Dr. Elena Campos. PhD by University of Lleida and Msc in Agricultural Engineer by Polytechnic University of Madrid (Spain). She has worked for over twenty-five years in treatment of drinking water, industrial water, sewage and organic wastes. Her expertise focuses primarily on sewage biological treatment, desalination and reuse. Currently she develops projects and technical support on wastewater and drinking water into the technical Area of Sacyr Water, company where has been working 2006. Elena has participated and coordinated several research projects and has published more than 40 papers in scientific and technical journals, conferences and book chapters. Elena is also lecturer in three master courses in several Spanish universities.