| 摘要 |
A nonpoint pollution processing unit using a bio-filter is provided to make a pH condition that microorganisms smoothly cause denitrification and to improve efficiency of water treatment by supplying continuously alkalinity in a carrier containing pearlite and calcium hydrooxide causing alkalinity. A nonpoint pollution processing unit using a bio-filter contains a precipitation part(5) separating foreign materials in rain flown in by difference of specific gravity, a first bio-filter processing unit(40) removing organic compound in the rain flown out from the precipitation part and a second bio-filter processing unit(50) removing nitrogen and phosphorus in the rain flown out from the first bio-filter processing unit. The precipitation part comprises a first settling tank(10) and a second settling tank(30). The first settling tank includes a compartment diaphragm, an influx unit formed into an inclined plate so that the rain is flown into a rear space part, a screen network installed in an opened top part of the first settling tank and connected to the influx unit. |
