Douglas John Lumley
Utilities General Representative - Gryaab AB, Sweden


Douglas John Lumley is a Senior Advisor at Gryaab AB which operates the Rya WWTP in Gothenburg on Sweden’s west coast. The Rya WWTP serves over 750 000 persons, features enhanced biological and chemical treatment and is a fully automated facility that is only manned part-time. See

Activities in IWA: – IWA Strategic Council (since 2017, a representative for Utilities) – MC member IWA Specialized Group on “Design, Operation and Costs of Large Wastewater Treatment Plants” – Editor: Water Practice and Technology – Member since 1987