Biofilter for waste water treatment with intermittent aeration carries out nitrification and denitrification in an economical process.

摘要

Nitrogenous waste water is treated in a biofilter with upwards flow and an aerator near its base. The aeration of the water is carried out intermittently, for periods of 2 to 20 minutes followed by no aeration for 2 to 20 minutes, the exact times varied according to the flow rate.