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Enhanced volatile fatty acids production from Napier grass(Pennisetum purpureum) using micro-aerated anaerobic culture |
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| รหัสดีโอไอ | |
| Creator | 1. Chayanon Sawatdeenarunat 2. Rotjapun Nirunsin 3. Sumate Chaiprapat |
| Title | Enhanced volatile fatty acids production from Napier grass(Pennisetum purpureum) using micro-aerated anaerobic culture |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2021 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 43 |
| Journal No. | 6 |
| Page no. | 1793-1799 |
| Keyword | micro-aeration, lignocellulosic biomass, volatile fatty acids, digestate, anaerobic digestion |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | The laboratory-scale horizontal acidogenic bioreactor was conducted in semi-anaerobic and strict anaerobic conditionsusing Napier grass (Pennisetum purpureum) as the sole substrate to determine the effects of micro-aeration on organic acidsyield. During semi-anaerobic condition, total volatile fatty acids (VFAs) yield was significantly higher (ฮฑ=0.05) i.e. 3,524ยฑ191,and 2,831ยฑ89 mg/L for the micro-aerated, and anaerobic conditions, respectively. The biomethane production was effectivelysuppressed during micro-aeration as a result of methanogenesis inhibition by the controlled oxygenation. Improved hydrolysis byfacultative organisms was evidenced by the elevated soluble chemical oxygen demand concentration which was readily availablefor organic acid production. Hemicellulose in the biomass was efficiently degraded at 10.0% during micro-aerated period, whileother constituents i.e. cellulose and lignin remained in the digestate. Potential use of these co-products of VFA-rich liquor andpretreated solid digestate for higher biofuels or valuable biochemical compounds was discussed in the context of the bio-circulargreen economy model. |
