TY - JOUR AU - Wahid, Radziah AU - Mulat, Daniel Girma AU - Gaby, John Christian AU - Horn, Svein Jarle PY - 2019 DA - 2019/04/30 TI - Effects of H2:CO2 ratio and H2 supply fluctuation on methane content and microbial community composition during in-situ biological biogas upgrading JO - Biotechnology for Biofuels SP - 104 VL - 12 IS - 1 AB - Commercial biogas upgrading facilities are expensive and consume energy. Biological biogas upgrading may serve as a low-cost approach because it can be easily integrated with existing facilities at biogas plants. The microbial communities found in anaerobic digesters typically contain hydrogenotrophic methanogens, which can use hydrogen (H2) as a reducing agent for conversion of carbon dioxide (CO2) into methane (CH4). Thus, biological biogas upgrading through the exogenous addition of H2 into biogas digesters for the conversion of CO2 into CH4 can increase CH4 yield and lower CO2 emission. SN - 1754-6834 UR - https://doi.org/10.1186/s13068-019-1443-6 DO - 10.1186/s13068-019-1443-6 ID - Wahid2019 ER -