Ali Ibrahim Mze, Soumayat and Azmi, Azlin Suhaida and Mohamad Puad, Noor Illi and Ahmad, Farah and B A Rahman, Hasrizal and ABD WAHAB, NURUL FARAHIN (2025) Optimization of cultivation parameters for CO2 sequestration and protein production in Chlorella vulgaris using Taguchi methodology. Chemical And Natural Resources Engineering Journal, 9 (2). pp. 43-69. E-ISSN 2637-0719
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Abstract
Microalgae, known for their high photosynthetic efficiency, offer a promising approach for CO₂ sequestration and the production of high-value products such as single-cell proteins (SCP). However, low CO₂ solubility in water and strain-specific tolerance limit CO2 fixation efficiency. This study aimed to optimizeCO₂ fixation and SCP production in freshwater Chlorella vulgaris using the Taguchi Orthogonal Array method. Key parameters, namely light (5-15 kLx), CO₂ concentration (1–5%), and nitrogen content (0–1 g/L), were investigated in a 2-L Schott glass bottle. Process validation was performed within the same system, and a comparative assessment was subsequently conducted against a 2-L flat-panel photobioreactor (FPPBR) to determine any differences in cultivation performance. Results showed that biomass productivity had a greater influence on CO₂ fixation (9.05%) and protein yield (45.78%) than CO₂ concentration or nitrogen content. Notably, the flat-panel PBR achieved superior growth performance (47.67%), highlighting the importance of reactor design. Logistic growth modeling fitted with Taguchi-derived growth rates showed a good fit to the data (R² = 0.6–0.93), supporting the optimization framework. These findings provide valuable insights for enhancing microalgae CO₂ capture and SCP production, although further refinement of cultivation systems and kinetic models is necessary.
| Item Type: | Article (Journal) |
|---|---|
| Uncontrolled Keywords: | carbon capture, carbon fixation, microalgae cultivation, single-cell protein |
| Subjects: | Q Science > QR Microbiology T Technology > TP Chemical technology T Technology > TP Chemical technology > TP248.13 Biotechnology |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Engineering |
| Depositing User: | Mrs. Azlin Suhaida Azmi |
| Date Deposited: | 07 May 2026 10:27 |
| Last Modified: | 07 May 2026 10:27 |
| Queue Number: | 2026-04-Q3096 |
| URI: | http://irep.iium.edu.my/id/eprint/128687 |
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