Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Matias Gonçalves, Lindomar; Mendoza-Martinez, Clara; Alves Rocha, Elém Patrícia; Coutinho de Paula, Eduardo; Cardoso, Marcelo

doi:10.3390/en16176314

Cited by 7 publications

(1 citation statement)

References 47 publications

(55 reference statements)

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“…In this way, the green aspect is growing in corporate circles, either by reducing the consumption of some input or fuel, or by handling and reusing waste. The Kraft process generates a large amount of solid waste, mainly sludge from the mill's effluent treatment plant (Gonçalves et al, 2023).…”

Section: The Use Of Active Methodologies In Engineering Educationmentioning

confidence: 99%

Development of pilot plants for engineering education

Castro,

Costa,

Parreira

et al. 2024

RSD

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The rapid changes in social interactions and the easy access to information brought by technological advances require that professors rethink and rebuild teaching to maintain its quality. Active methodologies have been used to ensure the development of essential skills in professionals to deal with the current challenges and demands of the job market. This study presents the use of active project-based methodologies with undergraduate and postgraduate engineering students at the Federal University of Minas Gerais. This study aims to report on the implementation of a pilot plant for the causticizing stage of the pulp and paper Kraft Process and the development of two prototypes of industrial sludge drying equipment using solar energy and to evaluate the impact of the activities on the professional training of the people involved and the development of skills and competencies expected of engineering professionals according to the National Curriculum Guidelines, such as the ability to work in teams. The students could apply their technical knowledge in real situations in an interdisciplinary and multidisciplinary collaborative environment that encourages the resolution of complex engineering problems innovatively, with a holistic and humanistic vision that also considers social and sustainable aspects. They also demonstrated increased motivation and experienced the connection between industry and academia, which is essential to demonstrate the applicability of the techniques learned during the courses.

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Section: The Use Of Active Methodologies In Engineering Educationmentioning

confidence: 99%

Development of pilot plants for engineering education

Castro,

Costa,

Parreira

et al. 2024

RSD

View full text Add to dashboard Cite

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Optimization of the Stacking Process of Wire Mesh Coils in Industrial Processors

Benito,

Hurtado,

Miguel

et al. 2024

Communications in Computer and Information Science

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Assessment of solar drying of Brazilian pulp mill primary sludge

Gonçalves,

Mendoza-Martinez,

Salcedo-Puerto

et al. 2024

J Mater Cycles Waste Manag

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Pulp mill sludge is a challenging by-product in wastewater treatment plants (WWTP), due to high moisture content, and poor dewatering characteristics. Solar drying was identified as an appropriate pre-treatment to reduce sludge moisture and enhance its energy efficiency for combustion purposes. Brazil is the world’s second-largest pulp producer, and its high intensity of annual solar irradiation makes it a prime candidate for the application of solar sludge drying technology. This study evaluates the main characteristics of primary sludge (PS) from pulp mills at 65% and 95% moisture content. An active passive solar dryer, followed by ASPEN Plus software simulation was used to evaluate drying properties and combustion potential. CO2 emission impact was explored, and the environmental effects of primary sludge combustion after solar drying were estimated. As indicated by the findings, the sludge commenced with a solids concentration of 21%, eventually reaching 95.5%, thereby enhancing its suitability for combustion. From the simulation, a heat rate expenditure in sludge combustion reported 24672 kW and 16295 kW for a solids content of 65% and 95%, respectively. Therefore, employing solar drying before the sludge incineration is crucial for minimizing energy consumption during combustion. Additionally, solar energy being cost-free, offers an opportunity to alleviate environmental harm.

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Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Cited by 7 publications

References 47 publications

Development of pilot plants for engineering education

Development of pilot plants for engineering education

Optimization of the Stacking Process of Wire Mesh Coils in Industrial Processors

Assessment of solar drying of Brazilian pulp mill primary sludge

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