| 摘要 |
PROBLEM TO BE SOLVED: To provide a waste water treatment method and a waste water treatment device where the collapse of granule sludge in a continuous biological treatment apparatus is suppressed, and high speed treatment is made possible.SOLUTION: Provided is a waste water treatment method comprising: a continuous type biological treatment step where, while continuously flowing waste water into a continuous type biological type treatment tank 10, the waste water is subjected to biological treatment by biological sludge; and a sludge feed step where granule sludge with a grain size of 200 μm or more is fed from a biological sludge feed line 28 to the continuous type biological treatment tank 10, and the BOD sludge load of the continuous type biological tank 10 in the continuous type biological treatment step lies in the range of 0.08 to 0.2 kgBOD/kgMLVSS/day.SELECTED DRAWING: Figure 1 |
