Publicações - engenharias
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Bráulio Farnese de Paula Lana;
Mônica Beatriz Kolicheski;
Arno Paulo Schmitz;
Alvaro Luiz Mathias;
GONTARSKI, CARLOS ALBERTO UBIRAJARA
Palavra-chave:
Cleaner Production;
solid waste;
solid waste minimization;
Industry 4.0;
expert system
Áreas do conhecimento:
Outros;
Engenharias; Engenharia Química; Bioprocessos
resumo ...
(pt)
Industry 4.0 has expanded the alternatives to design more sustainable processes. Among the technologies of this industrial phase, IoT (Internet of Things) technology allows the linkage of devices that generate data at high volumes (big data), supporting the creation of Artificial Intelligence (AI) models to perform optimal operating standards to minimize waste in the production. By means of vision sensor and AI deployment, this study aimed to reduce the polybutylene plastic waste in an extrusion line of colored tubes, in which most of the waste is generated during the color transition. For that, a vision sensor that transfers the tube color in real-time was installed, which made it possible to set acceptance ranges for the standard colors of the tubes based on the elicitation of the operators' knowledge. These ranges allowed the setup of an expert system that warns the operator, by a light signal, the right time to start the production. The suggested technology demonstrated to be 11.47% more efficient in waste reduction in color transitions. It also allowed the identification of the requirements for the deployment of this technology in plastic extrusion, so it can promote overall waste reduction, which requires improvements in operation, standardization, and employee training.
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Braulio F. P. Lana;
Monica B. Kolicheski;
Arno Paulo Schmitz;
Alvaro luiz Mathias;
Carlos A. U. Gontarski
Revista Latino-Americana de Inovação e Engenharia de Produção,
v. 12,
n. 20,
p. 74-94,
2024
DOI
Home page
Palavra-chave:
Algoritmos;
Eficiência produtiva;
Inteligência Artificial
Áreas do conhecimento:
Engenharias; Engenharia do Produto; Processos de Trabalho
resumo ...
(pt)
Industry 4.0 has expanded the alternatives to design more sustainable processes. Among the technologies of this industrial phase, IoT (Internet of Things) technology allows the linkage of devices that generate data at high volumes (big data), supporting the creation of Artificial Intelligence (AI) models to perform optimal operating standards to minimize waste in the production. By means of vision sensor and AI deployment, this study aimed to reduce the polybutylene plastic waste in an extrusion line of colored tubes, in which most of the waste is generated during the color transition. For that, a vision sensor that transfers the tube color in real-time was installed, which made it possible to set acceptance ranges for the standard colors of the tubes based on the elicitation of the operators' knowledge. These ranges allowed the setup of an expert system that warns the operator, by a light signal, the right time to start the production. The suggested technology demonstrated to be 11.47% more efficient in waste reduction in color transitions. It also allowed the identification of the requirements for the deployment of this technology in plastic extrusion, so it can promote overall waste reduction, which requires improvements in operation, standardization, and employee training.
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Emilio Carlos Zilli Ruiz;
Afonso Figueiredo Filho;
RETSLAFF, FABIANE APARECIDA DE SOUZA;
GARRETT, ALEXANDRE TECHY DE ALMEIDA;
Rodrigo Geroni Mendes Nascimento;
Mailson Roik;
KARINA HENKEL PROCEKE DE DEUS;
Carla Fernanda Mussio
Palavra-chave:
Biomass modeling;
Araucária crown;;
renewable energy;
Araucaria Forest
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Manejo Florestal; Dendrometria e Inventário Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Conservação da Natureza; Recuperação de Areas Degradadas;
Engenharias; Engenharia de Energia; Fontes Renováveis de Energia; Energia de Biomassa
resumo ...
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MAIKON DA ROCHA, EDSON;
ÁVILA, SUELEN;
DE LIMA, JAIR JOSÉ DE LIMA;
SCHEFFER DE ANDRADE SILVA, RICARDO;
MIRANDA BACILA, DANNIELE;
Alvaro Luiz Mathias;
Regina Maria Matos Jorge
Palavra-chave:
quality parameter;
processing conditions;
water bleaching
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Tecnologia de Alimentos;
Engenharias; Engenharia Química; Bioprocessos
resumo ...
(en)
The bleaching operation has been utilized to increase the shelf life, reduce enzymatic activity, and lower the microbial load of foods. This study aimed to investigate the effects of blanching time and temperature on three commercial mushroom varieties' lightness and color variation and determine the optimal operation conditions. Three specimens were collected: Agaricus bisporus Paris Champignon, Agaricus bisporus Portobello, and Lentinula edodes Shiitake. The composite central rotational design and the response surface methodology were employed to evaluate the combined effects of blanching temperature (ranging from 53.8°C to 96.2°C) and time (ranging from 10.3 seconds to 349.7 seconds) on the color parameters L* (lightness), a* (redness-greenness) and b* (yellowness-blueness) of mushrooms slices. Cutting, oxygen exposure, and temperature below 75°C significantly affected the color by reducing L* and b* values and increasing a* values, favoring the mushrooms' darkening (higher △L). The bleaching operation optimized to minimize color variation (△E) was at 80°C for 170 seconds for Champignon, 83°C for 209 seconds for Portobello, and 82°C for 186 seconds for Shitake. Blanching fresh mushrooms under these operational conditions can help prevent the development of dark color, thereby improving their quality for human consumption, extending their shelf life, and reducing waste caused by unsightly appearance.
(pt)
A operação de branqueamento tem sido utilizada para aumentar a vida útil, reduzir a atividade enzimática e diminuir a carga microbiana dos alimentos. Este estudo teve como objetivo investigar os efeitos do tempo e da temperatura de branqueamento na luminosidade e na variação de cor de três variedades comerciais de cogumelos e determinar as condições ótimas de operação. Três espécimes foram coletados: Agaricus bisporus Paris Champignon, Agaricus bisporus Portobello e Lentinula edodes Shiitake. O delineamento composto central rotacional e a metodologia de superfície de resposta foram empregados para avaliar os efeitos combinados da temperatura de branqueamento (variando de 60°C a 96,2°C) e tempo (variando de 60 segundos a 349,7 segundos) nos parâmetros de cor L* (luminosidade), a* (vermelho-verde) e b* (amarelo-azul) de fatias dos cogumelos. O corte, a exposição ao oxigênio e a temperatura abaixo de 75°C afetaram significativamente a cor, reduzindo os valores de L* e b* e aumentando os valores de a*, favorecendo o escurecimento dos cogumelos (maior △L). A operação de branqueamento otimizada para minimizar a variação de cor (△E) foi de 80°C por 170 segundos para Champignon, 83°C por 209 segundos para Portobello e 82°C por 186 segundos para Shitake. O branqueamento de cogumelos frescos nessas condições operacionais pode ajudar a prevenir o desenvolvimento de cores escuras, melhorando assim sua qualidade para consumo humano, prolongando sua vida útil e reduzindo o desperdício causado pela aparência desagradável.
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José João de Espíndola;
DE ALMEIDA PRADO, BRUNO FERRARI;
José João de Espíndola
Palavra-chave:
Optimization;
Rotordynamic;
Vibration Control in a Frequency Range;
Viscoelastic Support
Áreas do conhecimento:
Engenharias; Mecânica dos Sólidos; Vibrações
resumo ...
Viscoelastic supports (VES) are bearing-foundation systems containing viscoelastic materials with high capacity of vibration energy dissipation. The application of VES on rotating machinery allows for a safe operation around critical speeds while suppressing peaks of vibration amplification. This paper presents an experimental validation of a multi-degree-of-freedom (multi-DOF) VES independently designed with regards to viscoelastic stiffness in translational and rotational DOF. An optimal design of the multi-DOF VES is obtained using a methodology developed in previous works and a prototype is constructed and integrated into the rotating system to be experimentally validated. Run-down measurements were carried out and compared with the frequency unbalance response numerical predictions. The run-down measurements exhibit excellent agreement with numerical predictions, particularly in terms of frequency accuracy. These results highlight the effectiveness of the optimally designed multi-DOF VES in controlling the unbalance frequency response over the entire spin speed range of a dual-disc rotating system. This leads to a significant reduction in response amplitude at critical speed when compared to the rotating system supported on rigid bearings. The experimental validation of the multi-DOF VES demonstrates its capability to enhance the performance and safety of rotating machinery operating around critical speeds. The optimized design effectively mitigates response amplitudes at critical speeds, validating the methodology presented in previous works. The findings underscore the practical applicability of the proposed approach, positioning the multi-DOF VES as a valuable tool for controlling the unbalance frequency response in rotating systems.
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SIGNORI-IAMIN, GIOVANA;
AGUADO, ROBERTO J.;
TARRÉS, QUIM;
Alexandre Ferreira Santos;
DELGADO-AGUILAR, MARC
Palavra-chave:
nanocelulose;
Ciclo do CO2;
Estabilidade
Áreas do conhecimento:
Engenharias; Processos Industriais de Engenharia Química; Processos Biotecnológicos;
Engenharias; Engenharia Química; Operações Industriais e Equipamentos para Engenharia Química
resumo ...
While cationic cellulose has yet to find a place in the paper industry, manufacturers show certain interest in a more recent material: cellulose nanofibers (CNFs), generally with negative surface charge. This work suggests both to be combined to increase the mechanical properties of recycled paper while preventing the use of synthetic polyelectrolytes as retention agents. On one hand, a bleached pulp was cationized by etherification, both as-is and following mechanical refining (15,000 PFI revolutions) and submitted to high-pressure homogenization, generating two different kinds of cationic CNFs. On the other, the same pulp was submitted to an enzymatic pretreatment and high-pressure homogenization, producing a negatively charged cellulose micro/nanofiber (CMNF). Two different cellulose-based systems consisting of each type of cationic CNF and the enzymatic CMNF were applied in the papermaking of both virgin and recycled paper. This study demonstrates the effective use of the cationic CNFs as retention agents during sheet formation, which together with the enzymatic CMNFs significantly enhanced the mechanical properties of both types of paper. The study found that refining before cationization favored the retention effect, primarily due to increased surface area and charge of the cationic CNFs, where remarkable increases in the breaking length of virgin (125.1%) and recycled paper (46.5%) were reached. The synergy between cationic CNFs and enzymatic CMNFs outperformed the use of commercial polyacrylamide, a non-biodegradable polyelectrolyte. This research highlights the potential of tailored CNFs in producing high-performance papers, while promoting sustainability and offering a plausible strategy to increase paper recycling rates.
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SAVIAN, CAROLINA MENE;
Adenise Lorenci Woiciechowski;
SCAPINI, THAMARYS;
MARTINEZ-BURGOS, WALTER JOSÉ;
ZEVALLOS TORRES, LUIS ALBERTO;
ZANDONA FILHO, ARION;
RAMOS, LUIZ PEREIRA;
Soccol, Carlos Ricardo
Palavra-chave:
Agroindustrial Residues;
bioeconomy;
bioetanol;
Biorefinery;
Reaproveitamento de Resíduos;
biomass pretreatment
resumo ...
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SAVIAN, CAROLINA MENE;
SCAPINI, THAMARYS;
MARTINEZ-BURGOS, WALTER JOSÉ;
ZEVALLOS TORRES, LUIS ALBERTO;
CABRAL, PALOMA SOUZA;
CABRAL, PALOMA SOUZA;
CABRAL, PALOMA SOUZA;
CABRAL, PALOMA SOUZA
Palavra-chave:
Processos Biotecnologicos
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações
resumo ...
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MOREIRA, CAMILA ARIELLE BUFATO;
REIS, RODRIGO ARANTES;
OLIVEIRA, ANDREA;
Ricardo Henrique Moreton Godoi;
POLEZER, GABRIELA;
DOS SANTOS SILVA, JÉSSICA CAROLINE;
DE SOUZA ZORZENÃO, PRISCILA CAROLINE;
Ana Flavia Locateli Godoi;
HUERGO, LUCIANO FERNANDES;
YAMAMOTO, CARLOS ITSUO;
DE SOUZA TADANO, YARA;
Potgieter-Vermaak, Sanja
Palavra-chave:
marine fuel oil;
sulfur limits;
shipping emissions;
port pollution emissions;
Environmental Impact Analysis;
PM2.5
Áreas do conhecimento:
Engenharias; Engenharia Sanitária; Engenharia Ambiental
resumo ...
The world ocean fleet consumes around 4.3 million barrels of heavy fuel oil (HFO) daily, releasing large amounts of sulfur-enriched gaseous and particulate pollutants into the atmosphere. The International Maritime Organization (IMO) has set new sulfur content limit values for HFO under the Global Sulfur Cap 2020 (GSC-2020) program to reduce its environmental and public health impact. This study assesses the environmental benefits of the sulfur content limit values for heavy fuel oil set by the IMO on sulfur emissions, trace element concentrations, and ship related PM2.5 pollution at Paranaguá, the largest grain port in Latin America. X-ray Fluorescence analysis revealed that the concentrations of vanadium (V) and nickel (Ni) in PM2.5 (i.e., finer particulate matter), which are prevalent trace elements in ship exhaust emissions, decreased significantly from 25.4 ng m− 3 and 5.8 ng m− 3 in 2019 to 3.5 ng m− 3 and 2.2 ng m− 3 in 2020, respectively. The V/Ni ratio also changed from 4.3 in 2019 to 1.8 in 2020, suggesting significant changes in the signature of marine vessel emission. Sulfur emissions also decreased, with average concentrations of 2.0 µg m− 3 in 2019 and 1.2 µg m− 3 in 2020. The primary PM2.5 concentration, attributed to ship emissions using V as a tracer, was reduced from ~ 80% in 2019 (mean = 35.8%) to less than 5% (mean = 4.9%) in 2020. Inhalation exposure to V and Ni in PM2.5 showed a decrease in the hazard quotient (HQ) and hazard index (HI) in 2020 compared to 2019, indicating potential health benefits. Our findings underscore the need for more robust international shipping policies prioritizing health objectives and reducing greenhouse gas emissions concurrently. Despite the significant health benefits associated with the implementation of low-sulfur fuels in global shipping, there remains a need for further investigation into the long-term effects of these fuels on air quality and human health. GSC-2020 limits sulfur in HFO, reducing environmental and health impacts. Paranaguá Port air quality shows global emission changes assessed before and after. GSC-2020. PM2.5 sees lower V and Ni in PM2.5, indicating a marine emission shift. Lower V, Ni, and sulfur emissions reduce global health risks from maritime. pollution. GSC-2020 sets new emission standards, impacting policies globally.
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Paula Sacchelli Pacheco;
Sonia Faria Zawadski;
Daniel Eiras
Palavra-chave:
Mixed matrix membranes;
gas separation;
ZIF-67;
PEBAX® MH-1657
resumo ...
This study synthesized mixed matrix membranes (MMMs) using PEBAX® MH-1657 and ZIF-67 with...
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