Journal
BIORESOURCE TECHNOLOGY
Volume 290, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121782
Keywords
Mono-cardboard digestion; Thermophilic digestion; Biochar; Biomethane; Microbial networks analysis
Funding
- National Natural Science Foundation of China [51608304, U1806216]
- Young Scholars Program of Shandong University [2018WLJH53]
- China Postdoctoral Science Foundation [2017M622209, 2019T120599]
- Research Fund of China-America CRC for Environment & Health, Shandong University [SDCRC2019-02]
- Research Fund of Tianjin Key Laboratory of Aquatic Science and Technology [TJKLAST-ZD-2017-04]
- Research Fund of Jiangsu Key Laboratory of Anaerobic Biotechnology [JKLAB201702]
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The effect of biochar on the thermophilic digestion of mono-cardboard was investigated. Compared with control group (TO), the maximum rate of biomethane production was significantly improved after the addition of biochar, especially, it has been improved by 40.6% in T1 (0.77 g/gTS sludge) with the methane production of 89.28 mL/gVS. Also, the addition of biochar improved the efficiency of acidogenesis and acetogenesis. However, adverse effects were observed with the biomethane production decreased by 33.98% and the lag phase extended by 35 h in T5 (3.86 g/gTS sludge). Especially, the results showed that the adsorption of biochar played important roles in digestion. In addition, acetoclastic Methanosaeta which considered to be involved in interspecific electron transfer (IET) was enriched after biochar added and the highest diversity of acetogens was obtained in T1. Oppositely, microbial networks analysis showed that the excessive biochar may destroy the diversity of microorganism drastically.
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