| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve space saving of the whole apparatus in a state of maintaining the decomposition efficiency of an organic matter.SOLUTION: A wastewater purification apparatus 100 includes: a reaction tank 120 which stores microorganisms, brings the microorganisms into contact with wastewater DW to generate purified water PW, has a supply port 122 through which the wastewater DW is supplied and a discharge port 124 provided vertically below the supply port 122 to discharge the purified water PW, and forms a downward flow between the supply port 122 and the discharge port 124; a bubble introduction part 160 which introduces air bubbles into the purified water PW discharged from the discharge port 124 to generate a bubble liquid BW, which is bubble-containing purified water PW; and a bubble liquid return part 170 which returns the bubble liquid BW into a part located vertically below the supply port 122 and vertically above the discharge port 124 in the reaction tank 120. In the reaction tank 120, air bubbles in the bubble liquid BW adhere to suspended materials in the wastewater DW to separate the suspended materials by floatation.</p> |
