The increase in production and consumption of goods has generated a surplus of waste, which destination is commonly the landfilling sites. This represents a major bottleneck in the production chain and creates new challenges for sustainable development. Due to the environmental and economic benefits, the use of renewable and ecological fuels derived from waste has received global attention. Plasma is one of the techniques that enable achieving renewable energy from solid residues, contributing to landfill avoidance and resource reutilization in line with the circular economy principles and supporting United Nations Sustainable Development Goals 7 (affordable and clean energy), 12 (responsible consumption and production), and 13 (climate action). This article presents a review and analysis of literature related to the use of plasma gasification of solid waste as a method of waste recovery. This article portrays the efforts that have been made in this direction and the barriers to the dissemination of technology for commercial applications. The focus of this article comprises (a) extracting valuable aspects from various studies, including laboratory and field studies, (b) summarizing the work done so far, and (c) compiling studies and findings on plasma gasifiers and recent developments.

Considering waste as a possible new resource for useful purposes is one of the strategies included in the circular economy principles. In fact, industrial processes are seen as great contributors to the formation of waste streams. With the aim to attain more sustainable and resilient systems, in this study, a process flow chart was elaborated in an Aspen Plus computer simulator, to obtain the production of pure glycerol from crude glycerol (a by-product of biodiesel production). This process occurs through fractional vacuum distillation, the methanol recovery route in the deacidification process and the removal of methanol from the reaction medium. The separation stages of the crude glycerol implemented enabled a degree of purification of 99.77%, meeting the specifications of the pharmaceutical use. The developed model allowed for the optimization of the purification process, raising by 40% the mass flow rate of pure glycerol. A conclusion could be drawn that the use of crude glycerol is an excellent option for the development of new products with greater added-value, contributing to the zero waste principles and to the circular economy.

Gasification is a process in which a carbonaceous fuel is converted into a fuel gas, usually known as syngas. An Aspen Plus model was developed to simulate the Gasification is a process in which a carbonaceous fuel is converted into a fuel gas, usually known as syngas. An Aspen Plus model was developed to simulate the

Biofuels have been identified as an important alternative to fossil fuels through the upgrading of solid biomass using thermochemical processes. This study aims to accurately represent the decomposition of biomass and the resulting volatiles during gorse torrefaction at low temperatures, considering different residence times within the reactor. Torrefaction is a thermochemical pre-treatment method designed to improve the physical and chemical properties of biomass, towards a better conversion performance. The torrefaction process was numerically simulated using the Aspen Plus software platform, to predict product yields and composition under varied operating conditions. The modeling methodology was supported by experimental data obtained through thermogravimetric analysis (TGA) performed under precisely controlled laboratory conditions. Three different pyrolysis temperatures (200, 250, and 300 °C) were examined at a heating rate of 10 K/min, along with two specific residence times (60 and 80 min). This study illustrates a comprehensive workflow, extending from laboratory TGA experiments to a validated process model for gorse. The model can provide the yield streams of the gorse torrefaction at 6 different conditions (three torrefaction temperatures and two residence times). The resulting model, which utilizes the Yield Reactor, employs empirical correlations from literature that relate product yields to reactor temperature through polynomial functions. Product yields were computed via temperature-dependent polynomial correlations implemented through Fortran subroutines integrated with the Aspen Plus RYIELD reactor block. The results showed an agreement with experimental data of gorse torrefaction, achieving 3.2% average error. At 300 °C with 80 min residence time, the model predicts a solid yield of 42.21%, demonstrating the potential of torrefied gorse as a feedstock for coal co-firing or gasification applications.

O propósito deste artigo foi investigar como ocorre a aprendizagem organizacional e a formação de gestores no Serviço Social do Comércio no Estado da Bahia (SESC-Bahia). Para tanto, adotou-se uma abordagem metodológica qualitativa, tendo sido realizadas 18 entrevistas com os gestores do SESC-Bahia. Utilizou-se do Discurso do Sujeito Coletivo (DSC) como método de tabulação, organização e análise do material empírico. A partir dos discursos dos respondentes, emergiram quatro novas modalidades de aprendizagem de caráter sociointeracionista, além disso surgiram outras cinco já referendadas pela literatura para explicar como se formam os gestores do SESC-Bahia. Neste sentido, os resultados sugerem que o processo de formação de gestores no SESC-Bahia é marcadamente: a) alicerçado numa abordagem socio prática; b) híbrido; c) diverso e d) original. Complementarmente, este trabalho buscou abrir caminhos para novas compreensões e insights sobre estratégias mais eficazes e transformadoras ao desenvolvimento de gestores no âmbito das organizações paraestatais e em outros contextos, confirmando em parte a literatura sobre o assunto, bem como trazendo novas contribuições e implicações.