Enhanced biomethane generation from the anaerobic digestion of wilted corn straw via control in mesophilic and thermophilic temperature intervals

He, Huiban; Wang, Ziyu; Ji, Yan; Wang, Weiwei; Zhu, Jinbo; Chen, Jingkang; Liu, Daicheng; Wang, Hongliang; Cui, Zongjun; Yuan, Xufeng

doi:10.1016/j.fuel.2023.128616

Cited by 9 publications

(3 citation statements)

References 30 publications

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“…This study confirms that the temperature plays a crucial role in the anaerobic degradation process of a mixture of plant and animal waste substrates, with its impact on this process being more significant than the influence of acid concentration [45][46][47]. The findings of the authors in [48] are also confirmed, stating that the loss of thermal energy in biogas anaerobic degradation primarily involves the consumption of heat, necessary to elevate the temperature of incoming raw materials for fermentation, as well as the thermal consumption for transportation into the fermenter.…”

Section: Discussion Of the Resultssupporting

confidence: 76%

Enhancing the Fermentation Process in Biogas Production from Animal and Plant Waste Substrates in the Southeastern Region of Bulgaria

Terziev,

Zlateva,

Ivanov

2024

Fermentation

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Annually, a huge amount of waste from plant biomass and animal manure is produced from agriculture and animal farming. Many studies provide information on the biomethane potential of agricultural and livestock wastes, but only a few studies have investigated the application of the substrates in combination. The objective of the study is to enhance the fermentation process in the digester for biogas production, obtained from animal and plant waste substrates. In four batch processes for three months, the temperatures and the residence time of the substrates in the fermenter were analyzed. Simultaneously, electricity and thermal energy were produced via cogeneration units, which were exported to the public grid and city heating network. The plant substrate is a silage mixture of corn and wheat waste. The animal substrate is a mixture of beef and pig manure. Animal and vegetable waste raw materials are collected and transported to the site, located in the region of southeastern Bulgaria. The total annual consumption of animal and plant waste is 17,971 t/year. The enhancement of the process leads to the production of 1,506,000 Nm3 CH4/a of methane, the generation of which requires 299.63 MWh/a of electricity and 649.09 MWh/a thermal energy.

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Section: Discussion Of the Resultssupporting

confidence: 76%

Enhancing the Fermentation Process in Biogas Production from Animal and Plant Waste Substrates in the Southeastern Region of Bulgaria

Terziev,

Zlateva,

Ivanov

2024

Fermentation

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“…Compared with single-phase high-solid sludge AD, the total methane production improved by 81.6% (M-T/mesophilic) or 74.8% (M-T/thermophilic). Chen and Chang (2020) compared the T-M and M-T two-phase sludge AD [13]. The acidification phase affects the methanogenic degree by changing methanogen composition and enhancing the system stability by enriching Methanosarcina.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with single-phase sludge AD (mesophilic or thermophilic), the total methane production improved by 23.1% (T-M/mesophilic) and 11.9% (M-T/thermophilic). He et al (2023) investigated the effect of conventional and intermittent temperatures on methanogenic performance, and microbial regulation of anaerobic fermentation was investigated. The results showed that the hydrolysis rate increased with the increase in temperature [14].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Thermophilic–Mesophilic and Mesophilic–Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity

Wang,

et al. 2023

Microorganisms

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This study investigated the performance of thermophilic–mesophilic (T-M) and mesophilic–thermophilic (M-T) two-phase sludge anaerobic digestion at different inoculation proportions after a change in digestion temperature. After temperature change, the pH, total ammonia nitrogen (TAN), free ammonia nitrogen (FAN), solubility chemical oxygen demand (SCOD), and total alkalinity (TA) levels of two-phase digesters were between thermophilic control digesters and mesophilic control digesters. However, the volatile fatty acid (VFA) levels of two-phase digesters were higher than those of thermophilic or mesophilic control digesters. The bacteria communities of M-T two-phase digesters were more diverse than those of T-M. After a change in digestion temperature, the bacterial community was dominated by Coprothermobacter. After a change of digestion temperature, the relative abundance (RA) of Methanobacterium, Methanosaeta, and Methanospirillum of M-T two-phase digesters was higher than that of T-M two-phase digesters. In comparison, the RA of Methanosarcina of T-M two-phase digesters was higher than that of M-T two-phase digesters. The ultimate methane yields of thermophilic control digesters were greater than those of mesophilic control digesters. Nevertheless, the ultimate methane yield levels of M-T two-phase digesters were greater than those of T-M two-phase digesters. The ultimate methane yields of all two-phase digesters presented an earlier increase and later decrease trend with the increasing inoculation proportion. Optimal methane production condition was achieved when 15% of sludge (T-M15) was inoculated under mesophilic–thermophilic conditions, which promoted 123.6% (based on mesophilic control) or 27.4% (based on thermophilic control). An optimal inoculation proportion (about 15%) balanced the number and activity of methanogens of high-solid sludge anaerobic digestion.

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Optimization of semi-continuous dry anaerobic digestion process and biogas yield of dry yellow corn straw: Based on “gradient anaerobic digestion reactor”

Chen,

Liu,

Zhao

et al. 2023

Bioresource Technology

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Enhanced biomethane generation from the anaerobic digestion of wilted corn straw via control in mesophilic and thermophilic temperature intervals

Cited by 9 publications

References 30 publications

Enhancing the Fermentation Process in Biogas Production from Animal and Plant Waste Substrates in the Southeastern Region of Bulgaria

Enhancing the Fermentation Process in Biogas Production from Animal and Plant Waste Substrates in the Southeastern Region of Bulgaria

Comparison of Thermophilic–Mesophilic and Mesophilic–Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity

Optimization of semi-continuous dry anaerobic digestion process and biogas yield of dry yellow corn straw: Based on “gradient anaerobic digestion reactor”

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