Muhammad Alif Fitri, Hanipa and Tiang, Ming Foong and Abdullah Amru, Indera Luthfi and Mohd Shaiful, Sajab and Mimi Hani, Abu Bakar and Reungsang, Alissara and Lay, Chyi-How and Wu, Shu-Yii and Kamrul Fakir, Kamarudin and Peer Mohamed, Abdul (2024) Illumination optimization strategies to enhance hydrogen productivity and light conversion efficiency for photo-fermentation by Rhodobacter sphaeroides KKU-PS1 using a concentrated multi-substrate feedstock. International Journal of Hydrogen Energy, 88. pp. 418-431. ISSN 0360-3199. (Published)
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Abstract
With the use of biotechnology, hydrogen can be produced from wastewater rich in short-chain fatty acids. A previous study revealed the ability of Rhodobacter sphaeroides KKU-PS1 to produce biohydrogen from substrates mimicking succinate fermentation effluent. However, the process still requires optimization. Before illumination optimization, due to high concentration of the effluent, various effluent dilution factors ranging from 10 to 100 were compared, and the optimal dilution factor was determined to be 50. Light-emitting diode (LED) setups consisting of bands and tubes were compared, and various illuminated surface-to-volume ratios (S/V) were obtained. LED tubes were subsequently used for light intensity optimization in the range of 5–23 klux, revealing optimum light intensity at 15 klux, yielding 2202 mL H2/L and 13.8 mL H2/L/h as the cumulative hydrogen and maximum output rate, respectively. The lighting protocol at 15 klux and with a 6h–6h light-dark cycle improved the total light conversion efficiency by up to 3.1%. The study successfully optimized the process, with results rivalling those of a previous study using malate.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Biohydrogen; Fermentation wastewater utilization; Light conversion efficiency; Purple non-sulfur bacteria; Short-chain fatty acids |
| Subjects: | Q Science > Q Science (General) T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Industrial Sciences And Technology |
| Depositing User: | Mrs Norsaini Abdul Samat |
| Date Deposited: | 21 Nov 2024 07:56 |
| Last Modified: | 21 Nov 2024 07:56 |
| URI: | http://umpir.ump.edu.my/id/eprint/42963 |
| Download Statistic: | View Download Statistics |
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