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Producing pulp and energy from wheat straw

机译：用麦草生产纸浆和能源

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The aim of this study was to evaluate the use of wheat straw as a raw material in simple biorefinery operations producing papermaking pulps and energy. The first option was to produce pulp for printing and writing papers by hot water treatment followed by alkaline peroxide bleaching. The second option was to produce unbleached pulp for packaging materials by a hot water treatment method, followed by mechanical refining. In both options residual materials are available for energy production, in the form of fines or dissolved solids.rnThe results from the chemical approach showed that the optimum hot water treatment temperature is close to 100℃ and acid is not needed in the stage. Less than 10% of wheat straw is dissolved in these hot water treatment conditions with a temperature below 130℃. Following alkaline bleaching it is possible to produce pulp with over ISO 75% brightness and a yield of over 50%. Paper properties of the resultant wheat straw pulp are relatively good. The results of the mechanical approach showed that 36% of the original wheat straw ends up in the fibre fraction between 30-100 mesh, 13% is coarse fines between 100-200 mesh and 41% of the original raw material is fine fines below 200 mesh.rnThe papermaking properties of the fibre fraction thus obtained were relatively poor suggesting that they could only be used in mixtures with other pulps, or as such in moulded fibre packages.
机译：这项研究的目的是评估在生产造纸浆和能源的简单生物精炼操作中使用麦秸作为原料。第一种选择是通过热水处理，然后用碱性过氧化物漂白来生产用于印刷和书写纸的纸浆。第二种选择是通过热水处理方法，然后机械精炼，​​生产用于包装材料的未漂白纸浆。在这两种选择中，剩余的材料都可以以细粉或溶解固体的形式用于能源生产。化学方法的结果表明，最佳的热水处理温度接近100℃，并且阶段中不需要酸。在低于130℃的这些热水处理条件下，只有不到10％的小麦秸秆溶解。进行碱性漂白后，可以生产出白度超过ISO 75％，收率超过50％的纸浆。所得麦草浆的纸性能相对良好。机械方法的结果表明，36％的原始小麦秸秆最终在30-100目之间的纤维级分中占13％，100％至200目之间的粗粉占13％，而200％以下的原始原料的粗粉占41％。如此获得的纤维级分的造纸性能相对较差，表明它们只能与其他纸浆混合使用，或直接用于模塑纤维包装中。

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