| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve oxygen dissolving efficiency by making a bubble superfine by the synergistic effect of an introduced pressurized water current and an air current spirally introduced from the periphery of the water current and injecting the superfine bubble into the sewage to be treated and to provide the sewage purifying device by which sewage and even viscous livestock excrement are purified by aeration. SOLUTION: The suction nozzle member 1 for sucking pressurized water, intermediate nozzle members 2 and 3 and injection nozzles each having an inner water passage are arranged on the same axis and joined to one another, an air inlet nozzle is formed between the nozzle members, and a housing 5 is provided around the intermediate nozzles to form an air inlet chamber 51. The air inlet chamber 51 communicates with the air inlet nozzle through an air inlet hole. A pressurized water feed pipe P1 is connected to the end of the suction nozzle member and an air feed pipe P2 for supplying air to the air inlet chamber 51 to the housing 5, and a coarse bubble micronizing groove is formed on the inner periphery of the intermediate nozzle member and on the downstream side of the air inlet nozzle other than the final lower-stage air inlet nozzle.</p> |
