Publicações - engenharias
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SOUSA, ARON PINTO DE;
Regina Weinschutz;
MOTTA, ANTONIO CARLOS VARGAS;
Alvaro Luiz Mathias
Palavra-chave:
solid waste;
solid waste minimization;
agricultural sustainability;
sustainable food production;
brazilian agroindustry
Áreas do conhecimento:
Outros;
Engenharias; Engenharia Sanitária; Saneamento Básico; Residuos Sólidos, Domésticos e Industriais;
Engenharias; Engenharia Química; Processos Ambientais e Tecnologias Limpas
resumo ...
(en)
This study revealed that the yerba mate residue (YME) generated in producing Ilex paraguariensis tea extract is non-hazardous and non-inert. Reintroduced YME can make Mn, Fe and Zn available in yerba mate cultivation soil. A dose of YME (84.6, 56.4, 28.2, 14.1 t.ha-1 or not = control) was reintroduced into 5 recipient areas of the yerba mate forest in Paraná, Brazil to avoid unnecessary disposal from YME to landfill. The effect of reintroducing YME was evaluated in terms of soil change (potassium, phosphorus, sodium, calcium, magnesium, pH, and electrical conductivity) for two depths (0 to 10 cm or 10 to 20 cm), change in leaf composition, and growth of its branches for up to 210 days. YME agricultural recycling increased (p<0.05) the potassium content in both soil layers from the 90th day onwards and was beneficial for leaf productivity and branch growth. Additional studies must be carried out to determine the long-term effects. Even so, YME recycling is recommended to minimize the export of nutrients from the soil since there are no agronomic, sanitary, and safety restrictions, offering an innovative and environmentally sustainable solution for this industrial waste of yerba mate extract. Additionally, recycling minimizes unnecessary expenses with soil improver for small yerba mate producers. It extends the useful life of the landfill, which is also advantageous for the community surrounding the company.
(es)
Residuos de yerba mate (YME) generados en la producción de extracto de té de yerba mate de Ilex paraguariensis St.-Hil. Contiene nutrientes que pueden mejorar la calidad del suelo. Este estudio tuvo como objetivo evaluar el impacto del reciclaje agrícola en las propiedades del suelo y las plantas durante hasta 210 días. Se aplicaron dosis de YME de hasta 84,6 ton.ha-1 de manera superficial durante el mes de cosecha de una planta forrajera ubicada en Paraná, Brasil. Se evaluaron parámetros del suelo como potasio, fósforo, sodio, calcio, magnesio, pH y conductividad eléctrica a dos profundidades (0 a 10 cm y 10 a 20 cm), junto con la composición foliar, la producción y el crecimiento de las ramas. Las consideraciones agronómicas, sanitarias y de seguridad no indicaron restricciones al reciclaje. El reciclaje aumentó significativamente (p<0,05) el contenido de potasio en ambas capas del suelo a partir del día 90, aunque no se observaron efectos adicionales en otros parámetros del suelo hasta el día 210. El reciclaje tuvo un impacto positivo en el crecimiento de las ramas y la productividad de las hojas. Por lo que se recomienda el reciclaje para minimizar la exportación de nutrientes del suelo, ofreciendo una solución innovadora y ambientalmente sustentable para la disposición de estos residuos industriales en la industria del té de yerba mate.
(pt)
This study revealed that the yerba mate residue (YME) generated in producing Ilex paraguariensis tea extract is non-hazardous and non-inert. Reintroduced YME can make Mn, Fe and Zn available in yerba mate cultivation soil. A dose of YME (84.6, 56.4, 28.2, 14.1 t.ha-1 or not = control) was reintroduced into 5 recipient areas of the yerba mate forest in Paraná, Brazil to avoid unnecessary disposal from YME to landfill. The effect of reintroducing YME was evaluated in terms of soil change (potassium, phosphorus, sodium, calcium, magnesium, pH, and electrical conductivity) for two depths (0 to 10 cm or 10 to 20 cm), change in leaf composition, and growth of its branches for up to 210 days. YME agricultural recycling increased (p<0.05) the potassium content in both soil layers from the 90th day onwards and was beneficial for leaf productivity and branch growth. Additional studies must be carried out to determine the long-term effects. Even so, YME recycling is recommended to minimize the export of nutrients from the soil since there are no agronomic, sanitary, and safety restrictions, offering an innovative and environmentally sustainable solution for this industrial waste of yerba mate extract. Additionally, recycling minimizes unnecessary expenses with soil improver for small yerba mate producers. It extends the useful life of the landfill, which is also advantageous for the community surrounding the company.
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Ellen Felizardo Batista;
Larissa de Brum Passini
Palavra-chave:
landslides;
Intensity;
Risk;
Rural area
Áreas do conhecimento:
Engenharias; Engenharia Civil; Geotécnica; Encostas e sistemas de contenção
resumo ...
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KLAAR, ANNE CAROLINA RODRIGUES;
SEMAN, LAIO ORIEL;
Viviana Cocco Mariani;
LEANDRO DOS SANTOS COELHO
Palavra-chave:
classificação de séries temporais
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; aprendizado de máquina
resumo ...
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Dalberto Dias da Costa;
MEHL, VINICIUS OTTO;
AGUIAR, FRANCISCO RICARDO TABORDA
Palavra-chave:
eficiencia energetica;
Overall equipment efectiveness;
Legacy machines
Áreas do conhecimento:
Engenharias; Engenharia Mecânica; Processos de Fabricação; Maquinas de Usinagem e Conformação
resumo ...
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Claudio Bastos da Silva;
Pedro Estigarríbia Pompilio;
Theoma Muriel Sanchez Otobo;
Horacio Tertuliano dos Santos Filho
Palavra-chave:
Bayesian Model;
Channel Fading;
Particle Filter;
Signal Reconstruction
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia Elétrica; Telecomunicações; Sistemas de Telecomunicações
resumo ...
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OLIVEIRA, THAMAYNE VALADARES DE;
VIEIRA, RAFAEL BRUNO;
PONTE, HAROLDO DE ARAÚJO;
PONTE, MARIA JOSE JERÔNIMO DE SANTANA;
Carlos Itsuo Yamamoto;
SOUZA, SELENE MARIA DE ARRUDA GUELLI ULSON DE;
SOUZA, ANTÔNIO AUGUSTO ULSON DE
Palavra-chave:
catálise heterogênea
Áreas do conhecimento:
Engenharias; Engenharia Química; Catálise
resumo ...
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Vitor Henrique P. de Melo;
Andressa Lorayne Monteiro;
Larah Bruning Ascari;
Elizete Maria Lourenço;
antonio simoes costa;
João Bosco London Jr.
Palavra-chave:
Power System State Estimation;
Pre-filtering;
Network observability;
Measurement redundancy;
Metering system design
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Sistemas Elétricos de Potência; Geração da Energia Elétrica;
Engenharias; Engenharia Elétrica; Sistemas Elétricos de Potência; Estimação de Estados Em Sistemas Elétricos de Potência
resumo ...
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Eliziane Jubanski;
Sarah Lopes Tamura;
Maria Clara Cavalini Pinto;
Marienne do Rocio de Mello Maron da Costa;
Nayara Klein
Palavra-chave:
argamassa de revestimento;
Reologia;
empacotamento de partículas
Áreas do conhecimento:
Engenharias; Engenharia Civil; Inovação
resumo ...
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SILVA, BRUNO M. F.;
Eduardo Todt;
NASCIMENTO, TIAGO P.;
CURVELO, CARLA DA C. F.;
GONÇALVES, LUIZ M. G.
Palavra-chave:
Mobile robots;
Underwater Robotics;
robotics simulation
Áreas do conhecimento:
Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software;
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia Elétrica; ENGENHARIA DE COMPUTAÇÃO
resumo ...
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ABBAS, MUHAMMAD SUBTAIN;
YANG, YAJUAN;
ZHANG, QUANXI;
GUO, DONGGANG;
Ana Flavia Locateli Godoi;
Ricardo Henrique Moreton Godoi;
GENG, HONG
Palavra-chave:
salt lake aerosol;
climate change;
chemical composition;
health impacts
resumo ...
Salt Lakes, having a salt concentration higher than that of seawater and hosting unique extremophiles, are predominantly located in drought-prone zones worldwide, accumulating diverse salts and continuously emitting salt dust or aerosols. However, knowledge on emission, chemical composition, and health impacts of Salt Lake aerosols under climate change is scarce. This review delves into the intricate dynamics of Salt Lake aerosols in the context of climate change, pointing out that, as global warming develops and weather patterns shift, Salt Lakes undergo notable changes in water levels, salinity, and overall hydrological balance, leading to a significant alteration of Salt Lake aerosols in generation and emission patterns, physicochemical characteristics, and transportation. Linked to rising temperatures and intensified evaporation, a marked increase will occur in aerosol emissions from breaking waves on the Salt Lake surface and in saline dust emission from dry lakebeds. The hygroscopic nature of these aerosols, coupled with the emission of sulfate aerosols, will impart light-scattering properties and a cooling effect. The rising temperature and wind speed; increase in extreme weather in regard to the number of events; and blooms of aquatic microorganisms, phytoplankton, and artemia salina in and around Salt Lakes, will lead to the release of more organic substances or biogenic compounds, which contribute to the alteration of saline aerosols in regard to their quantitative and chemical composition. Although the inhalation of saline aerosols from Salt Lakes and fine salt particles suspended in the air due to salt dust storms raises potential health concerns, particularly causing respiratory and cardiovascular disease and leading to eye and skin discomfort, rock salt aerosol therapy is proved to be a good treatment and rehabilitation method for the prevention and treatment of pneumoconiosis and chronic obstructive pulmonary disease (COPD). It is implied that the Salt Lake aerosols, at a certain exposure concentration, likely can delay the pathogenesis of silicosis by regulating oxidative stress and reducing interstitial fibrosis of the lungs. It emphasizes the interconnectedness of climate changes, chemical composition, and health aspects, advocating for a comprehensive and practical approach to address the challenges faced by Salt Lake aerosols in an ever-changing global climate.
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