An enhanced activated sludge wastewater treatment method increases volumetric pollutant loading, hydraulic loading capacity and nutrient removal efficiency at a conventional activated sludge wastewater treatment plant. The method describes the control of return activated sludge rates, and the operation...http://www.google.es/patents/US6783671?utm_source=gb-gplus-sharePatente US6783671 - Enhanced activated sludge treatment
