Desenvolvimentos da biopolpação no Brasil

Biopulping is a technology which application can be advantageous to mechanical or chemical pulping. It presents benefits such as the creation of stronger pulp, as well as energy or chemicals savings. This paper gives an overview of the recent efforts to develop biopulping processes in Brazil as well as provides critical information on biopulping development worldwide. Eucalyptus grandis wood chips have been biotreated by Ceriporiopsis subvermispora in a 50-ton biopulping pilot-plant and used to produce TMP and CTMP pulps on a mill scale, Up to 18% and 27% energy savings have been observed for producing 450-470 CSFreeness TMP and CTMP pulps. Despite darker bio-TMP pulps are produced, one-stage bleaching with 5% H2O2 was sufficient to improve brightness values to 70% and 72% for bio-TMP and control pulps, respectively. Understanding biopulping mechanisms is also relevant because more resistant and competitive fungal species could be selected with basis on a function-directed screen-ing project. As far as the chemical changes induced by the fungus in wood are concerned, recent efforts have pointed out for two different types of wood transformations. One of them involves intense lignin depolymerization in short biotreatment periods, while the other indicates that esterification reactions of oxalate secreted by the Jungas on the polysaccharides chains increase the water saturation point of the fibers. Both transformations are expected to affect the fiber-fiber bonding and, consequently, the physical resistance of wood.

Análise do setor de celulose e papel na era da globalização: um olhar sobre sua produção e mão-de-obra

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Sector forestal-celulosa, agricultura de secano e industria en el Gran Concepción: ¿encadenamiento productivo o enclave?

Se aborda el binomio cadenas productivas y territorio, identificándose dos tipos de desarrollo: el "enclave" del Secano Interior y el de "encadenamiento potencial" entre dicho enclave y la Conurbación del Gran Concepción. Los beneficios de la cadena productiva forestal-celulosa, de importancia mundial, no llegan a su territorio, que permanece en la precariedad. El Gran Concepción, segunda conurbación industrial de importancia nacional, no logra conectarse virtuosamente con su entorno cercano mediante sus redes económicas, ni tampoco con la cadena forestal-celulosa del Secano Interior. El artículo se basa en datos de flujos económicos a partir de la matriz insumo-producto de 2008, en encuestas efectuadas en el contexto de un proyecto del Fondo Nacional de Desarrollo Regional (FNDR, 2008), y en el estudio sobre Chile y sus tipos de desarrollo (Falabella, 2000 y 2002). Finalmente, se plantea la necesidad de generar una plataforma política territorial para el desarrollo económico que facilite la rearticulación productiva.

Aproveitamento de resíduos da indústria de celulose e papel em argamassa mista de revestimento interno

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Isolamento e seleção de micro-organismos produtores de xilanase

Pós-graduação em Agronomia - FEIS

Análise de sistemas de cogeração com gaseificação de licor negro no setor de papel e celulose

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Características morfológicas de celuloses branqueadas de pinus e eucalyptus em analisador óptico automático de fibras

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de resíduos agronômicos da mandioca para fabricação de papéis especiais como recurso alternativo para a comunicação visual

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Caracterização de uma região relacionada à característica Lignotúber em eucalipto

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Complexo xilanolítico de Penicillium sclerotiorum: produção, purificação e caracterização de xilanases e de ß-xilosidases

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

Resíduos de indústria de celulose e papel na fertilidade do solo e no desenvolvimento de eucalipto

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Levantamento para a implantação de um sistema de gestão da qualidade segundo a norma NBR ISO/IEC 17025:2005 no Laboratório de celulose e papel da UNESP-Itapeva

The aim of this study is to perform a situational analysis of the Laboratory of pulp and paper-UNESP ITAPEVA for conducting proposal the accreditation according to ISO / IEC 17025:2005. The ISO / IEC 17025 establishes the criteria for those laboratories wishing to demonstrate their technical competence, which have an effective quality system and are able to generate technically valid results, establishing a single international standard for certifying the competence of laboratories to carry tests and / or calibrations, including sampling. The case study was conducted on laboratory Pulp and Paper Universidade Estadual Paulista (UNESP), campus Itapeva, where we compared the views of the technician responsible for the laboratory and a regular user. The generated conclusion is that the laboratory is unable to initiate an accreditation process, because it fails the requirements such as quality manual, register of subcontractors, research of customer satisfaction, schedule of internal audits, schedule for completion of critical analysis, profile of the functions required, functions current description, documentation of technical requirements for accommodation and environmental conditions, calibration programs, equipment calibration program, programs calibration standards and reports and / or certificate of test and / or calibration, that are in accordance with ISO / IEC 17025:2005, beyond that there is not the possibility to develop and implement a quality system without the commitment of everyone involved, regardless of the functional hierarchy

Ensaios não destrutivos: metrologia e calibração

To perform the quality control of various industries like: petrochemical, nuclear, aerospace, steel, shipbuilding, pulp and paper, and inspection of welded products, castings, forgings, rolled products, among others, used the method of Non-Destructive Testing (NDT). The method is based on the physical properties of the material, so selecting a procedure more appropriate. The company Inter-Metro Serviços Especiais Ltda., with its cutting-edge laboratory, dedicated to the implementation of calibration services and measurement equipment for industrial, medical, occupational safety and Non-Destructive Testing (NDT). It has a trained team, providing guidance and providing support for improving procedures for testing and measuring

Otimização da extração alcalina com peróxido de hidrogênio em seqüência de branqueamento com aplicação de baixo fator kappa

The new market, focused on sustainability and other environmental concerns, refers to innovations that seek alternative forms of production. In pulp and paper bleaching alternative reagents are studied, for example, hydrogen peroxide, in partial substitution of chlorine dioxide in order to reduce the formation of organochlorines. In this context, this study examined the burden of hydrogen peroxide (H2O2) on alkaline extraction stage (stage Ep) required for the bleaching of pulp with eucalyptus kraft pulp, pre-oxygen delignified to obtain equivalent brightness at 90 ± 0.5% ISO, as well as its effect on quality of pulp produced. The pulp was bleached by the sequence D(Ep)DP, with the application of factor kappa of 0.14 and varying the concentration of hydrogen peroxide in Ep stage three, five, seven and nine kilograms of reagent per ton of pulp absolutely drought. The final P stage was optimized with the use of six, nine and twelve pounds of hydrogen peroxide per ton of absolutely dry pulp to achieve the required brightness. The quality of the pulp produced was analyzed based on the kappa number, the brightness and the viscosity. The methods were performed according to standards set by the standard TAPPI (Technical Association of the Pulp and Paper Industry). The best result was obtained using the following D0Ep(7)D1P(6), which showed a viscosity of 19.9 cP, 89.6% ISO brightness, consumption of 94.9 kg / t of reagents and reagent costs of US$ 28.15, because it showed better pulp quality for a lower cost compared to the others. It was found that the greater the amount of hydrogen peroxide in alkaline extraction, the lower the kappa number and increased the amount of residual hydrogen peroxide. The higher the charge of hydrogen peroxide in Ep stage, the lower the need for hydrogen peroxide in the final P stage, reducing the cost of bleaching

Estudos exploratórios sobre propriedades térmicas do compósito cimento-polpa celulósica(CPC)

The search for a more aware use of available raw materials has led to a need to create more sustainable products. The use of natural fibers to reinforce cement, for instance, has been widely studied in the past decades because of the possibility that they can improve material properties such as thermal resistance and to compression, besides conferring a decrease in their total weight. This present study aimed at to conduct preliminary studies on the thermal resistance of the composite cement - Cellulose Pulp, using waste from the pulp and paper industry. Through experiments, it was found that the composite manufactured using the ratio 30 % Portland cement and 70 % pulp, showed satisfactory results regarding its thermal resistance, so it could be considered as a potential thermal insulation material, for use in constructions