Chapter 4: Activated Sludge Modelling - IqTMA-UVa

Components in ASM1• The i = 13 column represents Alkalinity• It provides an indication of the buffer capacity of thewastewater• The balance must include all the reactions thatinvolve addition or removal of species with protonaccepting capacity• Nitrification tend to decrease and denitrification toincrease• Risk of pH instability at alkalinities < 50 g CaCO 3 /m -3• Lime addition is often use to maintain the pH73