Basics

Often Abbreviated as PSBR or PSB
May need a "Phot-" bit to diferentiate between non-photobioreactors?
Seems to be the Hydroponics / Aeroponics of PBRs
Uses a porous substrate (often sintered something) to grow a biofilm of algae
Either uses continous flow, or pulsed (like tidal (forget the word) ) hydroponics
Saves water (especially if evaporated water is recovered)
More exposure of algae to circulated gas thus oxygen to co2 concentration can be optimized
Can have more light expose than some other methods
Works especially with Product Excreting Algae <- may need better name

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