Algae Biodiesel Fuel

The Best Way to Pick a Algae Photo Bioreactor

Renewable Energy entrepreneurs are now searching to find the best bio-reactors with the right stuff. What is the right stuff you say? Well it should be a algae PBR that meets numerous challenges: be inexpensive, scalable, able to handle variable climates at different client sites.

Inexpensive to Execute

The initial area of concern is definitely the cost. As with all devices of a industrial size, cost is very important. The technological innovation at this time has many faces to include row crops, large open pond systems, raceway pond systems and algae PBR’s. The system you choose should have nutrients to nourish the algae, water and sunshine. Your carbon dioxide inputs can be active or ambient air flow. Cross contamination of the algal mass is a issue, but the planned use of the algae will be the best guide.

Constant Harvesting

Harvesting the algal mass will always be a concern depending on the system. It will take more effort to harvest algae from an open pond process than it would from a continuous harvesting photo-bioreactors. Continuous harvesters do just that, always harvest algae cake, at this point you will only need personnel to move the algal biomass to the next stations for drying and oil extraction.

Oil Extraction

•    There are three well-known methods to extract the oil from oilseeds, and these methods apply equally well for algae too:

1. Expeller/Press

2. Hexane chemical oil removal

3. Supercritical Fluid extraction

•    Expeller/Press

•    Expression/Expeller press-When algal mass is dried it keeps its oil content, which then can be “forced” out with an oil press. Many industrial manufacturers of vegetable oil use a combination of mechanical pressing and chemical solvents in extracting oil.

•    While more efficient procedures are appearing, an easy process is to use a press to remove a large percentage (70-75%) of the oils out of algae.

•    hexane Solvent Technique

•    Algae oil can be removed utilizing chemical substances. Benzene and ether have been used, but a popular chemical for solvent extraction is hexane, which is relatively inexpensive.

•    Supercritical Fluid Method

•    Supercritical removal involves, pressure and heat to burst algal cell membranes.

Regardless of what algae method you chose just make sure it meets your requirements and manufacturing goals.

Algae Biofuel will play a very important part in meeting the worlds increasing energy need, Algae has a place in not just our past, but also in our future as well.


Leave a Reply