Grass for biogas production: The impact of silage fermentation characteristics on methane yield in two contrasting biomethane potential test systems

McEniry, J.; Allen, Eoin; Murphy, Jerry D.; O’Kiely, P.

doi:10.1016/j.renene.2013.09.052

Cited by 69 publications

(45 citation statements)

References 13 publications

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“…Hence, delaying harvest of reed canarygrass after the end of July is not an interesting option for producing methane because both crop biomass DM yield and specific methane yield from silage would decrease. Our results also confirm that grass silage fermentation characteristics have little effect on specific methane yield (McEniry et al 2014).…”

Section: Reed Canarygrass For Bioenergy Productionsupporting

confidence: 84%

“…Grasses are likely to be conserved as silage prior to their use in anaerobic digesters for methane production (Massé et al 2011;Pakarinen et al 2011;McEniry et al 2014) and even for cellulosic ethanol production (Thomsen et al 2008;Emery et al 2015). Although the ensiling potential of reed canarygrass harvested as a forage is relatively well known, very few studies have looked at its ensiling potential when harvested once late in the season.…”

Section: Introductionmentioning

confidence: 99%

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Reed canarygrass crop biomass and silage as affected by harvest date and nitrogen fertilization

et al. 2016

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Section: Reed Canarygrass For Bioenergy Productionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Reed canarygrass crop biomass and silage as affected by harvest date and nitrogen fertilization

et al. 2016

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“…Grass is a class of biomass easily found in urban areas, and was reported previously to produce value added products such as activated carbon (Kalyani et al 2013), nitrogen-doped carbon materials (Liu et al 2012), and biogas (McEniry et al 2014;Meyer et al 2014). However, few studies have been done that provide valuable information regarding the characteristics of hydrochar from HTC lawn grass at different residence times.…”

Section: Introductionmentioning

confidence: 99%

Chemical, Energetic, and Structural Characteristics of Hydrothermal Carbonization Solid Products for Lawn Grass

Guo¹,

Dong²,

Liu³

et al. 2015

BioResources

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Hydrothermal carbonization (HTC) of lawn grass was carried out at 200 °C and 240 °C for 30 to 180 min. The chemical, energetic, and structural characteristics of HTC solid residues were investigated. Results from HTC experiments indicate that solid mass yield of all solid residues was 31 to 50%. The hydrogen/carbon (H/C) and oxygen/carbon (O/C) atomic ratios of all solid residues were 1.17 to 1.64 and 0.45 to 0.65, respectively. The higher heating value (HHV) increased up to 20.54 MJ/kg with increasing HTC residence time at 240 °C for 180 min. Both XRD patterns and FTIR spectra show that differences occur with samples treated as compared to the raw material. Solid hydrochar exhibited higher ordered structure characteristics and was mainly derived from amorphous components degradation when the residence time was increased from 30 to 180 min at 200 °C, while hydrochar formed from cellulose components degradation with increased residence time at 240 °C. According to the results studied, it was found that prolonged residence time was favorable to the formation of hydrochar from lawn grass.

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“…Additionally, silage itself contains acids such as acetic and lactic acid which are easily degradable substrates for the microorganisms. Improved biogas production with maize silage has been reported previously as a result of heterofermentive lactic acid fermentation and presence of other organic acids [36].…”

Section: Biogas Production With Fresh Maize and Maize Silage In Batchmentioning

confidence: 80%

Effect of Lactate and Starter Inoculum on Biogas Production from Fresh Maize and Maize Silage

Satpathy¹,

Steinigeweg²,

Siefert³

et al. 2017

AiM

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Lactate is a key intermediate during anaerobic digestion of carbohydrates; however, it fails to receive significant consideration in biogas plants. We examined the influence of lactic acid on biogas production. Two commonly used feeds, fresh maize and maize silage, were selected as substrates due to their difference in lactic acid contents. Additionally, inocula from an agriculture-based biogas plant, a waste water treatment plant and a standardised laboratory reactor were selected to investigate the impact of starter culture on the process. Experiments demonstrated increased total biogas yield of up to 45% in the lactate-rich maize silage over the lactate-devoid fresh maize, but only in cases where the starting inocula had been previously exposed to lactic acid. Our findings suggest lactic acid is a significant intermediate in biogas production and merits consideration. Additionally, the ability of the starter inoculum to utilize lactic acid is an important factor in process optimization and enhanced biogas production.

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Grass for biogas production: The impact of silage fermentation characteristics on methane yield in two contrasting biomethane potential test systems

Cited by 69 publications

References 13 publications

Reed canarygrass crop biomass and silage as affected by harvest date and nitrogen fertilization

Reed canarygrass crop biomass and silage as affected by harvest date and nitrogen fertilization

Chemical, Energetic, and Structural Characteristics of Hydrothermal Carbonization Solid Products for Lawn Grass

Effect of Lactate and Starter Inoculum on Biogas Production from Fresh Maize and Maize Silage

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