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Optimization of simultaneous production of volatile fatty acids and bio-hydrogen from food waste using response surface methodology

机译：使用响应面法从食物垃圾中同时生产挥发性脂肪酸和生物氢的优化

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摘要

Anaerobic digestion of food waste (FW) is commonly considered an effective and green technology to convert solid waste into valuable feedstock including volatile fatty acids (VFAs) and hydrogen. Response surface methodology (RSM) was selected to analyze the production of VFAs and hydrogen from food waste in a batch process. The effect of the three variables i.e. total solid content (TS), pH, and reaction time under each variable at three levels on VFAs and hydrogen production was assessed. The optimum conditions determined via RSM were pH = 7.0, TS = 100 g L-1, and reaction time = 3 d. The maximum VFA and hydrogen production was 26.17 g L-1 and 46.03 mL g(-1) volatile solids added, respectively. The ratio of observed hydrogen (H-o) to predicted hydrogen (H-p) was x 1.0 because of inhibition of hydrogen production by VFA accumulation. The subsequent microbial community analysis result was also consistent with the abovementioned results. The evolution of Bacteroidetes, which facilitate VFA production, has been enriched by about 16.1-times at pH 7.0 followed by 10.2-times at pH 6.0 as compared to that in the uncontrolled pH batch.
机译：厌氧消化食物垃圾（FW）通常被认为是一种有效和绿色的技术，可将固体废物转化为有价值的原料，包括挥发性脂肪酸（VFA）和氢气。选择响应表面方法（RSM），分析批量过程中食物废物的VFA和氢的生产。评估了三个变量的效果。评估了在VFA和氢气产生的三种水平下每种变量下的总固体含量（TS），pH和反应时间。通过RSM确定的最佳条件是pH = 7.0，TS = 100g L-1，反应时间= 3d。最大VFA和氢气产生分别为26.17g L-1和46.03ml G（-1）挥发性固体。观察到的氢气（H-O）与预测氢（H-P）的比率是X＆ 1.0由于VFA积累抑制氢气产生。随后的微生物群落分析结果也与上述结果一致。促进VFA产生的拟菌细胞的演变已经在pH 7.0的富集约16.1倍，然后在不受控制的pH分批中，在pH6.0下进行10.2倍。

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  • 来源
    《RSC Advances》 |2018年第19期|共8页
  • 作者

    Liu Nuo; Jiang Jianguo; Yan Feng; Xu Yiwen; Yang Meng; Gao Yuchen; Aihemaiti Aikelaimu; Zou Quan;

  • 作者单位

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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