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Showing 1 to 17 of 17 for “"Dissolved air flotation"”.
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Treatment of Produced Water Using Dissolved Air Flotation (DAF) Technique and Ionic Liquids
… the environment. In the present research, dissolved air flotation technique (DAF) was used to study the optimum removal efficiency of oil, chemical oxygen demand, turbidity and total organic carbon using different coagulants. Five types of coagulants were used in the experiments. A widely …
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The evaluation of polymeric organic coagulants for potable water treatment by dissolved air flotation
Submitted in fulfilment of the academic requirements for the Degree of Master of Engineering: Chemical Engineering, M. L. Sultan Technikon, Durban, South Africa, 2001.
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The use of a microbubble dispersion to enhance a dissolved air flotation system in a wastewater treatment sludge media
… a 55 to 70% dispersion of 50 +/- 40 micron-sized air bubbles in water. Generation of CGAs has proceeded to allow continuous production of up to 80 liters per minute. Previous laboratory testing has demonstrated the effectiveness of CGA flotation for removing fine particulates, such as coal fines, …
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Application of Ozone in Dissolved Air Flotation (DAF) for Enhanced Removal of TOC and Suspended Solids in Pulp and Paper Wastewaters
… for safe release from the mill is essential. Dissolved air flotation (DAF) has many applications and involves the formation of air microbubbles triggered by a drop to atmospheric pressure. When introduced into the wastewater, these microbubbles attach to the floc particles present and float to …
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A study of the removal of metal ions from aqueous solution by adsorptive bubble separation methods
… ions from aquous solutions and effluents by dissolved-air flotation. The process involves the precipitation of the metal hydroxide species as floc particles and their subsequent flotation by small gas bUbbles' which are produced by the release, under shear, of pressurized air-saturated water …
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The Sustainability of Biofuels Produced from Microalgae
… plus belt filtration, were compared to a modeled dissolved air flotation technology and a fossil fuel source. For a functional unit of one MJ of renewable diesel (RD), membrane filtration had the lowest GHG emissions at 40.8 g CO₂(eq)/MJ RD. Dissolved air flotation was the highest scenario at 51.9 …
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Full-scale operation of a tubular ultrafiltration system in the treatment of oily waste
… studied were as follows: chemical addition dissolved air flotation (CA-DAF), biological aerated filter, tubular and rotary ultrafiltration (UF), land application, and constructed wetlands. The primary pollutant of concern was oil/grease (O/G). Separation of the free oil in a single three …
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Metal ion removal by adsorptive bubble separation methods
… removal of mercury(II) from solution, using a dissolved-air flotation technique. Initially, removal of mercury(II) was achieved from aqueous solution using a laboratory-scale apparatus and optimum removal using various coagulating agents was investigated. The mercury(II) concentration was …
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A study of adsorptive bubble separation methods for removal of metal ions from aqueous solution
… (II) ions from aqueous solution by dispersed-air flotation, dissolved-air flotation and liquid-liquid extraction techniques. Precipitation of the copper (II) species has been achieved by complexing with a long-chain a-dioxime, 5,6-decandionedioxime, which was synthesised and characterised by …
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Effect of Addition of High Strength Food Wastes on Anaerobic Digestion of Sewage Sludge
… waste, cheese processing waste (whey), dissolved air flotation waste (DAF) from a food processor, and grease trap waste (GTW), in addition to the municipal sludge. The impact of these high strength wastes (HSWs) on digester performance was analyzed for a total period of 150 days. Among …
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An experimental study on the effect of viscosity on micro-bubble size distribution and rise velocity in a bubble column
Dissolved air flotation (DAF) is a proven solid-liquid separation technology that is being used in water and wastewater treatment as an alternative process to conventional sedimentation operation. Due to its smaller footprint and ability to cater for higher liquid loading rates, it is ideal in many …
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Produced Water Treament Using DAF With a Mixture of Ionic Liquids and Organoclay as Pre-treatment Chemicals
… the optimum oil removal efficiency using dissolved air flotation system under specified experimental conditions using a 3*3 Taguchi method of experimental design. An ionic liquid (1-ethyl-3-methyl-Imidazolium actetate) (EMIMAc) and an organoclay(OC) (JC 9450) were used as coagulant …
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Anaerobic Co-digestion of Wastewater Treatment Pond Algae with Wastewater Sludge
… algae that were harvested by coagulation and dissolved air flotation. The research was meant to assist in the planning for full-scale algae digestion at a large pond facility in California. The independent variables evaluated were algae/sludge ratio in the digester feed (100% to 0%), organic …
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Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
… UV detection methods. Raw water (ponds) had high dissolved organic matter, however this was greatly reduced after the dissolved air flotation, biological and granular activated carbon treatment processes. Dissolved organic carbon (DOC) removal efficiencies of up to 98% were achieved in some cases, …
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Fate and Effect of Peracetic Acid Solutions on Biological Wastewater Treatment Systems
… On-site monitoring did not detect PAA in dissolved air flotation (DAF) influent and effluent samples collected at mid plant operation shifts; however, up to 25 mg/L PAA was detected in the DAF effluent at the end of the operation shift coinciding with emptying chiller tanks where PAA …
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Applications of aerobic and anaerobic bacteria in the fields of biological degradation of contaminants and biological wastewater treatment
… an industrial Wastewater Treatment Plant for a Dairy-Site in Edendale, Southland, New Zealand. This Plant consists of a DAF-Unit (Dissolved Air Flotation), two Extended Aeration Lagoons with Activated Sludge and two Clarifiers, one for the Activated Sludge and the second for the dosing of …
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Water saving and reuse strategies for a local South African fresh-produce bulk market
Submitted in fulfilment of the requirements for the degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2026