The environmental biorefinery: state-of-the-art on the production of hydrogen and value-added biomolecules in mixed-culture fermentation

摘要: The environmental biorefinery consists of recovering and adding value to waste, possibly through a multi-product approach. A first implementation such concept is the production methane nutrient-rich digestate by anaerobic digestion in biogas plants. However, have only low added-value plants still require feed-in tariff policies be economically viable. aim this article provide meta-analysis current biomass recovery technologies compatible with applications (i.e. non-sterile conditions carried out microbial mixed culture). focus was particularly on those able produce high value-added fermentation metabolites. To achieve objective, both qualitative (e.g. substrates pretreatments) quantitative data yields, productivities, process parameters) were retrieved from 624 manually-checked research articles, excluding review papers, 134 patents published after 1997. In addition, straightforward market study for nine promising biomolecules: H2, ethanol, acetate, propionate, lactate, 1,3-propanediol, butyrate, caproate polyhydroxyalkanoates (PHAs). Finally, feasibility producing each biomolecule context an discussed light performances their related bottlenecks.