Articles

  • Integral Model for Turbulent Buoyant Jets in Unbounded Stratified Flows Part 2: Plane Jet Dynamics Resulting from Multiport Diffuser Jets

    Abstract  An integral model for the plane buoyant jet dynamics resulting from the interaction of multiple buoyant jet effluxes spaced along a diffuser line is considered as an extension of the round jet formulation that was proposed in Part I. The receiving fluid is given by an unbounded ambient environment with uniform density or stable density stratification and under stagnant or steady ...


    By Springer

  • The challenges and benefits of local air quality monitoring

    A new generation of air quality monitors is now being offered to provide localised, real-time air quality readings – but the potential benefit is only just starting to be realised. It is generally accepted that whilst measurements from air quality reference stations are highly accurate, they are not sufficiently location-specific. Key pollutants – such as NO2 and PM2.5 ...


    By AQMesh

  • Air Pollution Control: Ready for the 21st Century

    The textile industry is plagued by air pollution problems which must be resolved. In particular, smoke and odor arising in the process require abatement. Air pollution control technology is available today which will serve the textile industry well into the 21st century. The nature of the problem The major air pollution problem in the textile industry occurs during the finishing stages, ...


  • Activated sludge bulking problem solved by AIRE-O2® system

    ' Oxygen profiles on the AIRE-O2® system show good dissolved oxygen levels at both bottom and top levels,' reports the mill Problem In 1987, filamentous bacteria outbreaks in this northern pulp mill’s activated sludge basins were a problem. Anoxic conditions in sludge deposits between its diffuser heads, caused by a lack of mixing, encouraged the growth of Thiothrix . 'This filamentous ...

  • Case History - Air Pollution Control in the Textile Industry: a Technology for the 21st Century

    The textile industry is plagued by air pollution problems which must be resolved. In particular, smoke and odor arising in the process require abatement. Air pollution control technology is available today which will serve the textile industry well into the 21st century. The nature of the problem The major air pollution problem in the textile industry occurs during the finishing stages, ...


  • Textile Industry: Air Pollution Control Through Wet Scrubbers, High Energy Venturi Scrubbers, Packed Bed Scrubbers and Other Technologies

    Wet Scrubbers, High Energy Venturi Scrubbers, Packed Bed Scrubbers are an excellent solution for air pollution in the textile industry. The textile industry is plagued by air pollution problems which must be resolved. In particular, smoke and odor arising in the process require abatement. Air pollution control technology is available today which will serve the textile industry well ...


    By CR Clean Air Group, LLC

  • Prairie farm rehabilitation administration paper

    The aeration efficiency of two types of aeration devices, air injection and mechanical surface aerators was evaluated in farm dugouts in the Peace River Region of Alberta. The air injection systems were tested using three types of diffusers; open-ended tubing, linear fine bubble diffusers and a membrane diffuser. Our results indicate that without aeration, anoxia can develop in the bottom of ...


    By EP Aeration

  • Contain Oil Vapor for Better Reliability

    In a boiler feed pump, an air breather is used to vent the enclosed air space on the bearing housings. With increasing heat and thermal expansion, oil vapors form in the bearing housings and migrate through the air vents. The vapor then condenses in the air filter media saturating the filter with oil. The air breather becomes ineffective, which affects mechanical seals and the overall ...


    By JLM Systems Ltd

  • Oxygen, the fix for pond problems

    Aeration of a water feature should have three main considerations. These include preventing thermal stratification, balancing the dissolved oxygen levels throughout the water column from the sludge or benthic layer to the surface and balancing temperature levels throughout the water column. Although oxygen transfer from certain methods may be significant, the greatest amount of oxygenation takes ...


    By EP Aeration

  • Diphasic transfer of oxygen in vertical flow filters: a modelling approach

    Oxygen renewal, as a prominent phenomenon for aerobic bacterial activity, deeply impacts vertical flow constructed wetland (VFCW) treatment efficiency. The authors introduce a multiphase model able to simulate oxygen transfer in VFCWs. It is based on a two-phase flow module, and a transport module. The transport module is able to deal with convection/diffusion phenomena, inter-phase (air–water) ...


    By IWA Publishing

  • Water and vapor movement with condensation and evaporation in a sandy column

    The diffusion of warm, humid air into an initially cold, dry, sandy column was analyzed to study the movement of water vapor and liquid water under nonisothermal and low water content conditions. The analysis was performed using the HYDRUS-1D code. While the water retention curve of sand was measured experimentally, the unsaturated hydraulic conductivity function was inversely estimated from the ...

  • Use of biocatalysts to reduce hydrogen sulfide emissions from lagoons and landfills

    Emission of odors from ponds and lagoons occurs due to aerobic and anaerobic decomposition of organic solids to release hydrogen sulfide, ammonia, and other organic by-products.  Aerobic biodegradation occurs near the water-air interface, where diffusion of oxygen occurs, while anaerobic degradation prevails mainly near the bottom of the pond or lagoon, where there is low or no dissolved oxygen ...


    By PRD Tech, Inc.

  • Integration of nitrification and denitrification by combining anoxic and aerobic conditions in a membrane bioreactor

    A membrane bioreactor (MBR) was developed to achieve nitrogen removal by combining nitrification and denitrification conditions in one reactor. The activated sludge was alternated between aerobic and anoxic conditions using peristaltic pump. The biomass concentration and floc morphological properties were observed to be similar in anoxic and aerobic compartments. However, the homogeneous ...


    By IWA Publishing

  • 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

  • Properties and Behavior of Nonhalogenated VOC`s

    An important consideration when evaluating a remedy is whether the compound is nonhalogenated or halogenated. A nonhalogenated compound is one which does not have a halogen (e.g., fluorine, chlorine, bromine, or iodine) attached to it. The vendor of the technology being evaluated must be informed whether the compounds to be treated are nonhalogenated or halogenated. In most instances, the vendor ...

  • 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 ...

  • 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 ...

  • Case study - SBR keeps noise, energy & capital costs low

    Pennsylvania is home to one of the first Argos® SBR plants to utilize a surface mounted process aerator/mixer, which is a significant improvement over the traditional diffused air network designs. The new layout offers substantial capital investment savings as well as significant reductions in ...

  • Properties and Behavior of Halogenated VOCs

    An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen (e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated ...

  • Ozone Brings Better Bottled Water

    The proliferation of bottled beverages worldwide and an increased awareness of consumer health issues have beverage bottlers rethinking how to keep their liquids safe for consumption. One problem they face is the need to deliver a product that is free of bacteria, to provide extended shelf life and product quality. Ozone has quickly become the disinfectant of choice among water bottlers ...

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