| 摘要 |
An anaerobic digestion tank that maintains excellent wastewater treatment efficiency although it is used for a long time, and enables wastewater to flow smoothly is provided. An anaerobic digestion tank comprises: a water tank(10) of which an inner part is divided into upper and lower space parts by a filter media(11) for filtering organic matter of wastewater; a pair of wastewater purification lines(20) respectively penetrated into one side of the upper and lower space parts of the water tank divided by the filter media to flow wastewater into the water tank; a pair of nitrogen injection lines(30) for removing alien substances adhered to the filter media by supplying nitrogen into the filter media in the state that the nitrogen injection lines are penetrated into one side of the upper and lower space parts of the water tank; an alien substance discharge line(40) which is connected to an outer portion of the water tank in the state that the alien substance discharge line is penetrated into one side portion of the filter media, and into which nitrogen is injected from the respective nitrogen injection lines to discharge alien substances removed from the filter media and nitrogen into the outside; and a pair of purified water discharge lines(50) respectively penetrated into one side of the upper and lower space parts of the water tank to discharge wastewater passing through the filter media. |
