Enhanced Nitrogen and Phosphorus Removal by Humus Soil Activated Sludge SBR Process

This study has investigated the effect of humus soil activated sludge on the nitrogen and phosphorus removal. The results from experiments indicate that humus soil SBR (HS-SBR) process did not have a better effect on the COD removal compared it with SBR process. They had about 89% removal efficiency on average. HS-SBR process could enhance the removal of nutrient salt, especially TP. The removal efficiency of TN and TP was 80.5% and 90.8%, higher than SBR process by 11.05% and 20.5% respectively. At the typical cycle, HS-SBR could fast deplete organic and enhance nitrification and denitrification. HS-SBR could enhance the phosphorus removal, but the mechanism should go deep into study.