| 摘要 |
<p>PROBLEM TO BE SOLVED: To remove efficiently organic matter solid contained in wastewater by a method wherein a microbe fixing carrier is filled in a treating tank for treating organic solid containing wastewater, and brought in contact with treating water. SOLUTION: A wastewater treating device 10 is used for treatment of organic solid containing wastewater, and prinipally composed of a precipitation separation tank 11, a contact aeration tank 12, and an aerobic digestion tank 13. The aerobic digestion tank 13 is so constituted that an inside of the tank is kept in an aerobic atmosphere with air blown out from an diffuser 131 provided to a tank bottom part, and the solid in solid concentrated wastewater 112 is principally treated by decomposition with action of the aerobic microbe. When cellulose carriers of about 5 mm side cube 3...3 are filled in the aerobic digestion tank 13 herein, microbes are solidified by sticking or the like inside those carriers 3...3 or both of the surface and the inside. Thereby, a growth concentration of the microbe is raised in the aerobic digestion tank 13, and a decomposition rate of the solid and material difficult to be decomposed can be raised.</p> |
