Effects of the light intensity and the reactor geometry on the microalgae yield in a bubble-column photobioreactor

Yuswan Muharam, Dianursanti, Aditya Bintang Pramadana, Syailendra Supit

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Microalgae cultivation is a light-demanding process. Optimal growth of microalgae takes place in appropriate reactors. In this research the effects of the light intensity and the reactor geometry on the yield of microalgae Nannochloropsis salina in an internally-illuminated bubble-column photobioreactor was investigated. An axisymmetric two-dimensional phenomenological model of the reactor comprising gas-phase and liquid-phase mass balances was utilized. Axial and radial dispersion correlations in gas and liquid phases were applied on the description of the non-ideal flows in the reactor. The model was validated against the experimental data obtained in a reactor with 0.1 m in the diameter of the smaller cylinder, 0.197 m in the diameter of the larger cylinder, 0.8 m in the culture height, and being fed by a gas of 2% CO2-air ratio with the flow rate being 800 mL/min for 15 days. The validation result shows that the model can reproduce well the experimental results with 5% error. The microalgae yield produced in the reactor with the diameter of the larger cylinder of 0.197 m is 0.52 g/L. It decreases when the diameter of the larger cylinder enlarges. Increasing the intensity up to 22.5 W/m2 raises the microalgae production. However, increasing the intensity beyond that value reduces the microalgae production.

Original languageEnglish
Title of host publication4th International Tropical Renewable Energy Conference, i-TREC 2019
EditorsEny Kusrini, I. Gde Dharma Nugraha
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420144
DOIs
Publication statusPublished - 3 Sep 2020
Event4th International Tropical Renewable Energy Conference 2019, i-TREC 2019 - Bali, Indonesia
Duration: 14 Aug 201916 Aug 2019

Publication series

NameAIP Conference Proceedings
Volume2255
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Tropical Renewable Energy Conference 2019, i-TREC 2019
Country/TerritoryIndonesia
CityBali
Period14/08/1916/08/19

Fingerprint

Dive into the research topics of 'Effects of the light intensity and the reactor geometry on the microalgae yield in a bubble-column photobioreactor'. Together they form a unique fingerprint.

Cite this