aerated pond
3.4. Using the process of Hydrolysis-acid—Biological Aerated Filter and though recycling the effluent to the hydrolysis pond to undergoing denitrification, when the quantity is 0.054 m3/h and the recycling ratio is 300%, the removal rate of TN can reach 80%, the corresponding effluent TN is bellow 6.5mg/L , far low than when there is no recyling to the hydrolysis pond.

