Algae bag technology

This is outdoor, clear tarp in sizes of 20 by 30 feet. Two of these made into a bag works as well as any hard plastic bioreactor.  Result: 2,000 gallons of biodiesel per year.
We  need this:

Nutrients are present in several forms in aquatic systems, including dissolved inorganic, dissolved organic, particulate organic, and biotic forms. Only dissolved forms are directly available for algal growth: for nitrogen and phosphorus these include ammonia, nitrate, nitrite, and orthophosphate (as well as dissolved CO2, and dissolved silica, etc.) KRIS 

So, setting up near waste treatment helps. We need to recirculate water, so we need a holding pond or tank.

Filter technology for the hobbyist. Pool filters work here, but simple lower pressure flow filters are just fine and cheaper.

And then we need algae stock, hmmm, this site helps! Oilgae This is the garage market that will transform liquid energy.

From that web site, a multi-stage bioreactor. This one lets the algae gro into proteins, then process the proteins with an enzyme:

But, one of the noted problems with protein usage is the nitrogen content. Liao’s process, which has already been licensed by an unnamed company, takes out the nitrogen from the proteins and recycles it back into an algal growing pond. By altering the commonly used E. coli bacteria, Liao and his team developed an artificial metabolic system that converts the algal proteins. “The metabolic system is like fermentation,” he said. First the algal proteins are harvested then “cooked” for nearly an hour at 80 to 100 degrees Celsius, turning the algal proteins into a hyrdolysate. Then, those proteins are fed to the altered E. coli, which ferments the proteins into alcohols and, at the same time, secretes the ammonia for reuse

The algae industry will support a variety of algae processes producing a variety of portable energy fuels.