Effects of organic loading rate on methane production from switchgrass in batch and semi-continuous stirred tank reactor system

Ünyay, Hilal; Yılmaz, Fatih; Başar, İbrahim Alper; Perendeci, Nuriye Altınay; Çoban, Işık; Şahinkaya, Erkan

doi:10.1016/j.biombioe.2021.106306

Cited by 29 publications

(13 citation statements)

References 52 publications

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“…As seen in Table 3 , with the pretreatment application, the methane production was 12.2–325.9% enhanced compared to untreated switchgrass [ 3 , 4 , 24 , 27 , 31 ]. Thermal pretreatment as microwave and steam explosion also enriched methane production by 5.2–9.1% [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. Results show that combined chemical and thermal pretreatment application seems to be more effective.…”

Section: Resultsmentioning

confidence: 99%

“…The cone model uses the kinetic parameters of the hydrolysis rate constant k and the shape factor n to predict methane production Unyay et al [ 26 ] calculated the k and n values as 0.067–0.080 and 1.7–1.9, respectively, for the anaerobic digestion of raw switchgrass at different substrate–inoculum ratios. As a result of the Ca(OH) 2 -assisted thermal pretreatment in this study, k constants increased, and the n values decreased compared to the work of Unyay et al [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

“…The AD of switchgrass, considering the methane yield for various harvesting seasons [ 15 , 16 , 17 , 18 ], co-digestion [ 19 , 20 , 21 ], AD kinetic modeling [ 22 , 23 , 24 , 25 ], and continuous AD with process performance [ 26 , 27 , 28 , 29 ], has been investigated in the literature. On the other hand, relatively limited research has been conducted on the pretreatment process to increase methane production from switchgrass [ 3 , 4 , 24 , 25 , 27 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

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Energy Crops and Methane: Process Optimization of Ca(OH)2 Assisted Thermal Pretreatment and Modeling of Methane Production

et al. 2022

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Switchgrass earned its place globally as a significant energy crop by possessing essential properties such as being able to control erosion, low cost of production, biomass richness, and appeal for biofuel production. In this study, the impact of a Ca(OH)2-assisted thermal pretreatment process on the switchgrass variety Shawnee for methane fuel production was investigated. The Ca(OH)2-assisted thermal pretreatment process was optimized to enhance the methane production potential of switchgrass. Solid loading (3–7%), Ca(OH)2 concentration (0–2%), reaction temperature (50–100 °C), and reaction time (6–16 h) were selected as independent variables for the optimization. Methane production was obtained as 248.7 mL CH4 gVS−1 under the optimized pretreatment conditions. Specifically, a reaction temperature of 100 °C, a reaction time of 6 h, 0% Ca(OH)2, and 3% solid loading. Compared to raw switchgrass, methane production was enhanced by 14.5%. Additionally, the changes in surface properties and bond structure, along with the kinetic parameters from first order, cone, reaction curve, and modified Gompertz modeling revealed the importance of optimization.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy Crops and Methane: Process Optimization of Ca(OH)2 Assisted Thermal Pretreatment and Modeling of Methane Production

et al. 2022

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“…The fundamental goal of these research was to lessen reliance on fossil fuels while avoiding as many environmental issues as possible due to their usage. [1].…”

Section: Introductionmentioning

confidence: 99%

Methane Production from Anaerobic Co-Digestion of Cow Manure and Sugarcane Bagasse Under Mesophilic Condition: Effect of Mixing Ratio

alsebiey

2022

International Journal of Applied Energy Systems

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Producing methane from wastes like sugarcane bagasse and cow manure has the dual advantages of reducing these wastes and trying to maximize energy recovery. By utilizing different mixture ratios, the research seeks to increase the methane output from the anaerobic co-digestion of cow dung (CM) with sugarcane bagasse (SB) in Aswan, Egypt. In a 700 mL glass reactor, biochemical methane potential (BMP) studies were carried out in mesophilic (35-37 °C) conditions. To find the optimum combination for the BMP tests, five mixes with CM to SB ratios of 100:0, 70:30, 50:50, 30:70, and 0:100 (based on volatile solids) were tested. In the second BMP experiments, a CM to Sb ratio of 30:70 (275 mL/g), which was greater than the individual digestion of the other used feedstock, produced the maximum methane output. The lowest methane output, however, was seen at a CM to SB ratio of 70:30. The ANOVA test was used for the results' statistical analysis.

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“…The addition of torrefied biomass to the soil improves its properties and may contribute to reducing the use of fertilizers and plant protection products. It can also increase the effectiveness of using natural fertilizers [47][48][49][50]. Due to its very low thermal conductivity and absorption properties, torrefied biomass is also used in construction to produce insulation [51,52].…”

Section: Introductionmentioning

confidence: 99%

Pine Wood and Sewage Sludge Torrefaction Process for Production Renewable Solid Biofuels and Biochar as Carbon Carrier for Fertilizers

et al. 2021

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This work presents the results of research on the thermo-chemical conversion of woody biomass–pine wood coming from lodzkie voivodship forests and sewage sludge from the Group Sewage Treatment Plant of the Łódź Urban Agglomeration. Laboratory scale analyses of the carbonization process were carried out, initially using the TGA technique (to assess activation energy (EA)), followed by a flow reactor operating at temperature levels of 280–525 °C. Both the parameters of carbonized solid biofuel and biochar as a carrier for fertilizer (proximate and ultimate analysis) and the quality of the torgas (VOC) were analyzed. Analysis of the pine wood and sewage sludge torrefaction process shows clearly that the optimum process temperature would be around 325–350 °C from a mass loss ratio and economical perspective. This paper shows clearly that woody biomass, such as pine wood and sewage sludge, is a very interesting material both for biofuel production and in further processing for biochar production, used not only as an energy carrier but also as a new type of carbon source in fertilizer mixtures.

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Effects of organic loading rate on methane production from switchgrass in batch and semi-continuous stirred tank reactor system

Cited by 29 publications

References 52 publications

Energy Crops and Methane: Process Optimization of Ca(OH)2 Assisted Thermal Pretreatment and Modeling of Methane Production

Energy Crops and Methane: Process Optimization of Ca(OH)2 Assisted Thermal Pretreatment and Modeling of Methane Production

Methane Production from Anaerobic Co-Digestion of Cow Manure and Sugarcane Bagasse Under Mesophilic Condition: Effect of Mixing Ratio

Pine Wood and Sewage Sludge Torrefaction Process for Production Renewable Solid Biofuels and Biochar as Carbon Carrier for Fertilizers

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