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Frequently Asked Questions and Answers

Does F&M do the full GWP® installation?

Yes! We take care of everything: design, construction, installation and start-up.
The culture chamber is LDPE – UV treated plastic film, normally used for greenhouses covers, with a transparency to solar radiation > 90%.
The the plastic culture chamber can be disinfected with HClO and acids (HCl) several times, but we suggest n.1 replacement per year especially for outdoor installation.
Biofilm is not a big deal. The best strategy is to schedule a cleaning at the end of each cultivation cycle. Panels of the GWP® reactor can be hydraulically separated by valves, so it is possible to clean or replace each single culture chamber individually.
At F&M we commercialize two different models of GWP®: the GWP®-II and the GWP®-III. For a detailed description of the volumes and size available please see section Photobioreactors of the website.
Yes, The GWP® reactor is specifically designed for both indoor and outdoor installation. All electromechanical components have an IP55 or higher.
There is a scale factor according to the reactor size. Please, consider the range 25 to 7 €/liter scaling-up from the GWP®-II.24 to the GWP®-II.1250. Concerning the GWP®-III, this is specifically designed for research purposes, and cost per liter depends from the level of automation required, but it is close to 450 €/liter.
This depends a lot on project details and is strongly influenced by the site location and algae strains cultivated, but is in the range 250-1000 €/yr according to reactor size.
Yes, as long as measures are taken to avoid contamination.
Thermoregulation (cooling or heating) is out of the GWP® panels, by circulating the culture with a pump through a plate heat exchanger.
GWP® can be provided with different kinds of pumps, according to client’s specifications. A diaphragm membrane pump is installed as standard, ensuring no damages to fragile strains.
These depend on reactor size. For the GWP®-II.250 (9000 L), 87 kWh/day of e.energy. Another important cost is CO2. GWP®s have an up-take efficiency of about 35-50%, this means that 6.6-4 kg CO2/kg dry biomass produced are needed.
The GWP®-III is provided with an automatic tilting system allowing to the user to decide the desired inclination in the range +50°/+140° (respect to the vertical). In the GWP®-II, commonly used for commercial installation, panels are instead installed vertically (90°) and 0.7 m spaced.
The GWP® reactors are suitable for almost all type of strains. GWPs® have been successfully used to cultivate both marine and freshwater algae: Nannochloropsis, Tetraselmis, Phaeodactylum, Arthrospira (spirulina), Porphyridium, Cylindrotheca, Chlorella, Botryococcus and many others.