The objectives of this research are to develop a prototype system for the capturing carbon
dioxide from the biogas production system by algae cultivation and testing the efficiency of carbon
dioxide capturing by algae.
The experimental process consists of the design a photobioreactor for algea cultivation, a
sulfur dioxide removal system, algae tank with biogas storage system, circulation system with
adjustable flow rate inverter and artificial lighting system for algae cultivation. While, the
experimental performances comprise the efficiency of carbon dioxide capturing, the efficiency of
methane gas improving and algae growth rate under various conditions.
The experimental results show that the flow rate of algae in photobioreactor system could
adjust between 20-34 L/min that this volume of flow rate is flow via a ventury while the flow rate
of biogas also feed in the same way between 6-14 L/min and the amount of algea cells is not
damaged and lost. The artificial lighting system can provide light intensity at levels 40 -240 umol
m-2s-1. Fanally, throughout the experiment, it was found that the best of both of the efficiency in the
capturing of carbon dioxide and the efficiency of improving methane is the cultivation of algae
under red + blue light condition and followed by red light and the blue light in the last.