Oilgae - Glossary

Refers to the act or process of gathering the algae that has been cultivated and grown. Because of the nature of algae and the diverse habitats that it grows in, algae harvesting might need some special techniques to be employed in specific cases.

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A highly efficient froth flotation procedure has been developed for harvesting algae from dilute suspensions. The method does not depend upon the addition of flotants. Harvesting is carried out in a long column containing the feed solution which is aerated from below. A stable column of foam is produced and harvested from a side arm near the top of the column. - Source

Algae in excess - harvesting for life - There is one basic criterion that the algae harvester must meet: it must be able to harvest floating algae in water deeper than 30 cm without disturbing the bottom or plant and animal life to any considerable extent. The prototype that has been built has three main components: a hydraulic engine that drives the other two components; a platform; and three transport belts that pull up, de-water and bufferstore the algae.

Harvesting of Algae by Froth Flotation - Harvesting procedures. The first approach was an attempt to harvest the algal cells by catching the droplets formed by the bursting of bubbles rising to the surface of aerating cultures. For this purpose, a trough-collar was fitted around the upper rim of a cylindrical culture vessel. Air was introduced into the bottom of the vessel.2 the rising bubbles burst at the liquid surface and the fragments which were ejected from the culture were collected in the trough. This process was quite inefficient in that large volumes of air were required for small harvests.