Wheat Straw Optimization via its Efficient Pretreatment for Improved Biogas Production

Memon, Muhammad Saad; Memon, Abdul Rehman

doi:10.28991/cej-2020-03091528

Cited by 37 publications

(11 citation statements)

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“…The amorphous background was characterized by a low intensity of diffraction at 2θ of between 18.30° and 18.86°. These peaks confirm the presence of a highly controlled crystalline and amorphous cellulosic structure, respectively (Memon and Memon 2020).…”

Section: X-ray Diffraction (Xrd) Analysis and Crystallinity Of The Co...mentioning

confidence: 67%

Optimization of the autoclave-assisted alkaline delignification of cocoa (Theobroma cacao) pod husks using KOH to maximize reducing sugars

Ouattara

Soro

Fanou

et al. 2021

BioRes

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Cocoa pod husks are a type of biomass that is still poorly explored. This work was carried out as part of the optimization of the delignification process for this residue with potassium hydroxide, to maximize the reducing sugars content. Screening for potentially influencing factors showed that the biomass to solvent ratio and the temperature had the greatest effect on the delignification process. Optimization of these factors using a composite central plan revealed that the quadratic model was the most suitable for predicting the rate of delignification. The predicted R² (0.815) was in good agreement with the adjusted R² (0.906). The correlation coefficient (R2 = 0.945) between the predicted and experimental results confirmed the fit of the model. The optimal conditions were a biomass to solvent ratio of 9.14% and a temperature of 128 °C, which resulted in a maximum degree of delignification of 93.9%, with 80% of the solids recovered. This study found that the removal of extractables before the pretreatment considerably improved the delignification of cocoa pod husks and the production of reducing sugars, which increased from 3.15 ± 0.006 mg/mL to 5.33 ± 0.143 mg/mL. Scanning electron microscopy and X-ray diffraction confirmed physicochemical changes in the biomass after pretreatment.

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Section: X-ray Diffraction (Xrd) Analysis and Crystallinity Of The Co...mentioning

confidence: 67%

Optimization of the autoclave-assisted alkaline delignification of cocoa (Theobroma cacao) pod husks using KOH to maximize reducing sugars

Ouattara

Soro

Fanou

et al. 2021

BioRes

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show abstract

“…The biogas yield improvement when compared with untreated wheat straw ranged from 30.4% up to 82%. Memon and Memon [64] digested alkaline pretreated wheat straw (6% KOH during 4 days) and improved the biogas yield by 45% compared with non-treated wheat straw. No significant difference was found from 30 to 45 days of cultivation in the same culture, indicating that wheat straw digestion ceased already at 30 days of cultivation.…”

Section: Physical-chemical Parametersmentioning

confidence: 99%

Effect of Alkaline and Mechanical Pretreatment of Wheat Straw on Enrichment Cultures from Pachnoda marginata Larva Gut

et al. 2023

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In order to partially mimic the efficient lignocellulose pretreatment process performed naturally in the gut system of Pachnoda marginata larvae, two wheat straw pretreatments were evaluated: a mechanical pretreatment via cutting the straw into two different sizes and an alkaline pretreatment with calcium hydroxide. After pretreatment, gut enrichment cultures on wheat straw at alkaline pH were inoculated and kept at mesophilic conditions over 45 days. The methanogenic community was composed mainly of the Methanomicrobiaceae and Methanosarcinaceae families. The combined pretreatment, size reduction and alkaline pretreatment, was the best condition for methane production. The positive effect of the straw pretreatment was higher in the midgut cultures, increasing the methane production by 192%, while for hindgut cultures the methane production increased only by 149% when compared to non-pretreated straw. Scanning electron microscopy (SEM) showed that the alkaline pretreatment modified the surface of the wheat straw fibers, which promoted biofilm formation and microbial growth. The enrichment cultures derived from larva gut microbiome were able to degrade larger 1 mm alkaline treated and smaller 250 µm but non-pretreated straw at the same efficiency. The combination of mechanical and alkaline pretreatments resulted in increased, yet not superimposed, methane yield.

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“…The occupied area is 30 hectares, and the design capacity is 333,545 m 3 /year, 230 thousand tons/year. Landfill gas (biogas) is formed as a result of the fermentation of organic constituents in waste in the landfill body during biochemical decomposition [10]. Along with gaseous decomposition products, gaseous constituents of depositions (for example, greenhouse gases) and water vapor (in a saturated state) are also formed [11].…”

Section: Figure 1 a Flowchart Of A Municipal Waste Management Systemmentioning

confidence: 99%

Implementation of a Degassing System at the MSW Landfill

Shkileva

2021

Civ Eng J

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Aitolo-Akarnania prefecture, western Greece, is an area with strong earthquakes and large active fault systems. The most, the second half of the 20th century was characterized for the world community by the aggravation of the environmental problem. Anthropogenic pollution of the environment with the growth of industrial and agricultural production, the growth of cities, the size of the population, the volume of their consumption clearly indicates that the world community is on the brink of an abyss. The destruction of forests, pollution of water bodies, degradation of soil, flora and fauna, the emergence of new diseases clearly shows that if urgent and drastic measures are not taken to save the environment, the life of future generations is problematic. In Russia, as in other countries of the world, the amount of solid household waste has been sharply increasing lately. Therefore, their processing and disposal is becoming an increasingly urgent problem that requires the adoption of complex solutions. At the same time, overcrowded and smoking landfills, as well as formed unauthorized landfills are the main sources of environmental pollution. Landfills of solid municipal waste not only cause an epidemiological hazard, but due to the anaerobic decomposition of organic waste, causing the formation of explosive biogas, become a powerful source of biological pollution. Biogas generated at MSW landfills in the process of decomposition has a toxic effect on living organisms, contributes to the outbreak of fires, and is a source of unpleasant odors. This problem must be solved by introducing a degassing system at municipal solid waste landfills already at the stage of their operation. The proposed degassing system at the MSW landfill is aimed at reducing the negative impact of biogas on the environment. Doi: 10.28991/cej-2021-03091706 Full Text: PDF

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Wheat Straw Optimization via its Efficient Pretreatment for Improved Biogas Production

Cited by 37 publications

References 0 publications

Optimization of the autoclave-assisted alkaline delignification of cocoa (Theobroma cacao) pod husks using KOH to maximize reducing sugars

Optimization of the autoclave-assisted alkaline delignification of cocoa (Theobroma cacao) pod husks using KOH to maximize reducing sugars

Effect of Alkaline and Mechanical Pretreatment of Wheat Straw on Enrichment Cultures from Pachnoda marginata Larva Gut

Implementation of a Degassing System at the MSW Landfill

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