Biotechnological application of sustainable biogas production through dry anaerobic digestion of Napier grass

Abstract

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 HS was estimated from the biogas. Therefore, fast-growing, high-yielding and organic matter-enriched of Napier grass was promising energy crop for biogas production.

Leachate recirculation effects on solid‐state anaerobic digestion of Pennisetum hybrid and microbial community analysis

“…with a methane yield in the range 104–328 L kg −1 VS . But it is similar to the results of another study in which LBR was used for AD of Napier grass (biogas yield of 164 L kg −1 VS) …”

“…with a methane yield in the range 104-328 L kg −1 VS. 28,29 But it is similar to the results of another study in which LBR was used for AD of Napier grass (biogas yield of 164 L kg −1 VS). 30 In addition, the proportion of accumulative methane produced in the solid phase and the percolate recorded little difference between the continuous reflux and intermittent reflux tests. As shown in Fig.…”

Sustainability assessment of biogas production from buffalo grass and dung: biogas purification and bio-fertilizer

“…Renewable sources of energy and consumer products are required for sustainable development of modern society (Unpaprom et al 2017 ; Vu et al 2017 ). Energy demand required to meet the economic growth of Thailand is growing higher in every year (Dussadee et al 2017 ). Accordingly, Thailand has a huge potential to develop renewable energy from biomass as the country has an abundant agriculture sources such as raw materials from crops and livestock that can be used to produce biogas, specifically methane gas, through the decomposition of organic matter in the system (Dussadee et al 2014 ; Vu et al 2018 ).…”

“…Agricultural residues from the agricultural sector, agriculture industry and grassland biomass are usually used as feed materials in anaerobic digestion systems in Thailand which are suitable in numerous ways for producing energy. There are so many types of grasses that are popularly grown in Thailand (Dussadee et al 2017 ). Deb et al ( 2016 ) stated that the buffalo grass, traditionally raised in a mixed crop livestock system, has played an important role over the centuries, especially in Asia, for the lives of millions of people, by ensuring work power and food at the end of their career as work animals.…”

Chemical Kinetics of Alkaline Pretreatment of Napier Grass (Pennisetum purpureum) Prior Enzymatic Hydrolysis

“…Structural carbohydrates and lignin in the grass were determined based on National Renewable Energy Laboratory (NREL) procedures [14,28]. The percent extractives, moisture and ash were determined based on the American Society of Testing and Material standards as used by Dussadee et al [29].…”