denitrification

The most common method of biological nitrogen removal is by combining the nitrification of the autotrophic nitrobacter and nitrosomonas with the denitrification of heterotrophic denitrifying bacteria.

- Planting some aquaplants such as aloe and eelgrass in the built marsh land and use its denitrification and phosphorus removal function to strengthen the purifying of Suzhou river water by its.