| 摘要 |
PROBLEM TO BE SOLVED: To provide a sewage cleaning treatment apparatus constituted so as to efficiently perform sewage cleaning treatment by more finely dividing air, which is introduced as a revolving flow from the outer peripheral part of a pressurized water stream by using the energy of the pressurized water stream, to eject the same in treated sewage to enhance the dissolving efficiency of oxygen. SOLUTION: Flow channels 11, 21, 31, 41 are respectively formed in a suction nozzle member 1 supplying pressurized water from its end part, intermediate nozzle members 2, 3 and a jet nozzle member 4 to be mutually arranged and connected on the same axis and air introducing nozzles 81, 82, 83 are formed between the nozzle members and an outer housing 5 having an air introducing chamber 51 for supplying air to the air introducing nozzles is arranged around the nozzle members and air introducing holes 13, 23, 33 are formed to the nozzle members so as to tangentially introduce air into the air introducing nozzles from the air introducing chamber 51 and air bubble finely dividing grooves 22, 32 are formed in the inner peripheral surfaces of the flow channels of the nozzle members along the flow channels.
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