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Nanobubble applications in Dissolved Air Flotation

Dissolved Air

Flotation (DAF)

Lakes & Pond


Wastewater Treatment

Dissolved Air Flotation (DAF)

Flotation is a century-old water treatment process in which gas is introduced to a pressurized liquid, generating a buoyant force and resulting in flotation of suspended matter such as fats, oils, greases and suspended solids. Little technical advancement has been made to the way in which gas is introduced to the liquid, and many facilities still use technology that is decades old. Nanobubble Systems advanced gas-to-liquid nanobubble injection technology delivers a high volume of nanobubbles that greatly improves the flotation process. An exponential increase in surface area coupled with the strong negative charge of the nanobubbles brings new benefits to the flotation process that traditional aeration methods simply cannot achieve. These unique properties enable flotation technologies to be more efficient, typically consuming only 10%-to-20% of the energy consumption of conventional methods, and help ensure compliance with environmental regulations.

Horticulture & Hydroponics


Cleaning Processes

Better Collision

The negative surface charge of nanobubbles limits bubble coalescence, ensuring they stay separated in solution. The bubbles charge, in combination with the high concentration of nanobubbles delivered to the wastewater by the Nanobubble generator, increases the probability of collision with suspended matter and improves floatation rates.

Oil & Gas

Rise Rate Flexibility

The gas-injection rate through the nanobubble generator is adjustable, enabling operators to manipulate the size of bubbles produced and adjust rise rates accordingly to meet the needs of the water being treated. As bubble size decreases so does its buoyancy and subsequently its rise rate. A lower rise rate is advantageous for froth flotation of coarse particles and hard-to-float suspensions that require relatively long slide times. Meanwhile, a more rapid rise rate may be acceptable for larger, more buoyant particle removal.

Improved Chemical Efficiency

The flotation process is often heavily dependent on coagulant and flocculants to maximize particle collision rates and produce floc. Nanobubble systems Generator improves this process by generating over one billion nanobubbles per millimetre. The sheer concentration of nanobubbles, coupled with their strong surface charge, increases collision rates and enhances the formation of floc. The net effect is a reduction in the quantity of chemicals needs to achieve flotation.

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