Comprehensively evaluating the digestive performance of sludge with different lignocellulosic components in mesophilic anaerobic digester

Chen, Yongdong; Yang, Haifeng; Zhao, Zhengyan; Zou, Huijing; Zhu, Ruilin; Jiang, Qin; Sun, Tong; Li, Mingxing; Li, Li; Shi, Dezhi; Ai, Hainan; He, Qiang; Gu, Li

doi:10.1016/j.biortech.2019.122042

Cited by 39 publications

(4 citation statements)

References 44 publications

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“…Since all four stages take place in one bioreactor, AD is a fragile biological process that can easily be disrupted resulting in activity inefficiency or even complete failure. The equilibria of AD depend on feedstock characteristics [77,78], temperature [79,80], pH [81], microbial community [82], solid-liquid ratio [83], inhibitory compounds [84], etc. In general, temperatures of 10-65 • C [85], pH of 5.0-8.5 (5.5-7.0 for hydrolysis and acidogenesis, 6.8-8.5 for methanogenesis) [85,86], C/N ratios of 20-35 [87,88] and solids loadings of 20-40% [89] are the optimal ranges for methane yield.…”

Section: Major Factors Affecting Biogas Productionmentioning

confidence: 99%

Advances in biological techniques for sustainable lignocellulosic waste utilization in biogas production

Gao

Alshehri

et al. 2022

Renewable and Sustainable Energy Reviews

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Section: Major Factors Affecting Biogas Productionmentioning

confidence: 99%

Advances in biological techniques for sustainable lignocellulosic waste utilization in biogas production

Gao

Alshehri

et al. 2022

Renewable and Sustainable Energy Reviews

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“…To analyze the behavior of the anaerobic digestion, another kinetic model, the modified Gompertz model, was applied to evaluate the AD performance according to multiple parameters (such as simulative methane yield, maximum methane production rate, and lag phase) of the AD process. , It is presented in eq where G t represents the cumulative methane yield (CMY, mL/g) for digestion time t (day), G o is the simulative CMY, λ is the lag phase (day), and R max is the simulative maximum daily methane yield (DMY, mL/(g day)).…”

Section: Methodsmentioning

confidence: 99%

Section: Methanogenesis Kineticsmentioning

confidence: 99%

Contribution of Microbial Acclimation to Lignite Biomethanization

Zhao

Xia

et al. 2020

Energy Fuels

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Understanding the bioconversion process of lignite to methane is an important contribution to the establishment of effective utilization of the existing coal resources and the acquisition of environmental biofuels. Microorganisms from coal seams were acclimatized using lignite as the sole carbon source to improve the bioavailability of coal. The contribution of acclimation to biomethanation was discussed from the aspects of mathematical models, the changes of key intermediates in the liquid phase, and the dynamic evolution of the community structure. The results showed that the anaerobic digestion (AD) efficiency of lignite was significantly improved after acclimation. The methane yield revealed that the methane-producing capacity of the bacteria and the bioavailability of lignite were enhanced. The data of 16S rDNA also suggested that the diversity of the bacterial and archaeal communities increased significantly. The stability of the AD system was enhanced. The abundance and types of bacterial genera that had a symbiosis with methanogens increased. The gene function abundance and the reading number of the bacteria in terms of membrane transport, cell motility, and xenobiotic biodegradation and metabolism were significantly improved with acclimation. This study provides an experimental basis for microbially enhancing coalbed methane (MECBM) and clean energy production.

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“…Further confirmation of the presence of calcium carbonate in the SSB comes from the X-ray diffraction analysis already carried out as calcite. After 900 • C, the fourth stage arrives where lignin decomposition can continue even though its existence is low in sewage sludge [42,43] but its pyrolysis is a slow process that occupies a wide temperature range [36,42,44].…”

Section: Tg-dtg Tg-ms and Dsc Analysismentioning

confidence: 99%

Physicochemical Characterization, Thermal Behavior, and Pyrolysis Kinetics of Sewage Sludge

Messaoudi,

Koukouch,

Bakhattar

et al. 2024

Energies

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Pyrolysis is an energy recovery technique with significant potential for managing wastewater treatment plant byproducts. This research aims to investigate the physicochemical and thermal properties of Moroccan sludge, as well as the behavior of its decomposition during pyrolysis at three different heating speeds (5, 10, and 20 K/min). Characterization of the sludge before pyrolysis through ultimate analysis, proximate analysis, FTIR spectroscopy, and XRD revealed that the sludge consists predominantly of organic matter, with a volatile matter rate of 48%, an ash rate of 37%, and a higher heating value (HHV) of 15 MJ/kg. The TGA-DTG curves identified four distinct stages in the sludge decomposition process: drying, decomposition of organic matter, degradation of calcium carbonate, and decomposition of inorganic matter. Using TG-MS analysis, the principal gases identified during pyrolysis were H2O, H2, CH4, CO2, CO, NO, and SO. The average activation energies (Ea) determined through kinetics models were found to be 413.4 kJ/mol for the Kissinger–Akahira–Sunose (KAS) model, 419.6 kJ/mol for the Flynn–Wall–Ozawa (FWO) model, and 416.3 kJ/mol for the Starink model. The values of Ea and the pre-exponential coefficient (A) obtained through the KAS, FWO, and Starink techniques are consistent with ΔG values ranging between 152 and 155 KJ/mol. The positive ΔS values range from 0.003 to 1.415 kJ/mol.K, indicating the complexity of the sludge response during pyrolysis and the spontaneity of the chemical reaction at high temperatures. The kinetic data obtained serves as a pillar for the development and improvement of sewage sludge pyrolysis systems, reinforcing their role in sustainable energy production.

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Comprehensively evaluating the digestive performance of sludge with different lignocellulosic components in mesophilic anaerobic digester

Cited by 39 publications

References 44 publications

Advances in biological techniques for sustainable lignocellulosic waste utilization in biogas production

Advances in biological techniques for sustainable lignocellulosic waste utilization in biogas production

Contribution of Microbial Acclimation to Lignite Biomethanization

Physicochemical Characterization, Thermal Behavior, and Pyrolysis Kinetics of Sewage Sludge

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