Biotechnological application of sustainable biogas production through dry anaerobic digestion of Napier grass
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Napier grass (Pennisetum purpureum), represents an interesting substrate for biogas production. The research project evaluated biogas potential production from dry anaerobic digestion of Napier grass using batch experiment. To enhance the biogas production from ensiled Napier grass, thermal and alkaline pre-treatments were performed in batch mode. Alkali hydrolysis of Napier grass was performed prior to batch dry anaerobic digestion at three different mild concentrations of sodium hydroxide (NaOH). The study results confirmed that NaOH pretreated sample produced high yield of biogas than untreated (raw) and hot water pretreated samples. Napier grass was used as the mono-substrate. The biogas composition of carbon dioxide (30.10%), methane (63.50%) and 5 ppm of H2S was estimated from the biogas. Therefore, fast-growing, high-yielding and organic matter-enriched of Napier grass was promising energy crop for biogas production.
KeywordsBiogas Dry anaerobic digestion LBR Napier grass Pretreatment
This research scheme was supported by the Energy Policy and Planning Office, Ministry of Energy (Thailand) and Energy Research Center of Maejo University, Sansai, Chiang Mai, Thailand. The authors would like to thank all contributors of this study.
Compliance with ethical standards
Conflict of interest
All the authors declare that they have no conflict of interest.
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