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introduction to airlift pump
introduction to airlift pump
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air lift water pump PT2 (theory and fabrication)
air lift water pump PT2 (theory and fabrication)
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Buoyancy Hydro - Amazing Airlift pump tests.mov
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AquaZen Airlift Pump
AquaZen Airlift Pump
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Aquaponics Airlift Pump
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Airlift Pump Systems for Aquaponics, Aquaculture and Home
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AquaLab: Ex 06 airlift principles lesson
AquaLab: Ex 06 airlift principles lesson
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Olomana Gardens Educational Air Lift Pump Display
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How-To Make A Simple Air Lift Pump
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Nano Airlift Pump Challenge!  BEAT THIS to be Champion!  And World record holder!
Nano Airlift Pump Challenge! BEAT THIS to be Champion! And World record holder!
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How To Hydroponics - S02E21 Air Lift & Pulser Pumps
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airlift test
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How to make my high lift/submergence ratio airlift pump.  Lets rewrite the textbooks!
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Brumbert Airlift Water Pump
Brumbert Airlift Water Pump
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Air Lift Pump (Laboratory model)
Air Lift Pump (Laboratory model)
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Clear aquarium aquaponics, moving water with air lift pump
Clear aquarium aquaponics, moving water with air lift pump
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How To Make Your Own Air Lift Pump - Aquaponic GreenHouse  With Fish
How To Make Your Own Air Lift Pump - Aquaponic GreenHouse With Fish
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airlift pump / geyser pump hybrid
airlift pump / geyser pump hybrid
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Aqua-zen airlift pump for aqua-ponic system, (one-day) at Amara
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Air lift water pump - how it works
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How To Make A AirLift Water Pump
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Demonstration of the Pipe in a Pipe Air Lift Pump in Action
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Air lift Pump - lung test.mp4
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AirLift pump system for WindowFarms
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Aquaponics: Paradigm Shift with Airlift
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airlift geyser pump
airlift geyser pump
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Airlift pond example 1
Airlift pond example 1
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air lift pumping water well
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Solar power: Airlift pump fountains.  Not as hard to make as you might think!
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44
window farm airlift pump
window farm airlift pump
::2010/03/24::
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45
AquaLab: Ex 06 Airlift pump experiment demo
AquaLab: Ex 06 Airlift pump experiment demo
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46
Air-Lift Water Pump for an Aquaponic System explained, A How to Video on DIY Crafts Recycling Ideas
Air-Lift Water Pump for an Aquaponic System explained, A How to Video on DIY Crafts Recycling Ideas
::2011/06/29::
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47
Indoor aquaponics with air lift pump
Indoor aquaponics with air lift pump
::2014/01/01::
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48
Airlift pump in a bucket!  5 month old technology, Already in use in Denmark, Canada France, USA
Airlift pump in a bucket! 5 month old technology, Already in use in Denmark, Canada France, USA
::2013/04/07::
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49
Tromp and airlift pump, time for their return?
Tromp and airlift pump, time for their return?
::2010/01/19::
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Window Farming - Air Lift Pump Test
Window Farming - Air Lift Pump Test
::2010/07/21::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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Diagram of an airlift pump
An airlift pump, powered by compressed air, raises fluid by entraining gas to reduce its density. 1. Air supply. 2. Liquid supply. 3. Air inlet port. 4. Air supply line. 5. Air port. 6. Air outlet. 7. Fluid intake. 8. Riser tube. 9. Air liquid mixture. 10. Pump outlet. L:Liquid, usually wastewater. LL:Liquid level. V:Vessel G:Gravel or solids.

An Airlift pump is a pump that has low suction and moderate discharge of liquid and entrained solids. The pump injects compressed air at the bottom of the discharge pipe which is immersed in the liquid. The compressed air mixes with the liquid causing the air-water mixture to be less dense than the rest of the liquid around it and therefore is displaced upwards through the discharge pipe by the surrounding liquid of higher density. Solids may be entrained in the flow and if small enough to fit through the pipe, will be discharged with the rest of the flow at a shallower depth or above the surface. Airlift pumps are widely used in Aquaculture to pump, circulate and aerate water in closed, recirculating systems and ponds.[1] Other applications include dredging, underwater archaeology, salvage operations and collection of scientific specimens.

Principle[edit]

The only energy required is provided by compressed air.[citation needed] This air is usually compressed by a compressor or a blower. The air is injected in the lower part of a pipe that transports a liquid. By buoyancy the air, which has a lower density than the liquid, rises quickly. By fluid pressure, the liquid is taken in the ascendant air flow and moves in the same direction as the air. The calculation of the volume flow of the liquid is possible thanks to the physics of two-phase flow.


Utilization[edit]

Airlift pumps are often used in deep dirty wells where sand would quickly abrade mechanical parts. (The compressor is on the surface and no mechanical parts are needed in the well). However airlift wells must be much deeper than the water table to allow for submergence. Air is generally pumped at least as deep under the water as the water is to be lifted. (If the water table is 50 ft below, the air should be pumped 100 feet deep).

It is also sometimes used in part of the process on a wastewater treatment plant if a small head is required (typically around 1 foot head).


Airlifts are used to collect fauna samples from sediment.[2] Airlifts can oversample zooplankton and meiofauna but undersample animals that exhibit an escape response.[2]

Inventor[edit]

The first airlift pump is considered to be invented by the German engineer Carl Emanuel Löscher (de), who lived in the second part of the eighteenth century. He discovered the airlift pump in 1797.

Advantages and disadvantages[edit]

The following paragraph exposes the advantages and disadvantages of the airlift pump compared to other pumping techniques.

Advantages[edit]

  • The pump is very reliable. The very simple principle is a clear advantage. Only air with a higher pressure than the liquid is required.
  • The liquid is not in contact with any mechanical elements. Therefore, neither the pump can be abraded (which is important for sandwater wells), neither the contents in the pipe can be abraded (which is important for archeological research in the sea)
  • Act as a water aerator and can in some configurations lift stagnant bottom water to the surface (of water tanks).
  • Since there are no restrictive pump parts, solids up to 70% of the pipe diameter can be reliably pumped.

Disadvantages[edit]

  • cost: while in some specific case the operational cost can be interesting, most of the time, the quantity of air to compress is high compared to the liquid flow required.[3] · [4] · .
  • Conventional airlift pumps have a flow rate that is very limited. The pump is either on or off. It is very difficult to get a wide range of proportional flow control by varying the volume of compressed air. This is a dramatic disadvantage in some parts of a small wastewater treatment plant, such as the aerator.[5]
  • The suction is limited.
  • This pumping system is suitable only if the head is relatively low. If you want to obtain a high head, you have to choose a conventional pumping system.
  • Because of the principle, a lot of air remains in the liquid. In certain case, this can be problematic, as, for example, in a waste water treatment plant, before an anaerobic basin.

Design improvements[edit]

Diagram of a geyser pump
A geyser pump, an improved airlift pump, powered by compressed air, raises fluid by forcing rising bubbles to displace fluid. 50. Air supply. 52. Air inlet port. 58. Liquid supply. 60,62. air supply lines. 64. upper end of air tank 86. 66,82. Air ports. 70. Upper air inlet of u-shaped elbow 74. 76 Air outlet. 84. Fluid intake. 65. Riser tube. 88. Displaced liquid. 90. Pump outlet. L:Liquid, usually wastewater. LL:Liquid level. VVV:Vessel G:Gravel or solids

A recent (2007) variant called the "geyser pump" can pump with greater suction and less air. It also pumps proportionally to the air flow, permitting use in processes that require varying controlled flows. It arranges to store up the air, and release it in large bubbles that seal to the lift pipe, raising slugs of fluid.[6]

See also[edit]

Notes and references[edit]

  1. ^ http://www.airlift.eu/
  2. ^ a b Cahoon, LB; Lindquist, DG; Clavijo, IE; Tronzo, CR (1992). "Sampling small invertebrates at the sediment-water interface". In: Cahoon, LB. (ed.) Proceedings of the American Academy of Underwater Sciences Twelfth Annual Scientific Diving Symposium "Diving for Science 1992". Held September 24–27, 1992 at the University of North Carolina at Wilmington, Wilmington, NC. American Academy of Underwater Sciences. Retrieved 2013-04-05. 
  3. ^ air quantity calculation PDF (1.86 MB)
  4. ^ airlift basic calculation - dead link, 15 April 2013 Template:Xls
  5. ^ New Pump Technology May Improve Small Flows, WVU NCSFC Clearinghouse Accessed 2011-3-21
  6. ^ Patent Application number: 11/654,448, January 17, 2007, Inventor: Masao Kondo
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