Journal
BIORESOURCE TECHNOLOGY
Volume 302, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.122829
Keywords
Methane production rate; Hydrogenotrophic methanogens; Biocarrier; Biochar
Funding
- National Natural Science Foundation of China [41773102]
- National Key R&D Program of China [2017YFD0800801-03]
- Strategic Priority Research Program of the Chinese Academy of Science [XDA 21060400]
- Key Research &Development project of Shandong [2017GSF217007, 2019GGX103039]
- Key Technological Innovation Project of Shandong [2017CXGC0305]
- Major independent innovation projects of Qingdao [18-1-1-96-zhz]
- Qingdao Science and Technology Project for People's Livelihood [17-3-3-45-nsh]
- Heilongjiang R&D Program of Application and Advanced Technology [GA19B202]
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The existence of CO2 in biogas will affect its practicality, so the methanation of CO2 is of great significance. Carrier materials play a key role in bioconversion of CO2 to methane during biogas upgrading. Herein, different materials were used to evaluate the bioconversion process of CO2 to methane, which consisted of black ceramsite (BC) and biochars prepared from corn straw and digestate. The results showed that after adding the carrier materials, the methane production rate increased by more than 20%, and the corn straw biochar (CSB) group even increased by more than 70%. This may be attributed to the large specific surface area and more functional groups in corn straw biochar which was suitable for the immobilization of hydrogenotrophic methanogens (HMs). Therefore, corn straw biochar is a good carrier material for the accelerated bioconversion of CO2 to methane.
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