high-rate dissolved air flotation unit Articles

  • Treatment of Spent Filter Backwash Wastewater Using Dissolved Air Flotation Process

    Spent Filter Backwash Water (SWW) is a major recycle stream that accounts for 10% (about 30 mgd) of the average flow at Blue Plains Advanced Wastewater Treatment Plant (AWTP) and a similar proportion of nitrification and denitrification treatment process capacity (DCWASA Focus, November 2004). The peak SWW flow and load result from increased filter washing during high flow events. The combined ...

  • The design and operation of conventional and novel flotation systems on a number of impounded water types

    This paper describes the design of conventional Dissolved Air Flotation (DAF) systems, and the novel Counter Current Dissolved Air Flotation Filtration (COCODAFF®) process. The operation and performance of these plants on a variety of water types in the United Kingdom and South Africa is also described. The advantages of flotation processes for the treatment of impounded waters either high in ...


    By IWA Publishing

  • Case study – GEM vs DAF, efficiencies of GEM system over dissolved air floatation (DAF)

    Introduction Clean Water Technology, Inc., the creator of the Gas Energy System (GEM), provides 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 Frozen Food Manufacturer ...


    By Clean Water Technology, Inc.

  • Treatment Of High Strength Chemical Industry Wastewater Using Moving Bed Biofilm Reactor (MBBR) and Powdered Activated Carbon (PAC) Technology

    A new Waste Recycling Facility (WRF) was created at the Sasol coal to liquids facility in Secunda, South Africa with a wastewater treatment system that includes equipment to treat the wastewater and storm water through several steps including equalization, oil removal (gravity separation and dissolved air flotation), lime neutralization/metals precipitation, back-neutralization, fixed-film ...

  • Respirometry study about the olive oil effects in the activated sludge process case study

    The problem of Oils in the Activated Sludge Process In many activated sludge plants excessive oils discharges can give rise to Nocardia foaming which causes major operational problems. While the bulk of the oils are removed in Dissolved Air Flotation (DAF) units or grease interceptors the remainder must be treated in the wastewater treatment system. But however, in case of high ...


    By SURCIS, S.L.

  • Case study – Gem-D series

    Introduction Clean Water Technology, Inc., the creator of the Gas Energy Mixing (GEM) System, introduces their newest in technology The GEM - D Series for municipal water and wastewater applications. The GEM-D Series is a hybrid dissolved air – flotation system. What makes the GEM-D Series better than the rest? Introduction of air through Liquid Solid Gas ...


    By Clean Water Technology, Inc.

  • Adapter bacteria control oil spill in bulk

    Introduction Microbac was called in to advise on a required treatment for an integrated bulk oil handling facility and sea-land terminal, receiving, storing and shipping a wide variety of liquid fuels, inorganic chemicals and petrochemicals, many of which are toxic to microorganisms. The variable and complex waste streams from tank truck cleaning, ballast and tank cleaning discharges from ...


    By Microbac Ltd

  • 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.

  • Quietly Saving 425 HP on Five DAFS

    Great Lakes Pulp & Fibre, Menominee, Michigan, USA invited World Water Works to demonstrate the ability to reduce operational costs associated with two Poseidon dissolved air flotation systems (DAFs). The mill stipulated that the performance of the DAFs must not be negatively affected by any operational cost reductions. The inefficiency of the existing air dissolving technology presented the area ...


    By World Water Works, Inc.

  • 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 – military

    Introduction In 2009, a West Coast Military Air Base contacted CWT to bid on a plane washing wastewater treatment facility. The military needed to upgrade and replace their antiquated dissolved air flotation (DAF) unit to meet more stringent discharge requirements and attain higher contaminant reductions. Being a Federal Base, it was imperative for the military to have the best wastewater ...


    By Clean Water Technology, Inc.

  • HS-200 Stands the test of heavy manufacturing

    A manufacturer of aircraft component generates a free and emulsified oily wastewater, which results from their machining, milling, cutting, and other operations. Presently, they are using skimmers and dissolved air flotation to remove oil from the water. To remove their heavy metals they follow up with flocculation, precipitation and clarification. Due to the rapidly ...


    By Hydrosil International

  • Waste Management Solutions for Business

    How to win the race for everyone Waste Management Solutions for Business Industry will always lead the way in the adaptation of new technology, and especially the technology of conservation. This is not necessarily for any ideological reason, but because the people who manage water use better understand the economic incentives for adopting new ...

  • Rendering Plant

    Animal Rendering Plant Wastewater Treatment Wastewater Recycling This facility renders animals as a means to recover protein. The facility generates wastewater flow of 75,000 gal/day with high levels of BOD (10,000 ppm), TSS ...


    By Integrated Engineers Inc.

  • Rendering Facility Wastewater Treatment

    Food Processing Wastewater Treatment Case Studies Animal & Grease Rendering Plant Wastewater Treatment Net savings of $21,400/month or $256,800 Annually ...


    By Integrated Engineers Inc.

  • Case study – bio-diesel application

    More than a decade of research and development by a network of soybean farmers, backed by an environmentally responsible food processor, a local soybean association and the formation of a farmer (majority) owned firm, resulted in the construction of a biodiesel facility in the central United States. Using soybean oil as its primary feedstock, the facility planned to produce 40 million gallons of ...


    By Clean Water Technology, Inc.

  • WPL supplies Farne Salmon and Trout with a substantial new effluent treatment plant case study

    A new effluent treatment plant designed by WPL is ensuring that Farne Salmon and Trout Ltd in Berwickshire - one of Europe's largest smoked salmon facilities - complies with tighter local trade effluent discharge regulations, whilst significantly reducing its sewer discharge costs. WPL worked with Farne and Scottish Water from an early stage to design ...


    By WPL Ltd

  • WPL supplies Farne Salmon and Trout with a substantial new effluent treatment plant

    A new effluent treatment plant designed by WPL is ensuring that Farne Salmon and Trout Ltd in Berwickshire - one of Europe's largest smoked salmon facilities - complies with tighter local trade effluent discharge regulations, whilst significantly reducing its sewer discharge costs. WPL worked with Farne and Scottish Water from an early stage to design and supply a substantial, energy efficient ...


    By WPL Ltd

  • Case study – frozen food applications

    Introduction Clean Water Technology Inc. (CWT), the creator of the Gas Energy Mixing (GEM) System, offers 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 and at the same time provides complete expandability in terms ...


    By Clean Water Technology, Inc.

  • Electrocoagulation Wastewater Treatment: Specialized Technology to meet the needs of food & beverage wastewater

    The effects of water scarcity and stricter environmental regulations placed on water usage are increasing the cost of using freshwater globally. The consequences of these increasing costs on food and beverage companies are twofold, since the companies are charged for both the water that they utilize in their processes and on their wastewater discharge. Additionally, the food and beverage industry ...

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