![](/sites/default/files/reference_icons/US%20EPA%202000b%20Wastewater%20Technology%20Fact%20Sheet%20Trickling%20Filters%20Nitrification.jpg)
Short factsheet on nitrification in trickling filters (form the United States Environment Protection Agency (EPA).
U.S.EPA (2000): Trickling Filters Nitrification. (= Wastewater Technology Fact Sheet, EPA 832-F , 15 ). United States Environment Protection Agency URL [Accessed: 17.05.2012]