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首页> 外文期刊>Bioprocess and Biosystems Engineering >Characterization of mixing and yield stress of pretreated wheat straw slurries used for the production of biofuels through tomography technique
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Characterization of mixing and yield stress of pretreated wheat straw slurries used for the production of biofuels through tomography technique

机译：通过层析成像技术表征用于生产生物燃料的预处理麦草浆的混合和屈服应力

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摘要

Wheat straw is a low-cost feedstock for the production of biofuel. Pretreatment process is an important stage in producing biofuels since it makes the fibers more accessible to enzymatic hydrolysis which is the final step of producing biofuels. Pretreated wheat straw (PWS) slurries are non-Newtonian fluids with yield stress. Mixing of fluids exhibiting yield stress such as the pretreated wheat straw slurry results in the generation of cavern, which is a fully-mixed zone, around the impeller and the stationary regions elsewhere, which causes difficulties in the production of biofuels. In this study, the non-invasive electrical resistance tomography technique was utilized to determine the cavern dimensions as a function of the impeller type and impeller speed. The cavern sizes were then used to measure the yield stress of PWS slurries as a function of fiber size (= 2 and = 6 mm) and fiber concentration (6, 8, and 10 wt%).
机译：小麦秸秆是生产生物燃料的低成本原料。预处理过程是生产生物燃料的重要阶段，因为它使纤维更易于酶解，这是生产生物燃料的最后一步。预处理的小麦秸秆（PWS）浆料是具有屈服应力的非牛顿流体。表现出屈服应力的流体（例如经过预处理的麦草浆）的混合会导致在整个叶轮和其他固定区域周围产生一个完全混合区域的洞穴，这会给生产生物燃料带来困难。在这项研究中，利用非侵入式电阻层析成像技术确定洞穴尺寸与叶轮类型和叶轮速度之间的关系。然后，将洞穴尺寸用于测量PWS浆料的屈服应力，该屈服应力是纤维尺寸（<= 2和<= 6 mm）和纤维浓度（6、8和10 wt％）的函数。

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