| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain purifying tank system of useful microorganism group- utilizing type capable of solving a treatment problem of waste water discharged from a home and capable of expecting effect improving water environment of a discharge water channel or rivers. SOLUTION: A first sedimentation separation tank 1, a second sedimentation separation tank 2, a contact aeration tank 3, a sedimentation tank 4 and a discharge tank 5 are provided in a system main body 13 and a useful microorganism group injection device 7 is provided to the upper part of the boundary of the sedimentation tank 4 and the discharge tank 5 and the discharge tank 5 is arranged so as to be capable of returning treated water to both of the first and second sedimentation separation tanks 1, 2.</p> |
