Productivity and costs of Beller-Buncher and forest processor in stands of eucalypts in first cut

The rationalization of forest harvesting and minimization costs is a constant search by the managers involved in this process, making them decide practices which are economically viable to optimize that operation. This study aimed to evaluate technically and economically the performance of feller-buncher and the forest processor in stands of eucalypts in first cut. The technique analysis included time and movements, productivity, efficiency operational and mechanical availability. The economic analysis included the parameters operational cost, harvesting cost and energy consumption. Aiming the optimization the cost of forest harvesting, the system composed by feller-buncher and processor forest presented itself as a technically and economically viable alternative to harvesting eucalypt in first cut or stands that do not have bifurcated trees.

A utilização de modelos matemáticos para a otimização de processos

This dissertation has as main theme the discuss about how the use of mathematical models for process optimization. The current scenario of strong competition to conquer the consumer market necessitates the development of improvements to better performance of the process as a whole, is to reduce costs, increase efficiency or effectiveness. Thus, the use of methodologies to assist in this process is becoming increasingly viable. Methodologies developed in the past are being studied and improved. An example is the Desirability, the object of the present study, which was developed in the 80's and has been improved over time. To understand and study this methodology was applied to the desirability function in three instances, where it was used Design of Experiments (DOE), taken from scientific papers, using the Solver tool (Excel ®) and desirability (Minitab ®). Thus, in addition to studying the methodology, it was possible to compare the performance of tools used for optimization in different situations. From the results of this study, it was possible to validate the superiority of one of the models studied compared fairly

Gerenciamento de inventário por meio de ferramentas de controle da produção em empresas de higiene pessoal, perfumaria e cosméticos

This action-research work presents tools which are related to production monitoring: Follow-up of Products Release from Quality Department and Follow-up of Production Volumes. Both tools allows controlling release delays of finished goods based on the quality specifications, and the accurate analysis of production volumes variations compared to pre-established plans. They have direct impact into enterprises inventory levels that are part of Toiletries, Perfumery and Cosmetics market segment. By applying these tools, it´s possible to identify opportunities for process optimization that brings benefits for the final customer. The results seen by the tools application are presented by the analysis of delayed stock for release quantities evolution and testimonies from professionals of Supply Chain

Otimização do processo de usinagem da superliga nimonic 80A utilizando o Método de Taguchi

Atualmente, atender as necessidades dos consumidores é uma das metas mais importantes, os consumidores estão em busca de produtos com qualidade e preços mais acessíveis, para isso, é indispensável que as empresas se atualizem para melhorar seus produtos e serviços. Com este cenário, as superligas estão cada vez mais ganhando mercado, pois possuem ótimas propriedades, principalmente em relação a operar em temperaturas elevadas, podendo proporcionar maior eficiência para motores que necessitam trabalhar em altas temperaturas. Em contra partida a essa vantagem, as superligas possuem uma baixa usinabilidade, sendo importante a análise do processo de usinagem para se tornarem mais aplicáveis. Este trabalho visa à otimização do processo de torneamento cilíndrico da superliga Nimonic 80A, com o intuito de melhorar a qualidade do produto, utilizando o Método de Taguchi, com o arranjo ortogonal L16, sendo o comprimento de corte definido como variável resposta e analisados seis fatores que poderiam influenciar na sua variação, tais fatores são: velocidade de corte, avanço, profundidade de corte, tipo de pastilha, lubrificação e dureza do material. Os resultados obtidos demonstraram que os fatores avanço, tipo de pastilha e lubrificação são significativos e exercem influencia no processo, sendo que o avanço deve ser ajustado no nível de 0,12 mm/rev, a pastilha a ser utilizada deve ser CP250 e a lubrificação deve ser feita de maneira abundante, para a otimização do processo. Com a análise dos resultados, também podemos observar a eficiência e confiabilidade do método utilizado, mostrando resultados coerentes

Avaliação fenotípica e genotípica de segregantes de uma linhagem industrial de Saccharomyces cerevisiae

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desempenho de leveduras obtidas em indústria de Mato Grosso do Sul na produção de etanol em mosto a base de cana de açúcar

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Influência do desponte de panículas de sorgo sacarino sobre a qualidade da matéria-prima e produção de bioetanol

Pós-graduação em Microbiologia Agropecuária - FCAV

Properties of films obtained from biopolymers of different origins for skin lesions therapy

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Reologia de fluidos envolvidos no processo de obtenção de bioetanol

Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

Avaliação da influência da fermentação fúngica em estado sólido na obtenção de compostos fenólicos a partir de resíduos de café

Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

Seleção, avaliação e utilização de uma levedura personalizada para a produção de etanol

Pós-graduação em Microbiologia - IBILCE

Produção de etanol a partir de sorgo sacarino com tratamento enzimático

Pós-graduação em Microbiologia Agropecuária - FCAV

Optimal control strategy for fed-batch enzymatic hydrolysis of lignocellulosic biomass based on epidemic modeling

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Production of ginger vinegar

Vinegar is a food of condiments group that have great use in the food industry. This study aimed to evaluate the effects of parameters of the acetic fermentation process in the production of ginger vinegar. A suspension of ginger rhizomes with 12% of starch was subjected to enzymatic hydrolysis process to obtain hydrolyzed with 85.6% of glucose. After the alcoholic fermentation the wine was obtained with 40.3% ethanol. The acetic fermentation process of ginger alcoholic solution followed a completely randomized design in a factorial for three factors at two levels. The independent variables were: temperature, nutrients and proportion of "strong vinegar" and alcoholic solution (initial acidity). Results showed variation from 2.74 to 3.70% for dry extract and 2.13 to 2.83% for ash in vinegars. The profile of organic acids of ginger vinegars showed the presence of acetic, citric, malic and succinic acids in all treatments. The condition of 20 degrees C, initial acidity 1:1, with addition of nutrients allow obtaining good quality vinegars and higher GK yields.

Bacterial cellulose biocomposites for guided tissue regeneration

Bacterial cellulose (BC) has become established as a remarkably versatile biomaterial and can be used in a wide variety of scientific applications, especially for medical devices. In this work, the bacterial cellulose fermentation process is modified by the addition of chondroitin sulfate and hyaluronic acid (1% w/w) to the culture medium before the bacteria is inoculated. Besides, biomimetic precipitation of calcium phosphate of biological interest from simulated body fluid on bacterial cellulose was studied. Chondroitin sulfate and hyaluronic acid influences in bacterial cellulose were analyzed using transmission infrared spectroscopy (FTIR), XRD (X-ray diffraction) and scanning electron microscopy (SEM). FTIR analysis showed interaction between bacterial cellulose nanobiocomposites and calcium phosphate and XRD demonstrated amorphous calcium phosphate and calcium chloride on bacterial cellulose nanobiocomposites. SEM images confirmed incorporation of calcium phosphate in bacterial cellulose nanobiocomposites surface with different calcium phosphate particles morphology.