Improvement of Operational Mode of Counter-Current Dissolved Air Flotation Process

2010 ◽  
Author(s):  
Wang Yuheng ◽  
Wang Qishan ◽  
Zhuo Shengguang ◽  
Li Na
Keyword(s):  
Operational Mode ◽  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Air Flotation ◽  
Counter Current ◽  
Dissolved Air

Enhanced rapid gravity filtration and dissolved air flotation for pre-treatment of river thames reservoir water

1998 ◽  
Vol 37 (2) ◽  
pp. 35-42 ◽  
Author(s):  
M. J. Bauer ◽  
R. Bayley ◽  
M. J. Chipps ◽  
A. Eades ◽  
R. J. Scriven ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
21St Century ◽  
Reservoir Water ◽  
Dissolved Air Flotation ◽  
Lowland Rivers ◽  
Air Flotation ◽  
Pre Treatment ◽  
Counter Current ◽  
Dissolved Air

Thames Water treats approximately 2800Ml/d of water originating mainly from the lowland rivers Thames and Lee for supply to over 7.3million customers, principally in the cities of London and Oxford. This paper reviews aspects of Thames Water's research, design and operating experiences of treating algal rich reservoir stored lowland water. Areas covered include experiences of optimising reservoir management, uprating and upgrading of rapid gravity filtration (RGF), standard co-current dissolved air flotation (DAF) and counter-current dissolved air flotation/filtration (COCO-DAFF®) to counter operational problems caused by seasonal blooms of filter blocking algae such as Melosira spp., Aphanizomenon spp. and Anabaena spp. A major programme of uprating and modernisation (inclusion of Advanced Water Treatment: GAC and ozone) of the major works is in progress which, together with the Thames Tunnel Ring Main, will meet London's water supply needs into the 21st Century.

scholarly journals Application of dissolved air flotation process for industrial sludge thickening: A laboratory-scale study

2017 ◽  
Vol 4 (1) ◽  
pp. 22 ◽  
Author(s):  
MohammadBagher Miranzadeh ◽  
Ali Atamaleki ◽  
Gholamreza Mostafaii ◽  
Hossein Akbari ◽  
Leila Iranshahi ◽  
...  
Keyword(s):  
Laboratory Scale ◽  
Industrial Sludge ◽  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Air Flotation ◽  
Sludge Thickening ◽  
Dissolved Air

Dissolved air flotation in Southern Africa

1995 ◽  
Vol 31 (3-4) ◽  
pp. 159-172 ◽  
Author(s):  
G. Offringa
Keyword(s):  
Southern Africa ◽  
Historical Development ◽  
Industrial Effluents ◽  
Water Reclamation ◽  
Current Application ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
Sludge Thickening ◽  
Counter Current ◽  
Dissolved Air

A brief review is given of the historical development and current application of flotation technology in Southern Africa. Applications in water reclamation, sludge thickening, industrial effluents and water treatment are presented on the basis of some case studies and pilot investigations. Design philosophies followed are pointed out. Research and development performed and a few innovations by local engineers and scientists are highlighted. These include combination or integration of dissolved air flotation (DAF) with filtration, presettling and powdered activated carbon, a simple aeration nozzle, surface grids for float dewatering and stabilization, and a counter-current DAF.

Decontamination Features and Mechanism Research of Copolymerization Dissolved Air Flotation Process

2016 ◽  
Vol 13 (4) ◽  
pp. S111-S118
Author(s):  
Yonglei Wang ◽  
Baozhen Liu ◽  
Kefeng Zhang ◽  
Hongbo Wang ◽  
Mei Li ◽  
...  
Keyword(s):  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Mechanism Research ◽  
Air Flotation ◽  
Dissolved Air

Decontamination Features and Mechanism Research of Copolymerization Dissolved Air Flotation Process

2016 ◽  
Vol 13 (S2) ◽  
pp. S111-S118 ◽  
Author(s):  
Yonglei Wang ◽  
Baozhen Liu ◽  
Kefeng Zhang ◽  
Hongbo Wang ◽  
Mei Li ◽  
...  
Keyword(s):  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Mechanism Research ◽  
Air Flotation ◽  
Dissolved Air

Dissolved air flotation in potable water treatment: the Dutch experience

1995 ◽  
Vol 31 (3-4) ◽  
pp. 149-157 ◽  
Author(s):  
Jan van Puffelen ◽  
Paul J. Buijs ◽  
Peter N. A. M. Nuhn ◽  
Wim A. M. Hijnen
Keyword(s):  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Direct Filtration ◽  
Advantages And Disadvantages ◽  
Air Flotation ◽  
Water Companies ◽  
Micro Organisms ◽  
Chlorophyll A Content ◽  
Dutch Experience ◽  
Dissolved Air

This paper reviews the experience the drinking water companies in The Netherlands have gained in the last twenty years in the field of dissolved air flotation. An overview of the Dutch flotation plants with their individual objectives is presented. The efficiency of flotation towards the removal of different parameters, such as turbidity, organic matter and micro-organisms is good, which is illustrated by data from the water companies. Both in the past and at present water companies compare flotation to other floc separation techniques, such as sedimentation or direct filtration. Specially for waters with (relative) low turbidity and high chlorophyll-a content, flotation proved (in combination with rapid sand filtration) to be very effective. The efficiency of the flotation process has been improved by the development of different nozzle-types. Some of these types are described here, each with their advantages and disadvantages. In general dissolved air flotation has proved to be as sturdy and reliable as sedimentation techniques, such as lamellae settling.

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