Abstract: Nitrite accumulated in denitrifying activated sludge mixed liquor when the carbon and electron source, acetate, was limited. If acetate was added to obtain a carbon-to-nitrogen (C:N) ratio in the range of 2:1 to 3:1, nitrate ...

Abstract: In September 2013 an extreme (1000-year) storm event in north central Colorado produced over 40 cm rainfall in four days, resulting in widespread flooding. Along with damage to roads, bridges, housing, and sewers, ...