Valorising Agricultural Residues through Pelletisation

Duca, Daniele; Maceratesi, Vittorio; Fabrizi, Sara; Toscano, Giuseppe

doi:10.3390/pr10020232

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…The described phenomena are confirmed by the studies of other authors [59]. However, the length of pellets correlates with their kinetic durability, where longer pellets indicate higher factors of mechanical strength [60], which was also visible in the performed analysis: low bulk density (long pellets) was found at the highest obtained kinetic durability.…”

Section: Bulk Densitysupporting

confidence: 85%

A comprehensive study of buckwheat husk co-pelletization for utilization via combustion

Yildiz

Cwalina

Obidziński

2022

Biomass Conv. Bioref.

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Buckwheat husks are a valuable source of carbon and show the potential to be used as an energy source. However, due to low bulk density and low susceptibility to compaction, it is beneficial to use them in the form of co-pellets. The study presents comprehensive research detailing buckwheat husks’ potential for co-pelletization with oily (peanut husks) and dusty (senna leaves) agri-food wastes, whereas the effect of material parameters such as the amount of additive (10, 15, 20%) and the process parameters as the die rotational speed (170, 220, 270 rpm) on pellets’ quality (kinetic durability, bulk and particle density, degree of compaction) and the energy consumption of the pelletization process were examined. Ten percent of potato pulp as a binder was added to each pelletized mixture. It was found that an increase in the senna leaf content affects positively the kinetic durability of pellets. The fatty peanut husks have a negative effect on the pellets’ quality (measured by the kinetic durability and bulk density); however, both additions of senna leaves and peanut husks are lowering the energy consumption of the pelletizer. The highest quality pellets and the addition of 10% peanut husks to buckwheat husks (kinetic durability of 96%) and 20% of senna leaves to buckwheat husks (kinetic durability of 92%) obtained at 170 rpm were subjected to combustion in a fixed-bed unit, and the content of CO, CO2, NO, SO2, HCl, and O2 in the fuel gases was measured. The emission factors were higher than the Ecodesign limitations (CO > 500 mg·Nm−3, NO > 200 mg·Nm−3). The obtained results indicate that buckwheat husks can be successfully co-pelletized with other waste biomass; however, the pellets to be combusted require a boiler with improved air-supplying construction.

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Section: Bulk Densitysupporting

confidence: 85%

A comprehensive study of buckwheat husk co-pelletization for utilization via combustion

Yildiz

Cwalina

Obidziński

2022

Biomass Conv. Bioref.

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“…Estando ausente nas resoluções previamente relatadas, o Poder Calorífico Inferior (PCI), é caracterizado pela energia efetiva disponível por unidade de massa de combustível após as perdas com a evaporação da água (Duca et al, 2022). Nessas Como resultado dos processos vislumbrados no fluxograma, stream D, da Figura 1, a Tabela 4 apresenta para ambos os combustíveis as frações molares dos produtos advindos da combustão completa.…”

Section: Resultsunclassified

Análise da combustão de biometano a partir de resíduos sólidos urbanos para inserção na rede de gás natural

Santos

Oliveira

Sousa

et al. 2022

RSD

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Com o crescimento da população e o aumento da demanda por energia surge a necessidade de desenvolvimento de fontes alternativas energia. O biometano, obtido a partir da purificação do biogás, que pode ser retirado da decomposição resíduos sólidos urbanos, presente em quantidades abundantes em muitas cidades brasileiras, tem se despontado como uma interessante alternativa a fim de complementar a utilização combustíveis gasosos, visto que o principal combustível utilizado atualmente é o gás natural, de origem fóssil e com impactos ambientais negativos em sua extração. Este trabalho promove a análise da viabilidade energética e ambiental da utilização do biometano para a injeção na rede de gás de natural, a partir de ferramentas de simulações computacionais. Os resultados obtidos, indicam que as emissões dos gases da combustão do gás natural e do biometano são praticamente equivalentes e, a diferença nos valores de temperatura de chama entre os combustíveis é de cerca de 7,1%. Assim, a inserção do biometano na rede de gás natural, além de não implicar no aumento de impactos ambientais também não promove perdas significativas nas características energéticas da mistura.

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“…This can be explained by the fact that PT-3 pellets were more compact compared to the other two types and did not break. The higher mechanical strength of PT-3 pellets could be due to a more homogeneous mixture obtained by grinding sawdust with precut wool; this indicates that the biomass preparation process plays a crucial role in pelletization [41]. The well-formed pellets were mostly collected in the 8 mm (PT-3, 53.95%) and 4 mm (PT-1 83.49% and PT-2, 70.47%) sieves.…”

Section: Pellet Characterizationmentioning

confidence: 99%

Wool Agro-Waste Biomass and Spruce Sawdust: Pellets as an Organic Soil Amendment

Dal Prà,

Ugolini,

Negri

et al. 2024

Sustainability

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The production of wool is an economic burden and an issue for sheep breeders in many countries of the European Union because shorn greasy wool is defined as an animal byproduct (category 3) and must be sent to landfill as a special waste if not addressed in the textile supply chain. Nevertheless, wool is an important source of nitrogen, with high potential as agricultural renewable and sustainable organic fertilizer. To apply wool to soil, any contamination from harmful bacteria (e.g., Listeria monocytogenes and Salmonella spp.) should be excluded. In this study, we developed sheep wool pellets to test their suitability for use as an organic fertilizer. Wool was rich in N (12% of dry material) and was mixed to spruce sawdust at sawdust: wool ratios of at 2:1; 1:1 (v/v) to increase soil organic carbon. Despite the different mix of wool and sawdust, pellets were similar in size (diameter and length), and the content of the elements suited the requirements of fertilizers and did not present harmful bacteria after pelletization. Therefore, wool pellets may represent a feasible solution to provide sheep wool with an added value, introducing it in a circular economy process. However, further study is needed to test the effects of the produced fertilizing pellets in real cropping systems.

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Valorising Agricultural Residues through Pelletisation

Cited by 7 publications

References 32 publications

A comprehensive study of buckwheat husk co-pelletization for utilization via combustion

A comprehensive study of buckwheat husk co-pelletization for utilization via combustion

Análise da combustão de biometano a partir de resíduos sólidos urbanos para inserção na rede de gás natural

Wool Agro-Waste Biomass and Spruce Sawdust: Pellets as an Organic Soil Amendment

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