Ultrasonic Algae and Biofilm control

By: Wetland  06-Dec-2011
Keywords: Algae

How does this work ?

The LG Sonic controls algae and reduces the formation of biofilm and some other micro-organisms in lakes, ponds, irrigation reservoirs, pools and all other situations where water is stored. Many of the traditional methods to fight algae are either insufficient, cumbersome, environmentally unfriendly, or all of these.

LG Sonic uses pioneering ultrasound techniques to remove algae efficiently without damaging other forms of life present in the water.

The algae are treated with ultrasonic sound waves issued in precise frequencies, that directly target the cellular structure of the algae. The amount of algae in the water is reduced and controlled in an efficient, cost-effective manner and further growth is inhibited. Green layers disappear, biofilm loosens, and the appearance and clarity of the water is visibly improved. The continuous use of the device prevents the water from becoming polluted again. The LG Sonic method does not use chemicals, needs a low supply of energy, and does not harm water plants, fish, frogs, prawns, zooplankton, and other types of life present in the water.

The LG Sonic solution consists of different models, which are all made to fit it’s own purpose. Although all LG Sonic devices have different strengths and are made for different applications, the technique relies on the same basis.

How to remove algae with ultrasound

The ultrasound waves are produced in our control box (green). Our LG Sonic transducer (black) emits sound waves (red) through the water in a radius of nearly 180°. Algae, within the range of the transducer, will start oscillating at the frequencies of the sound waves. When brought in resonance an algal cell will not be able to sustain some compartments within the cell, these effected compartments can damage or even rupture, causing severe stress to the algal cell. The exact reaction of an algal cell to ultrasound depends, amongst others, on the type of algae. A very common differentiation between algae is between green algae and blue-green algae, also known as cyanobacteria.

Green algae share many characteristics with plant cells. As in plants, green algae posses a vacuole surrounded by a tonoplast, a cell membrane attached to a cell wall and chlorophyll, in charge of photosynthesis. As an effect of ultrasound, the tonoplast of green algae can rupture, releasing the contents of the vacuole to the inner cell. Besides this, the adhesion of the cell membrane and the cell wall can damage.

Blue-green algae are in fact one of the oldest bacteria. These bacteria share some characteristics with a plant cell as well. For example, the capability to produce energy by absorbing light, called photosynthesis. Blue-green algae are capable of travelling through the water vertically due to their possession of gas-vesicles. The ultrasound waves from the LG Sonic rupture these gas vesicles, making the blue-green algae sink to the bottom and possibly die by lack of (sun)light.

Keywords: Algae

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