Figure 1.

A low-cost, single-use photobioreactor system for commercial production of algal biomass. This ‘hanging bag’ system was developed by the Cawthron Institute, New Zealand for production of microalgae as aquaculture feed and for cultivation of Haematococcus pluvialis – a natural source of the high-value nutraceutical astaxanthin. We have successfully adapted the system for endolysin and vaccine production in C. reinhardtii (L. Stoffels, B. Parker and S. Purton, submitted). The 40 litre bags are optimally illuminated and sterile 5% CO₂/95% air supplied at the base of each bag for phototrophic growth and for mixing. Both batch and continuous operation is possible. ©Supreme Health, New Zealand. Reproduced by permission of Supreme Health, New Zealand. Permission to reuse must be obtained from the rightsholder.