Fig. 1
From: Comparison of Galdieria growth and photosynthetic activity in different culture systems
a Twin-layer system (Twin Layer-S): alg immobilized microalgae, pcm polycarbonate membrane as a carrier for microalgae, gf glass fiber material, air membrane pump for air supply, cm culture medium (figure reproduced and modified from Carbone et al. 2017a, b); b Decanter (Decanter-LF); c A side view of Ultraflate photobioreactor (UP-B) (Gifuni et al. 2018d Tubular bioreactor (Tubular-B); e Inclined bubble column (Inclined Bubble-C) (Olivieri et al. 2012)