We are grateful to the Dutch government agency RVO and Ir. J. Reijnders of RVO for their enduring financial support for Dutch energy and biofuels research. The authors gratefully acknowledge Arjen Rinzema PhD and Sina Salim PhD at WUR for their contribution to the study on the syngas fermentation towards ethanol. Additionally, we are grateful to Qian Zhou PhD from Avans University of Applied Sciences, and Ingenia Consultants & Engineers B.V. for their important contribution on the use of enzymes for biodiesel production. Without their contributions, this book would not have been possible.