Anti-thermal shock binding of liquid-state food waste to non-wood pellets.

Abstract: The development and implementation of strategies to assist safe and effective transport and storage of pellets in containers and indoor facilities without heating systems are challenging. This study primarily aimed to reshape the organic fraction of municipal solid waste into a liquid-state binder in order to develop freezing?defrosting-proof non-wood pellets. The introduction of the standard solution of food waste into the process of pelleting consisted of stirring it together with the residual biomass from distillation of cellulosic bioethanol or alternatively spraying very fine droplets on the layer of the starting material before it entered the pilot-scale automatic machine at 200 MPa and 125 °C. The addition by spraying of carbohydrate-rich supplement boiled for five minutes caused the pellets to show increases in apparent density (1250.8500 kg·m?3), durability (99.7665%), and hydrophobicity (93.9785%), and consistently prevented them from suffering severe mechanical fracture by thermal shock. The fractal dimension of breakpoints, cracks, and delamination on the finished surface for these products was the smallest at 1.7500-1.7505. Sprayed pellets would fall into the strictest grid of products for residential heat-and-power units, even after freezing and defrosting. The conclusion is therefore that spraying can spectacularly ensure the reliability of liquid-state food waste as an anti-thermal shock binder for non-wood pellets

Resposta à flexão e análise de tenacidade de argamassas reforçadas com fibra de Curauá

O desenvolvimento e comercialização de materiais compósitos produzidos a partir de fibras naturais são considerados extremamente importante, uma vez que essas fibras reduzirão a dependência dos materiais produzidos com recursos não renováveis. Dentre essas fibras naturais destaca-se a fibra do curauá, sua utilização na produção de compósitos melhora de forma notável as propriedades do conjunto fibra matriz, logo o presente artigo objetiva estudar as propriedades mecânicas de compósitos reforçados com fibra de curauá, em especial sua resistência à flexão e tenacidade. Para isso foram confeccionadas cinco famílias de argamassas, uma de referência sem utilização da fibra e as outras quatro reforçada com fibra variando o comprimento da fibra e sua fração volumétrica. Verificou-se que a fibra do curauá ao ser adicionada em matriz cimentícia melhora suas propriedades mecânicas comparada a um compósito não reforçado com fibra, sua deformação, resistência à flexão e tenacidade são melhoradas

IMPLANTAÇÃO DO CERTIFICADO ISO 9001 EM UMA EMPRESA NO SETOR DE PAPELÃO: AVALIANDO SEUS IMPACTOS ORGANIZACIONAIS / ISO 9001 CERTIFIED IMPLEMENTATION IN A CARDBOARD COMPANY. INTERNAL AND EXTERNAL IMPACTS EVALUATION

O presente trabalho visa apresentar a avaliação dos impactos internos e externos de uma empresa que adotou um sistema de gestão da qualidade total: a certificação ISO 9001. Baseado em um estudo de caso, apoiado paralelamente em referenciais bibliográficos da literatura, em uma empresa do setor de papelão. A pesquisa visa mensurar e avaliar os conceitos básicos de qualidade e os benefícios da certificação. Ao concluir este estudo verificou-se que realmente a obtenção de um certificado ISO 9001 traz diversos impactos organizacionais e conduz à melhoria global da empresa, como a capacidade de gestão e avaliação geral dos relacionamentos, aumento no número de clientes e fornecedores e a melhoria da imagem da empresa diante do mercado. </p

Juice technological quality, lignocellulosic physical-chemical attributes and biomass yield from energy cane clones.

Abstract: Originating from backcrossing generations between wild and commercial sugarcane varieties, ?energy cane? technology promises to revolutionize global energetic scenario, once full use of feedstock is allowed. Therefore, the aim of this study was to assess juice technological quality, lignocellulosic physical-chemical composition, and biomass yield of nine energy cane. The experiment had a randomized block design with five replications for each clone (treatment) (VX12-1659, VX12-1658, VX12-1356, VX12-1191, VX12-1022, VX12-0277, VX12-0201, VX12-0180, and VX12-0046) with five replicates. Following to tillage harvest, stalk samples were assessed for total soluble solids (ºBrix; % juice), sucrose (Pol; % juice), purity (Prt; % juice), reducing sugars (RS; % juice), theoretical sugars recoverable (TSR; kg t-1 stalks), Pol (% cane), RS (% cane), moisture (% cane), fibers (Fib; % cane), and dry biomass yield (DBY; t ha-1). The obtained data was subjected to the following statistical tests (p < 0.05): Shapiro?Wilk, Fisher, Tukey, and Pearson?s linear correlation. Findings revealed null hypothesis rejection, suggesting the clones significantly affected all assessed traits. The individuals VX12-1659, VX12-1658, VX12-1356, VX12-1191, VX12-1022, and VX12-0277 exhibited the highest °Brix (% juice), Pol (% juice), Prt (% juice), TSR, Pol (% cane), moisture (% cane), and Fib (% cane) values. In addition, the clones VX12-1659, VX12-1658, and VX12-1356 resulted in DBY averages higher than other individuals of the population. In fact, all clones showed Type II energy cane typical characteristics due to a low sucrose/fiber ratio. Thus, the energy cane clones are suitable for bioelectricity co-generation.Made available in DSpace on 2019-12-05T00:36:28Z (GMT). No. of bitstreams: 1 MayJuiceTechnological2019.pdf: 1252520 bytes, checksum: bd808ea0341bfb31d60b2123c7f9a4b3 (MD5) Previous issue date: 2019bitstream/item/206203/1/May-Juice-Technological-2019.pd

Characterization of soil-cement bricks with incorporation of used foundry sand

Abstract In order to contribute to the sustainability of the foundry and construction industrial sectors, this work investigated the possibility of employing used foundry sand (UFS) in soil-cement bricks. Modular bricks were prepared with percentages of 10 wt% cement, 0-25 wt% commercial sand, 0-65 wt% used foundry sand, 25-65 wt% clay, and 15-30 wt% gravel dust. A content of 10 wt% Portland cement was adopted to ensure economic feasibility, and gravel was used to improve mechanical strength. The modular bricks were tested to determine their technical properties. The interfaces between the constituent materials were observed by scanning electron microscopy. In durability tests, the bricks showed water absorption and weight loss in accordance with current technical standards. The addition of UFS together with gravel dust reduced water absorption and provided an acceptable level of mechanical resistance, in accordance with established soil-cement standards