A set of external loop airlift photobioreactors for Chlorella Vulgaris production has been designed and constructed in order to be integrated into a closed-loop plant in which both biodiesel by transesterification and syngas by gasification are produced. In airlift reactors energy consumption for mixing is low, mixing is guaranteed by gas sparging that assures correct mass transfer between the three phases. However, elimination of pumps means more operating difficulty: residence times into the different zones of the reactor must contemporary guarantee good mass transfer, best CO2 distribution and oxygen release and best light/dark cycles if part of the airlift reactor is made of not-transparent material. A method for correctly set-up and tune process variables before the final plant installation is here described.
Set-up of operating conditions in airlift photo-bioreactors for microalgae cultivation in integrated energy production processes
Ombretta Paladino
2018-01-01
Abstract
A set of external loop airlift photobioreactors for Chlorella Vulgaris production has been designed and constructed in order to be integrated into a closed-loop plant in which both biodiesel by transesterification and syngas by gasification are produced. In airlift reactors energy consumption for mixing is low, mixing is guaranteed by gas sparging that assures correct mass transfer between the three phases. However, elimination of pumps means more operating difficulty: residence times into the different zones of the reactor must contemporary guarantee good mass transfer, best CO2 distribution and oxygen release and best light/dark cycles if part of the airlift reactor is made of not-transparent material. A method for correctly set-up and tune process variables before the final plant installation is here described.
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