Two-stage anaerobic digestion of the organic fraction of municipal solid - waste Effects of process conditions during batch tests

RENEWABLE ENERGY

卷:126

Article

Lavagnolo, Maria Cristina¹  Girotto, Francesca¹  Rafieenia, Razieh¹  Danieli, Luciano¹  Alibardi, Luca² 

[1] Univ Padua, Dept Civil Environm & Architectural Engn, Via Marzolo 9, I-35131 Padua, Italy

[2] Cranfield Univ, Sch Water Environm & Energy, Cranfield Water Sci Inst, Bedford MK43 0AL, England

关键词: Organic waste;    Dark fermentation;    Anaerobic digestion;    Hydrogen;    Methane;    Biogas;   

DOI  :  10.1016/j.renene.2018.03.039

来源: Elsevier

【 摘 要 】

Two-stage anaerobic digestion (AD) batch tests were performed using the organic fraction of municipal solid waste as substrate. Effects of different combination of initial pH (5.5, 7, and 9) and food to microorganism (F/M) ratio (from 0.5 to 6 gVS/gVS) were investigated for hydrogen and methane productions during the first and the second stage of AD, respectively. Results showed that both initial pH and F/M ratio had an impact on hydrogen yield, hydrogen production rate and duration of lag phase. The highest hydrogen yield of 29.8 mLH(2)/gVS was obtained at initial pH of 5.5 and F/M ratio of 6. However, the highest hydrogen production rate (65 mLH(2)/gVS/d) was recorded at pH of 9 and F/M ratio of 6. Increasing the initial pH from 5.5 to 9, led to shorter lag phases for all F/M ratios. Methane production from second phase was not significantly influenced by the F/M ratios tested in the first digestion phase. When compared to single-phase AD, two-stage AD tests resulted in enhanced methane production rates from 373 to 68.5 mLCH(4)/gVS/d, reducing by half both the lag phase and the time required to reach maximum methane production. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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