2020年8月
Eco-compatible biochar mitigates volatile fatty acids stress in high load thermophilic solid-state anaerobic reactors treating agricultural waste
BIORESOURCE TECHNOLOGY
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- 巻
- 309
- 号
- 開始ページ
- 123366
- 終了ページ
- 123366
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.biortech.2020.123366
- 出版者・発行元
- ELSEVIER SCI LTD
A high concentration of accumulated volatile fatty acids (VFAs) is one of the most important factors resulting in reactor failure during solid-state anaerobic digestion. In this study, the feedstock-to-inoculum (F/I) ratio (0.5, 2, 3, 4 and 6) and the recovery method after failure (biochar addition or inoculum addition) were investigated in batch solid-state anaerobic digestion fed with rice straw and pig urine. An F/I ratio of 3 was the threshold for stable operation, while the reactors failed at F/I ratios of 4 and 6 because of high accumulated VFAs concentrations (above 30 g HAc/kg). Biochar addition (10% or 20% (wet weight) of the mixture) was as effective as inoculum addition (by adjusting the F/I ratio to 2 or 3) in promoting VFAs degradation in failed reactors within a short period (< 1 day). The buffering capacity of biochar was important in promoting VFAs degradation.
- リンク情報
- ID情報
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- DOI : 10.1016/j.biortech.2020.123366
- ISSN : 0960-8524
- eISSN : 1873-2976
- Web of Science ID : WOS:000569074800016