Dr Bill Barber is a chartered engineer and environmentalist with PhD and degree in Chemical Engineering. Bill has worked in research and development, consulting for multi-national companies, technology development and sales, and for the UK’s largest Water Company, United Utilities where, as a technical advisor, he helped develop detailed carbon footprint modelling options for sludge treatment. He has worked on projects in the UK, Europe, Asia, Australia, New Zealand, and North America on industrial and municipal wastewater treatment. Bill has recently written the IWA textbook on thermal hydrolysis as well as numerous peer-reviewed articles. He is a reviewer for several academic journals related to wastewater and sludge management.