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Mass conversion pathway during anaerobic digestion of wheat straw

机译：麦秆厌氧消化过程中的大规模转化途径

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摘要

A material flow analysis (MFA) method was employed to investigate elemental flow direction during the anaerobic digestion (AD) of wheat straw (WS) pretreated with potassium hydroxide. A lab-scale batch AD experiment conducted at 35 +/- 1 degrees C was investigated to realize carbon conversion in biogas, liquid and solid digestates. The results showed that the highest growth rate of carbon conversion in biogas was observed from the fourth day to the twenty-fourth day, which accounted for 70.64%. The cumulative biogas production of WS was 531 mL g(-1)VS, along with a high volatile solids degradation rate (55.0%). The MFA results indicated that the flow mass fractions of carbon in biogas, liquid and solid digestates were 49.96%, 5.61% and 44.43%, respectively. The flow mass fraction of nitrogen in liquid and solid digestates was 45.65% and 54.35%, respectively. This study can provide a theoretical basis for elemental flow in each product from biogas projects.
机译：采用材料流动分析（MFA）方法来研究用氢氧化钾预处理的小麦吸管（WS）的厌氧消化（AD）中的元素流动方向。 研究了在35 +/- 1℃下进行的实验室批次AD实验，实现沼气，液体和固体消化中的碳转化。 结果表明，从第四天到第二十四日观察到沼气中的碳转化率最高的增长率，占70.64％。 WS的累积沼气产生为531ml g（-1）Vs，以及高挥发性固体降解速率（55.0％）。 MFA结果表明，沼气中的碳流质量分数分别为49.96％，5.61％和44.43％。 液体和固体消化中的氮气的流量分别分别为45.65％和54.35％。 本研究可以为来自沼气项目的每种产品中的元素流动提供理论依据。

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  • 来源
    《RSC Advances》 |2020年第46期|共8页
  • 作者

    Gao Jian; Li Juan; Wachemo Akiber Chufo; Yuan Hairong; Zuo Xiaoyu; Li Xiujin;

  • 作者单位

    Beijing Univ Chem Technol Dept Environm Sci &

    Engn 15 Beisanhuan East Rd Beijing 100029 Peoples R China;

    Beijing Municipal Ecol &

    Environm Monitoring Ctr 14 Chegongzhuang West Rd Beijing 100048 Peoples R China;

    Beijing Univ Chem Technol Dept Environm Sci &

    Engn 15 Beisanhuan East Rd Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Dept Environm Sci &

    Engn 15 Beisanhuan East Rd Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Dept Environm Sci &

    Engn 15 Beisanhuan East Rd Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Dept Environm Sci &

    Engn 15 Beisanhuan East Rd Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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