making biodiesel at home com-harvesting biodiesel algae

Harvesting Biodiesel Algae

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harvesting biodiesel algae can be accomplished using micro-screens, or by any number of other methods, such as,

Centrifugation is a process that can be used in harvesting biodiesel algae and involves the use of the centripetal force for the separation of mixtures, used in science labs. In chemistry and biology, increasing the gravitational force, or rate of speed on a test tube so as to more rapidly and completely cause the mixture to separate and to gather on the bottom of the tube. The solution is then either quickly poured or drained from the container without disturbing the separation. The rate of centrifugation is specified by the rate of speed applied to the sample, typically measured in revolutions per minute (RPM) The rate of speed used is determined by the volume of solids present, and the density difference of the liquid, and the viscosity of the oil.. In short, you're in "trial and error" territory here. However, trial and error are inevitable, so don't sweat it.

Flocculation. Froth flotation is another method that can be used in to harvesting biodiesel algae whereby the water and algae are aerated into a froth, with the algae then removed from the water. Alum and ferric chloride are chemical flocculants used to harvest biodiesel algae. Chitosin, a commercial product commonly used for water purification, can also be used as a flocculant. The shells of crustaceans are ground into powder and processed to acquire chitin, a polysaccharide found in the shells, from which Chitosin is derived. The more brackish, or saline the water that the algae is being grown in, the more chemical flocculant will be required to induce flocculation. Harvesting by chemical flocculation is a method that is often too expensive for large operations. Interrupting the carbon dioxide supply to an algal system can cause algae in it to flocculate on its own, which is called autoflocculation.

Ultrasound based methods of algae harvesting are currently under development, and other, additional methods are currently being developed. Ultrasound involves bombarding the algae cell structures until they say "uncle" and float to the top. This area of research shows promise. On a mass scale, it could work. On a small scale, my feeling is it would be cost-prohibitive,