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| Number | Title | Issue Date |
| 7534351 | Pressurized biological waste water purification process There is provided a reaction system capable of, in the feeding of liquid stored after gas-liquid mixing into waste water to be treated of a reaction tank, conditioning the interior of the reaction tank to a pressurized state so as to simultaneously accomplish enhanc... | 05/19/2009 |
| 7105092 | Sewage treatment process by activated-sludge method comprising line atomizing treatment Disclosed is a waste water disposal process in the biosolid method according to a line atomizing treatment in which a reactive gas containing oxygen or oxygen and ozone as hardly soluble gases is dissolved/stored in water as being converted into ultrafine bubbles. T... | 09/12/2006 |
