Experiment and analysis of the biological filter by falling water aeration

Experiments of of the biological filter by falling water aeration show that the removal rate of CODcr is 66.9%, of NH
3
-N is 64.5%, of TP is 48%.The ideal effect can be obtained if the water is 100% circulation processing. Combination process around the core that is biological filter by falling water aeration should be good for mountain town water pollution control by this paper.