Low oxygen biologically mediated nutrient removal Application US-8039242-B2 United States of America 18 Oct 2011
Micro-electron acceptor phosphorus accumulating organisms Application US-7879589-B2 United States of America 01 Feb 2011
Low oxygen biologically mediated nutrient removal Application US-7575685-B2 United States of America 18 Aug 2009
Low oxygen biologically mediated nutrient removal Application US-7431839-B2 United States of America 07 Oct 2008