daf separator Articles

  • Tracer experiment and RTD analysis of DAF separator with bar-type baffles

    This paper describes the development of a new dissolved air flotation (DAF) separator with a flow streamlining baffle to improve solid separation efficiency. The analysis of the RTD (residence time distribution) curves indicated that the parameter θ10 (dimensionless time at which 10% of tracer has discharged) increased from 0.38 for control reactor to 0.54 for the ...


    By IWA Publishing

  • Upgrading Pre-Existing DAF Clarifiers

    Whether a Mill is pursuing a facility wide directive to reduce water consumption or simply looking for better performance from a presently installed DAF clarifier, the advancements discussed in this overview offer proven techniques to optimize existing DAF system operations. Significant operational cost reductions can be achieved with DAF System Upgrades. In addition, increasing DAF performance ...


    By World Water Works, Inc.

  • Energy & Environmental Technology- Solid - Liquid Separation Technology

    Tajhiz Sanaat Baran's mission is to be the provider in the Environmental & Energy Solutions. Our purpose in Energy fields is directed to the engineering consultants and offering update technologies in consumption optimizing and energy saving of Buildings and Factories. In the Environmental fields, we offer High-Tech solutions and make equipment in Water Treatment, Industrial and Sanitary ...


    By TSB Co.

  • Dissolved air flotation separation for pretreatment of membrane bioreactor in domestic wastewater treatment

    Due to requiring higher water quality standards over time, new technologies are being employed for wastewater treatment. Dissolved air flotation (DAF) and membrane bioreactor (MBR) technologies are widely employed as new technologies in wastewater treatment. DAF is used due to its excellent separation capability of suspended solids as well as oily material. MBR is used because it may provide a ...


    By IWA Publishing

  • Flotation of algae for water reuse and biomass production: role of zeta potential and surfactant to separate algal particles

    The effect of chemical coagulation and biological auto-flocculation relative to zeta potential was examined to compare flotation and sedimentation separation processes for algae harvesting. Experiments revealed that microalgae separation is related to auto-flocculation of Anabaena spp. and requires chemical coagulation for the whole period of microalgae cultivation. In addition, microalgae ...


    By IWA Publishing

  • Feasibility study of high-rate dissolved air flotation process for rapid wastewater treatment

    One advantage of the flotation system is its high applicability as a compact facility. Recently, research for the introduction of additional high-rate dissolved air flotation (DAF) into conventional water treatment plants has been progressing in areas of remodeling water treatment plants, advanced treatment, and combined sewer overflow (CSO) treatment. For successful design and operation of ...


    By IWA Publishing

  • The development and application of centrifugal flotation systems in wastewater treatment

    Flotation as a wastewater treatment technique is designed to remove all particles generally encountered as very fine emulsions, suspended solids, and colloids from wastewater. Historically, Dissolved Air Flotation (DAF) has been used to achieve this removal. More recently, other flotation techniques such as induced air, electro, cavitational, and Centrifugal Flotation Systems (CFS) have been ...


    By Inderscience Publishers

  • Evaluation of flow hydrodynamics in a pilot-scale dissolved air flotation tank: a comparison between CFD and experimental measurements

    Computational fluid dynamics (CFD) models of dissolved air flotation (DAF) have shown formation of stratified flow (back and forth horizontal flow layers at the top of the separation zone) and its impact on improved DAF efficiency. However, there has been a lack of experimental validation of CFD predictions, especially in the presence of solid particles. In this work, for the first time, both ...


    By IWA Publishing

  • Elverum - Norway case study

    Background The existing chemical treatment plant at Elverum municipality in Norway needed an upgrade in order to handle increased load and stringent demands. Considerable food industrial activities resulted in temporary overload and sludge handling problems. An upgrade of the plant was needed and the new plant was also expected tbe designed for easy future upgrade of the biological stage. A fl ...

  • Poultry Processing Facility Wastewater Treatment

    This chicken slaughter and processing facility has a wastewater system that treats 1.2 MGD. Their process uses ferric chloride as the coagulant, caustic to stabilize the pH and an anionic polymer prior to separation in the DAF units. The facility also does some further processing with addition of seasoning and brines which add TDS/EC to the water. The ferric/anionic polymer combination is ...


    By Integrated Engineers Inc.

  • Evaluation of flow hydrodynamics in a pilot-scale dissolved air flotation tank: a comparison between CFD and experimental measurements

    Computational fluid dynamics (CFD) models of dissolved air flotation (DAF) have shown formation of stratified flow (back and forth horizontal flow layers at the top of the separation zone) and its impact on improved DAF efficiency. However, there has been a lack of experimental validation of CFD predictions, especially in the presence of solid particles. In this work, for the first time, both ...


    By IWA Publishing

  • Dairy Installation

    The customer is a producer of dairy products including: milk, cheese, sour cream, butter and yogurt. In Sao Paulo City as in many large cities, the industries have to pay to discharge to the municipal wastewater system. This dairy was no exception. The immediate challenges they were facing were scaling issues ...


    By Biowater Technology

  • Simple protocols for assessing dissolved air flotation systems: quantification of released air, bubble density and cloud patterns

    Dissolved air flotation (DAF) systems are useful for many water treatment applications. Optimizing a DAF system can be very difficult and complicated due to a multitude of variables that contribute to effective separation. Pressure, temperature, retention time and air mixing affect the ability of the saturator to increase air solubility, while baffle heights, flow rates and recycle ratios affect ...


    By IWA Publishing

  • Municipal Innbygda, Norway case study

    Project Name: Innbygda WWTP Location: Trysil, Norway Type of Plant: Municipal Technology Used: CFAS + DAF Separation (chemical precipitation of P) Operational Since: November 2010 The Challenge the municipality of trysil is home to the largest ski resort in scandanavia. due to ...


    By Biowater Technology

  • Industrial Sao Paulo, Brazil case study

    Project Name: Dairy Location: Sao Paulo, Brazil Type of Plant: Industrial Consultant: Acqua Engenharia Technology Used: CMFF (MBBR) Biomedia Used: BWT35 media Operational Since: August 2010 The Challenge The customer is a producer of dairy products including: Milk, cheese, sour cream, butter and yogurt. In Sao Paulo City as in many large cities, the ...


    By Biowater Technology

  • Wastewater-Primary Treatment

    Primary Treatment is defined as a wastewater treatment process that takes place in a rectangular or circular tank and allows those substances in wastewater that readily settle or float to be separated from the water being treated. This process achieves solids separation. The solids readily available to settle to achieve sedimentation will do so in a settling tank referred as a clarifier. On the ...

  • Case study - rendering retrofit

    Challenge A prominent rendering facility in the southeastern United States was faced with loadings that were too high for the existing dissolved air flotation (DAF) unit. To minimize the amount of carry-over into their secondary system, they were forced to run at a very slow rate. Still, too many solids were being discharged from the existing DAF into the anaerobic pond. The ...


    By Clean Water Technology, Inc.

  • KTC EDIBLES - Case Study

    DAF system to separate oils from their effluent was unsuccessful. Thus, meeting compliance was a challenge. Off-spec oily water was tank-farmed which had become unmanageable. Discharge limit of 1000 mg/l COD was often exceeded by a factor of 4-5 times. The Water Authority was scheduled to terminate discharge if no solution presented. The effluent from five sources was piped to a centralized ...


    By FogBusters, Inc.

  • Case study - paper mill retrofit

    Introduction Clean Water Technology, Inc., the creator of the Gas Energy Mixing (GEM) System, the most advanced primary treatment system on the market. The GEM System provides superior reduction of total suspended solids (TSS), biological and chemical oxygen demand (BOD/COD), fats, oils and grease (FOG) and turbidity. Challenge A prominent paper mill company ...


    By Clean Water Technology, Inc.

  • Nation’s Largest Tank Barge Company case study

    The Problem: The Nation’s largest tank barge company is a centralized treatment facility that receives oily wastewater from barges and ships that transport oil and petroleum products. The wastewater is highly loaded with BOD, COD, TSS and oil and they were seeking a direct discharge permit. The Solution: In 2010, Ecolab partnered ...


    By BioprocessH2O

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