Abstract
Hydrocarbon productivity and recovery from Botryococcus braunii were investigated when grown under LED irradiation at photosynthetic photon flux density (PPFD) of 120 μmol m^<-2> s^<-1>with or without violet light. Results show that the algal production amount and hydrocarbon composition were approximately equal in both conditions, and that the hydrocarbon content was greater in conditions without violet light. Furthermore, results clarified that hydrocarbons can be extracted effectively at low temperatures using thermal pretreatment when Botryococcus braunii are cultured without violet light. These results suggest that LED irradiation without violet light is more effective for Botryococcus braunii hydrocarbon productivity and recovery.
