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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"Pulping"”.
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The purification of semi-chemical pulping waste by aeration
… of this oxygen demand of semi-chemical kraft pulping waste before the waste is discharged into streams. The waste used in this investigation was prepared from a pulping mixture obtained from the Big Island, Virginia, mill of the National Container Corporation, and as prepared, had a total …
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Structural changes to Pinus radiata wood lignin during kraft pulping and bleaching
… lignin will assist the development of improved pulping and bleaching sequences. However, before this can be done, it is necessary to develop approaches to lignin isolation which provide more representative lignin samples without resorting to what are often very tedious extraction procedures. A …
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Analysis of intra-increment pulping and papermaking properties of loblolly pine wood
… to four different time schedules using kraft pulping process. All other cooking variables were held constant. A total of twenty pulps were prepared. Significant differences were observed in pulp yields between intra-incremental growth zones. For the longer digestion times, fraction 1, the …
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Soda Anthraquinone (Soda AQ) and Bio-chemical pulping process on napier grass for papermaking industry
… determine the effects of different optimization pulping process on the pulpability and mechanical properties; to determine the surface characterization of paper by different pulping process. Napier grass sample would be undergoing of different pulping process (Soda-AQ pulping, Bio-chemical and …
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Rapid analysis of inorganic and organic anions in kraft pulping liquors by capillary zone electrophoresis
… sulphite, sulphide and polysulphide in kraft pulping liquors and effluents by capillary zone electrophoresis. In addition, several other key anions, including: hydroxide, carbonate, oxalate, formate and chloride can be quantified in the same process liquors. Two approaches were developed for …
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The effect of whole tree chips in pulp and papermaking
… Many reports have been published in the field of pulping whole tree chips, and articles pertinent to softwood pulping are discussed in the literature review of the present study. Because a noticeable lack of information on mixed component pulping of southern pines was observed in the literature, …
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Investigation of organic composition of potential plants as alternative fiber in paper making industry
… crops; to determine the influence of different pulping process and process variables on the physical and chemical properties. Every chemical components analyse; Cellulose, Hemicellulose, Ash and Lignin content by TAPPI Test Method. All of three samples were undergo acidic and alkali pulping …
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Development and evaluation of linerboard made from soda-anthraquinone treated coconut coir fiber for protective packaging
… fiber (ILF). Fiber characterization, soda-AQ pulping optimization, mechanical treatment (beating) and blending process of the coir fiber were investigated to optimize the characteristics of this linerboard. The coir fibers were characterized using chemical and morphological analyses, to assess …
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Applications and Methods for Increased Liberation and Separation in the Deinking of Recycled Paper Fiber
… surfaces after they are liberated during the pulping process. Team members and I developed a novel method of measuring the degree of liberation of oil-based ink by ζ-potential measurement. The same method has been used to determine the degree of liberation of water-based ink. It has been found …
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Technical review and economic evaluation: steam- explosion/fractionation of biomass
… of wood. Steam -explosion pulping may prove to be an alternative to currently practiced standard pulping processes which require large capital investments, cause significant environmental problems, and produce a narrow range of products. In addition, …
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Evaluation of ligninolytic enzymes of (coptotermes curvignathus) gut bacteria for oil palm residues biodelignification
… of oil palm residues for sustainable pulping. The lignin degrading bacteria (LDB) from the termite gut were isolated and the lignin degrading enzymes (LDE) from the LDB cultures in kraft lignin-induced media was expressed. Bacterial growth rates were determined by measuring OD600 of …
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Anaerobic treatment of a paper plant effluent
… scale. The process produces paper by re-pulping waste paper. Effluent from the process has a Chemical Oxygen Demand (COD) concentration of approximately 4500 mg/l with a sulphate content of approximately 300 mg SO₄²⁻/l. The upflow anaerobic sludge bed (UASB) reactor was selected for the …
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Using microarrays to elucidate the genetic basis of wood density in sitka spruce and poplar
… for building, construction, and also for the pulping industry.<br/>The high demand for wood and the increasing human population mean that<br/>natural forests are being lost and degraded. A potential solution to this problem is<br/>to improve the productivity of our plantation forests to …
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Wood extractives in hemicellulose stabilized emulsions
… can be recovered from sawmills, paper making and pulping process, according to current knowledge, utilized as emulsion stabilizers. This study aims at evaluating the role of wood extractives present in hemicellulose isolates for emulsion stabilization. This study investigated the characterisation …
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Valorising South African lignin as a sustainable bitumen additive in pavement engineering
… in the cell walls of plants. Lignin-rich spent pulping liquors are produced as waste streams from the paper and pulp industry. Lignin is not widely utilised in higher value applications; however, literature has shown promise with regard to using lignin as a partial substitute for bitumen due to …
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Hydrogen Peroxide Inhibition and Inactivation of Bicupin Oxalate Oxidase
… of oxalate oxidase in cancer treatment, paper pulping, and biofuel cells highlight the need to study the effects of hydrogen peroxide on the CsOxOx catalyzed oxidation of oxalate. Membrane inlet mass spectrometry (MIMS) was used to directly measure initial rates of carbon dioxide formation and …
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Dynamic simulation of a recausticizing plant
… recognized as a very important part of the Kraft pulping process. Because of the multiple objectives involved in the operation of the recausticizing plant, different operating conditions, and the complex interdependencies of the various units of the system, the best operating conditions are not …
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Oil palm residue biodelignification by bacillus cereus ligninase from coptotermus curvignathus gut for handsheet production
… biopulps were ground using refiner mechanical pulping (RMP) and proceeded handsheet making according to technical association pulp and paper industry (TAPPI) standard methods. Treated EFB performed best in mechanical properties with higher tensile index (7.15 Nm/g), tearing index (1.69 mN.m2/g) …
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The ecology of paper mill by-product and its evaluation as a casing medium in the culture of Agaricus bisporus (Lange) Pilat
… salt content, derived from chemicals used in pulping processes. After deposition the sludge undergoes an ageing process during which it dries out and its salt content is reduced. This ageing can be reproduced and accelerated by improved drainage under controlled conditions. The paper mill …
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