Biohydrogen production beyond the Thauer limit by precision design of artificial microbial consortia
İpek Ergal, Oliver Gräf, Benedikt Hasibar, Michael Steiner, Sonja Vukotić, Günther Bochmann, Werner Fuchs, Simon K.‐M. R. Rittmann
Abstract
Abstract Dark fermentative biohydrogen (H 2 ) production could become a key technology for providing renewable energy. Until now, the H 2 yield is restricted to 4 moles of H 2 per mole of glucose, referred to as the “Thauer limit”. Here we show, that precision design of artificial microbial consortia increased the H 2 yield to 5.6 mol mol −1 glucose, 40% higher than the Thauer limit. In addition, the volumetric H 2 production rates of our defined artificial consortia are superior compared to any mono-, co- or multi-culture system reported to date. We hope this study to be a major leap forward in the engineering of artificial microbial consortia through precision design and provide a breakthrough in energy science, biotechnology and ecology. Constructing artificial consortia with this drawing-board approach could in future increase volumetric production rates and yields of other bioprocesses. Our artificial consortia engineering blueprint might pave the way for the development of a H 2 production bioindustry.