DESIGN OF FLAT-PANEL AIRLIFT PHOTOBIOREACTOR AND HIGH BIODIESEL PRODUCTION FROM MICROALGAE WITH LED AT VARIOUS WAVELENGTHS


Thesis Type: Postgraduate

Institution Of The Thesis: Van Yüzüncü Yil University, Mühendislik Fakültesi, Çevre Mühendisliği Bölümü, Turkey

Approval Date: 2020

Thesis Language: Turkish

Student: Murat Onur Çeliktaş

Supervisor: Melih Onay

Abstract:

Growth of microalgae, the third generation biofuel resource, in reactor systems has been recently studying intensively. In this study, firstly, 1L flat-panel airlift photobioreactor was designed to increase growth of microalgae and to obtain high amount of biomass for controlled production in the industry. Gloeocystis vesiculosa 901 was grown at the flat-panel airlift photobioreactor in Bold Basal Medium (BBM) at the various wavelengths (white, purple, blue, green, yellow, orange and red). The highest biomass values were 0.62 and 0.59 g/L at the red and the white, respectively. In addition, the red had the highest lipid concentration with 0.14 g/L among lipid samples extracted from microalgae. The maximum lipid percentage was 23.13 % at the blue light. The red light sample with the maximum lipid productivity was transesterified with 0.1 N of KOH and biodiesel productivity was found as 87 %. Also, the maximum nitrogen removal percentage values were 81.6 % and 80.5 % at the red and the white, respectively. In conclusion, the maximum biomass, lipid and biodiesel productivity can be achieved when Gloeocystis vesiculosa 901 is grown in the flat-panel airlift photobioreactor at the red wavelength (630-750 nm). This study at the lab scale can be developed via designs of large scale photobioreactors at the next studies for the goal of the production.