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Particle size characterization of ultrasonic treatment of dry milling coproducts for enhanced biofuel production.

机译：超声处理干磨副产物以增强生物燃料生产的粒度表征。

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摘要

This study characterized the use of ultrasonic energy to increase the production of the methane as a biogas from the anaerobic digestion of coproducts of dry milling. Dried distillers grain with solubles (DDGs), solids, thin stillage, and corn syrup were treated with various ultrasonic conditions and compared to untreated (control) samples. The amplitude ranged from 52.8 microm pp to 160 micrompp and the time was varied from 10 to 50 s. The resulting samples were characterized using scanning electron and optical microscopy (SEM, OM) and particle size analysis. Samples consisting of solid/liquid suspensions (DDGs, solids) showed a significant decrease in particle size (44.5% decrease in DDGS and 42.9% decrease in solids) and an associated increase in the surface area to volume ratio, thus promoting anaerobic digestion for enhanced biochemical methane production (BMP). In addition, thin stillage and corn syrup exhibited a slight increase in the peak particle size. It should be noted that the overall mean particle size decreased (65.73% decrease in syrup, and 74.57% in thin stillage) despite that the peak particle size increased. This observation is counter intuitive to ultrasonic treatment and is believed to be the result of oil agglomeration after being released from lipid bio-layers.
机译：这项研究的特点是利用超声波能量通过干磨副产物的厌氧消化增加甲烷作为沼气的产量。用各种超声条件处理含有可溶物（DDG），固体，稀釜馏物和玉米糖浆的干酒糟，并与未处理（对照）样品进行比较。幅度从52.8微米pp到160微米pp，时间从10到50 s不等。使用扫描电子和光学显微镜（SEM，OM）以及粒度分析对所得样品进行表征。由固/液悬浮液（DDG，固体）组成的样品显示出粒径显着降低（DDGS降低了44.5％，固体降低了42.9％），并且表面积/体积比也随之增加，从而促进了厌氧消化，从而提高了消化率。生化甲烷生产（BMP）。此外，稀釜馏物和玉米糖浆的峰粒径略有增加。应该注意的是，尽管峰值粒径增加了，但总体平均粒径却减小了（糖浆降低了65.73％，稀釜馏物降低了74.57％）。该观察结果与超声处理相反，被认为是从脂质生物层释放后油聚结的结果。

著录项

  • 作者

    Hearn, Cody John.;

  • 作者单位

    Iowa State University.;

  • 授予单位 Iowa State University.;
  • 学科 Agriculture Food Science and Technology.;Engineering Agricultural.
  • 学位 M.S.
  • 年度 2009
  • 页码 75 p.
  • 总页数 75
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农产品收获、加工及贮藏;农业工程;
  • 关键词

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