An accelerated approach of biogas production through a two-stage BioH2/CH4 continuous anaerobic digestion system from Napier grass

Pomdaeng, Prakaidao; Chu, Chen-Yeon; Sripraphaa, Kobsak; Sintuya, Hathaithip

doi:10.1016/j.biortech.2022.127709

Cited by 17 publications

(9 citation statements)

References 44 publications

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“…In order to demonstrate the two-stage bioreactor effect [ 16 ], methane yield studies in a bioreactor using substrate from Napier grass ( Pennisetum purpureum ) were performed. During the research, it was determined that a methane yield of 282 L CH 4 /kg VS was produced, which was 30% higher than that produced by a single-stage bioreactor.…”

Section: Resultsmentioning

confidence: 99%

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Changes in Microbiota Composition during the Anaerobic Digestion of Macroalgae in a Three-Stage Bioreactor

Vasiliauskienė,

Pranskevičius,

Dauknys

et al. 2024

Microorganisms

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The use of microalgae as a raw material for biogas production is promising. Macroalgae were mixed with cattle manure, wheat straw, and an inoculant from sewage sludge. Mixing macroalgae with co-substrates increased biogas and methane yield. The research was carried out using a three-stage bioreactor. During biogas production, the dynamics of the composition of the microbiota in the anaerobic chamber of the bioreactor was evaluated. The microbiota composition at different organic load rates (OLRs) of the bioreactor was evaluated. This study also demonstrated that in a three-stage bioreactor, a higher yield of methane in biogas was obtained compared to a single-stage bioreactor. It was found that the most active functional pathway of methane biosynthesis is PWY-6969, which proceeds via the TCA cycle V (2-oxoglutarate synthase). Microbiota composition and methane yield depended on added volatile solids (VSadded). During the research, it was found that after reducing the ORL from 2.44 to 1.09 kg VS/d, the methane yield increased from 175.2 L CH4/kg VSadded to 323.5 L CH4/kg VSadded.

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Section: Resultsmentioning

confidence: 99%

“…For biogas production using macroalgae and co-substrates, single- or two-stage bioreactors are usually used [ 14 , 15 ]. A two-stage bioreactor can produce about 30% more energy than a single-stage bioreactor [ 16 ]. High methane yields can be achieved using a three-stage bioreactor.…”

Section: Introductionmentioning

confidence: 99%

Changes in Microbiota Composition during the Anaerobic Digestion of Macroalgae in a Three-Stage Bioreactor

Vasiliauskienė,

Pranskevičius,

Dauknys

et al. 2024

Microorganisms

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“…Similarly, giant grasses, such as napier grass, have low anaerobic digestibility due to their high content of lignocellulose [48]. Experimental reports using napier grass mixed with livestock manure for methane production suggest that the methane yield from solid matter of napier grass ranges from 40% to 50% [49,50].…”

Section: Discussionmentioning

confidence: 99%

Effects of Sewage Treatment Water Supply on Leaf Development and Yield of Tuberous Roots in Multilayered Sweet Potato Cultivation

et al. 2023

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To develop a way to mass-produce sweet potatoes (Ipomoea batatas (L.) Lam.) as an energy crop to replace fossil fuels, the effects of using a sewage supply as a fertilizer and heat source were investigated. When 25 pots planted with sweet potato vine seedlings were arranged in three layers and cultivated for 160 days from June to November by supplying treated sewage to the root zone, the yield of tuberous roots reached 19.5 kg m−2 due to the massive growth of leaves. In addition, when sweet potato seedlings were replanted in December and treated sewage was supplied to maintain the irrigation water temperature above 15 °C even in winter, overwintering cultivation was successful and 8.4 kg m−2 of tuberous roots were harvested in July. As a result, the annual production rate for 12 months increased to 25.3 kg m−2, about 10 times the national average of 2.4 kg m−2 for open-field cultivation. The results far exceed previously reported maximum production of resource crops, such as sugarcane and eucalyptus, suggesting that the mass production of sweet potatoes by supplying treated sewage could provide an alternative to fossil fuels on a large scale.

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“…Therefore, environmentally friendly new energy sources are inevitable for sustainable development [ 1 ]. Anaerobic digestion is one of the effective means of producing clean energy from various agricultural wastes [ 2 ], and its resource gas products are usually hydrogen, methane and carbon dioxide [ 3 ]. Hydrogen is a clean fuel with a high energy density (142 kJ/g) [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of food wastes based on different components on digestibility and energy recovery in hydrogen and methane co-production

Gu,

Xing,

Zhang

et al. 2024

Heliyon

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An accelerated approach of biogas production through a two-stage BioH2/CH4 continuous anaerobic digestion system from Napier grass

Cited by 17 publications

References 44 publications

Changes in Microbiota Composition during the Anaerobic Digestion of Macroalgae in a Three-Stage Bioreactor

Changes in Microbiota Composition during the Anaerobic Digestion of Macroalgae in a Three-Stage Bioreactor

Effects of Sewage Treatment Water Supply on Leaf Development and Yield of Tuberous Roots in Multilayered Sweet Potato Cultivation

Effects of food wastes based on different components on digestibility and energy recovery in hydrogen and methane co-production

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