Advanced Thermochemical Conversion Approaches for Green Hydrogen Production from Crop Residues

JOURNAL OF RENEWABLE MATERIALS, Год журнала: 2023, Номер 12(1), С. 1 - 28

Опубликована: Дек. 12, 2023

The huge volumes of crop residues generated during the production, processing, and consumption farm products constitute an ecological nuisance when ineffectively managed. conversion to green hydrogen is one sustainable management strategies for ubiquitous residues. Production from residue sources will contribute deepening access clean affordable energy, mitigating climate change, ensuring environmental sustainability. However, deployment conventional thermochemical technologies costly, requires long residence time, produces low-quality products, therefore needs be upgraded. current review examines conventional, advanced, integrated production. After a brief overview techniques, delves into broad narration advanced including catalytic pyrolysis, microwave co-pyrolysis, hyropyrolysis, autothermal pyrolysis. study advocates anaerobic digestion, gasification ensure scalability, decomposition recalcitrant feedstocks, generation high grade hydrogen. outlook provides suggestions future research cost-saving production towards achieving carbon neutrality circular bio-economy.

Язык: Английский

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Removal of metals and emergent contaminants from liquid digestates in constructed wetlands for agricultural reuse

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Июнь 6, 2024

Given the increasing pressure on water bodies, it is imperative to explore sustainable methodologies for wastewater treatment and reuse. The simultaneous presence of multiples contaminants in complex wastewater, such as liquid effluents from biogas plants, can compromise biological effectiveness reclaiming water. Vertical subsurface flow constructed wetlands were established low-cost decentralized technologies treat fraction digestate municipal organic waste with metals, antibiotics, antibiotic resistance genes, allow its reuse irrigation. Twelve lab-scale planted assembled gravel, light expanded clay aggregate sand, testing four different treating conditions (liquid spiked oxytetracycline, sulfadiazine, or ofloxacin, at 100 μg/ L, without dosing) during 3 months. Physicochemical parameters (pH, chemical oxygen demand (COD), nutrients, antibiotics), microbial communities dynamics (through 16S high-throughput sequencing) genes removal (qPCR) monitored influents effluents. Systems removed 85.8%–96.9% matter (as COD), over 98.1% ammonium phosphate ions, 69.3%–99.4% nitrate nitrite no significant differences between absence antibiotics. Removal Fe, Mn, Zn, Cu, Pb Cr exceeded 82% all cycles. also sulfadiazine ofloxacin 99%, decreased intl1, tetA, tetW , sul1 qnrS gene copies. Nonetheless, after months dosing, started being detected. processes relied high HRT (14 days) various mechanisms including sorption, biodegradation, precipitation. Microbial community diversity changed significantly a decrease initial Firmicutes dominance, but clear effect antibiotics structure. Removals above 85% 94% observed Streptococcus Clostridium, respectively. Results suggest that vertical suitable technology irrigation agricultural systems, contributing circular bioeconomy concept. However, more profound understanding effective strategies needed avoid dissemination.

Язык: Английский

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Assessing Digestate at Different Stabilization Stages: Application of Thermal Analysis and FTIR Spectroscopy

Eng—Advances in Engineering, Год журнала: 2024, Номер 5(3), С. 1499 - 1512

Опубликована: Июль 19, 2024

Anaerobic digestion is a biological process that transforms high-strength organic effluents into biogas with multiple benefits. However, concurrent organics’ transformation, liquid phase high solid content also derived from this process. Valorizing fraction not an easy task if agronomic application cannot be considered as suitable option. The thermal valorization of allows for energy extraction but gives rise to additional capital investment and increases the demand global In addition, treatment digestate has deal mineralized material. changes in matter due anaerobic were studied present manuscript, by evaluating behavior samples, activation energy, transformation using Fourier transform infrared (FTIR) spectroscopy. Digested samples mixture composed manure glycerin (5% v/v) studied. stabilization caused dramatic decrease aliphatic compounds, greatly increasing mineral sample. Results differential scanning calorimetry (DSC) indicated 11 kJ/g feed material reduction 9.6 long-term stabilized was 249.5 kJ/mol, whereas value reduced 70–80 kJ/mol digested samples. If route selected digestates conversion, lower more complex structure these materials (higher lignin protein-type compounds) must carefully evaluated.

Язык: Английский

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Current and prognostic overview of digestate management and processing practices, regulations and standards

Biocatalysis and Agricultural Biotechnology, Год журнала: 2024, Номер 61, С. 103345 - 103345

Опубликована: Сен. 6, 2024

Язык: Английский

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New insights into anaerobic digestion of lignocellulosic wastes towards carbon neutrality: A review of current advancement and future prospects

Journal of Water Process Engineering, Год журнала: 2024, Номер 68, С. 106584 - 106584

Опубликована: Ноя. 20, 2024

Язык: Английский

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