TY - JOUR AU - Olofsson, Johanna AU - Barta, Zsolt AU - Börjesson, Pål AU - Wallberg, Ola PY - 2017 DA - 2017/02/23 TI - Integrating enzyme fermentation in lignocellulosic ethanol production: life-cycle assessment and techno-economic analysis JO - Biotechnology for Biofuels SP - 51 VL - 10 IS - 1 AB - Cellulase enzymes have been reported to contribute with a significant share of the total costs and greenhouse gas emissions of lignocellulosic ethanol production today. A potential future alternative to purchasing enzymes from an off-site manufacturer is to integrate enzyme and ethanol production, using microorganisms and part of the lignocellulosic material as feedstock for enzymes. This study modelled two such integrated process designs for ethanol from logging residues from spruce production, and compared it to an off-site case based on existing data regarding purchased enzymes. Greenhouse gas emissions and primary energy balances were studied in a life-cycle assessment, and cost performance in a techno-economic analysis. SN - 1754-6834 UR - https://doi.org/10.1186/s13068-017-0733-0 DO - 10.1186/s13068-017-0733-0 ID - Olofsson2017 ER -