You can use 2 ppm of O2 in ...
Published by Paolo Broglio, Ph.D in Applied Biology ( Biological Wastewater Treatments ) , M.Sc. in Environmental Science
You can use 2 ppm of O2 in the first tank and use 0-0,5 max O2 in the second tank. Nitrification in the first step and denitrification in the second tank .