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  • Title: Biotechnologies for greenhouse gases (CH₄, N₂O, and CO₂) abatement: state of the art and challenges.
    Author: López JC, Quijano G, Souza TS, Estrada JM, Lebrero R, Muñoz R.
    Journal: Appl Microbiol Biotechnol; 2013 Mar; 97(6):2277-303. PubMed ID: 23389341.
    Abstract:
    Today, methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) emissions represent approximately 98 % of the total greenhouse gas (GHG) inventory worldwide, and their share is expected to increase significantly in this twenty-first century. CO2 represents the most important GHG with approximately 77 % of the total GHG emissions (considering its global warming potential) worldwide, while CH4 and N2O are emitted to a lesser extent (14 and 8 %, respectively) but exhibit global warming potentials 23 and 298 times higher than that of CO2, respectively. Most members of the United Nations, based on the urgent need to maintain the global average temperature 2 °C above preindustrial levels, have committed themselves to significantly reduce their GHG emissions. In this context, an active abatement of these emissions will help to achieve these target emission cuts without compromising industrial growth. Nowadays, there are sufficient empirical evidence to support that biological technologies can become, if properly tailored, a low-cost and environmentally friendly alternative to physical/chemical methods for the abatement of GHGs. This study constitutes a state-of-the-art review of the microbiology (biochemistry, kinetics, and waste-to-value processes) and bioreactor technology of CH4, N2O, and CO2 abatement. The potential and limitations of biological GHG degradation processes are critically discussed, and the current knowledge gaps and technology niches in the field are identified.
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